Core and CPU voltage settings were a bit on the safe side. The actually used chips on the Colibri allow for lower voltages and work just fine this way.
SM2 is not a the parent of LDO regs, but actually the DDR regulator. The Colibri uses a different version of the TPS with other voltage mapping tables for SM2, currently we cheat by setting a fake 3,2V which results in 1,8V physical. Signed-off-by: Lucas Stach <[email protected]> --- The issue with the used version of the PMIC having a different voltage mapping for SM2 should be resolved properly. As this needs some bigger adjustments at the regulator driver this quick fix is just aimed at stopping slight overvolting of the ram with 3.11 kernels. A proper fix should land in time for 3.12. --- arch/arm/boot/dts/tegra20-colibri-512.dtsi | 33 ++++++++++++++++-------------- 1 file changed, 18 insertions(+), 15 deletions(-) diff --git a/arch/arm/boot/dts/tegra20-colibri-512.dtsi b/arch/arm/boot/dts/tegra20-colibri-512.dtsi index 92551ba..9b56dcb 100644 --- a/arch/arm/boot/dts/tegra20-colibri-512.dtsi +++ b/arch/arm/boot/dts/tegra20-colibri-512.dtsi @@ -226,14 +226,14 @@ gpio-controller; sys-supply = <&vdd_5v0_reg>; - vin-sm0-supply = <&sys_reg>; - vin-sm1-supply = <&sys_reg>; - vin-sm2-supply = <&sys_reg>; - vinldo01-supply = <&sm2_reg>; - vinldo23-supply = <&sm2_reg>; - vinldo4-supply = <&sm2_reg>; - vinldo678-supply = <&sm2_reg>; - vinldo9-supply = <&sm2_reg>; + vin-sm0-supply = <&vdd_5v0_reg>; + vin-sm1-supply = <&vdd_5v0_reg>; + vin-sm2-supply = <&vdd_5v0_reg>; + vinldo01-supply = <&vdd_5v0_reg>; + vinldo23-supply = <&vdd_5v0_reg>; + vinldo4-supply = <&vdd_5v0_reg>; + vinldo678-supply = <&vdd_5v0_reg>; + vinldo9-supply = <&vdd_5v0_reg>; regulators { #address-cells = <1>; @@ -250,8 +250,8 @@ reg = <1>; regulator-compatible = "sm0"; regulator-name = "vdd_sm0,vdd_core"; - regulator-min-microvolt = <1275000>; - regulator-max-microvolt = <1275000>; + regulator-min-microvolt = <1225000>; + regulator-max-microvolt = <1225000>; regulator-always-on; }; @@ -259,17 +259,20 @@ reg = <2>; regulator-compatible = "sm1"; regulator-name = "vdd_sm1,vdd_cpu"; - regulator-min-microvolt = <1100000>; - regulator-max-microvolt = <1100000>; + regulator-min-microvolt = <1025000>; + regulator-max-microvolt = <1025000>; regulator-always-on; }; sm2_reg: regulator@3 { reg = <3>; regulator-compatible = "sm2"; - regulator-name = "vdd_sm2,vin_ldo*"; - regulator-min-microvolt = <3700000>; - regulator-max-microvolt = <3700000>; + regulator-name = "vdd_sm2,vdd_ddr"; + /* The voltage is lying, but results + in the desired 1,8V on the TPS version + used on the Colibri */ + regulator-min-microvolt = <3200000>; + regulator-max-microvolt = <3200000>; regulator-always-on; }; -- 1.8.3.1 -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
