3.11.10.7 -stable review patch.  If anyone has any objections, please let me 
know.

------------------

From: Stephen Warren <[email protected]>

commit e126a646f77fdd66978785cb0a3a5e46b07aee2e upstream.

The REVISION_ID register is not currently marked readable. snd_soc_read()
refuses to read the register, and hence probe() fails.

Fixes: d4807ad2c4c0 ("regmap: Check readable regs in _regmap_read")
[exposed the bug, by checking for readability]
Fixes: 685e42154dcf ("ASoC: Replace max98090 Device Driver")
[left out this register from the readable list]
Signed-off-by: Stephen Warren <[email protected]>
Signed-off-by: Mark Brown <[email protected]>
Signed-off-by: Luis Henriques <[email protected]>
---
 sound/soc/codecs/max98090.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sound/soc/codecs/max98090.c b/sound/soc/codecs/max98090.c
index b8f9fc5..29c3689 100644
--- a/sound/soc/codecs/max98090.c
+++ b/sound/soc/codecs/max98090.c
@@ -336,6 +336,7 @@ static bool max98090_readable_register(struct device *dev, 
unsigned int reg)
        case M98090_REG_RECORD_TDM_SLOT:
        case M98090_REG_SAMPLE_RATE:
        case M98090_REG_DMIC34_BIQUAD_BASE ... M98090_REG_DMIC34_BIQUAD_BASE + 
0x0E:
+       case M98090_REG_REVISION_ID:
                return true;
        default:
                return false;
-- 
1.9.1

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