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[media] mt9p031: Use the common clock framework

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Configure the device external clock using the common clock framework
instead of a board code callback function.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Sakari Ailus <sakari.ailus@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Laurent Pinchart 2012-12-21 16:11:55 -03:00 committed by Mauro Carvalho Chehab
parent 97f212767a
commit d67492585d
2 changed files with 14 additions and 9 deletions
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21
drivers/media/i2c/mt9p031.c
View File

@ -12,6 +12,7 @@
* published by the Free Software Foundation.
*/
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/gpio.h>
@ -122,6 +123,7 @@ struct mt9p031 {
struct mutex power_lock; /* lock to protect power_count */
int power_count;
struct clk *clk;
struct regulator *vaa;
struct regulator *vdd;
struct regulator *vdd_io;
@ -200,7 +202,7 @@ static int mt9p031_reset(struct mt9p031 *mt9p031)
0);
}
static int mt9p031_pll_setup(struct mt9p031 *mt9p031)
static int mt9p031_clk_setup(struct mt9p031 *mt9p031)
{
static const struct aptina_pll_limits limits = {
.ext_clock_min = 6000000,
@ -221,6 +223,12 @@ static int mt9p031_pll_setup(struct mt9p031 *mt9p031)
struct i2c_client *client = v4l2_get_subdevdata(&mt9p031->subdev);
struct mt9p031_platform_data *pdata = mt9p031->pdata;
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);
mt9p031->pll.ext_clock = pdata->ext_freq;
mt9p031->pll.pix_clock = pdata->target_freq;
@ -275,9 +283,8 @@ static int mt9p031_power_on(struct mt9p031 *mt9p031)
regulator_enable(mt9p031->vaa);
/* Emable clock */
if (mt9p031->pdata->set_xclk)
mt9p031->pdata->set_xclk(&mt9p031->subdev,
mt9p031->pdata->ext_freq);
if (mt9p031->clk)
clk_prepare_enable(mt9p031->clk);
/* Now RESET_BAR must be high */
if (mt9p031->reset != -1) {
@ -299,8 +306,8 @@ static void mt9p031_power_off(struct mt9p031 *mt9p031)
regulator_disable(mt9p031->vdd_io);
regulator_disable(mt9p031->vdd);
if (mt9p031->pdata->set_xclk)
mt9p031->pdata->set_xclk(&mt9p031->subdev, 0);
if (mt9p031->clk)
clk_disable_unprepare(mt9p031->clk);
}
static int __mt9p031_set_power(struct mt9p031 *mt9p031, bool on)
@ -1033,7 +1040,7 @@ static int mt9p031_probe(struct i2c_client *client,
mt9p031->reset = pdata->reset;
}
ret = mt9p031_pll_setup(mt9p031);
ret = mt9p031_clk_setup(mt9p031);
done:
if (ret < 0) {

2
include/media/mt9p031.h
View File

@ -5,13 +5,11 @@ struct v4l2_subdev;
/*
* struct mt9p031_platform_data - MT9P031 platform data
* @set_xclk: Clock frequency set callback
* @reset: Chip reset GPIO (set to -1 if not used)
* @ext_freq: Input clock frequency
* @target_freq: Pixel clock frequency
*/
struct mt9p031_platform_data {
int (*set_xclk)(struct v4l2_subdev *subdev, int hz);
int reset;
int ext_freq;
int target_freq;