diff options
| author |   Takashi Iwai <tiwai@suse.de> | 2010-12-13 09:28:43 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2010-12-13 09:28:43 +0100 |
| commit | 20aeeb356ba2e8daa99b5942c528ae2b3ea28433 (patch) | |
| tree | d2cebc7039954851998d592123899f5627def7a9 /drivers/gpio | |
| parent | Merge branch 'for-2.6.37' into for-2.6.38 (diff) | |
| parent | sound: don't use flush_scheduled_work() (diff) | |
| download | linux-dev-20aeeb356ba2e8daa99b5942c528ae2b3ea28433.tar.xz linux-dev-20aeeb356ba2e8daa99b5942c528ae2b3ea28433.zip | |
Merge branch 'topic/workq-update' into topic/asoc
Conflicts:
sound/soc/codecs/wm8350.c
sound/soc/codecs/wm8753.c
sound/soc/sh/fsi.c
sound/soc/soc-core.c
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/cs5535-gpio.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/drivers/gpio/cs5535-gpio.c b/drivers/gpio/cs5535-gpio.c index e23c06893d19..599f6c9e0fbf 100644 --- a/drivers/gpio/cs5535-gpio.c +++ b/drivers/gpio/cs5535-gpio.c @@ -56,6 +56,18 @@ static struct cs5535_gpio_chip { * registers, see include/linux/cs5535.h. */ +static void errata_outl(u32 val, unsigned long addr) +{ + /* + * According to the CS5536 errata (#36), after suspend + * a write to the high bank GPIO register will clear all + * non-selected bits; the recommended workaround is a + * read-modify-write operation. + */ + val |= inl(addr); + outl(val, addr); +} + static void __cs5535_gpio_set(struct cs5535_gpio_chip *chip, unsigned offset, unsigned int reg) { @@ -64,7 +76,7 @@ static void __cs5535_gpio_set(struct cs5535_gpio_chip *chip, unsigned offset, outl(1 << offset, chip->base + reg); else /* high bank register */ - outl(1 << (offset - 16), chip->base + 0x80 + reg); + errata_outl(1 << (offset - 16), chip->base + 0x80 + reg); } void cs5535_gpio_set(unsigned offset, unsigned int reg) @@ -86,7 +98,7 @@ static void __cs5535_gpio_clear(struct cs5535_gpio_chip *chip, unsigned offset, outl(1 << (offset + 16), chip->base + reg); else /* high bank register */ - outl(1 << offset, chip->base + 0x80 + reg); + errata_outl(1 << offset, chip->base + 0x80 + reg); } void cs5535_gpio_clear(unsigned offset, unsigned int reg) |