michaelh/zephyr
1
0
Fork 0
Code Releases Activity

drivers: memc: stm32 fmc add clock source select

Browse source 
FMC default clock is hclk, it may affected by sys_ck change.

Signed-off-by: HaiLong Yang <hailong.yang@brainco.cn>
This commit is contained in:
HaiLong Yang 2023-12-14 10:52:29 +08:00 • committed by Carles Cufí
commit 83f89da24e
1 changed files with 24 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

28
drivers/memc/memc_stm32.c
View file

@ -21,9 +21,18 @@ LOG_MODULE_REGISTER(memc_stm32, CONFIG_MEMC_LOG_LEVEL);
#error "No compatible FMC devicetree node found" #error "No compatible FMC devicetree node found"
#endif #endif
/* This symbol takes the value 1 if one of the device instances */
/* is configured in dts with a domain clock */
#if STM32_DT_INST_DEV_DOMAIN_CLOCK_SUPPORT
#define STM32_FMC_DOMAIN_CLOCK_SUPPORT 1
#else
#define STM32_FMC_DOMAIN_CLOCK_SUPPORT 0
#endif
struct memc_stm32_config { struct memc_stm32_config {
uint32_t fmc; uint32_t fmc;
struct stm32_pclken pclken; const struct stm32_pclken *pclken;
size_t pclk_len;
const struct pinctrl_dev_config *pcfg; const struct pinctrl_dev_config *pcfg;
}; };
@ -49,12 +58,21 @@ static int memc_stm32_init(const struct device *dev)
return -ENODEV; return -ENODEV;
} }
r = clock_control_on(clk, (clock_control_subsys_t)&config->pclken); r = clock_control_on(clk, (clock_control_subsys_t)&config->pclken[0]);
if (r < 0) { if (r < 0) {
LOG_ERR("Could not initialize FMC clock (%d)", r); LOG_ERR("Could not initialize FMC clock (%d)", r);
return r; return r;
} }
if (IS_ENABLED(STM32_FMC_DOMAIN_CLOCK_SUPPORT) && (config->pclk_len > 1)) {
/* Enable FMC clock source */
r = clock_control_configure(clk, (clock_control_subsys_t)&config->pclken[1], NULL);
if (r < 0) {
LOG_ERR("Could not select FMC clock (%d)", r);
return r;
}
}
#if DT_HAS_COMPAT_STATUS_OKAY(st_stm32h7_fmc) #if DT_HAS_COMPAT_STATUS_OKAY(st_stm32h7_fmc)
#if (DT_ENUM_IDX(DT_DRV_INST(0), st_mem_swap) == 1) #if (DT_ENUM_IDX(DT_DRV_INST(0), st_mem_swap) == 1)
/* sdram-sram */ /* sdram-sram */
@ -70,10 +88,12 @@ static int memc_stm32_init(const struct device *dev)
PINCTRL_DT_INST_DEFINE(0); PINCTRL_DT_INST_DEFINE(0);
static const struct stm32_pclken pclken[] = STM32_DT_INST_CLOCKS(0);
static const struct memc_stm32_config config = { static const struct memc_stm32_config config = {
.fmc = DT_INST_REG_ADDR(0), .fmc = DT_INST_REG_ADDR(0),
.pclken = { .bus = DT_INST_CLOCKS_CELL(0, bus), .pclken = pclken,
.enr = DT_INST_CLOCKS_CELL(0, bits) }, .pclk_len = DT_INST_NUM_CLOCKS(0),
.pcfg = PINCTRL_DT_INST_DEV_CONFIG_GET(0), .pcfg = PINCTRL_DT_INST_DEV_CONFIG_GET(0),
}; };