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mmc: Move regulator handling closer to core

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After discovering a problem in regulator reference counting I took Mark
Brown's advice to move the reference count into the MMC core by making the
regulator status a member of struct mmc_host.

I took this opportunity to also implement NULL versions of
the regulator functions so as to rid the driver code from
some ugly #ifdef CONFIG_REGULATOR clauses.

Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Reviewed-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: Liam Girdwood <lrg@slimlogic.co.uk>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Adrian Hunter <adrian.hunter@nokia.com>
Cc: Robert Jarzmik <robert.jarzmik@free.fr>
Cc: Sundar Iyer <sundar.iyer@stericsson.com>
Cc: Daniel Mack <daniel@caiaq.de>
Cc: Pierre Ossman <pierre@ossman.eu>
Cc: Matt Fleming <matt@console-pimps.org>
Cc: David Brownell <dbrownell@users.sourceforge.net>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Eric Miao <eric.y.miao@gmail.com>
Cc: Cliff Brake <cbrake@bec-systems.com>
Cc: Jarkko Lavinen <jarkko.lavinen@nokia.com>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
Linus Walleij 2010-09-29 01:08:27 -04:00 • committed by Chris Ball
parent 4d0b8611cd
commit 99fc513101
5 changed files with 101 additions and 37 deletions
Download patch file Download diff file Expand all files Collapse all files

22
include/linux/mmc/host.h
View file

@ -212,6 +212,10 @@ struct mmc_host {
struct led_trigger *led; /* activity led */
#endif
#ifdef CONFIG_REGULATOR
bool regulator_enabled; /* regulator state */
#endif
struct dentry *debugfs_root;
unsigned long private[0] ____cacheline_aligned;
@ -250,8 +254,24 @@ static inline void mmc_signal_sdio_irq(struct mmc_host *host)
struct regulator;
#ifdef CONFIG_REGULATOR
int mmc_regulator_get_ocrmask(struct regulator *supply);
int mmc_regulator_set_ocr(struct regulator *supply, unsigned short vdd_bit);
int mmc_regulator_set_ocr(struct mmc_host *mmc,
struct regulator *supply,
unsigned short vdd_bit);
#else
static inline int mmc_regulator_get_ocrmask(struct regulator *supply)
{
return 0;
}
static inline int mmc_regulator_set_ocr(struct mmc_host *mmc,
struct regulator *supply,
unsigned short vdd_bit)
{
return 0;
}
#endif
int mmc_card_awake(struct mmc_host *host);
int mmc_card_sleep(struct mmc_host *host);