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mmc: add a function to get regulators, supplying card's power

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Add a function to get regulators, supplying card's Vdd and Vccq on a
specific host. If a Vdd supplying regulator is found, the function checks,
whether a valid OCR mask can be obtained from it. The Vccq regulator is
optional. A failure to get it is not fatal.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Reviwed-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
Guennadi Liakhovetski 2012-06-20 02:28:43 -04:00 • committed by Chris Ball
parent 6de707f200
commit e137788dd1
2 changed files with 37 additions and 2 deletions
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16
include/linux/mmc/host.h
View file

@ -155,6 +155,13 @@ struct mmc_hotplug {
void *handler_priv;
};
struct regulator;
struct mmc_supply {
struct regulator *vmmc; /* Card power supply */
struct regulator *vqmmc; /* Optional Vccq supply */
};
struct mmc_host {
struct device *parent;
struct device class_dev;
@ -309,6 +316,7 @@ struct mmc_host {
#ifdef CONFIG_REGULATOR
bool regulator_enabled; /* regulator state */
#endif
struct mmc_supply supply;
struct dentry *debugfs_root;
@ -357,13 +365,12 @@ static inline void mmc_signal_sdio_irq(struct mmc_host *host)
wake_up_process(host->sdio_irq_thread);
}
struct regulator;
#ifdef CONFIG_REGULATOR
int mmc_regulator_get_ocrmask(struct regulator *supply);
int mmc_regulator_set_ocr(struct mmc_host *mmc,
struct regulator *supply,
unsigned short vdd_bit);
int mmc_regulator_get_supply(struct mmc_host *mmc);
#else
static inline int mmc_regulator_get_ocrmask(struct regulator *supply)
{
@ -376,6 +383,11 @@ static inline int mmc_regulator_set_ocr(struct mmc_host *mmc,
{
return 0;
}
static inline int mmc_regulator_get_supply(struct mmc_host *mmc)
{
return 0;
}
#endif
int mmc_card_awake(struct mmc_host *host);