diff options
| author | Jarkko Nikula <jhnikula@gmail.com> | 2010-11-08 11:57:57 +0300 |
|---|---|---|
| committer | Liam Girdwood <lrg@slimlogic.co.uk> | 2010-11-10 00:38:49 +0300 |
| commit | 0656f6cf6c394ede78657595dd5a8ca7a1e64853 (patch) | |
| tree | 0b754974d127ff56952f47f49546c030b668fa8b /sound/soc/codecs/tpa6130a2.c | |
| parent | 414c73abfd0e565950f3b02336cf516147f0e104 (diff) | |
| download | linux-0656f6cf6c394ede78657595dd5a8ca7a1e64853.tar.xz | |
ASoC: tpa6130a2: Revisit power-up sequence
There are no known problems with current power-up sequence which first sets
the /shutdown pin high and then enables the supply. However, swap the order
so that the device is kept in shutdown/reset mode during the supply voltage
transition since slowly rising voltages can usually cause problems if the
device is not kept in reset.
Signed-off-by: Jarkko Nikula <jhnikula@gmail.com>
Cc: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
Diffstat (limited to 'sound/soc/codecs/tpa6130a2.c')
| -rw-r--r-- | sound/soc/codecs/tpa6130a2.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/sound/soc/codecs/tpa6130a2.c b/sound/soc/codecs/tpa6130a2.c index 329acc1a2074..e55317b35786 100644 --- a/sound/soc/codecs/tpa6130a2.c +++ b/sound/soc/codecs/tpa6130a2.c @@ -126,9 +126,6 @@ static int tpa6130a2_power(int power) mutex_lock(&data->mutex); if (power) { - /* Power on */ - if (data->power_gpio >= 0) - gpio_set_value(data->power_gpio, 1); ret = regulator_enable(data->supply); if (ret != 0) { @@ -136,6 +133,9 @@ static int tpa6130a2_power(int power) "Failed to enable supply: %d\n", ret); goto exit; } + /* Power on */ + if (data->power_gpio >= 0) + gpio_set_value(data->power_gpio, 1); data->power_state = 1; ret = tpa6130a2_initialize(); |