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[ALSA] Don't set gpio mask register in snd_ice1712_gpio_write_bits()

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Some calls to snd_ice1712_gpio_write() go wrong, if
snd_ice1712_gpio_write_bits() ran before and changed the gpio mask register.
Read the actual gpio value and combine it with the to be set bits in the cpu
instead.

Signed-off-by: Karsten Wiese <fzu@wemgehoertderstaat.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Karsten Wiese 2008-04-22 12:52:45 +02:00 committed by Takashi Iwai
parent 988f066477
commit 775c199e6a
1 changed files with 6 additions and 2 deletions
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8
sound/pci/ice1712/ice1712.h
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@ -438,10 +438,14 @@ int snd_ice1712_gpio_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_valu
static inline void snd_ice1712_gpio_write_bits(struct snd_ice1712 *ice,
unsigned int mask, unsigned int bits)
{
unsigned val;
ice->gpio.direction |= mask;
snd_ice1712_gpio_set_dir(ice, ice->gpio.direction);
snd_ice1712_gpio_set_mask(ice, ~mask);
snd_ice1712_gpio_write(ice, mask & bits);
val = snd_ice1712_gpio_read(ice);
val &= ~mask;
val |= mask & bits;
snd_ice1712_gpio_write(ice, val);
}
static inline int snd_ice1712_gpio_read_bits(struct snd_ice1712 *ice,