Banana Pi M2 Zero board has a SY8113B regulator, which is controlled via
GPIO and capable of outputing 1.1V when the PL1 GPIO is set to output 0
or 1.1V when the PL6 GPIO is set to input or output 1, and the output is
the power supply of the ARM cores in H3 SoC.
Add the device tree node of this regulator and set the cpu's cpu-supply
property to it.
Signed-off-by: Icenowy Zheng <[email protected]>
---
.../dts/sun8i-h2-plus-bananapi-m2-zero.dts | 21 +++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/arch/arm/boot/dts/sun8i-h2-plus-bananapi-m2-zero.dts b/arch/arm/boot/dts/sun8i-h2-plus-bananapi-m2-zero.dts
index eb61dcf32797..abc8dc750f4b 100644
--- a/arch/arm/boot/dts/sun8i-h2-plus-bananapi-m2-zero.dts
+++ b/arch/arm/boot/dts/sun8i-h2-plus-bananapi-m2-zero.dts
@@ -59,6 +59,23 @@
};
};
+ reg_vdd_cpux: vdd-cpux-regulator {
+ compatible = "regulator-gpio";
+ 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 */
+
+ gpios = <&r_pio 0 1 GPIO_ACTIVE_HIGH>; /* PL1 */
+ enable-active-high;
+ gpios-states = <0x1>;
+ states = <1100000 0x0
+ 1300000 0x1>;
+ };
+
wifi_pwrseq: wifi_pwrseq {
compatible = "mmc-pwrseq-simple";
pinctrl-names = "default";
@@ -66,6 +83,10 @@
};
};
+&cpu0 {
+ cpu-supply = <®_vdd_cpux>;
+};
+
&de {
status = "okay";
};
--
2.17.1
Hi,
On Wed, Jul 11, 2018 at 9:44 PM, Icenowy Zheng <[email protected]> wrote:
> Banana Pi M2 Zero board has a SY8113B regulator, which is controlled via
> GPIO and capable of outputing 1.1V when the PL1 GPIO is set to output 0
> or 1.1V when the PL6 GPIO is set to input or output 1, and the output is
> the power supply of the ARM cores in H3 SoC.
>
> Add the device tree node of this regulator and set the cpu's cpu-supply
> property to it.
>
> Signed-off-by: Icenowy Zheng <[email protected]>
> ---
> .../dts/sun8i-h2-plus-bananapi-m2-zero.dts | 21 +++++++++++++++++++
> 1 file changed, 21 insertions(+)
>
> diff --git a/arch/arm/boot/dts/sun8i-h2-plus-bananapi-m2-zero.dts b/arch/arm/boot/dts/sun8i-h2-plus-bananapi-m2-zero.dts
> index eb61dcf32797..abc8dc750f4b 100644
> --- a/arch/arm/boot/dts/sun8i-h2-plus-bananapi-m2-zero.dts
> +++ b/arch/arm/boot/dts/sun8i-h2-plus-bananapi-m2-zero.dts
> @@ -59,6 +59,23 @@
> };
> };
>
> + reg_vdd_cpux: vdd-cpux-regulator {
> + compatible = "regulator-gpio";
> + 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 */
> +
> + gpios = <&r_pio 0 1 GPIO_ACTIVE_HIGH>; /* PL1 */
> + enable-active-high;
> + gpios-states = <0x1>;
> + states = <1100000 0x0
So looking at the schematics with the resistor values, this calculates
to roughly 1.108475 (0.6 * (1 + 10 / 11.8)) ...
> + 1300000 0x1>;
and this to 1.308475.
ChenYu
> + };
> +
> wifi_pwrseq: wifi_pwrseq {
> compatible = "mmc-pwrseq-simple";
> pinctrl-names = "default";
> @@ -66,6 +83,10 @@
> };
> };
>
> +&cpu0 {
> + cpu-supply = <®_vdd_cpux>;
> +};
> +
> &de {
> status = "okay";
> };
> --
> 2.17.1
>
> --
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于 2018年7月11日 GMT+08:00 下午10:15:41, Chen-Yu Tsai <[email protected]> 写到:
>Hi,
>
>On Wed, Jul 11, 2018 at 9:44 PM, Icenowy Zheng <[email protected]> wrote:
>> Banana Pi M2 Zero board has a SY8113B regulator, which is controlled
>via
>> GPIO and capable of outputing 1.1V when the PL1 GPIO is set to output
>0
>> or 1.1V when the PL6 GPIO is set to input or output 1, and the output
>is
>> the power supply of the ARM cores in H3 SoC.
>>
>> Add the device tree node of this regulator and set the cpu's
>cpu-supply
>> property to it.
>>
>> Signed-off-by: Icenowy Zheng <[email protected]>
>> ---
>> .../dts/sun8i-h2-plus-bananapi-m2-zero.dts | 21
>+++++++++++++++++++
>> 1 file changed, 21 insertions(+)
>>
>> diff --git a/arch/arm/boot/dts/sun8i-h2-plus-bananapi-m2-zero.dts
>b/arch/arm/boot/dts/sun8i-h2-plus-bananapi-m2-zero.dts
>> index eb61dcf32797..abc8dc750f4b 100644
>> --- a/arch/arm/boot/dts/sun8i-h2-plus-bananapi-m2-zero.dts
>> +++ b/arch/arm/boot/dts/sun8i-h2-plus-bananapi-m2-zero.dts
>> @@ -59,6 +59,23 @@
>> };
>> };
>>
>> + reg_vdd_cpux: vdd-cpux-regulator {
>> + compatible = "regulator-gpio";
>> + 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 */
>> +
>> + gpios = <&r_pio 0 1 GPIO_ACTIVE_HIGH>; /* PL1 */
>> + enable-active-high;
>> + gpios-states = <0x1>;
>> + states = <1100000 0x0
>
>So looking at the schematics with the resistor values, this calculates
>to roughly 1.108475 (0.6 * (1 + 10 / 11.8)) ...
>
>> + 1300000 0x1>;
>
>and this to 1.308475.
But I think it cannot reach such accuracy, because of the
error of component values and the error of the power voltage.
In addition, set it to a too accurate value may break the
common opp table.
>
>ChenYu
>
>> + };
>> +
>> wifi_pwrseq: wifi_pwrseq {
>> compatible = "mmc-pwrseq-simple";
>> pinctrl-names = "default";
>> @@ -66,6 +83,10 @@
>> };
>> };
>>
>> +&cpu0 {
>> + cpu-supply = <®_vdd_cpux>;
>> +};
>> +
>> &de {
>> status = "okay";
>> };
>> --
>> 2.17.1
>>
>> --
>> You received this message because you are subscribed to the Google
>Groups "linux-sunxi" group.
>> To unsubscribe from this group and stop receiving emails from it,
>send an email to [email protected].
>> For more options, visit https://groups.google.com/d/optout.
On Wed, Jul 11, 2018 at 09:44:50PM +0800, Icenowy Zheng wrote:
> Banana Pi M2 Zero board has a SY8113B regulator, which is controlled via
> GPIO and capable of outputing 1.1V when the PL1 GPIO is set to output 0
> or 1.1V when the PL6 GPIO is set to input or output 1, and the output is
> the power supply of the ARM cores in H3 SoC.
>
> Add the device tree node of this regulator and set the cpu's cpu-supply
> property to it.
>
> Signed-off-by: Icenowy Zheng <[email protected]>
Applied, thanks!
Maxime
--
Maxime Ripard, Bootlin (formerly Free Electrons)
Embedded Linux and Kernel engineering
https://bootlin.com