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authorAkshu Agrawal <akshu.agrawal@amd.com>2017-11-09 20:35:51 +0300
committerMark Brown <broonie@kernel.org>2017-11-09 20:40:59 +0300
commit0c279a590fde66f4307c93ab2d4f680c7f41bbfa (patch)
tree16ecfcd5ee7114b0cc674bf7fdde06be7600d99f /sound
parent50f510a33c7c906f8f75b02e3d1104984ebf6f78 (diff)
downloadlinux-0c279a590fde66f4307c93ab2d4f680c7f41bbfa.tar.xz
ASoC: rt5645: Wait for 400msec before concluding on value of RT5645_VENDOR_ID2
Minimum time required between power On of codec and read of RT5645_VENDOR_ID2 is 400msec. We should wait that long before reading the value. TEST=Cold boot the device and check for sound device. Signed-off-by: Akshu Agrawal <akshu.agrawal@amd.com> Signed-off-by: Bard Liao <bardliao@realtek.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound')
-rw-r--r--sound/soc/codecs/rt5645.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/sound/soc/codecs/rt5645.c b/sound/soc/codecs/rt5645.c
index 23cc2cb8393f..5f24df4fae8e 100644
--- a/sound/soc/codecs/rt5645.c
+++ b/sound/soc/codecs/rt5645.c
@@ -55,6 +55,8 @@ MODULE_PARM_DESC(quirk, "RT5645 pdata quirk override");
#define RT5645_HWEQ_NUM 57
+#define TIME_TO_POWER_MS 400
+
static const struct regmap_range_cfg rt5645_ranges[] = {
{
.name = "PR",
@@ -3784,6 +3786,12 @@ static int rt5645_i2c_probe(struct i2c_client *i2c,
ret);
return ret;
}
+
+ /*
+ * Read after 400msec, as it is the interval required between
+ * read and power On.
+ */
+ msleep(TIME_TO_POWER_MS);
regmap_read(regmap, RT5645_VENDOR_ID2, &val);
switch (val) {