ASoC: tpa6130a2: Fix unbalanced regulator disables

This driver has unbalanced regulator_disable when doing module loading and
unloading. This is because tpa6130a2_probe followed by tpa6130a2_remove
calls twice tpa6130a2_power(0). Fix this by implementing a state checking
in tpa6130a2_power.

Signed-off-by: Jarkko Nikula <jhnikula@gmail.com>
Cc: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>

diff --git a/sound/soc/codecs/tpa6130a2.c b/sound/soc/codecs/tpa6130a2.c
index 329acc1..83b5631 100644 (file)
--- a/sound/soc/codecs/tpa6130a2.c
+++ b/sound/soc/codecs/tpa6130a2.c
@@ -125,7 +125,7 @@ static int tpa6130a2_power(int power)
        data = i2c_get_clientdata(tpa6130a2_client);
 
        mutex_lock(&data->mutex);
-       if (power) {
+       if (power && !data->power_state) {
                /* Power on */
                if (data->power_gpio >= 0)
                        gpio_set_value(data->power_gpio, 1);
@@ -153,7 +153,7 @@ static int tpa6130a2_power(int power)
                val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
                val &= ~TPA6130A2_SWS;
                tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);
-       } else {
+       } else if (!power && data->power_state) {
                /* set SWS */
                val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
                val |= TPA6130A2_SWS;