mirrors/linux
2
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-05-16 07:51:31 -04:00
Code Issues Packages Projects Releases Wiki Activity

mmc: sdhci-of-aspeed: Handle optional controller reset

Browse Source 
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>
This commit is contained in:
Ryan Chen
2026-03-24 09:58:50 +08:00
committed by Ulf Hansson
parent 918d627c09
commit 4f7cfb94be
1 changed files with 6 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/mmc/host/sdhci-of-aspeed.c
View File

@@ -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);