diff options
| author | Laurent Pinchart <laurent.pinchart@ideasonboard.com> | 2014-02-08 13:33:46 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <m.chehab@samsung.com> | 2014-02-24 13:11:40 -0300 |
| commit | b16fdd53de8f46da425a87f7175276d1c8d92355 (patch) | |
| tree | a4a6087ed6c9dab7425ee694f16ce800dc9b3f5b /drivers/media/i2c | |
| parent | b2b3593e331cce1718d7388f8a1182b5195be5fb (diff) | |
| download | linux-b16fdd53de8f46da425a87f7175276d1c8d92355.tar.bz2 | |
[media] mt9t001: Add clock support
The sensor needs a master clock, handle it explictly in the driver.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Diffstat (limited to 'drivers/media/i2c')
| -rw-r--r-- | drivers/media/i2c/mt9t001.c | 27 |
1 files changed, 25 insertions, 2 deletions
diff --git a/drivers/media/i2c/mt9t001.c b/drivers/media/i2c/mt9t001.c index 9a0bb063aa9b..422e068f5f1b 100644 --- a/drivers/media/i2c/mt9t001.c +++ b/drivers/media/i2c/mt9t001.c @@ -12,6 +12,7 @@ * published by the Free Software Foundation. */ +#include <linux/clk.h> #include <linux/i2c.h> #include <linux/log2.h> #include <linux/module.h> @@ -118,6 +119,7 @@ struct mt9t001 { struct v4l2_subdev subdev; struct media_pad pad; + struct clk *clk; struct regulator_bulk_data regulators[2]; struct mutex power_lock; /* lock to protect power_count */ @@ -189,9 +191,21 @@ static int mt9t001_reset(struct mt9t001 *mt9t001) static int mt9t001_power_on(struct mt9t001 *mt9t001) { + int ret; + /* Bring up the supplies */ - return regulator_bulk_enable(ARRAY_SIZE(mt9t001->regulators), - mt9t001->regulators); + ret = regulator_bulk_enable(ARRAY_SIZE(mt9t001->regulators), + mt9t001->regulators); + if (ret < 0) + return ret; + + /* Enable clock */ + ret = clk_prepare_enable(mt9t001->clk); + if (ret < 0) + regulator_bulk_disable(ARRAY_SIZE(mt9t001->regulators), + mt9t001->regulators); + + return ret; } static void mt9t001_power_off(struct mt9t001 *mt9t001) @@ -199,6 +213,9 @@ static void mt9t001_power_off(struct mt9t001 *mt9t001) regulator_bulk_disable(ARRAY_SIZE(mt9t001->regulators), mt9t001->regulators); + clk_disable_unprepare(mt9t001->clk); +} + static int __mt9t001_set_power(struct mt9t001 *mt9t001, bool on) { struct i2c_client *client = v4l2_get_subdevdata(&mt9t001->subdev); @@ -854,6 +871,12 @@ static int mt9t001_probe(struct i2c_client *client, return ret; } + mt9t001->clk = devm_clk_get(&client->dev, NULL); + if (IS_ERR(mt9t001->clk)) { + dev_err(&client->dev, "Unable to get clock\n"); + return PTR_ERR(mt9t001->clk); + } + v4l2_ctrl_handler_init(&mt9t001->ctrls, ARRAY_SIZE(mt9t001_ctrls) + ARRAY_SIZE(mt9t001_gains) + 4); |