projects / thirdparty / kernel / stable-queue.git / blame
| Commit | Line | Data |
|---|---|---|
| 36d1ee6e GKH |
1 | From 82a4f329b133ad0de66bee12c0be5c67bb8aa188 Mon Sep 17 00:00:00 2001 |
| 2 | From: Frieder Schrempf <frieder.schrempf@kontron.de> | |
| 3 | Date: Fri, 15 Oct 2021 14:48:36 +0200 | |
| 4 | Subject: arm64: dts: imx8mm-kontron: Make sure SOC and DRAM supply voltages are correct | |
| 5 | ||
| 6 | From: Frieder Schrempf <frieder.schrempf@kontron.de> | |
| 7 | ||
| 8 | commit 82a4f329b133ad0de66bee12c0be5c67bb8aa188 upstream. | |
| 9 | ||
| 10 | It looks like the voltages for the SOC and DRAM supply weren't properly | |
| 11 | validated before. The datasheet and uboot-imx code tells us that VDD_SOC | |
| 12 | should be 800 mV in suspend and 850 mV in run mode. VDD_DRAM should be | |
| 13 | 950 mV for DDR clock frequencies of up to 1.5 GHz. | |
| 14 | ||
| 15 | Let's fix these values to make sure the voltages are within the required | |
| 16 | range. | |
| 17 | ||
| 18 | Fixes: 8668d8b2e67f ("arm64: dts: Add the Kontron i.MX8M Mini SoMs and baseboards") | |
| 19 | Cc: stable@vger.kernel.org | |
| 20 | Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de> | |
| 21 | Signed-off-by: Shawn Guo <shawnguo@kernel.org> | |
| 22 | Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> | |
| 23 | --- | |
| 24 | arch/arm64/boot/dts/freescale/imx8mm-kontron-n801x-som.dtsi | 6 ++++-- | |
| 25 | 1 file changed, 4 insertions(+), 2 deletions(-) | |
| 26 | ||
| 27 | --- a/arch/arm64/boot/dts/freescale/imx8mm-kontron-n801x-som.dtsi | |
| 28 | +++ b/arch/arm64/boot/dts/freescale/imx8mm-kontron-n801x-som.dtsi | |
| 29 | @@ -91,10 +91,12 @@ | |
| 30 | reg_vdd_soc: BUCK1 { | |
| 31 | regulator-name = "buck1"; | |
| 32 | regulator-min-microvolt = <800000>; | |
| 33 | - regulator-max-microvolt = <900000>; | |
| 34 | + regulator-max-microvolt = <850000>; | |
| 35 | regulator-boot-on; | |
| 36 | regulator-always-on; | |
| 37 | regulator-ramp-delay = <3125>; | |
| 38 | + nxp,dvs-run-voltage = <850000>; | |
| 39 | + nxp,dvs-standby-voltage = <800000>; | |
| 40 | }; | |
| 41 | ||
| 42 | reg_vdd_arm: BUCK2 { | |
| 43 | @@ -111,7 +113,7 @@ | |
| 44 | reg_vdd_dram: BUCK3 { | |
| 45 | regulator-name = "buck3"; | |
| 46 | regulator-min-microvolt = <850000>; | |
| 47 | - regulator-max-microvolt = <900000>; | |
| 48 | + regulator-max-microvolt = <950000>; | |
| 49 | regulator-boot-on; | |
| 50 | regulator-always-on; | |
| 51 | }; |