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arm: brain: add support piezo buzzer

This commit is contained in:
Suguru Saito 2021-08-15 18:54:59 +09:00 committed by Takumi Sueda
parent 538fe4d9f5
commit 91059a9eae
1 changed files with 19 additions and 2 deletions
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21
arch/arm/boot/dts/imx28-brain-2g.dtsi
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@ -135,11 +135,13 @@
fsl,pull-up = <MXS_PULL_DISABLE>;
};
lcd_backlight: pwm@0 {
pwm_pins: pwm@0 {
reg = <0>;
fsl,pinmux-ids = <
MX28_PAD_AUART1_RX__PWM_0
MX28_PAD_AUART1_TX__PWM_1
MX28_PAD_PWM4__PWM_4
MX28_PAD_SAIF1_SDATA0__GPIO_3_26
>;
fsl,drive-strength = <MXS_DRIVE_4mA>;
fsl,voltage = <MXS_VOLTAGE_HIGH>;
@ -244,7 +246,7 @@
pwm: pwm@80064000 {
pinctrl-names = "default";
pinctrl-0 = <&lcd_backlight>;
pinctrl-0 = <&pwm_pins>;
status = "okay";
};
@ -288,4 +290,19 @@
brightness-levels = <0 4 8 16 32 64 128 255>;
default-brightness-level = <4>; //Set 4 for identification on probing
};
buzzer_cold: buzzer_cold {
compatible = "regulator-fixed";
regulator-name = "fixed-supply";
regulator-max-microvolt = <3300000>;
regulator-min-microvolt = <3300000>;
gpios = <&gpio3 26 GPIO_ACTIVE_LOW>;
regulator-always-on;
};
buzzer: buzzer {
compatible = "pwm-beeper";
pwms = <&pwm 4 50000>;
amp-supply = <&buzzer_cold>;
};
};