diff options
| author | Dillon Min <dillon.minfei@gmail.com> | 2021-05-04 07:09:53 +0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2021-06-02 11:52:33 +0200 |
| commit | 24786ccd9c80fdb05494aa4d90fcb8f34295c193 (patch) | |
| tree | 9fa263a7c1d193030c88dbad9cc5bfbc672295dd /drivers/media/i2c/ov2659.c | |
| parent | 2cb2705cf7ffe41dc5bd81290e4241bfb7f031cc (diff) | |
| download | linux-24786ccd9c80fdb05494aa4d90fcb8f34295c193.tar.bz2 | |
media: i2c: ov2659: Use clk_{prepare_enable,disable_unprepare}() to set xvclk on/off
On some platform(imx6q), xvclk might not switch on in advance,
also for power save purpose, xvclk should not be always on.
so, add clk_prepare_enable(), clk_disable_unprepare() in driver
side to set xvclk on/off at proper stage.
Add following changes:
- add 'struct clk *clk;' in 'struct ov2659 {}'
- enable xvclk in ov2659_power_on()
- disable xvclk in ov2659_power_off()
Signed-off-by: Dillon Min <dillon.minfei@gmail.com>
Acked-by: Lad Prabhakar <prabhakar.csengg@gmail.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Diffstat (limited to 'drivers/media/i2c/ov2659.c')
| -rw-r--r-- | drivers/media/i2c/ov2659.c | 24 |
1 files changed, 18 insertions, 6 deletions
diff --git a/drivers/media/i2c/ov2659.c b/drivers/media/i2c/ov2659.c index a3c8eae68486..7c1781f646ce 100644 --- a/drivers/media/i2c/ov2659.c +++ b/drivers/media/i2c/ov2659.c @@ -204,6 +204,7 @@ struct ov2659 { struct i2c_client *client; struct v4l2_ctrl_handler ctrls; struct v4l2_ctrl *link_frequency; + struct clk *clk; const struct ov2659_framesize *frame_size; struct sensor_register *format_ctrl_regs; struct ov2659_pll_ctrl pll; @@ -1268,6 +1269,8 @@ static int ov2659_power_off(struct device *dev) gpiod_set_value(ov2659->pwdn_gpio, 1); + clk_disable_unprepare(ov2659->clk); + return 0; } @@ -1276,9 +1279,17 @@ static int ov2659_power_on(struct device *dev) struct i2c_client *client = to_i2c_client(dev); struct v4l2_subdev *sd = i2c_get_clientdata(client); struct ov2659 *ov2659 = to_ov2659(sd); + int ret; dev_dbg(&client->dev, "%s:\n", __func__); + ret = clk_prepare_enable(ov2659->clk); + if (ret) { + dev_err(&client->dev, "%s: failed to enable clock\n", + __func__); + return ret; + } + gpiod_set_value(ov2659->pwdn_gpio, 0); if (ov2659->resetb_gpio) { @@ -1423,7 +1434,6 @@ static int ov2659_probe(struct i2c_client *client) const struct ov2659_platform_data *pdata = ov2659_get_pdata(client); struct v4l2_subdev *sd; struct ov2659 *ov2659; - struct clk *clk; int ret; if (!pdata) { @@ -1438,11 +1448,11 @@ static int ov2659_probe(struct i2c_client *client) ov2659->pdata = pdata; ov2659->client = client; - clk = devm_clk_get(&client->dev, "xvclk"); - if (IS_ERR(clk)) - return PTR_ERR(clk); + ov2659->clk = devm_clk_get(&client->dev, "xvclk"); + if (IS_ERR(ov2659->clk)) + return PTR_ERR(ov2659->clk); - ov2659->xvclk_frequency = clk_get_rate(clk); + ov2659->xvclk_frequency = clk_get_rate(ov2659->clk); if (ov2659->xvclk_frequency < 6000000 || ov2659->xvclk_frequency > 27000000) return -EINVAL; @@ -1504,7 +1514,9 @@ static int ov2659_probe(struct i2c_client *client) ov2659->frame_size = &ov2659_framesizes[2]; ov2659->format_ctrl_regs = ov2659_formats[0].format_ctrl_regs; - ov2659_power_on(&client->dev); + ret = ov2659_power_on(&client->dev); + if (ret < 0) + goto error; ret = ov2659_detect(sd); if (ret < 0) |