Re: [linux-sunxi] [PATCH 09/10] ARM: sun8i: h2+: add SY8113B regulator used by Orange Pi Zero board
From: Chen-Yu Tsai <hidden>
Date: 2017-07-24 04:09:45
Also in:
linux-arm-kernel, linux-clk, linux-pm, lkml
On Sun, Jul 23, 2017 at 6:27 PM, Icenowy Zheng [off-list ref] wrote:
quoted hunk ↗ jump to hunk
Orange Pi Zero board has a SY8113B regulator, which is controlled via GPIO and capable of outputing 1.1V when the PL6 GPIO is set to output 0 or 1.3V when the PL6 GPIO is set to input or output 1, and the output is the power supply of the ARM cores in H2+ SoC. Add the device tree node of this regulator and set the cpu's cpu-supply property to it. Signed-off-by: Icenowy Zheng <redacted> --- arch/arm/boot/dts/sun8i-h2-plus-orangepi-zero.dts | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+)diff --git a/arch/arm/boot/dts/sun8i-h2-plus-orangepi-zero.dts b/arch/arm/boot/dts/sun8i-h2-plus-orangepi-zero.dts index 6713d0f2b3f4..28b4433bd7f7 100644 --- a/arch/arm/boot/dts/sun8i-h2-plus-orangepi-zero.dts +++ b/arch/arm/boot/dts/sun8i-h2-plus-orangepi-zero.dts@@ -94,6 +94,27 @@ reset-gpios = <&r_pio 0 7 GPIO_ACTIVE_LOW>; post-power-on-delay-ms = <200>; }; + + reg_sy8113b: gpio-regulator { + compatible = "regulator-gpio"; +
No need for the newline.
+ regulator-name = "vdd-cpux"; + regulator-type = "voltage"; + regulator-boot-on; + regulator-always-on; + regulator-min-microvolt = <1100000>; + regulator-max-microvolt = <1300000>; + regulator-ramp-delay = <50>; /* 4ms */
You should also add "enable-active-high". The driver might not honor the GPIO_ACTIVE_HIGH flag. AFAIK this was a problem with the old GPIO API. ChenYu
+
+ gpios = <&r_pio 0 6 GPIO_ACTIVE_HIGH>; /* PL6 */
+ gpios-states = <0x1>;
+ states = <1100000 0x0
+ 1300000 0x1>;
+ };
+};
+
+&cpu0 {
+ cpu-supply = <®_sy8113b>;
};
&ehci0 {
--
2.13.0
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