drivers: pwm: sam: Update to use clock control

This update Atmel SAM pwm driver to use clock control driver.

Signed-off-by: Gerson Fernando Budke <[email protected]>

Author: nandojve

drivers/pwm/pwm_sam.c

@@ -10,6 +10,7 @@
 #include <errno.h>
 #include <zephyr/drivers/pwm.h>
 #include <zephyr/drivers/pinctrl.h>
+#include <zephyr/drivers/clock_control/atmel_sam_pmc.h>
 #include <soc.h>
 
 #include <zephyr/logging/log.h>
@@ -23,8 +24,8 @@ LOG_MODULE_REGISTER(pwm_sam, CONFIG_PWM_LOG_LEVEL);
 
 struct sam_pwm_config {
 	Pwm *regs;
+	const struct atmel_sam_pmc_config clock_cfg;
 	const struct pinctrl_dev_config *pcfg;
-	uint32_t id;
 	uint8_t prescaler;
 	uint8_t divider;
 };
@@ -96,15 +97,15 @@ static int sam_pwm_init(const struct device *dev)
 	const struct sam_pwm_config *config = dev->config;
 
 	Pwm * const pwm = config->regs;
-	uint32_t id = config->id;
 	uint8_t prescaler = config->prescaler;
 	uint8_t divider = config->divider;
 	int retval;
 
 	/* FIXME: way to validate prescaler & divider */
 
-	/* Enable the PWM peripheral */
-	soc_pmc_peripheral_enable(id);
+	/* Enable PWM clock in PMC */
+	(void)clock_control_on(SAM_DT_PMC_CONTROLLER,
+			       (clock_control_subsys_t *)&config->clock_cfg);
 
 	retval = pinctrl_apply_state(config->pcfg, PINCTRL_STATE_DEFAULT);
 	if (retval < 0) {
@@ -127,7 +128,7 @@ static const struct pwm_driver_api sam_pwm_driver_api = {
 	static const struct sam_pwm_config sam_pwm_config_##inst = {	\
 		.regs = (Pwm *)DT_INST_REG_ADDR(inst),			\
 		.pcfg = PINCTRL_DT_INST_DEV_CONFIG_GET(inst),		\
-		.id = DT_INST_PROP(inst, peripheral_id),		\
+		.clock_cfg = SAM_DT_INST_CLOCK_PMC_CFG(inst),		\
 		.prescaler = DT_INST_PROP(inst, prescaler),		\
 		.divider = DT_INST_PROP(inst, divider),			\
 	};								\

dts/arm/atmel/sam4s.dtsi

@@ -128,7 +128,7 @@
 			compatible = "atmel,sam-pwm";
 			reg = <0x40020000 0x4000>;
 			interrupts = <31 1>;
-			peripheral-id = <31>;
+			clocks = <&pmc PMC_TYPE_PERIPHERAL 31>;
 			prescaler = <10>;
 			divider = <1>;
 			#pwm-cells = <3>;

dts/arm/atmel/same70.dtsi

@@ -287,7 +287,7 @@
 			compatible = "atmel,sam-pwm";
 			reg = <0x40020000 0x4000>;
 			interrupts = <31 0>;
-			peripheral-id = <31>;
+			clocks = <&pmc PMC_TYPE_PERIPHERAL 31>;
 			status = "disabled";
 			prescaler = <10>;
 			divider = <1>;
@@ -298,7 +298,7 @@
 			compatible = "atmel,sam-pwm";
 			reg = <0x4005c000 0x4000>;
 			interrupts = <60 0>;
-			peripheral-id = <60>;
+			clocks = <&pmc PMC_TYPE_PERIPHERAL 60>;
 			status = "disabled";
 			prescaler = <10>;
 			divider = <1>;

dts/bindings/pwm/atmel,sam-pwm.yaml

@@ -17,9 +17,7 @@ properties:
   interrupts:
     required: true
 
-  peripheral-id:
-    type: int
-    description: peripheral ID
+  clocks:
     required: true
 
   prescaler: