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From fc6044176be3518fee98430ebe36cc144d6feed2 Mon Sep 17 00:00:00 2001
From: Tuukka Toivonen <tuukka.o.toivonen@nokia.com>
Date: Thu, 2 Jul 2009 16:17:55 +0200
Subject: [PATCH 17/75] omap3isp: set CAM_MCLK to 172.8 MHz, allows exact 9.6 MHz for camera xclka/b
Camera cam_xclka and cam_xclkb clocks are generated by dividing
CAM_MCLK with an integer. We want to use 9.6 MHz for cameras,
so CAM_MCLK should be multiple of it. Otherwise the generated
frequency is slightly off due to rounding.
Signed-off-by: Tuukka Toivonen <tuukka.o.toivonen@nokia.com>
---
drivers/media/video/isp/isp.c | 14 ++++++++++++++
drivers/media/video/isp/isp.h | 1 +
drivers/media/video/isp/ispreg.h | 2 +-
3 files changed, 16 insertions(+), 1 deletions(-)
diff --git a/drivers/media/video/isp/isp.c b/drivers/media/video/isp/isp.c
index ceed870..9d46c01 100644
--- a/drivers/media/video/isp/isp.c
+++ b/drivers/media/video/isp/isp.c
@@ -2333,6 +2333,11 @@ static int isp_enable_clocks(struct device *dev)
dev_err(dev, "clk_enable cam_ick failed\n");
goto out_clk_enable_ick;
}
+ r = clk_set_rate(isp->dpll4_m5_ck, CM_CAM_MCLK_HZ/2);
+ if (r) {
+ dev_err(dev, "clk_set_rate for dpll4_m5_ck failed\n");
+ goto out_clk_enable_mclk;
+ }
r = clk_enable(isp->cam_mclk);
if (r) {
dev_err(dev, "clk_enable cam_mclk failed\n");
@@ -2499,6 +2504,7 @@ static int isp_remove(struct platform_device *pdev)
clk_put(isp->cam_ick);
clk_put(isp->cam_mclk);
+ clk_put(isp->dpll4_m5_ck);
clk_put(isp->csi2_fck);
clk_put(isp->l3_ick);
@@ -2674,6 +2680,12 @@ static int isp_probe(struct platform_device *pdev)
ret_err = PTR_ERR(isp->cam_mclk);
goto out_clk_get_mclk;
}
+ isp->dpll4_m5_ck = clk_get(&camera_dev, "dpll4_m5_ck");
+ if (IS_ERR(isp->dpll4_m5_ck)) {
+ dev_err(isp->dev, "clk_get dpll4_m5_ck failed\n");
+ ret_err = PTR_ERR(isp->dpll4_m5_ck);
+ goto out_clk_get_dpll4_m5_ck;
+ }
isp->csi2_fck = clk_get(&camera_dev, "csi2_96m_fck");
if (IS_ERR(isp->csi2_fck)) {
dev_err(isp->dev, "clk_get csi2_96m_fck failed\n");
@@ -2734,6 +2746,8 @@ out_request_irq:
out_clk_get_l3_ick:
clk_put(isp->csi2_fck);
out_clk_get_csi2_fclk:
+ clk_put(isp->dpll4_m5_ck);
+out_clk_get_dpll4_m5_ck:
clk_put(isp->cam_mclk);
out_clk_get_mclk:
clk_put(isp->cam_ick);
diff --git a/drivers/media/video/isp/isp.h b/drivers/media/video/isp/isp.h
index dc85d61..6b100b6 100644
--- a/drivers/media/video/isp/isp.h
+++ b/drivers/media/video/isp/isp.h
@@ -414,6 +414,7 @@ struct isp_device {
int ref_count;
struct clk *cam_ick;
struct clk *cam_mclk;
+ struct clk *dpll4_m5_ck;
struct clk *csi2_fck;
struct clk *l3_ick;
struct isp_interface_config *config;
diff --git a/drivers/media/video/isp/ispreg.h b/drivers/media/video/isp/ispreg.h
index 676a33d..1240e0e 100644
--- a/drivers/media/video/isp/ispreg.h
+++ b/drivers/media/video/isp/ispreg.h
@@ -116,7 +116,7 @@
#define ISP_32B_BOUNDARY_BUF 0xFFFFFFE0
#define ISP_32B_BOUNDARY_OFFSET 0x0000FFE0
-#define CM_CAM_MCLK_HZ 216000000
+#define CM_CAM_MCLK_HZ 172800000 /* Hz */
/* ISP Submodules offset */
--
1.6.6.1
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