boards: efm32pg_stk3402a: Add minimal pwm support

With this additions samples/basic/blinky_pwm works. LED0 is used as pwm output. Signed-off-by: Christian Taedcke <[email protected]>
nimams · Jul 4, 2022 · e71c2d1 · e71c2d1
1 parent a232b1b
commit e71c2d1
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Showing 4 changed files with 28 additions and 0 deletions.
diff --git a/boards/arm/efm32pg_stk3402a/efm32pg_stk3402a_common.dtsi b/boards/arm/efm32pg_stk3402a/efm32pg_stk3402a_common.dtsi
@@ -21,6 +21,7 @@
 	aliases {
 		led0 = &led0;
 		led1 = &led1;
+		pwm-led0 = &pwm_led0;
 		sw0 = &button0;
 		sw1 = &button1;
 	};
@@ -50,6 +51,14 @@
 			label = "User Push Button 1";
 		};
 	};
+
+	pwmleds {
+		compatible = "pwm-leds";
+		status = "okay";
+		pwm_led0: pwm_led0 {
+			pwms = <&pwm0 0 PWM_MSEC(20) PWM_POLARITY_NORMAL>;
+		};
+	};
 };
 
 &cpu0 {
@@ -81,6 +90,16 @@
 	status = "okay";
 };
 
+&timer0 {
+	status = "okay";
+
+	pwm0: pwm {
+		status = "okay";
+		pin-location = <GECKO_LOCATION(28) GECKO_PORT_F GECKO_PIN(4)>;
+		prescaler = <1024>;
+	};
+};
+
 &gpio {
 	location-swo = <0>;
 	status = "okay";

diff --git a/dts/arm/silabs/efm32_jg_pg_12b.dtsi b/dts/arm/silabs/efm32_jg_pg_12b.dtsi
@@ -9,6 +9,7 @@
 #include <arm/armv7-m.dtsi>
 #include <zephyr/dt-bindings/gpio/gpio.h>
 #include <zephyr/dt-bindings/i2c/i2c.h>
+#include <zephyr/dt-bindings/pwm/pwm.h>
 #include "gpio_gecko.h"
 
 / {

diff --git a/soc/arm/silabs_exx32/efm32jg12b/Kconfig.defconfig.efm32jg12b b/soc/arm/silabs_exx32/efm32jg12b/Kconfig.defconfig.efm32jg12b
@@ -28,3 +28,7 @@ config SOC_FLASH_GECKO
 config SPI_GECKO
 	default y
 	depends on SPI
+
+config PWM_GECKO
+	default y
+	depends on PWM
diff --git a/soc/arm/silabs_exx32/efm32pg12b/Kconfig.defconfig.efm32pg12b b/soc/arm/silabs_exx32/efm32pg12b/Kconfig.defconfig.efm32pg12b
@@ -28,3 +28,7 @@ config SOC_FLASH_GECKO
 config SPI_GECKO
 	default y
 	depends on SPI
+
+config PWM_GECKO
+	default y
+	depends on PWM