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authorRobert Jarzmik <robert.jarzmik@free.fr>2009-03-15 14:10:54 +0100
committerMark Brown <broonie@opensource.wolfsonmicro.com>2009-03-15 20:20:37 +0000
commit26ade896b6ba3fd017ef4a26e71e7b7569222cb6 (patch)
tree274eeb6778bf399907ec2cce8a1422244d2bae7b /include/sound/pxa2xx-lib.h
parent77dd7e17b86bd81b3638e01d784a72652071508b (diff)
downloadop-kernel-dev-26ade896b6ba3fd017ef4a26e71e7b7569222cb6.zip
op-kernel-dev-26ade896b6ba3fd017ef4a26e71e7b7569222cb6.tar.gz
ASoC: Allow choice of ac97 gpio reset line
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>
Diffstat (limited to 'include/sound/pxa2xx-lib.h')
-rw-r--r--include/sound/pxa2xx-lib.h15
1 files changed, 15 insertions, 0 deletions
diff --git a/include/sound/pxa2xx-lib.h b/include/sound/pxa2xx-lib.h
index 2fd3d25..2c894b6 100644
--- a/include/sound/pxa2xx-lib.h
+++ b/include/sound/pxa2xx-lib.h
@@ -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
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