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arch/arm64/imx9 4byte addressing to nor #288

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arch/arm64/imx9 4byte addressing to nor #288

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dabe7b9
arch/arm64/imx9 4byte addressing to nor
joukkone Sep 25, 2024
e7b773e
arc/arm64/imx9: Improve flexspi nor performance
joukkone Sep 30, 2024
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15 changes: 8 additions & 7 deletions arch/arm64/src/imx9/imx9_flexspi.c
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Original file line number Diff line number Diff line change
Expand Up @@ -561,6 +561,8 @@ void imx9_flexspi_init(struct flexspi_type_s *base,

void imx9_flexspi_get_default_config(struct flexspi_config_s *config)
{
int i;

/* Initializes the configure structure to zero */

memset(config, 0, sizeof(*config));
Expand Down Expand Up @@ -588,7 +590,7 @@ void imx9_flexspi_get_default_config(struct flexspi_config_s *config)
* buffers.
*/

for (uint8_t i = 0; i < ((uint8_t)FLEXSPI_AHB_BUFFER_COUNT - 2u); i++)
for (i = 0; i < (FLEXSPI_AHB_BUFFER_COUNT - 2u); i++)
{
/* Default enable AHB prefetch */

Expand All @@ -605,8 +607,7 @@ void imx9_flexspi_get_default_config(struct flexspi_config_s *config)
config->ahb_config.buffer[i].buffer_size = 0;
}

for (uint8_t i = ((uint8_t)FLEXSPI_AHB_BUFFER_COUNT - 2);
i < (uint8_t)FLEXSPI_AHB_BUFFER_COUNT; i++)
for (; i < FLEXSPI_AHB_BUFFER_COUNT; i++)
{
config->ahb_config.buffer[i].enable_prefetch = true; /* Default enable
* AHB prefetch.
Expand All @@ -618,8 +619,8 @@ void imx9_flexspi_get_default_config(struct flexspi_config_s *config)
}

config->ahb_config.enable_clear_ahb_buffer_opt = false;
config->ahb_config.enable_read_address_opt = false;
config->ahb_config.enable_ahb_prefetch = false;
config->ahb_config.enable_read_address_opt = true;
config->ahb_config.enable_ahb_prefetch = true;
config->ahb_config.enable_ahb_bufferable = false;
config->ahb_config.enable_ahb_cachable = false;
}
Expand Down Expand Up @@ -1235,9 +1236,9 @@ struct flexspi_dev_s *imx9_flexspi_initialize(int intf)

imx9_ccm_gate_on(CCM_LPCG_FLEXSPI1, true);

/* Configure clock to safe 50MHz, src clock is 800Mhz */
/* Configure clock to 133MHz, src clock is 800Mhz */

imx9_ccm_configure_root_clock(CCM_CR_FLEXSPI1, SYS_PLL1PFD1, 16);
imx9_ccm_configure_root_clock(CCM_CR_FLEXSPI1, SYS_PLL1PFD1, 6);

/* Has the FlexSPI hardware been initialized? */

Expand Down
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