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mmc: pwrseq_simple: use GPIO descriptors array API

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The simple power sequence provider sets a value for multiple GPIOs in one
go so it is better to use the API already provided by the GPIO descriptor
API instead of open coding the same logic.

Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Javier Martinez Canillas 2015-09-21 14:14:54 +02:00 committed by Ulf Hansson
parent 8131e815f7
commit ce03727586
1 changed files with 15 additions and 30 deletions
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45
drivers/mmc/core/pwrseq_simple.c
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@ -23,18 +23,21 @@ struct mmc_pwrseq_simple {
struct mmc_pwrseq pwrseq;
bool clk_enabled;
struct clk *ext_clk;
int nr_gpios;
struct gpio_desc *reset_gpios[0];
struct gpio_descs *reset_gpios;
};
static void mmc_pwrseq_simple_set_gpios_value(struct mmc_pwrseq_simple *pwrseq,
int value)
{
int i;
struct gpio_descs *reset_gpios = pwrseq->reset_gpios;
int values[reset_gpios->ndescs];
for (i = 0; i < pwrseq->nr_gpios; i++)
if (!IS_ERR(pwrseq->reset_gpios[i]))
gpiod_set_value_cansleep(pwrseq->reset_gpios[i], value);
for (i = 0; i < reset_gpios->ndescs; i++)
values[i] = value;
gpiod_set_array_value_cansleep(reset_gpios->ndescs, reset_gpios->desc,
values);
}
static void mmc_pwrseq_simple_pre_power_on(struct mmc_host *host)
@ -75,11 +78,8 @@ 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;
for (i = 0; i < pwrseq->nr_gpios; i++)
if (!IS_ERR(pwrseq->reset_gpios[i]))
gpiod_put(pwrseq->reset_gpios[i]);
gpiod_put_array(pwrseq->reset_gpios);
if (!IS_ERR(pwrseq->ext_clk))
clk_put(pwrseq->ext_clk);
@ -98,14 +98,9 @@ struct mmc_pwrseq *mmc_pwrseq_simple_alloc(struct mmc_host *host,
struct device *dev)
{
struct mmc_pwrseq_simple *pwrseq;
int i, nr_gpios, ret = 0;
int ret = 0;
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);
pwrseq = kzalloc(sizeof(*pwrseq), GFP_KERNEL);
if (!pwrseq)
return ERR_PTR(-ENOMEM);
@ -116,22 +111,12 @@ struct mmc_pwrseq *mmc_pwrseq_simple_alloc(struct mmc_host *host,
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 clk_put;
}
pwrseq->reset_gpios = gpiod_get_array(dev, "reset", GPIOD_OUT_HIGH);
if (IS_ERR(pwrseq->reset_gpios)) {
ret = PTR_ERR(pwrseq->reset_gpios);
goto clk_put;
}
pwrseq->nr_gpios = nr_gpios;
pwrseq->pwrseq.ops = &mmc_pwrseq_simple_ops;
return &pwrseq->pwrseq;