| From adb1f13ec2a3d9ec2f216f60d03aa074ac22fe70 Mon Sep 17 00:00:00 2001 |
| From: Soeren Moch <smoch@web.de> |
| Date: Thu, 3 Oct 2019 23:50:34 +0200 |
| Subject: [PATCH] arm64: dts: rockchip: fix RockPro64 vdd-log regulator |
| settings |
| |
| commit 0990c5e7573098117c69651821647c228483e31b upstream. |
| |
| The RockPro64 schematic [1] page 18 states a min voltage of 0.8V and a |
| max voltage of 1.4V for the VDD_LOG pwm regulator. However, there is an |
| additional note that the pwm parameter needs to be modified. |
| From the schematics a voltage range of 0.8V to 1.7V can be calculated. |
| Additional voltage measurements on the board show that this fix indeed |
| leads to the correct voltage, while without this fix the voltage was set |
| too high. |
| |
| [1] http://files.pine64.org/doc/rockpro64/rockpro64_v21-SCH.pdf |
| |
| Fixes: e4f3fb490967 ("arm64: dts: rockchip: add initial dts support for Rockpro64") |
| Signed-off-by: Soeren Moch <smoch@web.de> |
| Link: https://lore.kernel.org/r/20191003215036.15023-1-smoch@web.de |
| Signed-off-by: Heiko Stuebner <heiko@sntech.de> |
| Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> |
| |
| diff --git a/arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dts b/arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dts |
| index e525b5b99b15..65f55f95039d 100644 |
| --- a/arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dts |
| +++ b/arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dts |
| @@ -166,7 +166,7 @@ |
| regulator-always-on; |
| regulator-boot-on; |
| regulator-min-microvolt = <800000>; |
| - regulator-max-microvolt = <1400000>; |
| + regulator-max-microvolt = <1700000>; |
| vin-supply = <&vcc5v0_sys>; |
| }; |
| }; |
| -- |
| 2.7.4 |
| |
