This is a note to let you know that I've just added the patch titled arm64: dts: imx8mm-kontron: Make sure SOC and DRAM supply voltages are correct to the 5.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: arm64-dts-imx8mm-kontron-make-sure-soc-and-dram-supply-voltages-are-correct.patch and it can be found in the queue-5.14 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 82a4f329b133ad0de66bee12c0be5c67bb8aa188 Mon Sep 17 00:00:00 2001 From: Frieder Schrempf <frieder.schrempf@xxxxxxxxxx> Date: Fri, 15 Oct 2021 14:48:36 +0200 Subject: arm64: dts: imx8mm-kontron: Make sure SOC and DRAM supply voltages are correct From: Frieder Schrempf <frieder.schrempf@xxxxxxxxxx> commit 82a4f329b133ad0de66bee12c0be5c67bb8aa188 upstream. It looks like the voltages for the SOC and DRAM supply weren't properly validated before. The datasheet and uboot-imx code tells us that VDD_SOC should be 800 mV in suspend and 850 mV in run mode. VDD_DRAM should be 950 mV for DDR clock frequencies of up to 1.5 GHz. Let's fix these values to make sure the voltages are within the required range. Fixes: 8668d8b2e67f ("arm64: dts: Add the Kontron i.MX8M Mini SoMs and baseboards") Cc: stable@xxxxxxxxxxxxxxx Signed-off-by: Frieder Schrempf <frieder.schrempf@xxxxxxxxxx> Signed-off-by: Shawn Guo <shawnguo@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- arch/arm64/boot/dts/freescale/imx8mm-kontron-n801x-som.dtsi | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) --- a/arch/arm64/boot/dts/freescale/imx8mm-kontron-n801x-som.dtsi +++ b/arch/arm64/boot/dts/freescale/imx8mm-kontron-n801x-som.dtsi @@ -91,10 +91,12 @@ reg_vdd_soc: BUCK1 { regulator-name = "buck1"; regulator-min-microvolt = <800000>; - regulator-max-microvolt = <900000>; + regulator-max-microvolt = <850000>; regulator-boot-on; regulator-always-on; regulator-ramp-delay = <3125>; + nxp,dvs-run-voltage = <850000>; + nxp,dvs-standby-voltage = <800000>; }; reg_vdd_arm: BUCK2 { @@ -111,7 +113,7 @@ reg_vdd_dram: BUCK3 { regulator-name = "buck3"; regulator-min-microvolt = <850000>; - regulator-max-microvolt = <900000>; + regulator-max-microvolt = <950000>; regulator-boot-on; regulator-always-on; }; Patches currently in stable-queue which might be from frieder.schrempf@xxxxxxxxxx are queue-5.14/arm64-dts-imx8mm-kontron-fix-polarity-of-reg_rst_eth2.patch queue-5.14/arm64-dts-imx8mm-kontron-fix-connection-type-for-vsc8531-rgmii-phy.patch queue-5.14/arm64-dts-imx8mm-kontron-make-sure-soc-and-dram-supply-voltages-are-correct.patch queue-5.14/arm64-dts-imx8mm-kontron-set-lower-limit-of-vdd_snvs-to-800-mv.patch queue-5.14/arm64-dts-imx8mm-kontron-fix-can-spi-clock-frequency.patch