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mmc: f-sdh30: Add reset control support

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Add reset control support for F_SDH30 controller. This is optional.

Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Acked-by: Jassi Brar <jaswinder.singh@linaro.org>
Link: https://lore.kernel.org/r/20221111081033.3813-3-hayashi.kunihiko@socionext.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Kunihiko Hayashi 2022-11-11 17:10:29 +09:00 committed by Ulf Hansson
parent cb7e1e9311
commit bd724b279f
1 changed files with 16 additions and 1 deletions
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17
drivers/mmc/host/sdhci_f_sdh30.c
View file

@ -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);