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regulator: gpio: add gpios-status for DT

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config->gpios[x].flags indicates initial pin status,
and it will be used for drvdata->state
on gpio_regulator_probe().
But, current of_get_gpio_regulator_config() doesn't care
about this flags.
This patch adds new gpios-status property in order to
care about initial pin status.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Kuninori Morimoto 2014-01-30 21:25:14 -08:00 committed by Mark Brown
parent 9c25960cbb
commit 0094050d78
2 changed files with 12 additions and 0 deletions
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1
Documentation/devicetree/bindings/regulator/gpio-regulator.txt
View File

@ -8,6 +8,7 @@ Required properties:
Optional properties:
- enable-gpio : GPIO to use to enable/disable the regulator.
- gpios : GPIO group used to control voltage.
- gpios-states : gpios pin's initial states. 1 means HIGH
- startup-delay-us : Startup time in microseconds.
- enable-active-high : Polarity of GPIO is active high (default is low).

11
drivers/regulator/gpio-regulator.c
View File

@ -172,11 +172,22 @@ of_get_gpio_regulator_config(struct device *dev, struct device_node *np)
if (!config->gpios)
return ERR_PTR(-ENOMEM);
prop = of_find_property(np, "gpios-states", NULL);
if (prop) {
proplen = prop->length / sizeof(int);
if (proplen != config->nr_gpios) {
/* gpios <-> gpios-states mismatch */
prop = NULL;
}
}
for (i = 0; i < config->nr_gpios; i++) {
gpio = of_get_named_gpio(np, "gpios", i);
if (gpio < 0)
break;
config->gpios[i].gpio = gpio;
if (prop && be32_to_cpup((int *)prop->value + i))
config->gpios[i].flags = GPIOF_OUT_INIT_HIGH;
}
/* Fetch states. */