[PATCH v4 3/6] media: sun6i: Update default CSI_SCLK for A64
From: Jagan Teki <jagan@amarulasolutions.com>
Date: 2018-12-18 11:33:42
Also in:
linux-devicetree, linux-media, lkml
Subsystem:
allwinner a31 csi driver, media input infrastructure (v4l/dvb), the rest · Maintainers:
Yong Deng, Paul Kocialkowski, Mauro Carvalho Chehab, Linus Torvalds
Unfortunately A64 CSI cannot work with default CSI_SCLK rate. A64 BSP is using 300MHz clock rate as default csi clock, so sun6i_csi require explicit change to update CSI_SCLK rate to 300MHZ for A64 SoC's. So, set the clk_mod to 300MHz only for A64. Signed-off-by: Jagan Teki <jagan@amarulasolutions.com> --- drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c
index 9ff61896e4bb..91470edf7581 100644
--- a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c
+++ b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c@@ -822,6 +822,11 @@ static int sun6i_csi_resource_request(struct sun6i_csi_dev *sdev, return PTR_ERR(sdev->clk_mod); } + /* A64 require 300MHz mod clock to operate properly */ + if (of_device_is_compatible(pdev->dev.of_node, + "allwinner,sun50i-a64-csi")) + clk_set_rate_exclusive(sdev->clk_mod, 300000000); + sdev->clk_ram = devm_clk_get(&pdev->dev, "ram"); if (IS_ERR(sdev->clk_ram)) { dev_err(&pdev->dev, "Unable to acquire dram-csi clock\n");
--
2.18.0.321.gffc6fa0e3
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