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mmc: pwrseq: sd8787: add support for wilc1000

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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: Claudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/20210820092803.78523-3-claudiu.beznea@microchip.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Claudiu Beznea 2021-08-20 12:28:01 +03:00 • committed by Ulf Hansson
parent 2c2eaf882f
commit b2832b96fc
1 changed files with 9 additions and 2 deletions
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11
drivers/mmc/core/pwrseq_sd8787.c
View file

@ -14,6 +14,7 @@
#include <linux/kernel.h> #include <linux/kernel.h>
#include <linux/platform_device.h> #include <linux/platform_device.h>
#include <linux/module.h> #include <linux/module.h>
#include <linux/of.h>
#include <linux/slab.h> #include <linux/slab.h>
#include <linux/device.h> #include <linux/device.h>
#include <linux/err.h> #include <linux/err.h>
@ -27,6 +28,7 @@ struct mmc_pwrseq_sd8787 {
struct mmc_pwrseq pwrseq; struct mmc_pwrseq pwrseq;
struct gpio_desc *reset_gpio; struct gpio_desc *reset_gpio;
struct gpio_desc *pwrdn_gpio; struct gpio_desc *pwrdn_gpio;
u32 reset_pwrdwn_delay_ms;
}; };
#define to_pwrseq_sd8787(p) container_of(p, struct mmc_pwrseq_sd8787, pwrseq) #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); gpiod_set_value_cansleep(pwrseq->reset_gpio, 1);
msleep(300); msleep(pwrseq->reset_pwrdwn_delay_ms);
gpiod_set_value_cansleep(pwrseq->pwrdn_gpio, 1); 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[] = { 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 */}, {/* sentinel */},
}; };
MODULE_DEVICE_TABLE(of, mmc_pwrseq_sd8787_of_match); 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 mmc_pwrseq_sd8787 *pwrseq;
struct device *dev = &pdev->dev; struct device *dev = &pdev->dev;
const struct of_device_id *match;
pwrseq = devm_kzalloc(dev, sizeof(*pwrseq), GFP_KERNEL); pwrseq = devm_kzalloc(dev, sizeof(*pwrseq), GFP_KERNEL);
if (!pwrseq) if (!pwrseq)
return -ENOMEM; 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); pwrseq->pwrdn_gpio = devm_gpiod_get(dev, "powerdown", GPIOD_OUT_LOW);
if (IS_ERR(pwrseq->pwrdn_gpio)) if (IS_ERR(pwrseq->pwrdn_gpio))
return PTR_ERR(pwrseq->pwrdn_gpio); return PTR_ERR(pwrseq->pwrdn_gpio);