diff options
| author | Lad, Prabhakar <prabhakar.csengg@gmail.com> | 2014-01-21 02:20:57 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <m.chehab@samsung.com> | 2014-02-24 13:12:53 -0300 |
| commit | ee2d16d7b3c95a65ed0434841568bd3f82712338 (patch) | |
| tree | 07e8c3bb0d77060d4eabcdf4ccde894e4eeb10b9 /drivers/media/i2c | |
| parent | a970449e40789a0056424668da5b56f57569ea73 (diff) | |
[media] mt9p031: Check return value of clk_prepare_enable/clk_set_rate
clk_set_rate(), clk_prepare_enable() functions can fail, so check the return
values to avoid surprises.
Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
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/mt9p031.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/drivers/media/i2c/mt9p031.c b/drivers/media/i2c/mt9p031.c index fec76d3f056c..dd7b258a9802 100644 --- a/drivers/media/i2c/mt9p031.c +++ b/drivers/media/i2c/mt9p031.c @@ -232,12 +232,15 @@ static int mt9p031_clk_setup(struct mt9p031 *mt9p031) struct i2c_client *client = v4l2_get_subdevdata(&mt9p031->subdev); struct mt9p031_platform_data *pdata = mt9p031->pdata; + int ret; mt9p031->clk = devm_clk_get(&client->dev, NULL); if (IS_ERR(mt9p031->clk)) return PTR_ERR(mt9p031->clk); - clk_set_rate(mt9p031->clk, pdata->ext_freq); + ret = clk_set_rate(mt9p031->clk, pdata->ext_freq); + if (ret < 0) + return ret; /* If the external clock frequency is out of bounds for the PLL use the * pixel clock divider only and disable the PLL. @@ -318,8 +321,14 @@ static int mt9p031_power_on(struct mt9p031 *mt9p031) return ret; /* Enable clock */ - if (mt9p031->clk) - clk_prepare_enable(mt9p031->clk); + if (mt9p031->clk) { + ret = clk_prepare_enable(mt9p031->clk); + if (ret) { + regulator_bulk_disable(ARRAY_SIZE(mt9p031->regulators), + mt9p031->regulators); + return ret; + } + } /* Now RESET_BAR must be high */ if (gpio_is_valid(mt9p031->reset)) { |