| Message ID | 20180619224131.25497-1-aford173@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
* Adam Ford <aford173@gmail.com> [180619 15:44]: > There are several peripherals who generate some extra noise when > they don't have a regulator assigned to them. This patch > creates a dummy regulator to reduce the noise. > > Signed-off-by: Adam Ford <aford173@gmail.com> > > diff --git a/arch/arm/boot/dts/am3517-evm.dts b/arch/arm/boot/dts/am3517-evm.dts > index d7eb6ad76c29..0d56c3f56a6d 100644 > --- a/arch/arm/boot/dts/am3517-evm.dts > +++ b/arch/arm/boot/dts/am3517-evm.dts > @@ -31,6 +31,13 @@ > regulator-max-microvolt = <3300000>; > }; > > + dummy_reg: dummy_reg { > + compatible = "regulator-fixed"; > + regulator-name = "dummy_reg"; > + regulator-min-microvolt = <3300000>; > + regulator-max-microvolt = <3300000>; > + }; > + How about just rename it to something like reg_3v3 instead of dummy? Then if you find some GPIO or PMIC register controlling it you don't have to change the naming again? Regards, Tony -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/arch/arm/boot/dts/am3517-evm.dts b/arch/arm/boot/dts/am3517-evm.dts index d7eb6ad76c29..0d56c3f56a6d 100644 --- a/arch/arm/boot/dts/am3517-evm.dts +++ b/arch/arm/boot/dts/am3517-evm.dts @@ -31,6 +31,13 @@ regulator-max-microvolt = <3300000>; }; + dummy_reg: dummy_reg { + compatible = "regulator-fixed"; + regulator-name = "dummy_reg"; + regulator-min-microvolt = <3300000>; + regulator-max-microvolt = <3300000>; + }; + gpio-keys { compatible = "gpio-keys-polled"; poll-interval = <100>; @@ -127,7 +134,7 @@ status = "okay"; pinctrl-names = "default"; enable-gpios = <&gpio6 16 GPIO_ACTIVE_HIGH>; /* gpio176, lcd INI */ - + vcc-supply = <&dummy_reg>; port { lcd_in: endpoint { remote-endpoint = <&dpi_out>; @@ -154,6 +161,7 @@ bl: backlight { compatible = "pwm-backlight"; pinctrl-names = "default"; + power-supply = <&dummy_reg>; pinctrl-0 = <&backlight_pins>; pwms = <&pwm11 0 5000000 0>; brightness-levels = <0 10 20 30 40 50 60 70 80 90 100>; @@ -203,6 +211,7 @@ reg = <0x21>; gpio-controller; #gpio-cells = <2>; + vcc-supply = <&dummy_reg>; }; };
There are several peripherals who generate some extra noise when they don't have a regulator assigned to them. This patch creates a dummy regulator to reduce the noise. Signed-off-by: Adam Ford <aford173@gmail.com>