[v3,05/11] ASoC: rt5677: Mark reg RT5677_PWR_ANLG2 as volatile
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Message ID 20191106011335.223061-6-cujomalainey@chromium.org
State New
Headers show
Series
  • Add Samus Hotwording for RT5677
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Commit Message

Curtis Malainey Nov. 6, 2019, 1:13 a.m. UTC
From: Ben Zhang <benzh@chromium.org>

The codec dies when RT5677_PWR_ANLG2(MX-64h) is set to 0xACE1
while it's streaming audio over SPI. The DSP firmware turns
on PLL2 (MX-64 bit 8) when SPI streaming starts.  However regmap
does not believe that register can change by itself. When
BST1 (bit 15) is turned on with regmap_update_bits(), it doesn't
read the register first before write, so PLL2 power bit is
cleared by accident.

Marking MX-64h as volatile in regmap solved the issue.

Signed-off-by: Ben Zhang <benzh@chromium.org>
Signed-off-by: Curtis Malainey <cujomalainey@chromium.org>
---
 sound/soc/codecs/rt5677.c | 1 +
 1 file changed, 1 insertion(+)

Patch
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diff --git a/sound/soc/codecs/rt5677.c b/sound/soc/codecs/rt5677.c
index ea235f3874ca..e5db9dc60378 100644
--- a/sound/soc/codecs/rt5677.c
+++ b/sound/soc/codecs/rt5677.c
@@ -302,6 +302,7 @@  static bool rt5677_volatile_register(struct device *dev, unsigned int reg)
 	case RT5677_I2C_MASTER_CTRL7:
 	case RT5677_I2C_MASTER_CTRL8:
 	case RT5677_HAP_GENE_CTRL2:
+	case RT5677_PWR_ANLG2: /* Modified by DSP firmware */
 	case RT5677_PWR_DSP_ST:
 	case RT5677_PRIV_DATA:
 	case RT5677_ASRC_22: