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ASoC: Allow choice of ac97 gpio reset line

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As the PXA27x series allow 2 gpios to reset the ac97 bus,
allow through platform data configuration the definition of
the correct gpio which will reset the AC97 bus.

This comes from a silicon defect on the PXA27x series, where
the gpio must be manually controlled in warm reset cases.

Signed-off-by: Robert Jarzmik <rjarzmik@free.fr>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Robert Jarzmik
2009-03-15 14:10:54 +01:00
committed by Mark Brown
parent 77dd7e17b8
commit 26ade896b6
2 changed files with 81 additions and 5 deletions
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15
include/sound/pxa2xx-lib.h
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@ -42,4 +42,19 @@ extern int pxa2xx_ac97_hw_resume(void);
extern int pxa2xx_ac97_hw_probe(struct platform_device *dev);
extern void pxa2xx_ac97_hw_remove(struct platform_device *dev);
/* AC97 platform_data */
/**
* struct pxa2xx_ac97_platform_data - pxa ac97 platform data
* @reset_gpio: AC97 reset gpio (normally gpio113 or gpio95)
* a -1 value means no gpio will be used for reset
*
* Platform data should only be specified for pxa27x CPUs where a silicon bug
* prevents correct operation of the reset line. If not specified, the default
* behaviour is to consider gpio 113 as the AC97 reset line, which is the
* default on most boards.
*/
struct pxa2xx_ac97_platform_data {
int reset_gpio;
};
#endif