From: Fabio Estevam festevam@denx.de
[ Upstream commit f02b53375e8f14b4c27a14f6e4fb6e89914fdc29 ]
The CSI1 PHY reference clock is limited to 125 MHz according to: i.MX 8M Mini Applications Processor Reference Manual, Rev. 3, 11/2020 Table 5-1. Clock Root Table (continued) / page 307 Slice Index n = 123 .
Currently the IMX8MM_CLK_CSI1_PHY_REF clock is configured to be fed directly from 1 GHz PLL2 , which overclocks them. Instead, drop the configuration altogether, which defaults the clock to 24 MHz REF clock input, which for the PHY reference clock is just fine.
Based on a patch from Marek Vasut for the imx8mn.
Fixes: e523b7c54c05 ("arm64: dts: imx8mm: Add CSI nodes") Signed-off-by: Fabio Estevam festevam@denx.de Reviewed-by: Marek Vasut marex@denx.de Reviewed-by: Marco Felsch m.felsch@pengutronix.de Reviewed-by: Adam Ford aford173@gmail.com Signed-off-by: Shawn Guo shawnguo@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- arch/arm64/boot/dts/freescale/imx8mm.dtsi | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-)
diff --git a/arch/arm64/boot/dts/freescale/imx8mm.dtsi b/arch/arm64/boot/dts/freescale/imx8mm.dtsi index d6b36f04f3dc1..1a647d4072ba0 100644 --- a/arch/arm64/boot/dts/freescale/imx8mm.dtsi +++ b/arch/arm64/boot/dts/freescale/imx8mm.dtsi @@ -1221,10 +1221,9 @@ compatible = "fsl,imx8mm-mipi-csi2"; reg = <0x32e30000 0x1000>; interrupts = <GIC_SPI 17 IRQ_TYPE_LEVEL_HIGH>; - assigned-clocks = <&clk IMX8MM_CLK_CSI1_CORE>, - <&clk IMX8MM_CLK_CSI1_PHY_REF>; - assigned-clock-parents = <&clk IMX8MM_SYS_PLL2_1000M>, - <&clk IMX8MM_SYS_PLL2_1000M>; + assigned-clocks = <&clk IMX8MM_CLK_CSI1_CORE>; + assigned-clock-parents = <&clk IMX8MM_SYS_PLL2_1000M>; + clock-frequency = <333000000>; clocks = <&clk IMX8MM_CLK_DISP_APB_ROOT>, <&clk IMX8MM_CLK_CSI1_ROOT>,