lkml.org 
[lkml]   [2019]   [Feb]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v3 2/4] arm64: dts: allwinner: h6: pine: Add CPU supply regulator
Date
The original pine use the dcdca to supply the CPU cores. According
to the axp805 spec, the range of dcdca is 0.6 to 1.1v, 1.12 to 1.52v.
In order to support more CPU frequency, slightly increase the voltage
maximum and minimum.

In fact, in sunxi's sdk, the actual minimum and maximum voltage of the
cpu is smaller or larger than the datasheet.

For some better quality ic, the minimum voltage can be smaller. For
some poor quality ic, the maximum voltage needs to be increased a
little.

Signed-off-by: Yangtao Li <tiny.windzz@gmail.com>
---
arch/arm64/boot/dts/allwinner/sun50i-h6-pine-h64.dts | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h6-pine-h64.dts b/arch/arm64/boot/dts/allwinner/sun50i-h6-pine-h64.dts
index bdb8470fc8dc..95c81250c2b3 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-h6-pine-h64.dts
+++ b/arch/arm64/boot/dts/allwinner/sun50i-h6-pine-h64.dts
@@ -213,8 +213,8 @@

reg_dcdca: dcdca {
regulator-always-on;
- regulator-min-microvolt = <810000>;
- regulator-max-microvolt = <1080000>;
+ regulator-min-microvolt = <800000>;
+ regulator-max-microvolt = <1160000>;
regulator-name = "vdd-cpu";
};

@@ -251,6 +251,10 @@
};
};

+&cpu0 {
+ cpu-supply = <&reg_dcdca>;
+};
+
&uart0 {
pinctrl-names = "default";
pinctrl-0 = <&uart0_ph_pins>;
--
2.17.0
\
 
 \ /
  Last update: 2019-02-15 16:55    [W:0.039 / U:37.028 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site