Add reset control support for F_SDH30 controller. This is optional.
Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@xxxxxxxxxxxxx>
Acked-by: Jassi Brar <jaswinder.singh@xxxxxxxxxx>
---
drivers/mmc/host/sdhci_f_sdh30.c | 17 ++++++++++++++++-
1 file changed, 16 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/host/sdhci_f_sdh30.c b/drivers/mmc/host/sdhci_f_sdh30.c
index 3f5977979cf2..7f4553b28180 100644
--- a/drivers/mmc/host/sdhci_f_sdh30.c
+++ b/drivers/mmc/host/sdhci_f_sdh30.c
@@ -14,6 +14,7 @@
#include <linux/of.h>
#include <linux/property.h>
#include <linux/clk.h>
+#include <linux/reset.h>
#include "sdhci-pltfm.h"
#include "sdhci_f_sdh30.h"
@@ -21,6 +22,7 @@
struct f_sdhost_priv {
struct clk *clk_iface;
struct clk *clk;
+ struct reset_control *rst;
u32 vendor_hs200;
struct device *dev;
bool enable_cmd_dat_delay;
@@ -150,6 +152,16 @@ static int sdhci_f_sdh30_probe(struct platform_device *pdev)
ret = clk_prepare_enable(priv->clk);
if (ret)
goto err_clk;
+
+ priv->rst = devm_reset_control_get_optional_shared(dev, NULL);
+ if (IS_ERR(priv->rst)) {
+ ret = PTR_ERR(priv->rst);
+ goto err_rst;
+ }
+
+ ret = reset_control_deassert(priv->rst);
+ if (ret)
+ goto err_rst;
}
/* init vendor specific regs */
@@ -175,6 +187,8 @@ static int sdhci_f_sdh30_probe(struct platform_device *pdev)
return 0;
err_add_host:
+ reset_control_assert(priv->rst);
+err_rst:
clk_disable_unprepare(priv->clk);
err_clk:
clk_disable_unprepare(priv->clk_iface);
@@ -191,8 +205,9 @@ static int sdhci_f_sdh30_remove(struct platform_device *pdev)
sdhci_remove_host(host, readl(host->ioaddr + SDHCI_INT_STATUS) ==
0xffffffff);
- clk_disable_unprepare(priv->clk_iface);
+ reset_control_assert(priv->rst);
clk_disable_unprepare(priv->clk);
+ clk_disable_unprepare(priv->clk_iface);
sdhci_free_host(host);
platform_set_drvdata(pdev, NULL);
--
2.25.1
