diff options
| author | Peter Ujfalusi <peter.ujfalusi@ti.com> | 2014-04-03 10:54:41 (GMT) |
|---|---|---|
| committer | Lee Jones <lee.jones@linaro.org> | 2014-06-03 07:11:20 (GMT) |
| commit | 68bab8662f49b9e158f1d32f11becd4e48c04079 (patch) | |
| tree | 7d10c7dd0ca07d390f00982b10079ffdab069975 /drivers/mfd/twl6040.c | |
| parent | 11e38e11afcdd598d0978746924a001e3e7cb723 (diff) | |
| download | linux-68bab8662f49b9e158f1d32f11becd4e48c04079.tar.xz | |
mfd: twl6040: Optional clk32k clock handling
In certain boards the source for the clk32k clock can be gated. In these
boards the clk32k clock can be provided to the driver and it is going to be
enabled/disabled when it is needed.
If the clk32k clock is not provided the driver will assume that it is always
running.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Diffstat (limited to 'drivers/mfd/twl6040.c')
| -rw-r--r-- | drivers/mfd/twl6040.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/mfd/twl6040.c b/drivers/mfd/twl6040.c index cb37bb8..574774d 100644 --- a/drivers/mfd/twl6040.c +++ b/drivers/mfd/twl6040.c @@ -291,6 +291,8 @@ int twl6040_power(struct twl6040 *twl6040, int on) if (twl6040->power_count++) goto out; + clk_prepare_enable(twl6040->clk32k); + /* Allow writes to the chip */ regcache_cache_only(twl6040->regmap, false); @@ -346,6 +348,8 @@ int twl6040_power(struct twl6040 *twl6040, int on) twl6040->sysclk = 0; twl6040->mclk = 0; + + clk_disable_unprepare(twl6040->clk32k); } out: @@ -644,6 +648,12 @@ static int twl6040_probe(struct i2c_client *client, i2c_set_clientdata(client, twl6040); + twl6040->clk32k = devm_clk_get(&client->dev, "clk32k"); + if (IS_ERR(twl6040->clk32k)) { + dev_info(&client->dev, "clk32k is not handled\n"); + twl6040->clk32k = NULL; + } + twl6040->supplies[0].supply = "vio"; twl6040->supplies[1].supply = "v2v1"; ret = devm_regulator_bulk_get(&client->dev, TWL6040_NUM_SUPPLIES, |