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drivers/disk: sdmmc: stm32: configurable SDMMC bus width

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Make the SDMMC bus width for STM32 configurable.
Fixes #45021.

Signed-off-by: Benedikt Schmidt <benedikt.schmidt@embedded-solutions.at>
This commit is contained in:
Benedikt Schmidt 2022-05-19 13:57:34 +02:00 • committed by Carles Cufí
commit 36b9da8874
2 changed files with 21 additions and 0 deletions
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9
drivers/disk/sdmmc_stm32.c
View file

@ -495,10 +495,19 @@ static void stm32_sdmmc_irq_config_func(const struct device *dev)
irq_enable(DT_INST_IRQN(0)); irq_enable(DT_INST_IRQN(0));
} }
#if DT_INST_PROP(0, bus_width) == 1
#define SDMMC_BUS_WIDTH SDMMC_BUS_WIDE_1B
#elif DT_INST_PROP(0, bus_width) == 4
#define SDMMC_BUS_WIDTH SDMMC_BUS_WIDE_4B
#elif DT_INST_PROP(0, bus_width) == 8
#define SDMMC_BUS_WIDTH SDMMC_BUS_WIDE_8B
#endif /* DT_INST_PROP(0, bus_width) */
static struct stm32_sdmmc_priv stm32_sdmmc_priv_1 = { static struct stm32_sdmmc_priv stm32_sdmmc_priv_1 = {
.irq_config = stm32_sdmmc_irq_config_func, .irq_config = stm32_sdmmc_irq_config_func,
.hsd = { .hsd = {
.Instance = (MMC_TypeDef *)DT_INST_REG_ADDR(0), .Instance = (MMC_TypeDef *)DT_INST_REG_ADDR(0),
.Init.BusWide = SDMMC_BUS_WIDTH,
}, },
#if DT_INST_NODE_HAS_PROP(0, cd_gpios) #if DT_INST_NODE_HAS_PROP(0, cd_gpios)
.cd = { .cd = {

12
dts/bindings/mmc/st,stm32-sdmmc.yaml
View file

@ -29,3 +29,15 @@ properties:
type: phandle-array type: phandle-array
required: false required: false
description: Power pin description: Power pin
bus-width:
type: int
required: false
default: 1
description: |
bus width for SDMMC access, defaults to the minimum necessary
number of bus lines
enum:
- 1
- 4
- 8