Compute the PLL parameters at runtime using the generic Aptina PLL
helper.
Signed-off-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
---
drivers/media/video/Kconfig | 1 +
drivers/media/video/mt9p031.c | 62 ++++++++++++++++++-----------------------
2 files changed, 28 insertions(+), 35 deletions(-)
diff --git a/drivers/media/video/Kconfig b/drivers/media/video/Kconfig
index 7867b0b..666836d 100644
--- a/drivers/media/video/Kconfig
+++ b/drivers/media/video/Kconfig
@@ -473,6 +473,7 @@ config VIDEO_OV7670
config VIDEO_MT9P031
tristate "Aptina MT9P031 support"
depends on I2C && VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API
+ select VIDEO_APTINA_PLL
---help---
This is a Video4Linux2 sensor-level driver for the Aptina
(Micron) mt9p031 5 Mpixel camera.
diff --git a/drivers/media/video/mt9p031.c b/drivers/media/video/mt9p031.c
index 52dd9f8..3bcd14b 100644
--- a/drivers/media/video/mt9p031.c
+++ b/drivers/media/video/mt9p031.c
@@ -27,6 +27,8 @@
#include <media/v4l2-device.h>
#include <media/v4l2-subdev.h>
+#include "aptina-pll.h"
+
#define MT9P031_PIXEL_ARRAY_WIDTH 2752
#define MT9P031_PIXEL_ARRAY_HEIGHT 2004
@@ -97,14 +99,6 @@
#define MT9P031_TEST_PATTERN_RED 0xa2
#define MT9P031_TEST_PATTERN_BLUE 0xa3
-struct mt9p031_pll_divs {
- u32 ext_freq;
- u32 target_freq;
- u8 m;
- u8 n;
- u8 p1;
-};
-
struct mt9p031 {
struct v4l2_subdev subdev;
struct media_pad pad;
@@ -115,7 +109,7 @@ struct mt9p031 {
struct mutex power_lock; /* lock to protect power_count */
int power_count;
- const struct mt9p031_pll_divs *pll;
+ struct aptina_pll pll;
/* Registers cache */
u16 output_control;
@@ -183,33 +177,31 @@ static int mt9p031_reset(struct mt9p031 *mt9p031)
0);
}
-/*
- * This static table uses ext_freq and vdd_io values to select suitable
- * PLL dividers m, n and p1 which have been calculated as specifiec in p36
- * of Aptina's mt9p031 datasheet. New values should be added here.
- */
-static const struct mt9p031_pll_divs mt9p031_divs[] = {
- /* ext_freq target_freq m n p1 */
- {21000000, 48000000, 26, 2, 6}
-};
-
-static int mt9p031_pll_get_divs(struct mt9p031 *mt9p031)
+static int mt9p031_pll_setup(struct mt9p031 *mt9p031)
{
+ static const struct aptina_pll_limits limits = {
+ .ext_clock_min = 6000000,
+ .ext_clock_max = 27000000,
+ .int_clock_min = 2000000,
+ .int_clock_max = 13500000,
+ .out_clock_min = 180000000,
+ .out_clock_max = 360000000,
+ .pix_clock_max = 96000000,
+ .n_min = 1,
+ .n_max = 64,
+ .m_min = 16,
+ .m_max = 255,
+ .p1_min = 1,
+ .p1_max = 128,
+ };
+
struct i2c_client *client = v4l2_get_subdevdata(&mt9p031->subdev);
- int i;
+ struct mt9p031_platform_data *pdata = mt9p031->pdata;
- for (i = 0; i < ARRAY_SIZE(mt9p031_divs); i++) {
- if (mt9p031_divs[i].ext_freq == mt9p031->pdata->ext_freq &&
- mt9p031_divs[i].target_freq == mt9p031->pdata->target_freq) {
- mt9p031->pll = &mt9p031_divs[i];
- return 0;
- }
- }
+ mt9p031->pll.ext_clock = pdata->ext_freq;
+ mt9p031->pll.pix_clock = pdata->target_freq;
- dev_err(&client->dev, "Couldn't find PLL dividers for ext_freq = %d, "
- "target_freq = %d\n", mt9p031->pdata->ext_freq,
- mt9p031->pdata->target_freq);
- return -EINVAL;
+ return aptina_pll_calculate(&client->dev, &limits, &mt9p031->pll);
}
static int mt9p031_pll_enable(struct mt9p031 *mt9p031)
@@ -223,11 +215,11 @@ static int mt9p031_pll_enable(struct mt9p031 *mt9p031)
return ret;
ret = mt9p031_write(client, MT9P031_PLL_CONFIG_1,
- (mt9p031->pll->m << 8) | (mt9p031->pll->n - 1));
+ (mt9p031->pll.m << 8) | (mt9p031->pll.n - 1));
if (ret < 0)
return ret;
- ret = mt9p031_write(client, MT9P031_PLL_CONFIG_2, mt9p031->pll->p1 - 1);
+ ret = mt9p031_write(client, MT9P031_PLL_CONFIG_2, mt9p031->pll.p1 - 1);
if (ret < 0)
return ret;
@@ -900,7 +892,7 @@ static int mt9p031_probe(struct i2c_client *client,
mt9p031->format.field = V4L2_FIELD_NONE;
mt9p031->format.colorspace = V4L2_COLORSPACE_SRGB;
- ret = mt9p031_pll_get_divs(mt9p031);
+ ret = mt9p031_pll_setup(mt9p031);
done:
if (ret < 0) {
--
1.7.3.4
--
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