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[media] omap3isp: Prepare/unprepare clocks before/after enable/disable

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Clock enable (disable) is split in two operations, prepare and enable
(disable and unprepare). Perform both when enabling/disabling the ISP
clocks.

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 2012-10-25 06:29:24 -03:00 committed by Mauro Carvalho Chehab
parent e023a11342
commit b057c3c322
1 changed files with 13 additions and 12 deletions
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25
drivers/media/platform/omap3isp/isp.c
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@ -1332,7 +1332,8 @@ void omap3isp_subclk_disable(struct isp_device *isp,
* isp_enable_clocks - Enable ISP clocks
* @isp: OMAP3 ISP device
*
* Return 0 if successful, or clk_enable return value if any of tthem fails.
* Return 0 if successful, or clk_prepare_enable return value if any of them
* fails.
*/
static int isp_enable_clocks(struct isp_device *isp)
{
@ -1354,9 +1355,9 @@ static int isp_enable_clocks(struct isp_device *isp)
else
divisor = 2;
r = clk_enable(isp->clock[ISP_CLK_CAM_ICK]);
r = clk_prepare_enable(isp->clock[ISP_CLK_CAM_ICK]);
if (r) {
dev_err(isp->dev, "clk_enable cam_ick failed\n");
dev_err(isp->dev, "failed to enable cam_ick clock\n");
goto out_clk_enable_ick;
}
r = clk_set_rate(isp->clock[ISP_CLK_DPLL4_M5_CK],
@ -1365,9 +1366,9 @@ static int isp_enable_clocks(struct isp_device *isp)
dev_err(isp->dev, "clk_set_rate for dpll4_m5_ck failed\n");
goto out_clk_enable_mclk;
}
r = clk_enable(isp->clock[ISP_CLK_CAM_MCLK]);
r = clk_prepare_enable(isp->clock[ISP_CLK_CAM_MCLK]);
if (r) {
dev_err(isp->dev, "clk_enable cam_mclk failed\n");
dev_err(isp->dev, "failed to enable cam_mclk clock\n");
goto out_clk_enable_mclk;
}
rate = clk_get_rate(isp->clock[ISP_CLK_CAM_MCLK]);
@ -1375,17 +1376,17 @@ static int isp_enable_clocks(struct isp_device *isp)
dev_warn(isp->dev, "unexpected cam_mclk rate:\n"
" expected : %d\n"
" actual : %ld\n", CM_CAM_MCLK_HZ, rate);
r = clk_enable(isp->clock[ISP_CLK_CSI2_FCK]);
r = clk_prepare_enable(isp->clock[ISP_CLK_CSI2_FCK]);
if (r) {
dev_err(isp->dev, "clk_enable csi2_fck failed\n");
dev_err(isp->dev, "failed to enable csi2_fck clock\n");
goto out_clk_enable_csi2_fclk;
}
return 0;
out_clk_enable_csi2_fclk:
clk_disable(isp->clock[ISP_CLK_CAM_MCLK]);
clk_disable_unprepare(isp->clock[ISP_CLK_CAM_MCLK]);
out_clk_enable_mclk:
clk_disable(isp->clock[ISP_CLK_CAM_ICK]);
clk_disable_unprepare(isp->clock[ISP_CLK_CAM_ICK]);
out_clk_enable_ick:
return r;
}
@ -1396,9 +1397,9 @@ out_clk_enable_ick:
*/
static void isp_disable_clocks(struct isp_device *isp)
{
clk_disable(isp->clock[ISP_CLK_CAM_ICK]);
clk_disable(isp->clock[ISP_CLK_CAM_MCLK]);
clk_disable(isp->clock[ISP_CLK_CSI2_FCK]);
clk_disable_unprepare(isp->clock[ISP_CLK_CAM_ICK]);
clk_disable_unprepare(isp->clock[ISP_CLK_CAM_MCLK]);
clk_disable_unprepare(isp->clock[ISP_CLK_CSI2_FCK]);
}
static const char *isp_clocks[] = {