Commit b2832b96 authored by Claudiu Beznea's avatar Claudiu Beznea Committed by Ulf Hansson
Browse files

mmc: pwrseq: sd8787: add support for wilc1000 



Add new compatible for wilc1000 devices and specify the delay in .data
member of struct of_device_id. WILC1000, WILC3000 devices needs a minimum
of 5ms delay b/w reset and power lines.

Signed-off-by: default avatarClaudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/20210820092803.78523-3-claudiu.beznea@microchip.com


Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent 2c2eaf88

drivers/mmc/core/pwrseq_sd8787.c

+9 −2
Original line number Diff line number Diff line
@@ -14,6 +14,7 @@ 
#include <linux/kernel.h>

#include <linux/platform_device.h>

#include <linux/module.h>

#include <linux/of.h>

#include <linux/slab.h>

#include <linux/device.h>

#include <linux/err.h>
@@ -27,6 +28,7 @@ struct mmc_pwrseq_sd8787 { 
	struct mmc_pwrseq pwrseq;

	struct gpio_desc *reset_gpio;

	struct gpio_desc *pwrdn_gpio;

	u32 reset_pwrdwn_delay_ms;

};



#define to_pwrseq_sd8787(p) container_of(p, struct mmc_pwrseq_sd8787, pwrseq)
@@ -37,7 +39,7 @@ static void mmc_pwrseq_sd8787_pre_power_on(struct mmc_host *host) 


	gpiod_set_value_cansleep(pwrseq->reset_gpio, 1);



	msleep(300);

	msleep(pwrseq->reset_pwrdwn_delay_ms);

	gpiod_set_value_cansleep(pwrseq->pwrdn_gpio, 1);

}
@@ -55,7 +57,8 @@ static const struct mmc_pwrseq_ops mmc_pwrseq_sd8787_ops = { 
};



static const struct of_device_id mmc_pwrseq_sd8787_of_match[] = {

	{ .compatible = "mmc-pwrseq-sd8787",},

	{ .compatible = "mmc-pwrseq-sd8787", .data = (void *)300 },

	{ .compatible = "mmc-pwrseq-wilc1000", .data = (void *)5 },

	{/* sentinel */},

};

MODULE_DEVICE_TABLE(of, mmc_pwrseq_sd8787_of_match);
@@ -64,11 +67,15 @@ static int mmc_pwrseq_sd8787_probe(struct platform_device *pdev) 
{

	struct mmc_pwrseq_sd8787 *pwrseq;

	struct device *dev = &pdev->dev;

	const struct of_device_id *match;



	pwrseq = devm_kzalloc(dev, sizeof(*pwrseq), GFP_KERNEL);

	if (!pwrseq)

		return -ENOMEM;



	match = of_match_node(mmc_pwrseq_sd8787_of_match, pdev->dev.of_node);

	pwrseq->reset_pwrdwn_delay_ms = (u32)match->data;



	pwrseq->pwrdn_gpio = devm_gpiod_get(dev, "powerdown", GPIOD_OUT_LOW);

	if (IS_ERR(pwrseq->pwrdn_gpio))

		return PTR_ERR(pwrseq->pwrdn_gpio);