From: Icenowy Zheng <icenowy@aosc.io>
To: Mark Brown <broonie@kernel.org>,
Liam Girdwood <lgirdwood@gmail.com>,
Maxime Ripard <maxime.ripard@bootlin.com>,
Chen-Yu Tsai <wens@csie.org>
Cc: linux-kernel@vger.kernel.org, devicetree@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-sunxi@googlegroups.com, Ondrej Jirman <megous@megous.com>,
Icenowy Zheng <icenowy@aosc.io>
Subject: [PATCH v4 3/3] ARM: dts: sun8i: h3: Add SY8106A regulator to Orange Pi PC
Date: Mon, 7 May 2018 20:29:42 +0800 [thread overview]
Message-ID: <20180507122942.25758-4-icenowy@aosc.io> (raw)
In-Reply-To: <20180507122942.25758-1-icenowy@aosc.io>
From: Ondrej Jirman <megous@megous.com>
Add SY8106A regulator to r_i2c bus and enable the r_i2c bus on
Orange Pi PC, then set the power supply of the ARM cores to this
regulator, in order to enable DVFS.
Signed-off-by: Ondrej Jirman <megous@megous.com>
[Icenowy: Enable DVFS in this patch, slight changes and change commit
message]
Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
Reviewed-by: Chen-Yu Tsai <wens@csie.org>
[wens@csie.org: Rename regulator label]
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
---
No changes in v4.
Changes in v3:
- Renamed regulator label (by Chen-Yu Tsai).
- Added the fixed mode voltage number.
Changes in v2:
- Reduce maximum voltage to 1.3V.
- Slightly changed the comment at 1.0V minimum voltage for taking BSP
DVFS table instead of Armbian one.
arch/arm/boot/dts/sun8i-h3-orangepi-pc.dts | 28 ++++++++++++++++++++++
1 file changed, 28 insertions(+)
diff --git a/arch/arm/boot/dts/sun8i-h3-orangepi-pc.dts b/arch/arm/boot/dts/sun8i-h3-orangepi-pc.dts
index cea4d647ecbf..46240334128f 100644
--- a/arch/arm/boot/dts/sun8i-h3-orangepi-pc.dts
+++ b/arch/arm/boot/dts/sun8i-h3-orangepi-pc.dts
@@ -113,6 +113,10 @@
status = "okay";
};
+&cpu0 {
+ cpu-supply = <®_vdd_cpux>;
+};
+
&ehci0 {
status = "okay";
};
@@ -182,6 +186,30 @@
};
};
+&r_i2c {
+ status = "okay";
+
+ reg_vdd_cpux: regulator@65 {
+ compatible = "silergy,sy8106a";
+ reg = <0x65>;
+ regulator-name = "vdd-cpux";
+ silergy,fixed-microvolt = <1200000>;
+ /*
+ * The datasheet uses 1.1V as the minimum value of VDD-CPUX,
+ * however both the Armbian DVFS table and the official one
+ * have operating points with voltage under 1.1V, and both
+ * DVFS table are known to work properly at the lowest
+ * operating point.
+ *
+ * Use 1.0V as the minimum voltage instead.
+ */
+ regulator-min-microvolt = <1000000>;
+ regulator-max-microvolt = <1300000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+};
+
&r_pio {
leds_r_opc: led_pins {
pins = "PL10";
--
2.17.0
next prev parent reply other threads:[~2018-05-07 12:33 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-07 12:29 [PATCH v4 0/3] SY8106A regulator support and enable it on Orange Pi PC Icenowy Zheng
2018-05-07 12:29 ` [PATCH v4 1/3] dt-bindings: add binding for the SY8106A voltage regulator Icenowy Zheng
2018-05-07 12:29 ` [PATCH v4 2/3] regulator: add support for SY8106A regulator Icenowy Zheng
2018-05-09 9:32 ` Applied "regulator: add support for SY8106A regulator" to the regulator tree Mark Brown
2018-05-09 9:48 ` Mark Brown
2018-05-07 12:29 ` Icenowy Zheng [this message]
2018-05-11 8:01 ` [PATCH v4 3/3] ARM: dts: sun8i: h3: Add SY8106A regulator to Orange Pi PC Maxime Ripard
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