ASoC: msm8x10-wcd: Add suspend / resume for codec driver
Accessing codec registers when codec and underlying i2c bus is in sleep
mode can cause failure to access the registers, possibly resulting in
unrecoverable failures in the codec. Add the suspend and resume power
management routines in order to wait for system resume before accesing
codec registers.
CRs-fixed: 554056
Change-Id: I38320e2e73158ec0fbb4bb74b1f8e73dd4c58cde
Signed-off-by: Bhalchandra Gajare <gajare@codeaurora.org>
diff --git a/sound/soc/codecs/msm8x10-wcd.c b/sound/soc/codecs/msm8x10-wcd.c
index 942d095..7707aa0 100644
--- a/sound/soc/codecs/msm8x10-wcd.c
+++ b/sound/soc/codecs/msm8x10-wcd.c
@@ -3311,12 +3311,61 @@
{ },
};
+#ifdef CONFIG_PM
+static int msm8x10_wcd_i2c_resume(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct msm8x10_wcd_priv *priv = i2c_get_clientdata(client);
+ struct msm8x10_wcd *msm8x10;
+ int ret = 0;
+
+ if (client->addr == HELICON_CORE_0_I2C_ADDR) {
+ if (!priv || !priv->codec || !priv->codec->control_data) {
+ ret = -EINVAL;
+ dev_err(dev, "%s: Invalid client data\n", __func__);
+ goto rtn;
+ }
+ msm8x10 = priv->codec->control_data;
+ return wcd9xxx_core_res_resume(&msm8x10->wcd9xxx_res);
+ }
+rtn:
+ return 0;
+}
+
+static int msm8x10_wcd_i2c_suspend(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct msm8x10_wcd_priv *priv = i2c_get_clientdata(client);
+ struct msm8x10_wcd *msm8x10;
+ int ret = 0;
+
+ if (client->addr == HELICON_CORE_0_I2C_ADDR) {
+ if (!priv || !priv->codec || !priv->codec->control_data) {
+ ret = -EINVAL;
+ dev_err(dev, "%s: Invalid client data\n", __func__);
+ goto rtn;
+ }
+ msm8x10 = priv->codec->control_data;
+ return wcd9xxx_core_res_suspend(&msm8x10->wcd9xxx_res,
+ PMSG_SUSPEND);
+ }
+
+rtn:
+ return ret;
+}
+
+static SIMPLE_DEV_PM_OPS(msm8x1_wcd_pm_ops, msm8x10_wcd_i2c_suspend,
+ msm8x10_wcd_i2c_resume);
+#endif
static struct i2c_driver msm8x10_wcd_i2c_driver = {
.driver = {
.owner = THIS_MODULE,
.name = "msm8x10-wcd-i2c-core",
- .of_match_table = msm8x10_wcd_of_match
+ .of_match_table = msm8x10_wcd_of_match,
+#ifdef CONFIG_PM
+ .pm = &msm8x1_wcd_pm_ops,
+#endif
},
.id_table = msm8x10_wcd_id_table,
.probe = msm8x10_wcd_i2c_probe,