pm2301-charger: Wake device on register access
When USB Dedicated or Standard host chargers are plugged into
the device, chargealg attempts to disable the PM2301 AC charger,
However, disabling PM2301 was failing because of it being in
runtime suepend mode & LPN pin being low.
Signed-off-by: Rupesh Kumar <rupesh.kumar@stericsson.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Reviewed-by: Marcus COOPER <marcus.xm.cooper@stericsson.com>
Reviewed-by: Philippe LANGLAIS <philippe.langlais@stericsson.com>
diff --git a/drivers/power/pm2301_charger.c b/drivers/power/pm2301_charger.c
index ac03f9e..a1fc37e 100644
--- a/drivers/power/pm2301_charger.c
+++ b/drivers/power/pm2301_charger.c
@@ -128,13 +128,9 @@
static int pm2xxx_reg_read(struct pm2xxx_charger *pm2, int reg, u8 *val)
{
int ret;
- /*
- * When AC adaptor is unplugged, the host
- * must put LPN high to be able to
- * communicate by I2C with PM2301
- * and receive I2C "acknowledge" from PM2301.
- */
- mutex_lock(&pm2->lock);
+
+ /* wake up the device */
+ pm_runtime_get_sync(pm2->dev);
ret = i2c_smbus_read_i2c_block_data(pm2->config.pm2xxx_i2c, reg,
1, val);
@@ -142,7 +138,6 @@
dev_err(pm2->dev, "Error reading register at 0x%x\n", reg);
else
ret = 0;
- mutex_unlock(&pm2->lock);
return ret;
}
@@ -150,13 +145,9 @@
static int pm2xxx_reg_write(struct pm2xxx_charger *pm2, int reg, u8 val)
{
int ret;
- /*
- * When AC adaptor is unplugged, the host
- * must put LPN high to be able to
- * communicate by I2C with PM2301
- * and receive I2C "acknowledge" from PM2301.
- */
- mutex_lock(&pm2->lock);
+
+ /* wake up the device */
+ pm_runtime_get_sync(pm2->dev);
ret = i2c_smbus_write_i2c_block_data(pm2->config.pm2xxx_i2c, reg,
1, &val);
@@ -164,7 +155,6 @@
dev_err(pm2->dev, "Error writing register at 0x%x\n", reg);
else
ret = 0;
- mutex_unlock(&pm2->lock);
return ret;
}