diff options
| author | Ryan Chen <ryan_chen@aspeedtech.com> | 2026-03-24 09:58:50 +0800 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2026-03-25 09:55:36 +0100 |
| commit | 4f7cfb94be61677e8bfb7cbc909496f67bb6a08f (patch) | |
| tree | 4e323f56e7669c264c59ac540289de986e061d3d | |
| parent | 918d627c091683203a76badc88c2cd58b420f107 (diff) | |
mmc: sdhci-of-aspeed: Handle optional controller reset
Get the optional reset line for the ASPEED SD controller during probe by
using devm_reset_control_get_optional_exclusive_deasserted().
This allows platforms such as AST2700, which require the SD controller
to be taken out of reset before use, to work with the existing driver.
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ryan Chen <ryan_chen@aspeedtech.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
| -rw-r--r-- | drivers/mmc/host/sdhci-of-aspeed.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci-of-aspeed.c b/drivers/mmc/host/sdhci-of-aspeed.c index 4296def69436..f5d973783cbe 100644 --- a/drivers/mmc/host/sdhci-of-aspeed.c +++ b/drivers/mmc/host/sdhci-of-aspeed.c @@ -13,6 +13,7 @@ #include <linux/of.h> #include <linux/of_platform.h> #include <linux/platform_device.h> +#include <linux/reset.h> #include <linux/spinlock.h> #include "sdhci-pltfm.h" @@ -519,6 +520,7 @@ static struct platform_driver aspeed_sdhci_driver = { static int aspeed_sdc_probe(struct platform_device *pdev) { + struct reset_control *reset; struct device_node *parent; struct aspeed_sdc *sdc; int ret; @@ -529,6 +531,10 @@ static int aspeed_sdc_probe(struct platform_device *pdev) spin_lock_init(&sdc->lock); + reset = devm_reset_control_get_optional_exclusive_deasserted(&pdev->dev, NULL); + if (IS_ERR(reset)) + return dev_err_probe(&pdev->dev, PTR_ERR(reset), "unable to acquire reset\n"); + sdc->clk = devm_clk_get(&pdev->dev, NULL); if (IS_ERR(sdc->clk)) return PTR_ERR(sdc->clk); |