Commit bd724b27 authored by Kunihiko Hayashi's avatar Kunihiko Hayashi Committed by Ulf Hansson
Browse files

mmc: f-sdh30: Add reset control support 



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

Signed-off-by: default avatarKunihiko Hayashi <hayashi.kunihiko@socionext.com>
Acked-by: default avatarJassi Brar <jaswinder.singh@linaro.org>
Link: https://lore.kernel.org/r/20221111081033.3813-3-hayashi.kunihiko@socionext.com


Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent cb7e1e93

drivers/mmc/host/sdhci_f_sdh30.c

+16 −1
Original line number Diff line number Diff line
@@ -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);