diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig index 649f10f584710e..fc5a848e0c46f6 100644 --- a/drivers/clk/Kconfig +++ b/drivers/clk/Kconfig @@ -88,6 +88,13 @@ config COMMON_CLK_RK808 These multi-function devices have two fixed-rate oscillators, clocked at 32KHz each. Clkout1 is always on, Clkout2 can off by control register. +config COMMON_CLK_RP1 + tristate "Raspberry Pi RP1-based clock support" + depends on PCI || COMPILE_TEST + depends on COMMON_CLK + help + Enable common clock framework support for Raspberry Pi RP1 + config COMMON_CLK_HI655X tristate "Clock driver for Hi655x" if EXPERT depends on (MFD_HI655X_PMIC || COMPILE_TEST) diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile index 63dea744d57652..1c278dcf52b1fc 100644 --- a/drivers/clk/Makefile +++ b/drivers/clk/Makefile @@ -70,6 +70,7 @@ obj-$(CONFIG_CLK_LS1028A_PLLDIG) += clk-plldig.o obj-$(CONFIG_COMMON_CLK_PWM) += clk-pwm.o obj-$(CONFIG_CLK_QORIQ) += clk-qoriq.o obj-$(CONFIG_COMMON_CLK_RK808) += clk-rk808.o +obj-$(CONFIG_COMMON_CLK_RP1) += clk-rp1.o obj-$(CONFIG_COMMON_CLK_HI655X) += clk-hi655x.o obj-$(CONFIG_COMMON_CLK_S2MPS11) += clk-s2mps11.o obj-$(CONFIG_COMMON_CLK_SCMI) += clk-scmi.o diff --git a/drivers/clk/clk-rp1.c b/drivers/clk/clk-rp1.c new file mode 100644 index 00000000000000..ae383588063ae9 --- /dev/null +++ b/drivers/clk/clk-rp1.c @@ -0,0 +1,2500 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2023 Raspberry Pi Ltd. + * + * Clock driver for RP1 PCIe multifunction chip. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#include + +#define PLL_SYS_CS 0x08000 +#define PLL_SYS_PWR 0x08004 +#define PLL_SYS_FBDIV_INT 0x08008 +#define PLL_SYS_FBDIV_FRAC 0x0800c +#define PLL_SYS_PRIM 0x08010 +#define PLL_SYS_SEC 0x08014 + +#define PLL_AUDIO_CS 0x0c000 +#define PLL_AUDIO_PWR 0x0c004 +#define PLL_AUDIO_FBDIV_INT 0x0c008 +#define PLL_AUDIO_FBDIV_FRAC 0x0c00c +#define PLL_AUDIO_PRIM 0x0c010 +#define PLL_AUDIO_SEC 0x0c014 +#define PLL_AUDIO_TERN 0x0c018 + +#define PLL_VIDEO_CS 0x10000 +#define PLL_VIDEO_PWR 0x10004 +#define PLL_VIDEO_FBDIV_INT 0x10008 +#define PLL_VIDEO_FBDIV_FRAC 0x1000c +#define PLL_VIDEO_PRIM 0x10010 +#define PLL_VIDEO_SEC 0x10014 + +#define GPCLK_OE_CTRL 0x00000 + +#define CLK_SYS_CTRL 0x00014 +#define CLK_SYS_DIV_INT 0x00018 +#define CLK_SYS_SEL 0x00020 + +#define CLK_SLOW_SYS_CTRL 0x00024 +#define CLK_SLOW_SYS_DIV_INT 0x00028 +#define CLK_SLOW_SYS_SEL 0x00030 + +#define CLK_DMA_CTRL 0x00044 +#define CLK_DMA_DIV_INT 0x00048 +#define CLK_DMA_SEL 0x00050 + +#define CLK_UART_CTRL 0x00054 +#define CLK_UART_DIV_INT 0x00058 +#define CLK_UART_SEL 0x00060 + +#define CLK_ETH_CTRL 0x00064 +#define CLK_ETH_DIV_INT 0x00068 +#define CLK_ETH_SEL 0x00070 + +#define CLK_PWM0_CTRL 0x00074 +#define CLK_PWM0_DIV_INT 0x00078 +#define CLK_PWM0_DIV_FRAC 0x0007c +#define CLK_PWM0_SEL 0x00080 + +#define CLK_PWM1_CTRL 0x00084 +#define CLK_PWM1_DIV_INT 0x00088 +#define CLK_PWM1_DIV_FRAC 0x0008c +#define CLK_PWM1_SEL 0x00090 + +#define CLK_AUDIO_IN_CTRL 0x00094 +#define CLK_AUDIO_IN_DIV_INT 0x00098 +#define CLK_AUDIO_IN_SEL 0x000a0 + +#define CLK_AUDIO_OUT_CTRL 0x000a4 +#define CLK_AUDIO_OUT_DIV_INT 0x000a8 +#define CLK_AUDIO_OUT_SEL 0x000b0 + +#define CLK_I2S_CTRL 0x000b4 +#define CLK_I2S_DIV_INT 0x000b8 +#define CLK_I2S_SEL 0x000c0 + +#define CLK_MIPI0_CFG_CTRL 0x000c4 +#define CLK_MIPI0_CFG_DIV_INT 0x000c8 +#define CLK_MIPI0_CFG_SEL 0x000d0 + +#define CLK_MIPI1_CFG_CTRL 0x000d4 +#define CLK_MIPI1_CFG_DIV_INT 0x000d8 +#define CLK_MIPI1_CFG_SEL 0x000e0 + +#define CLK_PCIE_AUX_CTRL 0x000e4 +#define CLK_PCIE_AUX_DIV_INT 0x000e8 +#define CLK_PCIE_AUX_SEL 0x000f0 + +#define CLK_USBH0_MICROFRAME_CTRL 0x000f4 +#define CLK_USBH0_MICROFRAME_DIV_INT 0x000f8 +#define CLK_USBH0_MICROFRAME_SEL 0x00100 + +#define CLK_USBH1_MICROFRAME_CTRL 0x00104 +#define CLK_USBH1_MICROFRAME_DIV_INT 0x00108 +#define CLK_USBH1_MICROFRAME_SEL 0x00110 + +#define CLK_USBH0_SUSPEND_CTRL 0x00114 +#define CLK_USBH0_SUSPEND_DIV_INT 0x00118 +#define CLK_USBH0_SUSPEND_SEL 0x00120 + +#define CLK_USBH1_SUSPEND_CTRL 0x00124 +#define CLK_USBH1_SUSPEND_DIV_INT 0x00128 +#define CLK_USBH1_SUSPEND_SEL 0x00130 + +#define CLK_ETH_TSU_CTRL 0x00134 +#define CLK_ETH_TSU_DIV_INT 0x00138 +#define CLK_ETH_TSU_SEL 0x00140 + +#define CLK_ADC_CTRL 0x00144 +#define CLK_ADC_DIV_INT 0x00148 +#define CLK_ADC_SEL 0x00150 + +#define CLK_SDIO_TIMER_CTRL 0x00154 +#define CLK_SDIO_TIMER_DIV_INT 0x00158 +#define CLK_SDIO_TIMER_SEL 0x00160 + +#define CLK_SDIO_ALT_SRC_CTRL 0x00164 +#define CLK_SDIO_ALT_SRC_DIV_INT 0x00168 +#define CLK_SDIO_ALT_SRC_SEL 0x00170 + +#define CLK_GP0_CTRL 0x00174 +#define CLK_GP0_DIV_INT 0x00178 +#define CLK_GP0_DIV_FRAC 0x0017c +#define CLK_GP0_SEL 0x00180 + +#define CLK_GP1_CTRL 0x00184 +#define CLK_GP1_DIV_INT 0x00188 +#define CLK_GP1_DIV_FRAC 0x0018c +#define CLK_GP1_SEL 0x00190 + +#define CLK_GP2_CTRL 0x00194 +#define CLK_GP2_DIV_INT 0x00198 +#define CLK_GP2_DIV_FRAC 0x0019c +#define CLK_GP2_SEL 0x001a0 + +#define CLK_GP3_CTRL 0x001a4 +#define CLK_GP3_DIV_INT 0x001a8 +#define CLK_GP3_DIV_FRAC 0x001ac +#define CLK_GP3_SEL 0x001b0 + +#define CLK_GP4_CTRL 0x001b4 +#define CLK_GP4_DIV_INT 0x001b8 +#define CLK_GP4_DIV_FRAC 0x001bc +#define CLK_GP4_SEL 0x001c0 + +#define CLK_GP5_CTRL 0x001c4 +#define CLK_GP5_DIV_INT 0x001c8 +#define CLK_GP5_DIV_FRAC 0x001cc +#define CLK_GP5_SEL 0x001d0 + +#define CLK_SYS_RESUS_CTRL 0x0020c + +#define CLK_SLOW_SYS_RESUS_CTRL 0x00214 + +#define FC0_REF_KHZ 0x0021c +#define FC0_MIN_KHZ 0x00220 +#define FC0_MAX_KHZ 0x00224 +#define FC0_DELAY 0x00228 +#define FC0_INTERVAL 0x0022c +#define FC0_SRC 0x00230 +#define FC0_STATUS 0x00234 +#define FC0_RESULT 0x00238 +#define FC_SIZE 0x20 +#define FC_COUNT 8 +#define FC_NUM(idx, off) ((idx) * 32 + (off)) + +#define AUX_SEL 1 + +#define VIDEO_CLOCKS_OFFSET 0x4000 +#define VIDEO_CLK_VEC_CTRL (VIDEO_CLOCKS_OFFSET + 0x0000) +#define VIDEO_CLK_VEC_DIV_INT (VIDEO_CLOCKS_OFFSET + 0x0004) +#define VIDEO_CLK_VEC_SEL (VIDEO_CLOCKS_OFFSET + 0x000c) +#define VIDEO_CLK_DPI_CTRL (VIDEO_CLOCKS_OFFSET + 0x0010) +#define VIDEO_CLK_DPI_DIV_INT (VIDEO_CLOCKS_OFFSET + 0x0014) +#define VIDEO_CLK_DPI_SEL (VIDEO_CLOCKS_OFFSET + 0x001c) +#define VIDEO_CLK_MIPI0_DPI_CTRL (VIDEO_CLOCKS_OFFSET + 0x0020) +#define VIDEO_CLK_MIPI0_DPI_DIV_INT (VIDEO_CLOCKS_OFFSET + 0x0024) +#define VIDEO_CLK_MIPI0_DPI_DIV_FRAC (VIDEO_CLOCKS_OFFSET + 0x0028) +#define VIDEO_CLK_MIPI0_DPI_SEL (VIDEO_CLOCKS_OFFSET + 0x002c) +#define VIDEO_CLK_MIPI1_DPI_CTRL (VIDEO_CLOCKS_OFFSET + 0x0030) +#define VIDEO_CLK_MIPI1_DPI_DIV_INT (VIDEO_CLOCKS_OFFSET + 0x0034) +#define VIDEO_CLK_MIPI1_DPI_DIV_FRAC (VIDEO_CLOCKS_OFFSET + 0x0038) +#define VIDEO_CLK_MIPI1_DPI_SEL (VIDEO_CLOCKS_OFFSET + 0x003c) + +#define DIV_INT_8BIT_MAX 0x000000ffu /* max divide for most clocks */ +#define DIV_INT_16BIT_MAX 0x0000ffffu /* max divide for GPx, PWM */ +#define DIV_INT_24BIT_MAX 0x00ffffffu /* max divide for CLK_SYS */ + +#define FC0_STATUS_DONE BIT(4) +#define FC0_STATUS_RUNNING BIT(8) +#define FC0_RESULT_FRAC_SHIFT 5 + +#define PLL_PRIM_DIV1_SHIFT 16 +#define PLL_PRIM_DIV1_MASK 0x00070000 +#define PLL_PRIM_DIV2_SHIFT 12 +#define PLL_PRIM_DIV2_MASK 0x00007000 + +#define PLL_SEC_DIV_SHIFT 8 +#define PLL_SEC_DIV_WIDTH 5 +#define PLL_SEC_DIV_MASK 0x00001f00 + +#define PLL_CS_LOCK BIT(31) +#define PLL_CS_REFDIV_SHIFT 0 + +#define PLL_PWR_PD BIT(0) +#define PLL_PWR_DACPD BIT(1) +#define PLL_PWR_DSMPD BIT(2) +#define PLL_PWR_POSTDIVPD BIT(3) +#define PLL_PWR_4PHASEPD BIT(4) +#define PLL_PWR_VCOPD BIT(5) +#define PLL_PWR_MASK 0x0000003f + +#define PLL_SEC_RST BIT(16) +#define PLL_SEC_IMPL BIT(31) + +/* PLL phase output for both PRI and SEC */ +#define PLL_PH_EN BIT(4) +#define PLL_PH_PHASE_SHIFT 0 + +#define RP1_PLL_PHASE_0 0 +#define RP1_PLL_PHASE_90 1 +#define RP1_PLL_PHASE_180 2 +#define RP1_PLL_PHASE_270 3 + +/* Clock fields for all clocks */ +#define CLK_CTRL_ENABLE BIT(11) +#define CLK_CTRL_AUXSRC_MASK 0x000003e0 +#define CLK_CTRL_AUXSRC_SHIFT 5 +#define CLK_CTRL_SRC_SHIFT 0 +#define CLK_DIV_FRAC_BITS 16 + +#define KHz 1000 +#define MHz (KHz * KHz) +#define LOCK_TIMEOUT_NS 100000000 +#define FC_TIMEOUT_NS 100000000 + +#define MAX_CLK_PARENTS 16 + +#define MEASURE_CLOCK_RATE +const char * const fc0_ref_clk_name = "clk_slow_sys"; + +#define ABS_DIFF(a, b) ((a) > (b) ? (a) - (b) : (b) - (a)) +#define DIV_NEAREST(a, b) (((a) + ((b) >> 1)) / (b)) +#define DIV_U64_NEAREST(a, b) div_u64(((a) + ((b) >> 1)), (b)) + +/* + * Names of the reference clock for the pll cores. This name must match + * the DT reference clock-output-name. + */ +static const char *const ref_clock = "xosc"; + +/* + * Secondary PLL channel output divider table. + * Divider values range from 8 to 19. + * Invalid values default to 19 + */ +static const struct clk_div_table pll_sec_div_table[] = { + { 0x00, 19 }, + { 0x01, 19 }, + { 0x02, 19 }, + { 0x03, 19 }, + { 0x04, 19 }, + { 0x05, 19 }, + { 0x06, 19 }, + { 0x07, 19 }, + { 0x08, 8 }, + { 0x09, 9 }, + { 0x0a, 10 }, + { 0x0b, 11 }, + { 0x0c, 12 }, + { 0x0d, 13 }, + { 0x0e, 14 }, + { 0x0f, 15 }, + { 0x10, 16 }, + { 0x11, 17 }, + { 0x12, 18 }, + { 0x13, 19 }, + { 0x14, 19 }, + { 0x15, 19 }, + { 0x16, 19 }, + { 0x17, 19 }, + { 0x18, 19 }, + { 0x19, 19 }, + { 0x1a, 19 }, + { 0x1b, 19 }, + { 0x1c, 19 }, + { 0x1d, 19 }, + { 0x1e, 19 }, + { 0x1f, 19 }, + { 0 } +}; + +struct rp1_clockman { + struct device *dev; + void __iomem *regs; + spinlock_t regs_lock; /* spinlock for all clocks */ + + /* Must be last */ + struct clk_hw_onecell_data onecell; +}; + +struct rp1_pll_core_data { + const char *name; + u32 cs_reg; + u32 pwr_reg; + u32 fbdiv_int_reg; + u32 fbdiv_frac_reg; + unsigned long flags; + u32 fc0_src; +}; + +struct rp1_pll_data { + const char *name; + const char *source_pll; + u32 ctrl_reg; + unsigned long flags; + u32 fc0_src; +}; + +struct rp1_pll_ph_data { + const char *name; + const char *source_pll; + unsigned int phase; + unsigned int fixed_divider; + u32 ph_reg; + unsigned long flags; + u32 fc0_src; +}; + +struct rp1_pll_divider_data { + const char *name; + const char *source_pll; + u32 sec_reg; + unsigned long flags; + u32 fc0_src; +}; + +struct rp1_clock_data { + const char *name; + const char *const parents[MAX_CLK_PARENTS]; + int num_std_parents; + int num_aux_parents; + unsigned long flags; + u32 oe_mask; + u32 clk_src_mask; + u32 ctrl_reg; + u32 div_int_reg; + u32 div_frac_reg; + u32 sel_reg; + u32 div_int_max; + unsigned long max_freq; + u32 fc0_src; +}; + +struct rp1_pll_core { + struct clk_hw hw; + struct rp1_clockman *clockman; + const struct rp1_pll_core_data *data; + unsigned long cached_rate; +}; + +struct rp1_pll { + struct clk_hw hw; + struct clk_divider div; + struct rp1_clockman *clockman; + const struct rp1_pll_data *data; + unsigned long cached_rate; +}; + +struct rp1_pll_ph { + struct clk_hw hw; + struct rp1_clockman *clockman; + const struct rp1_pll_ph_data *data; +}; + +struct rp1_clock { + struct clk_hw hw; + struct rp1_clockman *clockman; + const struct rp1_clock_data *data; + unsigned long cached_rate; +}; + +struct rp1_varsrc { + struct clk_hw hw; + struct rp1_clockman *clockman; + unsigned long rate; +}; + +struct rp1_clk_change { + struct clk_hw *hw; + unsigned long new_rate; +}; + +struct rp1_clk_change rp1_clk_chg_tree[3]; + +static struct clk_hw *clk_xosc; +static struct clk_hw *clk_audio; +static struct clk_hw *clk_i2s; + +static void rp1_debugfs_regset(struct rp1_clockman *clockman, u32 base, + const struct debugfs_reg32 *regs, + size_t nregs, struct dentry *dentry) +{ + struct debugfs_regset32 *regset; + + regset = devm_kzalloc(clockman->dev, sizeof(*regset), GFP_KERNEL); + if (!regset) + return; + + regset->regs = regs; + regset->nregs = nregs; + regset->base = clockman->regs + base; + + debugfs_create_regset32("regdump", 0444, dentry, regset); +} + +static inline u32 set_register_field(u32 reg, u32 val, u32 mask, u32 shift) +{ + reg &= ~mask; + reg |= (val << shift) & mask; + return reg; +} + +static inline +void clockman_write(struct rp1_clockman *clockman, u32 reg, u32 val) +{ + writel(val, clockman->regs + reg); +} + +static inline u32 clockman_read(struct rp1_clockman *clockman, u32 reg) +{ + return readl(clockman->regs + reg); +} + +#ifdef MEASURE_CLOCK_RATE +static unsigned long clockman_measure_clock(struct rp1_clockman *clockman, + const char *clk_name, + unsigned int fc0_src) +{ + struct clk *ref_clk = __clk_lookup(fc0_ref_clk_name); + unsigned long result; + ktime_t timeout; + unsigned int fc_idx, fc_offset, fc_src; + + fc_idx = fc0_src / 32; + fc_src = fc0_src % 32; + + /* fc_src == 0 is invalid. */ + if (!fc_src || fc_idx >= FC_COUNT) + return 0; + + fc_offset = fc_idx * FC_SIZE; + + /* Ensure the frequency counter is idle. */ + timeout = ktime_add_ns(ktime_get(), FC_TIMEOUT_NS); + while (clockman_read(clockman, fc_offset + FC0_STATUS) & FC0_STATUS_RUNNING) { + if (ktime_after(ktime_get(), timeout)) { + dev_err(clockman->dev, "%s: FC0 busy timeout\n", + clk_name); + return 0; + } + cpu_relax(); + } + + spin_lock(&clockman->regs_lock); + clockman_write(clockman, fc_offset + FC0_REF_KHZ, + clk_get_rate(ref_clk) / KHz); + clockman_write(clockman, fc_offset + FC0_MIN_KHZ, 0); + clockman_write(clockman, fc_offset + FC0_MAX_KHZ, 0x1ffffff); + clockman_write(clockman, fc_offset + FC0_INTERVAL, 8); + clockman_write(clockman, fc_offset + FC0_DELAY, 7); + clockman_write(clockman, fc_offset + FC0_SRC, fc_src); + spin_unlock(&clockman->regs_lock); + + /* Ensure the frequency counter is idle. */ + timeout = ktime_add_ns(ktime_get(), FC_TIMEOUT_NS); + while (!(clockman_read(clockman, fc_offset + FC0_STATUS) & FC0_STATUS_DONE)) { + if (ktime_after(ktime_get(), timeout)) { + dev_err(clockman->dev, "%s: FC0 wait timeout\n", + clk_name); + return 0; + } + cpu_relax(); + } + + result = clockman_read(clockman, fc_offset + FC0_RESULT); + + /* Disable FC0 */ + spin_lock(&clockman->regs_lock); + clockman_write(clockman, fc_offset + FC0_SRC, 0); + spin_unlock(&clockman->regs_lock); + + return result; +} +#endif + +static int rp1_pll_core_is_on(struct clk_hw *hw) +{ + struct rp1_pll_core *pll_core = container_of(hw, struct rp1_pll_core, hw); + struct rp1_clockman *clockman = pll_core->clockman; + const struct rp1_pll_core_data *data = pll_core->data; + u32 pwr = clockman_read(clockman, data->pwr_reg); + + return (pwr & PLL_PWR_PD) || (pwr & PLL_PWR_POSTDIVPD); +} + +static int rp1_pll_core_on(struct clk_hw *hw) +{ + struct rp1_pll_core *pll_core = container_of(hw, struct rp1_pll_core, hw); + struct rp1_clockman *clockman = pll_core->clockman; + const struct rp1_pll_core_data *data = pll_core->data; + u32 fbdiv_frac; + ktime_t timeout; + + spin_lock(&clockman->regs_lock); + + if (!(clockman_read(clockman, data->cs_reg) & PLL_CS_LOCK)) { + /* Reset to a known state. */ + clockman_write(clockman, data->pwr_reg, PLL_PWR_MASK); + clockman_write(clockman, data->fbdiv_int_reg, 20); + clockman_write(clockman, data->fbdiv_frac_reg, 0); + clockman_write(clockman, data->cs_reg, 1 << PLL_CS_REFDIV_SHIFT); + } + + /* Come out of reset. */ + fbdiv_frac = clockman_read(clockman, data->fbdiv_frac_reg); + clockman_write(clockman, data->pwr_reg, fbdiv_frac ? 0 : PLL_PWR_DSMPD); + spin_unlock(&clockman->regs_lock); + + /* Wait for the PLL to lock. */ + timeout = ktime_add_ns(ktime_get(), LOCK_TIMEOUT_NS); + while (!(clockman_read(clockman, data->cs_reg) & PLL_CS_LOCK)) { + if (ktime_after(ktime_get(), timeout)) { + dev_err(clockman->dev, "%s: can't lock PLL\n", + clk_hw_get_name(hw)); + return -ETIMEDOUT; + } + cpu_relax(); + } + + return 0; +} + +static void rp1_pll_core_off(struct clk_hw *hw) +{ + struct rp1_pll_core *pll_core = container_of(hw, struct rp1_pll_core, hw); + struct rp1_clockman *clockman = pll_core->clockman; + const struct rp1_pll_core_data *data = pll_core->data; + + spin_lock(&clockman->regs_lock); + clockman_write(clockman, data->pwr_reg, 0); + spin_unlock(&clockman->regs_lock); +} + +static inline unsigned long get_pll_core_divider(struct clk_hw *hw, + unsigned long rate, + unsigned long parent_rate, + u32 *div_int, u32 *div_frac) +{ + unsigned long calc_rate; + u32 fbdiv_int, fbdiv_frac; + u64 div_fp64; /* 32.32 fixed point fraction. */ + + /* Factor of reference clock to VCO frequency. */ + div_fp64 = (u64)(rate) << 32; + div_fp64 = DIV_U64_NEAREST(div_fp64, parent_rate); + + /* Round the fractional component at 24 bits. */ + div_fp64 += 1 << (32 - 24 - 1); + + fbdiv_int = div_fp64 >> 32; + fbdiv_frac = (div_fp64 >> (32 - 24)) & 0xffffff; + + calc_rate = + ((u64)parent_rate * (((u64)fbdiv_int << 24) + fbdiv_frac) + (1 << 23)) >> 24; + + *div_int = fbdiv_int; + *div_frac = fbdiv_frac; + + return calc_rate; +} + +static int rp1_pll_core_set_rate(struct clk_hw *hw, + unsigned long rate, unsigned long parent_rate) +{ + struct rp1_pll_core *pll_core = container_of(hw, struct rp1_pll_core, hw); + struct rp1_clockman *clockman = pll_core->clockman; + const struct rp1_pll_core_data *data = pll_core->data; + unsigned long calc_rate; + u32 fbdiv_int, fbdiv_frac; + + // todo: is this needed?? + //rp1_pll_off(hw); + + /* Disable dividers to start with. */ + spin_lock(&clockman->regs_lock); + clockman_write(clockman, data->fbdiv_int_reg, 0); + clockman_write(clockman, data->fbdiv_frac_reg, 0); + spin_unlock(&clockman->regs_lock); + + calc_rate = get_pll_core_divider(hw, rate, parent_rate, + &fbdiv_int, &fbdiv_frac); + + spin_lock(&clockman->regs_lock); + clockman_write(clockman, data->pwr_reg, fbdiv_frac ? 0 : PLL_PWR_DSMPD); + clockman_write(clockman, data->fbdiv_int_reg, fbdiv_int); + clockman_write(clockman, data->fbdiv_frac_reg, fbdiv_frac); + spin_unlock(&clockman->regs_lock); + + /* Check that reference frequency is no greater than VCO / 16. */ + BUG_ON(parent_rate > (rate / 16)); + + pll_core->cached_rate = calc_rate; + + spin_lock(&clockman->regs_lock); + /* Don't need to divide ref unless parent_rate > (output freq / 16) */ + clockman_write(clockman, data->cs_reg, + clockman_read(clockman, data->cs_reg) | + (1 << PLL_CS_REFDIV_SHIFT)); + spin_unlock(&clockman->regs_lock); + + return 0; +} + +static unsigned long rp1_pll_core_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct rp1_pll_core *pll_core = container_of(hw, struct rp1_pll_core, hw); + struct rp1_clockman *clockman = pll_core->clockman; + const struct rp1_pll_core_data *data = pll_core->data; + u32 fbdiv_int, fbdiv_frac; + unsigned long calc_rate; + + fbdiv_int = clockman_read(clockman, data->fbdiv_int_reg); + fbdiv_frac = clockman_read(clockman, data->fbdiv_frac_reg); + calc_rate = + ((u64)parent_rate * (((u64)fbdiv_int << 24) + fbdiv_frac) + (1 << 23)) >> 24; + + return calc_rate; +} + +static long rp1_pll_core_round_rate(struct clk_hw *hw, unsigned long rate, + unsigned long *parent_rate) +{ + u32 fbdiv_int, fbdiv_frac; + long calc_rate; + + calc_rate = get_pll_core_divider(hw, rate, *parent_rate, + &fbdiv_int, &fbdiv_frac); + return calc_rate; +} + +static void rp1_pll_core_debug_init(struct clk_hw *hw, struct dentry *dentry) +{ + struct rp1_pll_core *pll_core = container_of(hw, struct rp1_pll_core, hw); + struct rp1_clockman *clockman = pll_core->clockman; + const struct rp1_pll_core_data *data = pll_core->data; + struct debugfs_reg32 *regs; + + regs = devm_kcalloc(clockman->dev, 4, sizeof(*regs), GFP_KERNEL); + if (!regs) + return; + + regs[0].name = "cs"; + regs[0].offset = data->cs_reg; + regs[1].name = "pwr"; + regs[1].offset = data->pwr_reg; + regs[2].name = "fbdiv_int"; + regs[2].offset = data->fbdiv_int_reg; + regs[3].name = "fbdiv_frac"; + regs[3].offset = data->fbdiv_frac_reg; + + rp1_debugfs_regset(clockman, 0, regs, 4, dentry); +} + +static void get_pll_prim_dividers(unsigned long rate, unsigned long parent_rate, + u32 *divider1, u32 *divider2) +{ + unsigned int div1, div2; + unsigned int best_div1 = 7, best_div2 = 7; + unsigned long best_rate_diff = + ABS_DIFF(DIV_ROUND_CLOSEST(parent_rate, best_div1 * best_div2), rate); + long rate_diff, calc_rate; + + for (div1 = 1; div1 <= 7; div1++) { + for (div2 = 1; div2 <= div1; div2++) { + calc_rate = DIV_ROUND_CLOSEST(parent_rate, div1 * div2); + rate_diff = ABS_DIFF(calc_rate, rate); + + if (calc_rate == rate) { + best_div1 = div1; + best_div2 = div2; + goto done; + } else if (rate_diff < best_rate_diff) { + best_div1 = div1; + best_div2 = div2; + best_rate_diff = rate_diff; + } + } + } + +done: + *divider1 = best_div1; + *divider2 = best_div2; +} + +static int rp1_pll_set_rate(struct clk_hw *hw, + unsigned long rate, unsigned long parent_rate) +{ + struct rp1_pll *pll = container_of(hw, struct rp1_pll, hw); + struct rp1_clockman *clockman = pll->clockman; + const struct rp1_pll_data *data = pll->data; + u32 prim, prim_div1, prim_div2; + + get_pll_prim_dividers(rate, parent_rate, &prim_div1, &prim_div2); + + spin_lock(&clockman->regs_lock); + prim = clockman_read(clockman, data->ctrl_reg); + prim = set_register_field(prim, prim_div1, PLL_PRIM_DIV1_MASK, + PLL_PRIM_DIV1_SHIFT); + prim = set_register_field(prim, prim_div2, PLL_PRIM_DIV2_MASK, + PLL_PRIM_DIV2_SHIFT); + clockman_write(clockman, data->ctrl_reg, prim); + spin_unlock(&clockman->regs_lock); + +#ifdef MEASURE_CLOCK_RATE + clockman_measure_clock(clockman, data->name, data->fc0_src); +#endif + return 0; +} + +static unsigned long rp1_pll_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct rp1_pll *pll = container_of(hw, struct rp1_pll, hw); + struct rp1_clockman *clockman = pll->clockman; + const struct rp1_pll_data *data = pll->data; + u32 prim, prim_div1, prim_div2; + + prim = clockman_read(clockman, data->ctrl_reg); + prim_div1 = (prim & PLL_PRIM_DIV1_MASK) >> PLL_PRIM_DIV1_SHIFT; + prim_div2 = (prim & PLL_PRIM_DIV2_MASK) >> PLL_PRIM_DIV2_SHIFT; + + if (!prim_div1 || !prim_div2) { + dev_err(clockman->dev, "%s: (%s) zero divider value\n", + __func__, data->name); + return 0; + } + + return DIV_ROUND_CLOSEST(parent_rate, prim_div1 * prim_div2); +} + +static long rp1_pll_round_rate(struct clk_hw *hw, unsigned long rate, + unsigned long *parent_rate) +{ + const struct rp1_clk_change *chg = &rp1_clk_chg_tree[1]; + u32 div1, div2; + + if (chg->hw == hw && chg->new_rate == rate) + *parent_rate = chg[1].new_rate; + + get_pll_prim_dividers(rate, *parent_rate, &div1, &div2); + + return DIV_ROUND_CLOSEST(*parent_rate, div1 * div2); +} + +static void rp1_pll_debug_init(struct clk_hw *hw, + struct dentry *dentry) +{ + struct rp1_pll *pll = container_of(hw, struct rp1_pll, hw); + struct rp1_clockman *clockman = pll->clockman; + const struct rp1_pll_data *data = pll->data; + struct debugfs_reg32 *regs; + + regs = devm_kcalloc(clockman->dev, 1, sizeof(*regs), GFP_KERNEL); + if (!regs) + return; + + regs[0].name = "prim"; + regs[0].offset = data->ctrl_reg; + + rp1_debugfs_regset(clockman, 0, regs, 1, dentry); +} + +static int rp1_pll_ph_is_on(struct clk_hw *hw) +{ + struct rp1_pll_ph *pll = container_of(hw, struct rp1_pll_ph, hw); + struct rp1_clockman *clockman = pll->clockman; + const struct rp1_pll_ph_data *data = pll->data; + + return !!(clockman_read(clockman, data->ph_reg) & PLL_PH_EN); +} + +static int rp1_pll_ph_on(struct clk_hw *hw) +{ + struct rp1_pll_ph *pll_ph = container_of(hw, struct rp1_pll_ph, hw); + struct rp1_clockman *clockman = pll_ph->clockman; + const struct rp1_pll_ph_data *data = pll_ph->data; + u32 ph_reg; + + /* todo: ensure pri/sec is enabled! */ + spin_lock(&clockman->regs_lock); + ph_reg = clockman_read(clockman, data->ph_reg); + ph_reg |= data->phase << PLL_PH_PHASE_SHIFT; + ph_reg |= PLL_PH_EN; + clockman_write(clockman, data->ph_reg, ph_reg); + spin_unlock(&clockman->regs_lock); + +#ifdef MEASURE_CLOCK_RATE + clockman_measure_clock(clockman, data->name, data->fc0_src); +#endif + return 0; +} + +static void rp1_pll_ph_off(struct clk_hw *hw) +{ + struct rp1_pll_ph *pll_ph = container_of(hw, struct rp1_pll_ph, hw); + struct rp1_clockman *clockman = pll_ph->clockman; + const struct rp1_pll_ph_data *data = pll_ph->data; + + spin_lock(&clockman->regs_lock); + clockman_write(clockman, data->ph_reg, + clockman_read(clockman, data->ph_reg) & ~PLL_PH_EN); + spin_unlock(&clockman->regs_lock); +} + +static int rp1_pll_ph_set_rate(struct clk_hw *hw, + unsigned long rate, unsigned long parent_rate) +{ + struct rp1_pll_ph *pll_ph = container_of(hw, struct rp1_pll_ph, hw); + const struct rp1_pll_ph_data *data = pll_ph->data; + struct rp1_clockman *clockman = pll_ph->clockman; + + /* Nothing really to do here! */ + WARN_ON(data->fixed_divider != 1 && data->fixed_divider != 2); + WARN_ON(rate != parent_rate / data->fixed_divider); + +#ifdef MEASURE_CLOCK_RATE + if (rp1_pll_ph_is_on(hw)) + clockman_measure_clock(clockman, data->name, data->fc0_src); +#endif + return 0; +} + +static unsigned long rp1_pll_ph_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct rp1_pll_ph *pll_ph = container_of(hw, struct rp1_pll_ph, hw); + const struct rp1_pll_ph_data *data = pll_ph->data; + + return parent_rate / data->fixed_divider; +} + +static long rp1_pll_ph_round_rate(struct clk_hw *hw, unsigned long rate, + unsigned long *parent_rate) +{ + struct rp1_pll_ph *pll_ph = container_of(hw, struct rp1_pll_ph, hw); + const struct rp1_pll_ph_data *data = pll_ph->data; + + return *parent_rate / data->fixed_divider; +} + +static void rp1_pll_ph_debug_init(struct clk_hw *hw, + struct dentry *dentry) +{ + struct rp1_pll_ph *pll_ph = container_of(hw, struct rp1_pll_ph, hw); + const struct rp1_pll_ph_data *data = pll_ph->data; + struct rp1_clockman *clockman = pll_ph->clockman; + struct debugfs_reg32 *regs; + + regs = devm_kcalloc(clockman->dev, 1, sizeof(*regs), GFP_KERNEL); + if (!regs) + return; + + regs[0].name = "ph_reg"; + regs[0].offset = data->ph_reg; + + rp1_debugfs_regset(clockman, 0, regs, 1, dentry); +} + +static int rp1_pll_divider_is_on(struct clk_hw *hw) +{ + struct rp1_pll *divider = container_of(hw, struct rp1_pll, div.hw); + struct rp1_clockman *clockman = divider->clockman; + const struct rp1_pll_data *data = divider->data; + + return !(clockman_read(clockman, data->ctrl_reg) & PLL_SEC_RST); +} + +static int rp1_pll_divider_on(struct clk_hw *hw) +{ + struct rp1_pll *divider = container_of(hw, struct rp1_pll, div.hw); + struct rp1_clockman *clockman = divider->clockman; + const struct rp1_pll_data *data = divider->data; + + spin_lock(&clockman->regs_lock); + /* Check the implementation bit is set! */ + WARN_ON(!(clockman_read(clockman, data->ctrl_reg) & PLL_SEC_IMPL)); + clockman_write(clockman, data->ctrl_reg, + clockman_read(clockman, data->ctrl_reg) & ~PLL_SEC_RST); + spin_unlock(&clockman->regs_lock); + +#ifdef MEASURE_CLOCK_RATE + clockman_measure_clock(clockman, data->name, data->fc0_src); +#endif + return 0; +} + +static void rp1_pll_divider_off(struct clk_hw *hw) +{ + struct rp1_pll *divider = container_of(hw, struct rp1_pll, div.hw); + struct rp1_clockman *clockman = divider->clockman; + const struct rp1_pll_data *data = divider->data; + + spin_lock(&clockman->regs_lock); + clockman_write(clockman, data->ctrl_reg, PLL_SEC_RST); + spin_unlock(&clockman->regs_lock); +} + +static int rp1_pll_divider_set_rate(struct clk_hw *hw, + unsigned long rate, + unsigned long parent_rate) +{ + struct rp1_pll *divider = container_of(hw, struct rp1_pll, div.hw); + struct rp1_clockman *clockman = divider->clockman; + const struct rp1_pll_data *data = divider->data; + u32 div, sec; + + div = DIV_ROUND_UP_ULL(parent_rate, rate); + div = clamp(div, 8u, 19u); + + spin_lock(&clockman->regs_lock); + sec = clockman_read(clockman, data->ctrl_reg); + sec = set_register_field(sec, div, PLL_SEC_DIV_MASK, PLL_SEC_DIV_SHIFT); + + /* Must keep the divider in reset to change the value. */ + sec |= PLL_SEC_RST; + clockman_write(clockman, data->ctrl_reg, sec); + + // todo: must sleep 10 pll vco cycles + sec &= ~PLL_SEC_RST; + clockman_write(clockman, data->ctrl_reg, sec); + spin_unlock(&clockman->regs_lock); + +#ifdef MEASURE_CLOCK_RATE + if (rp1_pll_divider_is_on(hw)) + clockman_measure_clock(clockman, data->name, data->fc0_src); +#endif + return 0; +} + +static unsigned long rp1_pll_divider_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + return clk_divider_ops.recalc_rate(hw, parent_rate); +} + +static long rp1_pll_divider_round_rate(struct clk_hw *hw, + unsigned long rate, + unsigned long *parent_rate) +{ + return clk_divider_ops.round_rate(hw, rate, parent_rate); +} + +static void rp1_pll_divider_debug_init(struct clk_hw *hw, struct dentry *dentry) +{ + struct rp1_pll *divider = container_of(hw, struct rp1_pll, div.hw); + struct rp1_clockman *clockman = divider->clockman; + const struct rp1_pll_data *data = divider->data; + struct debugfs_reg32 *regs; + + regs = devm_kcalloc(clockman->dev, 1, sizeof(*regs), GFP_KERNEL); + if (!regs) + return; + + regs[0].name = "sec"; + regs[0].offset = data->ctrl_reg; + + rp1_debugfs_regset(clockman, 0, regs, 1, dentry); +} + +static int rp1_clock_is_on(struct clk_hw *hw) +{ + struct rp1_clock *clock = container_of(hw, struct rp1_clock, hw); + struct rp1_clockman *clockman = clock->clockman; + const struct rp1_clock_data *data = clock->data; + + return !!(clockman_read(clockman, data->ctrl_reg) & CLK_CTRL_ENABLE); +} + +static unsigned long rp1_clock_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct rp1_clock *clock = container_of(hw, struct rp1_clock, hw); + struct rp1_clockman *clockman = clock->clockman; + const struct rp1_clock_data *data = clock->data; + u64 calc_rate; + u64 div; + + u32 frac; + + div = clockman_read(clockman, data->div_int_reg); + frac = (data->div_frac_reg != 0) ? + clockman_read(clockman, data->div_frac_reg) : 0; + + /* If the integer portion of the divider is 0, treat it as 2^16 */ + if (!div) + div = 1 << 16; + + div = (div << CLK_DIV_FRAC_BITS) | (frac >> (32 - CLK_DIV_FRAC_BITS)); + + calc_rate = (u64)parent_rate << CLK_DIV_FRAC_BITS; + calc_rate = div64_u64(calc_rate, div); + + return calc_rate; +} + +static int rp1_clock_on(struct clk_hw *hw) +{ + struct rp1_clock *clock = container_of(hw, struct rp1_clock, hw); + struct rp1_clockman *clockman = clock->clockman; + const struct rp1_clock_data *data = clock->data; + + spin_lock(&clockman->regs_lock); + clockman_write(clockman, data->ctrl_reg, + clockman_read(clockman, data->ctrl_reg) | CLK_CTRL_ENABLE); + /* If this is a GPCLK, turn on the output-enable */ + if (data->oe_mask) + clockman_write(clockman, GPCLK_OE_CTRL, + clockman_read(clockman, GPCLK_OE_CTRL) | data->oe_mask); + spin_unlock(&clockman->regs_lock); + +#ifdef MEASURE_CLOCK_RATE + clockman_measure_clock(clockman, data->name, data->fc0_src); +#endif + return 0; +} + +static void rp1_clock_off(struct clk_hw *hw) +{ + struct rp1_clock *clock = container_of(hw, struct rp1_clock, hw); + struct rp1_clockman *clockman = clock->clockman; + const struct rp1_clock_data *data = clock->data; + + spin_lock(&clockman->regs_lock); + clockman_write(clockman, data->ctrl_reg, + clockman_read(clockman, data->ctrl_reg) & ~CLK_CTRL_ENABLE); + /* If this is a GPCLK, turn off the output-enable */ + if (data->oe_mask) + clockman_write(clockman, GPCLK_OE_CTRL, + clockman_read(clockman, GPCLK_OE_CTRL) & ~data->oe_mask); + spin_unlock(&clockman->regs_lock); +} + +static u32 rp1_clock_choose_div(unsigned long rate, unsigned long parent_rate, + const struct rp1_clock_data *data) +{ + u64 div; + + /* + * Due to earlier rounding, calculated parent_rate may differ from + * expected value. Don't fail on a small discrepancy near unity divide. + */ + if (!rate || rate > parent_rate + (parent_rate >> CLK_DIV_FRAC_BITS)) + return 0; + + /* + * Always express div in fixed-point format for fractional division; + * If no fractional divider is present, the fraction part will be zero. + */ + if (data->div_frac_reg) { + div = (u64)parent_rate << CLK_DIV_FRAC_BITS; + div = DIV_U64_NEAREST(div, rate); + } else { + div = DIV_U64_NEAREST(parent_rate, rate); + div <<= CLK_DIV_FRAC_BITS; + } + + div = clamp(div, + 1ull << CLK_DIV_FRAC_BITS, + (u64)data->div_int_max << CLK_DIV_FRAC_BITS); + + return div; +} + +static u8 rp1_clock_get_parent(struct clk_hw *hw) +{ + struct rp1_clock *clock = container_of(hw, struct rp1_clock, hw); + struct rp1_clockman *clockman = clock->clockman; + const struct rp1_clock_data *data = clock->data; + u32 sel, ctrl; + u8 parent; + + /* Sel is one-hot, so find the first bit set */ + sel = clockman_read(clockman, data->sel_reg); + parent = ffs(sel) - 1; + + /* sel == 0 implies the parent clock is not enabled yet. */ + if (!sel) { + /* Read the clock src from the CTRL register instead */ + ctrl = clockman_read(clockman, data->ctrl_reg); + parent = (ctrl & data->clk_src_mask) >> CLK_CTRL_SRC_SHIFT; + } + + if (parent >= data->num_std_parents) + parent = AUX_SEL; + + if (parent == AUX_SEL) { + /* + * Clock parent is an auxiliary source, so get the parent from + * the AUXSRC register field. + */ + ctrl = clockman_read(clockman, data->ctrl_reg); + parent = (ctrl & CLK_CTRL_AUXSRC_MASK) >> CLK_CTRL_AUXSRC_SHIFT; + parent += data->num_std_parents; + } + + return parent; +} + +static int rp1_clock_set_parent(struct clk_hw *hw, u8 index) +{ + struct rp1_clock *clock = container_of(hw, struct rp1_clock, hw); + struct rp1_clockman *clockman = clock->clockman; + const struct rp1_clock_data *data = clock->data; + u32 ctrl, sel; + + spin_lock(&clockman->regs_lock); + ctrl = clockman_read(clockman, data->ctrl_reg); + + if (index >= data->num_std_parents) { + /* This is an aux source request */ + if (index >= data->num_std_parents + data->num_aux_parents) + return -EINVAL; + + /* Select parent from aux list */ + ctrl = set_register_field(ctrl, index - data->num_std_parents, + CLK_CTRL_AUXSRC_MASK, + CLK_CTRL_AUXSRC_SHIFT); + /* Set src to aux list */ + ctrl = set_register_field(ctrl, AUX_SEL, data->clk_src_mask, + CLK_CTRL_SRC_SHIFT); + } else { + ctrl = set_register_field(ctrl, index, data->clk_src_mask, + CLK_CTRL_SRC_SHIFT); + } + + clockman_write(clockman, data->ctrl_reg, ctrl); + spin_unlock(&clockman->regs_lock); + + sel = rp1_clock_get_parent(hw); + WARN(sel != index, "(%s): Parent index req %u returned back %u\n", + data->name, index, sel); + + return 0; +} + +static int rp1_clock_set_rate_and_parent(struct clk_hw *hw, + unsigned long rate, + unsigned long parent_rate, + u8 parent) +{ + struct rp1_clock *clock = container_of(hw, struct rp1_clock, hw); + struct rp1_clockman *clockman = clock->clockman; + const struct rp1_clock_data *data = clock->data; + u32 div = rp1_clock_choose_div(rate, parent_rate, data); + + WARN(rate > 4000000000ll, "rate is -ve (%d)\n", (int)rate); + + if (WARN(!div, + "clk divider calculated as 0! (%s, rate %ld, parent rate %ld)\n", + data->name, rate, parent_rate)) + div = 1 << CLK_DIV_FRAC_BITS; + + spin_lock(&clockman->regs_lock); + + clockman_write(clockman, data->div_int_reg, div >> CLK_DIV_FRAC_BITS); + if (data->div_frac_reg) + clockman_write(clockman, data->div_frac_reg, div << (32 - CLK_DIV_FRAC_BITS)); + + spin_unlock(&clockman->regs_lock); + + if (parent != 0xff) + rp1_clock_set_parent(hw, parent); + +#ifdef MEASURE_CLOCK_RATE + if (rp1_clock_is_on(hw)) + clockman_measure_clock(clockman, data->name, data->fc0_src); +#endif + return 0; +} + +static int rp1_clock_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + return rp1_clock_set_rate_and_parent(hw, rate, parent_rate, 0xff); +} + +static unsigned long calc_core_pll_rate(struct clk_hw *pll_hw, + unsigned long target_rate, + int *pdiv_prim, int *pdiv_clk) +{ + static const int prim_divs[] = { + 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, + 18, 20, 21, 24, 25, 28, 30, 35, 36, 42, 49, + }; + const unsigned long xosc_rate = clk_hw_get_rate(clk_xosc); + const unsigned long core_max = 2400000000; + const unsigned long core_min = xosc_rate * 16; + unsigned long best_rate = core_max + 1; + int best_div_prim = 1, best_div_clk = 1; + unsigned long core_rate = 0; + int div_int, div_frac; + u64 div; + int i; + + /* Given the target rate, choose a set of divisors/multipliers */ + for (i = 0; i < ARRAY_SIZE(prim_divs); i++) { + int div_prim = prim_divs[i]; + int div_clk; + + for (div_clk = 1; div_clk <= 256; div_clk++) { + core_rate = target_rate * div_clk * div_prim; + if (core_rate >= core_min) { + if (core_rate < best_rate) { + best_rate = core_rate; + best_div_prim = div_prim; + best_div_clk = div_clk; + } + break; + } + } + } + + if (best_rate < core_max) { + div = ((best_rate << 24) + xosc_rate / 2) / xosc_rate; + div_int = div >> 24; + div_frac = div % (1 << 24); + core_rate = (xosc_rate * ((div_int << 24) + div_frac) + (1 << 23)) >> 24; + } else { + core_rate = 0; + } + + if (pdiv_prim) + *pdiv_prim = best_div_prim; + if (pdiv_clk) + *pdiv_clk = best_div_clk; + + return core_rate; +} + +static void rp1_clock_choose_div_and_prate(struct clk_hw *hw, + int parent_idx, + unsigned long rate, + unsigned long *prate, + unsigned long *calc_rate) +{ + struct rp1_clock *clock = container_of(hw, struct rp1_clock, hw); + const struct rp1_clock_data *data = clock->data; + struct clk_hw *parent; + u32 div; + u64 tmp; + int i; + + parent = clk_hw_get_parent_by_index(hw, parent_idx); + + for (i = 0; i < ARRAY_SIZE(rp1_clk_chg_tree); i++) { + const struct rp1_clk_change *chg = &rp1_clk_chg_tree[i]; + + if (chg->hw == hw && chg->new_rate == rate) { + if (i == 2) + *prate = clk_hw_get_rate(clk_xosc); + else if (parent == rp1_clk_chg_tree[i + 1].hw) + *prate = rp1_clk_chg_tree[i + 1].new_rate; + else + continue; + *calc_rate = chg->new_rate; + return; + } + } + + if (hw == clk_i2s && parent == clk_audio) { + unsigned long core_rate, audio_rate, i2s_rate; + int div_prim, div_clk; + + core_rate = calc_core_pll_rate(parent, rate, &div_prim, &div_clk); + audio_rate = DIV_NEAREST(core_rate, div_prim); + i2s_rate = DIV_NEAREST(audio_rate, div_clk); + rp1_clk_chg_tree[2].hw = clk_hw_get_parent(parent); + rp1_clk_chg_tree[2].new_rate = core_rate; + rp1_clk_chg_tree[1].hw = clk_audio; + rp1_clk_chg_tree[1].new_rate = audio_rate; + rp1_clk_chg_tree[0].hw = clk_i2s; + rp1_clk_chg_tree[0].new_rate = i2s_rate; + *prate = audio_rate; + *calc_rate = i2s_rate; + return; + } + + *prate = clk_hw_get_rate(parent); + div = rp1_clock_choose_div(rate, *prate, data); + + if (!div) { + *calc_rate = 0; + return; + } + + /* Recalculate to account for rounding errors */ + tmp = (u64)*prate << CLK_DIV_FRAC_BITS; + tmp = div_u64(tmp, div); + /* + * Prevent overclocks - if all parent choices result in + * a downstream clock in excess of the maximum, then the + * call to set the clock will fail. + */ + if (tmp > clock->data->max_freq) + *calc_rate = 0; + else + *calc_rate = tmp; +} + +static int rp1_clock_determine_rate(struct clk_hw *hw, + struct clk_rate_request *req) +{ + struct clk_hw *parent, *best_parent = NULL; + unsigned long best_rate = 0; + unsigned long best_prate = 0; + unsigned long best_rate_diff = ULONG_MAX; + unsigned long prate, calc_rate; + size_t i; + + /* + * If the NO_REPARENT flag is set, try to use existing parent. + */ + if ((clk_hw_get_flags(hw) & CLK_SET_RATE_NO_REPARENT)) { + i = rp1_clock_get_parent(hw); + parent = clk_hw_get_parent_by_index(hw, i); + if (parent) { + rp1_clock_choose_div_and_prate(hw, i, req->rate, &prate, + &calc_rate); + if (calc_rate > 0) { + req->best_parent_hw = parent; + req->best_parent_rate = prate; + req->rate = calc_rate; + return 0; + } + } + } + + /* + * Select parent clock that results in the closest rate (lower or + * higher) + */ + for (i = 0; i < clk_hw_get_num_parents(hw); i++) { + parent = clk_hw_get_parent_by_index(hw, i); + if (!parent) + continue; + + rp1_clock_choose_div_and_prate(hw, i, req->rate, &prate, + &calc_rate); + + if (ABS_DIFF(calc_rate, req->rate) < best_rate_diff) { + best_parent = parent; + best_prate = prate; + best_rate = calc_rate; + best_rate_diff = ABS_DIFF(calc_rate, req->rate); + + if (best_rate_diff == 0) + break; + } + } + + if (best_rate == 0) + return -EINVAL; + + req->best_parent_hw = best_parent; + req->best_parent_rate = best_prate; + req->rate = best_rate; + + return 0; +} + +static void rp1_clk_debug_init(struct clk_hw *hw, struct dentry *dentry) +{ + struct rp1_clock *clock = container_of(hw, struct rp1_clock, hw); + struct rp1_clockman *clockman = clock->clockman; + const struct rp1_clock_data *data = clock->data; + struct debugfs_reg32 *regs; + int i; + + regs = devm_kcalloc(clockman->dev, 4, sizeof(*regs), GFP_KERNEL); + if (!regs) + return; + + i = 0; + regs[i].name = "ctrl"; + regs[i++].offset = data->ctrl_reg; + regs[i].name = "div_int"; + regs[i++].offset = data->div_int_reg; + regs[i].name = "div_frac"; + regs[i++].offset = data->div_frac_reg; + regs[i].name = "sel"; + regs[i++].offset = data->sel_reg; + + rp1_debugfs_regset(clockman, 0, regs, i, dentry); +} + +static int rp1_varsrc_set_rate(struct clk_hw *hw, + unsigned long rate, unsigned long parent_rate) +{ + struct rp1_varsrc *varsrc = container_of(hw, struct rp1_varsrc, hw); + + /* + * "varsrc" exists purely to let clock dividers know the frequency + * of an externally-managed clock source (such as MIPI DSI byte-clock) + * which may change at run-time as a side-effect of some other driver. + */ + varsrc->rate = rate; + return 0; +} + +static unsigned long rp1_varsrc_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct rp1_varsrc *varsrc = container_of(hw, struct rp1_varsrc, hw); + + return varsrc->rate; +} + +static long rp1_varsrc_round_rate(struct clk_hw *hw, unsigned long rate, + unsigned long *parent_rate) +{ + return rate; +} + +static const struct clk_ops rp1_pll_core_ops = { + .is_prepared = rp1_pll_core_is_on, + .prepare = rp1_pll_core_on, + .unprepare = rp1_pll_core_off, + .set_rate = rp1_pll_core_set_rate, + .recalc_rate = rp1_pll_core_recalc_rate, + .round_rate = rp1_pll_core_round_rate, + .debug_init = rp1_pll_core_debug_init, +}; + +static const struct clk_ops rp1_pll_ops = { + .set_rate = rp1_pll_set_rate, + .recalc_rate = rp1_pll_recalc_rate, + .round_rate = rp1_pll_round_rate, + .debug_init = rp1_pll_debug_init, +}; + +static const struct clk_ops rp1_pll_ph_ops = { + .is_prepared = rp1_pll_ph_is_on, + .prepare = rp1_pll_ph_on, + .unprepare = rp1_pll_ph_off, + .set_rate = rp1_pll_ph_set_rate, + .recalc_rate = rp1_pll_ph_recalc_rate, + .round_rate = rp1_pll_ph_round_rate, + .debug_init = rp1_pll_ph_debug_init, +}; + +static const struct clk_ops rp1_pll_divider_ops = { + .is_prepared = rp1_pll_divider_is_on, + .prepare = rp1_pll_divider_on, + .unprepare = rp1_pll_divider_off, + .set_rate = rp1_pll_divider_set_rate, + .recalc_rate = rp1_pll_divider_recalc_rate, + .round_rate = rp1_pll_divider_round_rate, + .debug_init = rp1_pll_divider_debug_init, +}; + +static const struct clk_ops rp1_clk_ops = { + .is_prepared = rp1_clock_is_on, + .prepare = rp1_clock_on, + .unprepare = rp1_clock_off, + .recalc_rate = rp1_clock_recalc_rate, + .get_parent = rp1_clock_get_parent, + .set_parent = rp1_clock_set_parent, + .set_rate_and_parent = rp1_clock_set_rate_and_parent, + .set_rate = rp1_clock_set_rate, + .determine_rate = rp1_clock_determine_rate, + .debug_init = rp1_clk_debug_init, +}; + +static const struct clk_ops rp1_varsrc_ops = { + .set_rate = rp1_varsrc_set_rate, + .recalc_rate = rp1_varsrc_recalc_rate, + .round_rate = rp1_varsrc_round_rate, +}; + +static bool rp1_clk_is_claimed(const char *name); + +static struct clk_hw *rp1_register_pll_core(struct rp1_clockman *clockman, + const void *data) +{ + const struct rp1_pll_core_data *pll_core_data = data; + struct rp1_pll_core *pll_core; + struct clk_init_data init; + int ret; + + memset(&init, 0, sizeof(init)); + + /* All of the PLL cores derive from the external oscillator. */ + init.parent_names = &ref_clock; + init.num_parents = 1; + init.name = pll_core_data->name; + init.ops = &rp1_pll_core_ops; + init.flags = pll_core_data->flags | CLK_IGNORE_UNUSED | CLK_IS_CRITICAL; + + pll_core = kzalloc(sizeof(*pll_core), GFP_KERNEL); + if (!pll_core) + return NULL; + + pll_core->clockman = clockman; + pll_core->data = pll_core_data; + pll_core->hw.init = &init; + + ret = devm_clk_hw_register(clockman->dev, &pll_core->hw); + if (ret) { + kfree(pll_core); + return NULL; + } + + return &pll_core->hw; +} + +static struct clk_hw *rp1_register_pll(struct rp1_clockman *clockman, + const void *data) +{ + const struct rp1_pll_data *pll_data = data; + struct rp1_pll *pll; + struct clk_init_data init; + int ret; + + memset(&init, 0, sizeof(init)); + + init.parent_names = &pll_data->source_pll; + init.num_parents = 1; + init.name = pll_data->name; + init.ops = &rp1_pll_ops; + init.flags = pll_data->flags | CLK_IGNORE_UNUSED | CLK_IS_CRITICAL; + + pll = kzalloc(sizeof(*pll), GFP_KERNEL); + if (!pll) + return NULL; + + pll->clockman = clockman; + pll->data = pll_data; + pll->hw.init = &init; + + ret = devm_clk_hw_register(clockman->dev, &pll->hw); + if (ret) { + kfree(pll); + return NULL; + } + + return &pll->hw; +} + +static struct clk_hw *rp1_register_pll_ph(struct rp1_clockman *clockman, + const void *data) +{ + const struct rp1_pll_ph_data *ph_data = data; + struct rp1_pll_ph *ph; + struct clk_init_data init; + int ret; + + memset(&init, 0, sizeof(init)); + + /* All of the PLLs derive from the external oscillator. */ + init.parent_names = &ph_data->source_pll; + init.num_parents = 1; + init.name = ph_data->name; + init.ops = &rp1_pll_ph_ops; + init.flags = ph_data->flags | CLK_IGNORE_UNUSED; + + ph = kzalloc(sizeof(*ph), GFP_KERNEL); + if (!ph) + return NULL; + + ph->clockman = clockman; + ph->data = ph_data; + ph->hw.init = &init; + + ret = devm_clk_hw_register(clockman->dev, &ph->hw); + if (ret) { + kfree(ph); + return NULL; + } + + return &ph->hw; +} + +static struct clk_hw *rp1_register_pll_divider(struct rp1_clockman *clockman, + const void *data) +{ + const struct rp1_pll_data *divider_data = data; + struct rp1_pll *divider; + struct clk_init_data init; + int ret; + + memset(&init, 0, sizeof(init)); + + init.parent_names = ÷r_data->source_pll; + init.num_parents = 1; + init.name = divider_data->name; + init.ops = &rp1_pll_divider_ops; + init.flags = divider_data->flags | CLK_IGNORE_UNUSED; + + divider = devm_kzalloc(clockman->dev, sizeof(*divider), GFP_KERNEL); + if (!divider) + return NULL; + + divider->div.reg = clockman->regs + divider_data->ctrl_reg; + divider->div.shift = PLL_SEC_DIV_SHIFT; + divider->div.width = PLL_SEC_DIV_WIDTH; + divider->div.flags = CLK_DIVIDER_ROUND_CLOSEST; + divider->div.lock = &clockman->regs_lock; + divider->div.hw.init = &init; + divider->div.table = pll_sec_div_table; + + if (!rp1_clk_is_claimed(divider_data->source_pll)) + init.flags |= CLK_IS_CRITICAL; + if (!rp1_clk_is_claimed(divider_data->name)) + divider->div.flags |= CLK_IS_CRITICAL; + + divider->clockman = clockman; + divider->data = divider_data; + + ret = devm_clk_hw_register(clockman->dev, ÷r->div.hw); + if (ret) + return ERR_PTR(ret); + + return ÷r->div.hw; +} + +static struct clk_hw *rp1_register_clock(struct rp1_clockman *clockman, + const void *data) +{ + const struct rp1_clock_data *clock_data = data; + struct rp1_clock *clock; + struct clk_init_data init; + int ret; + + BUG_ON(MAX_CLK_PARENTS < + clock_data->num_std_parents + clock_data->num_aux_parents); + /* There must be a gap for the AUX selector */ + BUG_ON((clock_data->num_std_parents > AUX_SEL) && + strcmp("-", clock_data->parents[AUX_SEL])); + + memset(&init, 0, sizeof(init)); + init.parent_names = clock_data->parents; + init.num_parents = + clock_data->num_std_parents + clock_data->num_aux_parents; + init.name = clock_data->name; + init.flags = clock_data->flags | CLK_IGNORE_UNUSED; + init.ops = &rp1_clk_ops; + + clock = devm_kzalloc(clockman->dev, sizeof(*clock), GFP_KERNEL); + if (!clock) + return NULL; + + clock->clockman = clockman; + clock->data = clock_data; + clock->hw.init = &init; + + ret = devm_clk_hw_register(clockman->dev, &clock->hw); + if (ret) + return ERR_PTR(ret); + + return &clock->hw; +} + +static struct clk_hw *rp1_register_varsrc(struct rp1_clockman *clockman, + const void *data) +{ + const char *name = *(char const * const *)data; + struct rp1_varsrc *clock; + struct clk_init_data init; + int ret; + + memset(&init, 0, sizeof(init)); + init.parent_names = &ref_clock; + init.num_parents = 1; + init.name = name; + init.flags = CLK_IGNORE_UNUSED; + init.ops = &rp1_varsrc_ops; + + clock = devm_kzalloc(clockman->dev, sizeof(*clock), GFP_KERNEL); + if (!clock) + return NULL; + + clock->clockman = clockman; + clock->hw.init = &init; + + ret = devm_clk_hw_register(clockman->dev, &clock->hw); + if (ret) + return ERR_PTR(ret); + + return &clock->hw; +} + +struct rp1_clk_desc { + struct clk_hw *(*clk_register)(struct rp1_clockman *clockman, + const void *data); + const void *data; +}; + +/* Assignment helper macros for different clock types. */ +#define _REGISTER(f, ...) { .clk_register = f, .data = __VA_ARGS__ } + +#define REGISTER_PLL_CORE(...) _REGISTER(&rp1_register_pll_core, \ + &(struct rp1_pll_core_data) \ + {__VA_ARGS__}) + +#define REGISTER_PLL(...) _REGISTER(&rp1_register_pll, \ + &(struct rp1_pll_data) \ + {__VA_ARGS__}) + +#define REGISTER_PLL_PH(...) _REGISTER(&rp1_register_pll_ph, \ + &(struct rp1_pll_ph_data) \ + {__VA_ARGS__}) + +#define REGISTER_PLL_DIV(...) _REGISTER(&rp1_register_pll_divider, \ + &(struct rp1_pll_data) \ + {__VA_ARGS__}) + +#define REGISTER_CLK(...) _REGISTER(&rp1_register_clock, \ + &(struct rp1_clock_data) \ + {__VA_ARGS__}) + +#define REGISTER_VARSRC(n) _REGISTER(&rp1_register_varsrc, &(const char *){n}) + +static const struct rp1_clk_desc clk_desc_array[] = { + [RP1_PLL_SYS_CORE] = REGISTER_PLL_CORE( + .name = "pll_sys_core", + .cs_reg = PLL_SYS_CS, + .pwr_reg = PLL_SYS_PWR, + .fbdiv_int_reg = PLL_SYS_FBDIV_INT, + .fbdiv_frac_reg = PLL_SYS_FBDIV_FRAC, + ), + + [RP1_PLL_AUDIO_CORE] = REGISTER_PLL_CORE( + .name = "pll_audio_core", + .cs_reg = PLL_AUDIO_CS, + .pwr_reg = PLL_AUDIO_PWR, + .fbdiv_int_reg = PLL_AUDIO_FBDIV_INT, + .fbdiv_frac_reg = PLL_AUDIO_FBDIV_FRAC, + ), + + [RP1_PLL_VIDEO_CORE] = REGISTER_PLL_CORE( + .name = "pll_video_core", + .cs_reg = PLL_VIDEO_CS, + .pwr_reg = PLL_VIDEO_PWR, + .fbdiv_int_reg = PLL_VIDEO_FBDIV_INT, + .fbdiv_frac_reg = PLL_VIDEO_FBDIV_FRAC, + ), + + [RP1_PLL_SYS] = REGISTER_PLL( + .name = "pll_sys", + .source_pll = "pll_sys_core", + .ctrl_reg = PLL_SYS_PRIM, + .fc0_src = FC_NUM(0, 2), + ), + + [RP1_PLL_AUDIO] = REGISTER_PLL( + .name = "pll_audio", + .source_pll = "pll_audio_core", + .ctrl_reg = PLL_AUDIO_PRIM, + .fc0_src = FC_NUM(4, 2), + .flags = CLK_SET_RATE_PARENT, + ), + + [RP1_PLL_VIDEO] = REGISTER_PLL( + .name = "pll_video", + .source_pll = "pll_video_core", + .ctrl_reg = PLL_VIDEO_PRIM, + .fc0_src = FC_NUM(3, 2), + ), + + [RP1_PLL_SYS_PRI_PH] = REGISTER_PLL_PH( + .name = "pll_sys_pri_ph", + .source_pll = "pll_sys", + .ph_reg = PLL_SYS_PRIM, + .fixed_divider = 2, + .phase = RP1_PLL_PHASE_0, + .fc0_src = FC_NUM(1, 2), + ), + + [RP1_PLL_AUDIO_PRI_PH] = REGISTER_PLL_PH( + .name = "pll_audio_pri_ph", + .source_pll = "pll_audio", + .ph_reg = PLL_AUDIO_PRIM, + .fixed_divider = 2, + .phase = RP1_PLL_PHASE_0, + .fc0_src = FC_NUM(5, 1), + ), + + [RP1_PLL_VIDEO_PRI_PH] = REGISTER_PLL_PH( + .name = "pll_video_pri_ph", + .source_pll = "pll_video", + .ph_reg = PLL_VIDEO_PRIM, + .fixed_divider = 2, + .phase = RP1_PLL_PHASE_0, + .fc0_src = FC_NUM(4, 3), + ), + + [RP1_PLL_SYS_SEC] = REGISTER_PLL_DIV( + .name = "pll_sys_sec", + .source_pll = "pll_sys_core", + .ctrl_reg = PLL_SYS_SEC, + .fc0_src = FC_NUM(2, 2), + ), + + [RP1_PLL_AUDIO_SEC] = REGISTER_PLL_DIV( + .name = "pll_audio_sec", + .source_pll = "pll_audio_core", + .ctrl_reg = PLL_AUDIO_SEC, + .fc0_src = FC_NUM(6, 2), + ), + + [RP1_PLL_VIDEO_SEC] = REGISTER_PLL_DIV( + .name = "pll_video_sec", + .source_pll = "pll_video_core", + .ctrl_reg = PLL_VIDEO_SEC, + .fc0_src = FC_NUM(5, 3), + ), + + [RP1_PLL_AUDIO_TERN] = REGISTER_PLL_DIV( + .name = "pll_audio_tern", + .source_pll = "pll_audio_core", + .ctrl_reg = PLL_AUDIO_TERN, + .fc0_src = FC_NUM(6, 2), + ), + + [RP1_CLK_SYS] = REGISTER_CLK( + .name = "clk_sys", + .parents = {"xosc", "-", "pll_sys"}, + .num_std_parents = 3, + .num_aux_parents = 0, + .ctrl_reg = CLK_SYS_CTRL, + .div_int_reg = CLK_SYS_DIV_INT, + .sel_reg = CLK_SYS_SEL, + .div_int_max = DIV_INT_24BIT_MAX, + .max_freq = 200 * MHz, + .fc0_src = FC_NUM(0, 4), + .clk_src_mask = 0x3, + ), + + [RP1_CLK_SLOW_SYS] = REGISTER_CLK( + .name = "clk_slow_sys", + .parents = {"xosc"}, + .num_std_parents = 1, + .num_aux_parents = 0, + .ctrl_reg = CLK_SLOW_SYS_CTRL, + .div_int_reg = CLK_SLOW_SYS_DIV_INT, + .sel_reg = CLK_SLOW_SYS_SEL, + .div_int_max = DIV_INT_8BIT_MAX, + .max_freq = 50 * MHz, + .fc0_src = FC_NUM(1, 4), + .clk_src_mask = 0x1, + ), + + [RP1_CLK_UART] = REGISTER_CLK( + .name = "clk_uart", + .parents = {"pll_sys_pri_ph", + "pll_video", + "xosc", + "clksrc_gp0", + "clksrc_gp1", + "clksrc_gp2", + "clksrc_gp3", + "clksrc_gp4", + "clksrc_gp5"}, + .num_std_parents = 0, + .num_aux_parents = 9, + .ctrl_reg = CLK_UART_CTRL, + .div_int_reg = CLK_UART_DIV_INT, + .sel_reg = CLK_UART_SEL, + .div_int_max = DIV_INT_8BIT_MAX, + .max_freq = 100 * MHz, + .fc0_src = FC_NUM(6, 7), + ), + + [RP1_CLK_ETH] = REGISTER_CLK( + .name = "clk_eth", + .parents = {"pll_sys_sec", + "pll_sys", + "pll_video_sec", + "clksrc_gp0", + "clksrc_gp1", + "clksrc_gp2", + "clksrc_gp3", + "clksrc_gp4", + "clksrc_gp5"}, + .num_std_parents = 0, + .num_aux_parents = 9, + .ctrl_reg = CLK_ETH_CTRL, + .div_int_reg = CLK_ETH_DIV_INT, + .sel_reg = CLK_ETH_SEL, + .div_int_max = DIV_INT_8BIT_MAX, + .max_freq = 125 * MHz, + .fc0_src = FC_NUM(4, 6), + ), + + [RP1_CLK_PWM0] = REGISTER_CLK( + .name = "clk_pwm0", + .parents = {"", // "pll_audio_pri_ph", + "pll_video_sec", + "xosc", + "clksrc_gp0", + "clksrc_gp1", + "clksrc_gp2", + "clksrc_gp3", + "clksrc_gp4", + "clksrc_gp5"}, + .num_std_parents = 0, + .num_aux_parents = 9, + .ctrl_reg = CLK_PWM0_CTRL, + .div_int_reg = CLK_PWM0_DIV_INT, + .div_frac_reg = CLK_PWM0_DIV_FRAC, + .sel_reg = CLK_PWM0_SEL, + .div_int_max = DIV_INT_16BIT_MAX, + .max_freq = 76800 * KHz, + .fc0_src = FC_NUM(0, 5), + ), + + [RP1_CLK_PWM1] = REGISTER_CLK( + .name = "clk_pwm1", + .parents = {"", // "pll_audio_pri_ph", + "pll_video_sec", + "xosc", + "clksrc_gp0", + "clksrc_gp1", + "clksrc_gp2", + "clksrc_gp3", + "clksrc_gp4", + "clksrc_gp5"}, + .num_std_parents = 0, + .num_aux_parents = 9, + .ctrl_reg = CLK_PWM1_CTRL, + .div_int_reg = CLK_PWM1_DIV_INT, + .div_frac_reg = CLK_PWM1_DIV_FRAC, + .sel_reg = CLK_PWM1_SEL, + .div_int_max = DIV_INT_16BIT_MAX, + .max_freq = 76800 * KHz, + .fc0_src = FC_NUM(1, 5), + ), + + [RP1_CLK_AUDIO_IN] = REGISTER_CLK( + .name = "clk_audio_in", + .parents = {"", //"pll_audio", + "", //"pll_audio_pri_ph", + "", //"pll_audio_sec", + "pll_video_sec", + "xosc", + "clksrc_gp0", + "clksrc_gp1", + "clksrc_gp2", + "clksrc_gp3", + "clksrc_gp4", + "clksrc_gp5"}, + .num_std_parents = 0, + .num_aux_parents = 11, + .ctrl_reg = CLK_AUDIO_IN_CTRL, + .div_int_reg = CLK_AUDIO_IN_DIV_INT, + .sel_reg = CLK_AUDIO_IN_SEL, + .div_int_max = DIV_INT_8BIT_MAX, + .max_freq = 76800 * KHz, + .fc0_src = FC_NUM(2, 5), + ), + + [RP1_CLK_AUDIO_OUT] = REGISTER_CLK( + .name = "clk_audio_out", + .parents = {"", //"pll_audio", + "", //"pll_audio_sec", + "pll_video_sec", + "xosc", + "clksrc_gp0", + "clksrc_gp1", + "clksrc_gp2", + "clksrc_gp3", + "clksrc_gp4", + "clksrc_gp5"}, + .num_std_parents = 0, + .num_aux_parents = 10, + .ctrl_reg = CLK_AUDIO_OUT_CTRL, + .div_int_reg = CLK_AUDIO_OUT_DIV_INT, + .sel_reg = CLK_AUDIO_OUT_SEL, + .div_int_max = DIV_INT_8BIT_MAX, + .max_freq = 153600 * KHz, + .fc0_src = FC_NUM(3, 5), + ), + + [RP1_CLK_I2S] = REGISTER_CLK( + .name = "clk_i2s", + .parents = {"xosc", + "pll_audio", + "pll_audio_sec", + "clksrc_gp0", + "clksrc_gp1", + "clksrc_gp2", + "clksrc_gp3", + "clksrc_gp4", + "clksrc_gp5"}, + .num_std_parents = 0, + .num_aux_parents = 9, + .ctrl_reg = CLK_I2S_CTRL, + .div_int_reg = CLK_I2S_DIV_INT, + .sel_reg = CLK_I2S_SEL, + .div_int_max = DIV_INT_8BIT_MAX, + .max_freq = 50 * MHz, + .fc0_src = FC_NUM(4, 4), + .flags = CLK_SET_RATE_PARENT, + ), + + [RP1_CLK_MIPI0_CFG] = REGISTER_CLK( + .name = "clk_mipi0_cfg", + .parents = {"xosc"}, + .num_std_parents = 0, + .num_aux_parents = 1, + .ctrl_reg = CLK_MIPI0_CFG_CTRL, + .div_int_reg = CLK_MIPI0_CFG_DIV_INT, + .sel_reg = CLK_MIPI0_CFG_SEL, + .div_int_max = DIV_INT_8BIT_MAX, + .max_freq = 50 * MHz, + .fc0_src = FC_NUM(4, 5), + ), + + [RP1_CLK_MIPI1_CFG] = REGISTER_CLK( + .name = "clk_mipi1_cfg", + .parents = {"xosc"}, + .num_std_parents = 0, + .num_aux_parents = 1, + .ctrl_reg = CLK_MIPI1_CFG_CTRL, + .div_int_reg = CLK_MIPI1_CFG_DIV_INT, + .sel_reg = CLK_MIPI1_CFG_SEL, + .clk_src_mask = 1, + .div_int_max = DIV_INT_8BIT_MAX, + .max_freq = 50 * MHz, + .fc0_src = FC_NUM(5, 6), + ), + + [RP1_CLK_ETH_TSU] = REGISTER_CLK( + .name = "clk_eth_tsu", + .parents = {"xosc", + "pll_video_sec", + "clksrc_gp0", + "clksrc_gp1", + "clksrc_gp2", + "clksrc_gp3", + "clksrc_gp4", + "clksrc_gp5"}, + .num_std_parents = 0, + .num_aux_parents = 8, + .ctrl_reg = CLK_ETH_TSU_CTRL, + .div_int_reg = CLK_ETH_TSU_DIV_INT, + .sel_reg = CLK_ETH_TSU_SEL, + .div_int_max = DIV_INT_8BIT_MAX, + .max_freq = 50 * MHz, + .fc0_src = FC_NUM(5, 7), + ), + + [RP1_CLK_ADC] = REGISTER_CLK( + .name = "clk_adc", + .parents = {"xosc", + "", //"pll_audio_tern", + "clksrc_gp0", + "clksrc_gp1", + "clksrc_gp2", + "clksrc_gp3", + "clksrc_gp4", + "clksrc_gp5"}, + .num_std_parents = 0, + .num_aux_parents = 8, + .ctrl_reg = CLK_ADC_CTRL, + .div_int_reg = CLK_ADC_DIV_INT, + .sel_reg = CLK_ADC_SEL, + .div_int_max = DIV_INT_8BIT_MAX, + .max_freq = 50 * MHz, + .fc0_src = FC_NUM(5, 5), + ), + + [RP1_CLK_SDIO_TIMER] = REGISTER_CLK( + .name = "clk_sdio_timer", + .parents = {"xosc"}, + .num_std_parents = 0, + .num_aux_parents = 1, + .ctrl_reg = CLK_SDIO_TIMER_CTRL, + .div_int_reg = CLK_SDIO_TIMER_DIV_INT, + .sel_reg = CLK_SDIO_TIMER_SEL, + .div_int_max = DIV_INT_8BIT_MAX, + .max_freq = 50 * MHz, + .fc0_src = FC_NUM(3, 4), + ), + + [RP1_CLK_SDIO_ALT_SRC] = REGISTER_CLK( + .name = "clk_sdio_alt_src", + .parents = {"pll_sys"}, + .num_std_parents = 0, + .num_aux_parents = 1, + .ctrl_reg = CLK_SDIO_ALT_SRC_CTRL, + .div_int_reg = CLK_SDIO_ALT_SRC_DIV_INT, + .sel_reg = CLK_SDIO_ALT_SRC_SEL, + .div_int_max = DIV_INT_8BIT_MAX, + .max_freq = 200 * MHz, + .fc0_src = FC_NUM(5, 4), + ), + + [RP1_CLK_GP0] = REGISTER_CLK( + .name = "clk_gp0", + .parents = {"xosc", + "clksrc_gp1", + "clksrc_gp2", + "clksrc_gp3", + "clksrc_gp4", + "clksrc_gp5", + "pll_sys", + "", //"pll_audio", + "", + "", + "clk_i2s", + "clk_adc", + "", + "", + "", + "clk_sys"}, + .num_std_parents = 0, + .num_aux_parents = 16, + .oe_mask = BIT(0), + .ctrl_reg = CLK_GP0_CTRL, + .div_int_reg = CLK_GP0_DIV_INT, + .div_frac_reg = CLK_GP0_DIV_FRAC, + .sel_reg = CLK_GP0_SEL, + .div_int_max = DIV_INT_16BIT_MAX, + .max_freq = 100 * MHz, + .fc0_src = FC_NUM(0, 1), + ), + + [RP1_CLK_GP1] = REGISTER_CLK( + .name = "clk_gp1", + .parents = {"clk_sdio_timer", + "clksrc_gp0", + "clksrc_gp2", + "clksrc_gp3", + "clksrc_gp4", + "clksrc_gp5", + "pll_sys_pri_ph", + "", //"pll_audio_pri_ph", + "", + "", + "clk_adc", + "clk_dpi", + "clk_pwm0", + "", + "", + ""}, + .num_std_parents = 0, + .num_aux_parents = 16, + .oe_mask = BIT(1), + .ctrl_reg = CLK_GP1_CTRL, + .div_int_reg = CLK_GP1_DIV_INT, + .div_frac_reg = CLK_GP1_DIV_FRAC, + .sel_reg = CLK_GP1_SEL, + .div_int_max = DIV_INT_16BIT_MAX, + .max_freq = 100 * MHz, + .fc0_src = FC_NUM(1, 1), + ), + + [RP1_CLK_GP2] = REGISTER_CLK( + .name = "clk_gp2", + .parents = {"clk_sdio_alt_src", + "clksrc_gp0", + "clksrc_gp1", + "clksrc_gp3", + "clksrc_gp4", + "clksrc_gp5", + "pll_sys_sec", + "", //"pll_audio_sec", + "pll_video", + "clk_audio_in", + "clk_dpi", + "clk_pwm0", + "clk_pwm1", + "clk_mipi0_dpi", + "clk_mipi1_cfg", + "clk_sys"}, + .num_std_parents = 0, + .num_aux_parents = 16, + .oe_mask = BIT(2), + .ctrl_reg = CLK_GP2_CTRL, + .div_int_reg = CLK_GP2_DIV_INT, + .div_frac_reg = CLK_GP2_DIV_FRAC, + .sel_reg = CLK_GP2_SEL, + .div_int_max = DIV_INT_16BIT_MAX, + .max_freq = 100 * MHz, + .fc0_src = FC_NUM(2, 1), + ), + + [RP1_CLK_GP3] = REGISTER_CLK( + .name = "clk_gp3", + .parents = {"xosc", + "clksrc_gp0", + "clksrc_gp1", + "clksrc_gp2", + "clksrc_gp4", + "clksrc_gp5", + "", + "", + "pll_video_pri_ph", + "clk_audio_out", + "", + "", + "clk_mipi1_dpi", + "", + "", + ""}, + .num_std_parents = 0, + .num_aux_parents = 16, + .oe_mask = BIT(3), + .ctrl_reg = CLK_GP3_CTRL, + .div_int_reg = CLK_GP3_DIV_INT, + .div_frac_reg = CLK_GP3_DIV_FRAC, + .sel_reg = CLK_GP3_SEL, + .div_int_max = DIV_INT_16BIT_MAX, + .max_freq = 100 * MHz, + .fc0_src = FC_NUM(3, 1), + ), + + [RP1_CLK_GP4] = REGISTER_CLK( + .name = "clk_gp4", + .parents = {"xosc", + "clksrc_gp0", + "clksrc_gp1", + "clksrc_gp2", + "clksrc_gp3", + "clksrc_gp5", + "", //"pll_audio_tern", + "pll_video_sec", + "", + "", + "", + "clk_mipi0_cfg", + "clk_uart", + "", + "", + "clk_sys", + }, + .num_std_parents = 0, + .num_aux_parents = 16, + .oe_mask = BIT(4), + .ctrl_reg = CLK_GP4_CTRL, + .div_int_reg = CLK_GP4_DIV_INT, + .div_frac_reg = CLK_GP4_DIV_FRAC, + .sel_reg = CLK_GP4_SEL, + .div_int_max = DIV_INT_16BIT_MAX, + .max_freq = 100 * MHz, + .fc0_src = FC_NUM(4, 1), + ), + + [RP1_CLK_GP5] = REGISTER_CLK( + .name = "clk_gp5", + .parents = {"xosc", + "clksrc_gp0", + "clksrc_gp1", + "clksrc_gp2", + "clksrc_gp3", + "clksrc_gp4", + "", //"pll_audio_tern", + "pll_video_sec", + "clk_eth_tsu", + "", + "clk_vec", + "", + "", + "", + "", + ""}, + .num_std_parents = 0, + .num_aux_parents = 16, + .oe_mask = BIT(5), + .ctrl_reg = CLK_GP5_CTRL, + .div_int_reg = CLK_GP5_DIV_INT, + .div_frac_reg = CLK_GP5_DIV_FRAC, + .sel_reg = CLK_GP5_SEL, + .div_int_max = DIV_INT_16BIT_MAX, + .max_freq = 100 * MHz, + .fc0_src = FC_NUM(5, 1), + ), + + [RP1_CLK_VEC] = REGISTER_CLK( + .name = "clk_vec", + .parents = {"pll_sys_pri_ph", + "pll_video_sec", + "pll_video", + "clksrc_gp0", + "clksrc_gp1", + "clksrc_gp2", + "clksrc_gp3", + "clksrc_gp4"}, + .num_std_parents = 0, + .num_aux_parents = 8, /* XXX in fact there are more than 8 */ + .ctrl_reg = VIDEO_CLK_VEC_CTRL, + .div_int_reg = VIDEO_CLK_VEC_DIV_INT, + .sel_reg = VIDEO_CLK_VEC_SEL, + .flags = CLK_SET_RATE_NO_REPARENT, /* Let VEC driver set parent */ + .div_int_max = DIV_INT_8BIT_MAX, + .max_freq = 108 * MHz, + .fc0_src = FC_NUM(0, 6), + ), + + [RP1_CLK_DPI] = REGISTER_CLK( + .name = "clk_dpi", + .parents = {"pll_sys", + "pll_video_sec", + "pll_video", + "clksrc_gp0", + "clksrc_gp1", + "clksrc_gp2", + "clksrc_gp3", + "clksrc_gp4"}, + .num_std_parents = 0, + .num_aux_parents = 8, /* XXX in fact there are more than 8 */ + .ctrl_reg = VIDEO_CLK_DPI_CTRL, + .div_int_reg = VIDEO_CLK_DPI_DIV_INT, + .sel_reg = VIDEO_CLK_DPI_SEL, + .flags = CLK_SET_RATE_NO_REPARENT, /* Let DPI driver set parent */ + .div_int_max = DIV_INT_8BIT_MAX, + .max_freq = 200 * MHz, + .fc0_src = FC_NUM(1, 6), + ), + + [RP1_CLK_MIPI0_DPI] = REGISTER_CLK( + .name = "clk_mipi0_dpi", + .parents = {"pll_sys", + "pll_video_sec", + "pll_video", + "clksrc_mipi0_dsi_byteclk", + "clksrc_gp0", + "clksrc_gp1", + "clksrc_gp2", + "clksrc_gp3"}, + .num_std_parents = 0, + .num_aux_parents = 8, /* XXX in fact there are more than 8 */ + .ctrl_reg = VIDEO_CLK_MIPI0_DPI_CTRL, + .div_int_reg = VIDEO_CLK_MIPI0_DPI_DIV_INT, + .div_frac_reg = VIDEO_CLK_MIPI0_DPI_DIV_FRAC, + .sel_reg = VIDEO_CLK_MIPI0_DPI_SEL, + .flags = CLK_SET_RATE_NO_REPARENT, /* Let DSI driver set parent */ + .div_int_max = DIV_INT_8BIT_MAX, + .max_freq = 200 * MHz, + .fc0_src = FC_NUM(2, 6), + ), + + [RP1_CLK_MIPI1_DPI] = REGISTER_CLK( + .name = "clk_mipi1_dpi", + .parents = {"pll_sys", + "pll_video_sec", + "pll_video", + "clksrc_mipi1_dsi_byteclk", + "clksrc_gp0", + "clksrc_gp1", + "clksrc_gp2", + "clksrc_gp3"}, + .num_std_parents = 0, + .num_aux_parents = 8, /* XXX in fact there are more than 8 */ + .ctrl_reg = VIDEO_CLK_MIPI1_DPI_CTRL, + .div_int_reg = VIDEO_CLK_MIPI1_DPI_DIV_INT, + .div_frac_reg = VIDEO_CLK_MIPI1_DPI_DIV_FRAC, + .sel_reg = VIDEO_CLK_MIPI1_DPI_SEL, + .flags = CLK_SET_RATE_NO_REPARENT, /* Let DSI driver set parent */ + .div_int_max = DIV_INT_8BIT_MAX, + .max_freq = 200 * MHz, + .fc0_src = FC_NUM(3, 6), + ), + + [RP1_CLK_MIPI0_DSI_BYTECLOCK] = REGISTER_VARSRC("clksrc_mipi0_dsi_byteclk"), + [RP1_CLK_MIPI1_DSI_BYTECLOCK] = REGISTER_VARSRC("clksrc_mipi1_dsi_byteclk"), +}; + +static bool rp1_clk_claimed[ARRAY_SIZE(clk_desc_array)]; + +static bool rp1_clk_is_claimed(const char *name) +{ + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(clk_desc_array); i++) { + if (clk_desc_array[i].data) { + const char *clk_name = *(const char **)(clk_desc_array[i].data); + + if (!strcmp(name, clk_name)) + return rp1_clk_claimed[i]; + } + } + + return false; +} + +static int rp1_clk_probe(struct platform_device *pdev) +{ + const struct rp1_clk_desc *desc; + struct device *dev = &pdev->dev; + struct rp1_clockman *clockman; + struct resource *res; + struct clk_hw **hws; + const size_t asize = ARRAY_SIZE(clk_desc_array); + u32 chip_id, platform; + unsigned int i; + u32 clk_id; + int ret; + + clockman = devm_kzalloc(dev, struct_size(clockman, onecell.hws, asize), + GFP_KERNEL); + if (!clockman) + return -ENOMEM; + + rp1_get_platform(&chip_id, &platform); + + spin_lock_init(&clockman->regs_lock); + clockman->dev = dev; + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + clockman->regs = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(clockman->regs)) + return PTR_ERR(clockman->regs); + + memset(rp1_clk_claimed, 0, sizeof(rp1_clk_claimed)); + for (i = 0; + !of_property_read_u32_index(pdev->dev.of_node, "claim-clocks", + i, &clk_id); + i++) + rp1_clk_claimed[clk_id] = true; + + platform_set_drvdata(pdev, clockman); + + clockman->onecell.num = asize; + hws = clockman->onecell.hws; + + for (i = 0; i < asize; i++) { + desc = &clk_desc_array[i]; + if (desc->clk_register && desc->data) { + hws[i] = desc->clk_register(clockman, desc->data); + if (IS_ERR_OR_NULL(hws[i])) { + pr_err("Failed to register RP1 clock '%s' (%ld) - wrong dtbs?\n", *(char **)desc->data, PTR_ERR(hws[i])); + hws[i] = NULL; + continue; + } + if (!strcmp(clk_hw_get_name(hws[i]), "clk_i2s")) { + clk_i2s = hws[i]; + clk_xosc = clk_hw_get_parent_by_index(clk_i2s, 0); + clk_audio = clk_hw_get_parent_by_index(clk_i2s, 1); + } + } + } + + ret = of_clk_add_hw_provider(dev->of_node, of_clk_hw_onecell_get, + &clockman->onecell); + if (ret) + return ret; + + return 0; +} + +static const struct of_device_id rp1_clk_of_match[] = { + { .compatible = "raspberrypi,rp1-clocks" }, + {} +}; +MODULE_DEVICE_TABLE(of, rp1_clk_of_match); + +static struct platform_driver rp1_clk_driver = { + .driver = { + .name = "rp1-clk", + .of_match_table = rp1_clk_of_match, + }, + .probe = rp1_clk_probe, +}; + +static int __init __rp1_clk_driver_init(void) +{ + return platform_driver_register(&rp1_clk_driver); +} +postcore_initcall(__rp1_clk_driver_init); + +MODULE_AUTHOR("Naushir Patuck "); +MODULE_DESCRIPTION("RP1 clock driver"); +MODULE_LICENSE("GPL"); diff --git a/include/dt-bindings/clock/rp1.h b/include/dt-bindings/clock/rp1.h index 5fc04d45bf9372..1305bf79ae34e9 100644 --- a/include/dt-bindings/clock/rp1.h +++ b/include/dt-bindings/clock/rp1.h @@ -13,39 +13,40 @@ #define RP1_PLL_SYS_PRI_PH 6 #define RP1_PLL_SYS_SEC_PH 7 +#define RP1_PLL_AUDIO_PRI_PH 8 -#define RP1_PLL_SYS_SEC 8 -#define RP1_PLL_AUDIO_SEC 9 -#define RP1_PLL_VIDEO_SEC 10 +#define RP1_PLL_SYS_SEC 9 +#define RP1_PLL_AUDIO_SEC 10 +#define RP1_PLL_VIDEO_SEC 11 -#define RP1_CLK_SYS 11 -#define RP1_CLK_SLOW_SYS 12 -#define RP1_CLK_DMA 13 -#define RP1_CLK_UART 14 -#define RP1_CLK_ETH 15 -#define RP1_CLK_PWM0 16 -#define RP1_CLK_PWM1 17 -#define RP1_CLK_AUDIO_IN 18 -#define RP1_CLK_AUDIO_OUT 19 -#define RP1_CLK_I2S 20 -#define RP1_CLK_MIPI0_CFG 21 -#define RP1_CLK_MIPI1_CFG 22 -#define RP1_CLK_PCIE_AUX 23 -#define RP1_CLK_USBH0_MICROFRAME 24 -#define RP1_CLK_USBH1_MICROFRAME 25 -#define RP1_CLK_USBH0_SUSPEND 26 -#define RP1_CLK_USBH1_SUSPEND 27 -#define RP1_CLK_ETH_TSU 28 -#define RP1_CLK_ADC 29 -#define RP1_CLK_SDIO_TIMER 30 -#define RP1_CLK_SDIO_ALT_SRC 31 -#define RP1_CLK_GP0 32 -#define RP1_CLK_GP1 33 -#define RP1_CLK_GP2 34 -#define RP1_CLK_GP3 35 -#define RP1_CLK_GP4 36 -#define RP1_CLK_GP5 37 -#define RP1_CLK_VEC 38 -#define RP1_CLK_DPI 39 -#define RP1_CLK_MIPI0_DPI 40 -#define RP1_CLK_MIPI1_DPI 41 +#define RP1_CLK_SYS 12 +#define RP1_CLK_SLOW_SYS 13 +#define RP1_CLK_DMA 14 +#define RP1_CLK_UART 15 +#define RP1_CLK_ETH 16 +#define RP1_CLK_PWM0 17 +#define RP1_CLK_PWM1 18 +#define RP1_CLK_AUDIO_IN 19 +#define RP1_CLK_AUDIO_OUT 20 +#define RP1_CLK_I2S 21 +#define RP1_CLK_MIPI0_CFG 22 +#define RP1_CLK_MIPI1_CFG 23 +#define RP1_CLK_PCIE_AUX 24 +#define RP1_CLK_USBH0_MICROFRAME 25 +#define RP1_CLK_USBH1_MICROFRAME 26 +#define RP1_CLK_USBH0_SUSPEND 27 +#define RP1_CLK_USBH1_SUSPEND 28 +#define RP1_CLK_ETH_TSU 29 +#define RP1_CLK_ADC 30 +#define RP1_CLK_SDIO_TIMER 31 +#define RP1_CLK_SDIO_ALT_SRC 32 +#define RP1_CLK_GP0 33 +#define RP1_CLK_GP1 34 +#define RP1_CLK_GP2 35 +#define RP1_CLK_GP3 36 +#define RP1_CLK_GP4 37 +#define RP1_CLK_GP5 38 +#define RP1_CLK_VEC 39 +#define RP1_CLK_DPI 40 +#define RP1_CLK_MIPI0_DPI 41 +#define RP1_CLK_MIPI1_DPI 42