From: Yangtao Li <tiny.windzz@gmail.com>
To: maxime.ripard@bootlin.com, wens@csie.org, robh+dt@kernel.org,
mark.rutland@arm.com
Cc: linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org, Yangtao Li <tiny.windzz@gmail.com>
Subject: [PATCH v3 2/4] arm64: dts: allwinner: h6: pine: Add CPU supply regulator
Date: Fri, 15 Feb 2019 10:53:36 -0500 [thread overview]
Message-ID: <20190215155338.10564-3-tiny.windzz@gmail.com> (raw)
In-Reply-To: <20190215155338.10564-1-tiny.windzz@gmail.com>
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 = <®_dcdca>;
+};
+
&uart0 {
pinctrl-names = "default";
pinctrl-0 = <&uart0_ph_pins>;
--
2.17.0
next prev parent reply other threads:[~2019-02-15 15:54 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-15 15:53 [PATCH v3 0/4] arm64: dts: allwinner: h6: Enable CPU DVFS(cpufreq) Yangtao Li
2019-02-15 15:53 ` [PATCH v3 1/4] arm64: dts: allwinner: h6: orangepi: Add CPU supply regulator Yangtao Li
2019-02-15 15:53 ` Yangtao Li [this message]
2019-02-15 15:53 ` [PATCH v3 3/4] arm64: dts: allwinner: h6: Add clock to CPU cores Yangtao Li
2019-02-15 15:53 ` [PATCH v3 4/4] arm64: dts: allwinner: h6: Add CPU Operating Performance Points table Yangtao Li
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