#include <linux/slab.h>
#include <linux/device.h>
#include <linux/err.h>
+#include <linux/of_gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/mmc/host.h>
struct mmc_pwrseq_simple {
struct mmc_pwrseq pwrseq;
- struct gpio_desc *reset_gpio;
+ int nr_gpios;
+ struct gpio_desc *reset_gpios[0];
};
+static void mmc_pwrseq_simple_set_gpios_value(struct mmc_pwrseq_simple *pwrseq,
+ int value)
+{
+ int i;
+
+ for (i = 0; i < pwrseq->nr_gpios; i++)
+ if (!IS_ERR(pwrseq->reset_gpios[i]))
+ gpiod_set_value_cansleep(pwrseq->reset_gpios[i], value);
+}
+
static void mmc_pwrseq_simple_pre_power_on(struct mmc_host *host)
{
struct mmc_pwrseq_simple *pwrseq = container_of(host->pwrseq,
struct mmc_pwrseq_simple, pwrseq);
- if (!IS_ERR(pwrseq->reset_gpio))
- gpiod_set_value_cansleep(pwrseq->reset_gpio, 1);
+ mmc_pwrseq_simple_set_gpios_value(pwrseq, 1);
}
static void mmc_pwrseq_simple_post_power_on(struct mmc_host *host)
struct mmc_pwrseq_simple *pwrseq = container_of(host->pwrseq,
struct mmc_pwrseq_simple, pwrseq);
- if (!IS_ERR(pwrseq->reset_gpio))
- gpiod_set_value_cansleep(pwrseq->reset_gpio, 0);
+ mmc_pwrseq_simple_set_gpios_value(pwrseq, 0);
}
static void mmc_pwrseq_simple_free(struct mmc_host *host)
{
struct mmc_pwrseq_simple *pwrseq = container_of(host->pwrseq,
struct mmc_pwrseq_simple, pwrseq);
+ int i;
- if (!IS_ERR(pwrseq->reset_gpio))
- gpiod_put(pwrseq->reset_gpio);
+ for (i = 0; i < pwrseq->nr_gpios; i++)
+ if (!IS_ERR(pwrseq->reset_gpios[i]))
+ gpiod_put(pwrseq->reset_gpios[i]);
kfree(pwrseq);
host->pwrseq = NULL;
int mmc_pwrseq_simple_alloc(struct mmc_host *host, struct device *dev)
{
struct mmc_pwrseq_simple *pwrseq;
- int ret = 0;
+ int i, nr_gpios, ret = 0;
- pwrseq = kzalloc(sizeof(struct mmc_pwrseq_simple), GFP_KERNEL);
+ nr_gpios = of_gpio_named_count(dev->of_node, "reset-gpios");
+ if (nr_gpios < 0)
+ nr_gpios = 0;
+
+ pwrseq = kzalloc(sizeof(struct mmc_pwrseq_simple) + nr_gpios *
+ sizeof(struct gpio_desc *), GFP_KERNEL);
if (!pwrseq)
return -ENOMEM;
- pwrseq->reset_gpio = gpiod_get_index(dev, "reset", 0, GPIOD_OUT_HIGH);
- if (IS_ERR(pwrseq->reset_gpio) &&
- PTR_ERR(pwrseq->reset_gpio) != -ENOENT &&
- PTR_ERR(pwrseq->reset_gpio) != -ENOSYS) {
- ret = PTR_ERR(pwrseq->reset_gpio);
- goto free;
+ for (i = 0; i < nr_gpios; i++) {
+ pwrseq->reset_gpios[i] = gpiod_get_index(dev, "reset", i,
+ GPIOD_OUT_HIGH);
+ if (IS_ERR(pwrseq->reset_gpios[i]) &&
+ PTR_ERR(pwrseq->reset_gpios[i]) != -ENOENT &&
+ PTR_ERR(pwrseq->reset_gpios[i]) != -ENOSYS) {
+ ret = PTR_ERR(pwrseq->reset_gpios[i]);
+
+ while (--i)
+ gpiod_put(pwrseq->reset_gpios[i]);
+
+ goto free;
+ }
}
+ pwrseq->nr_gpios = nr_gpios;
pwrseq->pwrseq.ops = &mmc_pwrseq_simple_ops;
host->pwrseq = &pwrseq->pwrseq;