arm64: dts: imx8mm: Drop CSI1 PHY reference clock configuration

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>

diff --git a/arch/arm64/boot/dts/freescale/imx8mm.dtsi b/arch/arm64/boot/dts/freescale/imx8mm.dtsi
index d6b36f04f3dc155e19409cd194c849f12d3b4993..1a647d4072ba0c80c8542e47880e9dc8a391c3c1 100644 (file)
--- 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>,