[RFC] [PATCH] media: marvell-ccic: use devm to release clk

lbyang
2013-11-05T09:33:40Z

From: Libin Yang <lbyang@marvell.com>
Date: Tue, 5 Nov 2013 16:29:07 +0800
Subject: [PATCH] media: marvell-ccic: use devm to release clk

This patch uses devm to release the clks instead of releasing
manually.
And it adds enable/disable mipi_clk when getting its rate.

Signed-off-by: Libin Yang <lbyang@marvell.com>
---
drivers/media/platform/marvell-ccic/mmp-driver.c | 39
+++++-----------------
1 file changed, 8 insertions(+), 31 deletions(-)

diff --git a/drivers/media/platform/marvell-ccic/mmp-driver.c
b/drivers/media/platform/marvell-ccic/mmp-driver.c
index 70cb57f..054507f 100644
--- a/drivers/media/platform/marvell-ccic/mmp-driver.c
+++ b/drivers/media/platform/marvell-ccic/mmp-driver.c
@@ -142,12 +142,6 @@ static int mmpcam_power_up(struct mcam_camera
*mcam)
struct mmp_camera *cam = mcam_to_cam(mcam);
struct mmp_camera_platform_data *pdata;

- if (mcam->bus_type == V4L2_MBUS_CSI2) {
- cam->mipi_clk = devm_clk_get(mcam->dev, "mipi");
- if ((IS_ERR(cam->mipi_clk) && mcam->dphy[2] == 0))
- return PTR_ERR(cam->mipi_clk);
- }
-
/*
* Turn on power and clocks to the controller.
*/
@@ -186,12 +180,6 @@ static void mmpcam_power_down(struct mcam_camera
*mcam)
gpio_set_value(pdata->sensor_power_gpio, 0);
gpio_set_value(pdata->sensor_reset_gpio, 0);

- if (mcam->bus_type == V4L2_MBUS_CSI2 && !IS_ERR(cam->mipi_clk)) {
- if (cam->mipi_clk)
- devm_clk_put(mcam->dev, cam->mipi_clk);
- cam->mipi_clk = NULL;
- }
-
mcam_clk_disable(mcam);
}

@@ -292,8 +280,9 @@ void mmpcam_calc_dphy(struct mcam_camera *mcam)
return;

/* get the escape clk, this is hard coded */
+ clk_prepare_enable(cam->mipi_clk);
tx_clk_esc = (clk_get_rate(cam->mipi_clk) / 1000000) / 12;
-
+ clk_disable_unprepare(cam->mipi_clk);
/*
* dphy[2] - CSI2_DPHY6:
* bit 0 ~ bit 7: CK Term Enable
@@ -325,19 +314,6 @@ static irqreturn_t mmpcam_irq(int irq, void *data)
return IRQ_RETVAL(handled);
}

-static void mcam_deinit_clk(struct mcam_camera *mcam)
-{
- unsigned int i;
-
- for (i = 0; i < NR_MCAM_CLK; i++) {
- if (!IS_ERR(mcam->clk[i])) {
- if (mcam->clk[i])
- devm_clk_put(mcam->dev, mcam->clk[i]);
- }
- mcam->clk[i] = NULL;
- }
-}
-
static void mcam_init_clk(struct mcam_camera *mcam)
{
unsigned int i;
@@ -371,7 +347,6 @@ static int mmpcam_probe(struct platform_device
*pdev)
if (cam == NULL)
return -ENOMEM;
cam->pdev = pdev;
- cam->mipi_clk = NULL;
INIT_LIST_HEAD(&cam->devlist);

mcam = &cam->mcam;
@@ -387,6 +362,11 @@ static int mmpcam_probe(struct platform_device
*pdev)
mcam->mclk_div = pdata->mclk_div;
mcam->bus_type = pdata->bus_type;
mcam->dphy = pdata->dphy;
+ if (mcam->bus_type == V4L2_MBUS_CSI2) {
+ cam->mipi_clk = devm_clk_get(mcam->dev, "mipi");
+ if ((IS_ERR(cam->mipi_clk) && mcam->dphy[2] == 0))
+ return PTR_ERR(cam->mipi_clk);
+ }
mcam->mipi_enabled = false;
mcam->lane = pdata->lane;
mcam->chip_id = MCAM_ARMADA610;
@@ -444,7 +424,7 @@ static int mmpcam_probe(struct platform_device
*pdev)
*/
ret = mmpcam_power_up(mcam);
if (ret)
- goto out_deinit_clk;
+ return ret;
ret = mccic_register(mcam);
if (ret)
goto out_power_down;
@@ -469,8 +449,6 @@ out_unregister:
mccic_shutdown(mcam);
out_power_down:
mmpcam_power_down(mcam);
-out_deinit_clk:
- mcam_deinit_clk(mcam);
return ret;
}

@@ -482,7 +460,6 @@ static int mmpcam_remove(struct mmp_camera *cam)
mmpcam_remove_device(cam);
mccic_shutdown(mcam);
mmpcam_power_down(mcam);
- mcam_deinit_clk(mcam);
return 0;
}

--
1.7.9.5