From: Philippe Schenker philippe.schenker@toradex.com
[ Upstream commit b5a76cb38df779076a3cff624ce6a368d9bcf330 ]
Currently, we limited the voltages from the PMIC very strictly. This causes an issue with one Toradex SKU that uses a consumer-grade chip that is capable of going up to 1.8GHz at 1.00V.
Extend the ranges to min/max values of the SoC operating ranges (table 10) in the datasheet. Detailed explanation as follows:
BUCK2: - As already described above, the SKU with the consumer-grade chip needs a voltage of at least 1.00V. 1.05V is chosen now as this is listed as the maximum. Both industrial and consumer-grade chips have an absolute maximum rating of 1.15V which makes it still safe to put 1.05V - Lower the regulator-min value to the smallest value allowed from the Quad-A53, 1.2GHz version of the SoC
BUCK3: - This regulator is used for SoC input voltages VDD_GPU, VDD_VPU and VDD_DRAM. - Use the smallest value of these three inputs as the regulator-min - Use the largest value of these three inputs as the regulator-max
LDO2: - This LDO is used for VDD_SNVS_0P8 SoC input voltage. As this has a single nominal input voltage just put this in the middle of 0.8V.
Fixes: 6a57f224f734 ("arm64: dts: freescale: add initial support for verdin imx8m mini") Signed-off-by: Philippe Schenker philippe.schenker@toradex.com Signed-off-by: Marcel Ziswiler marcel.ziswiler@toradex.com Signed-off-by: Shawn Guo shawnguo@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- arch/arm64/boot/dts/freescale/imx8mm-verdin.dtsi | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/arch/arm64/boot/dts/freescale/imx8mm-verdin.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-verdin.dtsi index c2d4da25482f..44b473494d0f 100644 --- a/arch/arm64/boot/dts/freescale/imx8mm-verdin.dtsi +++ b/arch/arm64/boot/dts/freescale/imx8mm-verdin.dtsi @@ -359,8 +359,8 @@ reg_vdd_arm: BUCK2 { nxp,dvs-standby-voltage = <850000>; regulator-always-on; regulator-boot-on; - regulator-max-microvolt = <950000>; - regulator-min-microvolt = <850000>; + regulator-max-microvolt = <1050000>; + regulator-min-microvolt = <805000>; regulator-name = "On-module +VDD_ARM (BUCK2)"; regulator-ramp-delay = <3125>; }; @@ -368,8 +368,8 @@ reg_vdd_arm: BUCK2 { reg_vdd_dram: BUCK3 { regulator-always-on; regulator-boot-on; - regulator-max-microvolt = <950000>; - regulator-min-microvolt = <850000>; + regulator-max-microvolt = <1000000>; + regulator-min-microvolt = <805000>; regulator-name = "On-module +VDD_GPU_VPU_DDR (BUCK3)"; };
@@ -408,7 +408,7 @@ reg_nvcc_snvs: LDO1 { reg_vdd_snvs: LDO2 { regulator-always-on; regulator-boot-on; - regulator-max-microvolt = <900000>; + regulator-max-microvolt = <800000>; regulator-min-microvolt = <800000>; regulator-name = "On-module +V0.8_SNVS (LDO2)"; };