drivers: sdmmc_stm32: Fix bus width initialization sequence

Fix SDMMC initialization by starting with 1-bit bus mode and
properly configuring wide bus operation after HAL
initialization.

The SDMMC protocol requires initialization to start in
1-bit mode before switching to wider bus widths.
Previously, the driver attempted to initialize directly
with the target bus width, which could cause later read/write
failures.

Changes:
- Initialize with SDMMC_BUS_WIDE_1B instead of target bus width
- Add HAL_SD_ConfigWideBusOperation() call after successful init
- Add error logging for wide bus configuration failures

Fixes potential SDMMC read/write failures issues on STM32 platforms.

Signed-off-by: Shan Pen <[email protected]>

Author: bricle

drivers/disk/sdmmc_stm32.c

@@ -365,7 +365,9 @@ static int stm32_sdmmc_access_init(struct disk_info *disk)
 		LOG_ERR("failed to init stm32_sdmmc (ErrorCode 0x%X)", priv->hsd.ErrorCode);
 		return -EIO;
 	}
-
+	if (HAL_SD_ConfigWideBusOperation(&priv->hsd, priv->hsd.Init.BusWide) != HAL_OK) {
+		LOG_ERR("failed to configure wide bus operation");
+	}
 #ifdef CONFIG_SDMMC_STM32_HWFC
 	stm32_sdmmc_fc_enable(priv);
 #endif
@@ -887,7 +889,7 @@ static struct stm32_sdmmc_priv stm32_sdmmc_priv_1 = {
 						: SDMMC_CLOCK_BYPASS_DISABLE,
 #endif
 		.Init.ClockPowerSave = SDMMC_CLOCK_POWER_SAVE_DISABLE,
-		.Init.BusWide = SDMMC_BUS_WIDTH,
+		.Init.BusWide = SDMMC_BUS_WIDE_1B,
 		.Init.HardwareFlowControl = SDMMC_HARDWARE_FLOW_CONTROL_DISABLE,
 		.Init.ClockDiv = DT_INST_PROP_OR(0, clk_div, 0),
 	},