From: Nishanth Menon Date: Wed, 20 Apr 2016 08:18:39 +0000 (-0500) Subject: ARM: dts: AM57xx/DRA7: Update SoC voltage rail limits to match data sheet X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=54d03c5d8b2a8af15b25e748fa9bc6e572060125;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git ARM: dts: AM57xx/DRA7: Update SoC voltage rail limits to match data sheet As per the data sheet starting from SPRUHQ0H (Nov 2015 - Latest[1]), VDD_CORE can vary from 0.85v to 1.15v for AVS class0. VDD GPU/DSP et.al. can range from 0.85v to 1.25V with AVS class0 Since dynamic voltage scaling is disabled for DRA7/AM57xx SoCs for all SoC rails other than MPU, the bootloader is responsible for setting up the AVS class0 voltage, however, with wrong voltage machine constraints in dtb, regulator framework will lower the voltage below the required voltage levels for certain samples in production flow. This can cause catastrophic failures which can be pretty hard to identify. Update board files which don't match required specification. [1] http://www.ti.com/product/AM5728/datasheet/specifications#SPRT637-7340 Signed-off-by: Nishanth Menon Signed-off-by: Tony Lindgren --- diff --git a/arch/arm/boot/dts/am57xx-beagle-x15.dts b/arch/arm/boot/dts/am57xx-beagle-x15.dts index 75d04b1bbd1b..779466e18d34 100644 --- a/arch/arm/boot/dts/am57xx-beagle-x15.dts +++ b/arch/arm/boot/dts/am57xx-beagle-x15.dts @@ -438,7 +438,7 @@ /* VDD_DSPEVE, VDD_IVA, VDD_GPU */ regulator-name = "smps45"; regulator-min-microvolt = < 850000>; - regulator-max-microvolt = <1150000>; + regulator-max-microvolt = <1250000>; regulator-always-on; regulator-boot-on; }; @@ -447,7 +447,7 @@ /* VDD_CORE */ regulator-name = "smps6"; regulator-min-microvolt = <850000>; - regulator-max-microvolt = <1030000>; + regulator-max-microvolt = <1150000>; regulator-always-on; regulator-boot-on; }; diff --git a/arch/arm/boot/dts/dra7-evm.dts b/arch/arm/boot/dts/dra7-evm.dts index d272cf140197..e94cbb7dd3c5 100644 --- a/arch/arm/boot/dts/dra7-evm.dts +++ b/arch/arm/boot/dts/dra7-evm.dts @@ -431,7 +431,7 @@ /* VDD_DSPEVE */ regulator-name = "smps45"; regulator-min-microvolt = < 850000>; - regulator-max-microvolt = <1150000>; + regulator-max-microvolt = <1250000>; regulator-always-on; regulator-boot-on; }; @@ -449,7 +449,7 @@ /* CORE_VDD */ regulator-name = "smps7"; regulator-min-microvolt = <850000>; - regulator-max-microvolt = <1060000>; + regulator-max-microvolt = <1150000>; regulator-always-on; regulator-boot-on; }; diff --git a/arch/arm/boot/dts/dra72-evm-common.dtsi b/arch/arm/boot/dts/dra72-evm-common.dtsi index 2c880501ba2e..874bdf1db306 100644 --- a/arch/arm/boot/dts/dra72-evm-common.dtsi +++ b/arch/arm/boot/dts/dra72-evm-common.dtsi @@ -328,7 +328,7 @@ /* VDD_CORE */ regulator-name = "smps2"; regulator-min-microvolt = <850000>; - regulator-max-microvolt = <1060000>; + regulator-max-microvolt = <1150000>; regulator-boot-on; regulator-always-on; };