[PATCH] ARM: dts: imx6: RDU2: assign video PLL as input to LDB

[PATCH] ARM: dts: imx6: RDU2: assign video PLL as input to LDB

[Lucas Stach]

Currently we don't ensure that the LDB is clocked from the video PLL
and relied on the bootloader to do the correct setup. This isn't always
true, in which case we would run with a vastly different video clock
than the desired one. Fix this by assigning the proper parent to the
LDB.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
---
 arch/arm/boot/dts/imx6qdl-zii-rdu2.dtsi | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/arm/boot/dts/imx6qdl-zii-rdu2.dtsi b/arch/arm/boot/dts/imx6qdl-zii-rdu2.dtsi
index 0075637f9b0b..20350e803377 100644
--- a/arch/arm/boot/dts/imx6qdl-zii-rdu2.dtsi
+++ b/arch/arm/boot/dts/imx6qdl-zii-rdu2.dtsi
@@ -216,6 +216,13 @@
 	};
 };
 
+&clks {
+	assigned-clocks = <&clks IMX6QDL_CLK_LDB_DI0_SEL>,
+	                  <&clks IMX6QDL_CLK_LDB_DI1_SEL>;
+	assigned-clock-parents = <&clks IMX6QDL_CLK_PLL5_VIDEO_DIV>,
+	                         <&clks IMX6QDL_CLK_PLL5_VIDEO_DIV>;
+};
+
 &cpu0 {
 	fsl,soc-operating-points = <
 		/* ARM kHz  SOC-PU uV */
-- 
2.20.1


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

Re: [PATCH] ARM: dts: imx6: RDU2: assign video PLL as input to LDB

[Shawn Guo]

On Fri, Mar 13, 2020 at 10:58:04AM +0100, Lucas Stach wrote:
> Currently we don't ensure that the LDB is clocked from the video PLL
> and relied on the bootloader to do the correct setup. This isn't always
> true, in which case we would run with a vastly different video clock
> than the desired one. Fix this by assigning the proper parent to the
> LDB.
> 
> Signed-off-by: Lucas Stach <l.stach@pengutronix.de>

Applied, thanks.

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel