ASoC: max98090: make REVISION_ID readable
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: 685e42154d
("ASoC: Replace max98090 Device Driver")
[left out this register from the readable list]
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -336,6 +336,7 @@ static bool max98090_readable_register(struct device *dev, unsigned int reg)
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case M98090_REG_RECORD_TDM_SLOT:
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case M98090_REG_SAMPLE_RATE:
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case M98090_REG_DMIC34_BIQUAD_BASE ... M98090_REG_DMIC34_BIQUAD_BASE + 0x0E:
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case M98090_REG_REVISION_ID:
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return true;
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default:
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return false;
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