drivers: clock_control: convert lpc11u6x syscon driver to pinctrl

convert lpc11u6x syscon clock driver to pin control, and remove all
pinmux usage from driver and syscon dts node.

Signed-off-by: Daniel DeGrasse <daniel.degrasse@nxp.com>

drivers/clock_control/clock_control_lpc11u6x.c

@@ -10,7 +10,6 @@
 #include <zephyr/device.h>
 
 #include <zephyr/drivers/clock_control/lpc11u6x_clock_control.h>
-#include <zephyr/drivers/pinmux.h>
 
 #include "clock_control_lpc11u6x.h"
 
@@ -74,43 +73,6 @@ static void syscon_ahb_clock_enable(struct lpc11u6x_syscon_regs *syscon,
 	}
 }
 
-#if defined(CONFIG_CLOCK_CONTROL_LPC11U6X_PLL_SRC_SYSOSC) \
-	&& DT_INST_NODE_HAS_PROP(0, pinmuxs)
-/**
- * @brief: configure system oscillator pins.
- *
- * This system oscillator pins and their configurations are retrieved from the
- * "pinmuxs" property of the DT clock controller node.
- */
-static void pinmux_enable_sysosc(void)
-{
-	const struct device *pinmux_dev;
-	uint32_t pin, func;
-
-	pinmux_dev = device_get_binding(
-		DT_LABEL(DT_INST_PHANDLE_BY_NAME(0, pinmuxs, xtalin)));
-	if (!pinmux_dev) {
-		return;
-	}
-	pin = DT_INST_PHA_BY_NAME(0, pinmuxs, xtalin, pin);
-	func = DT_INST_PHA_BY_NAME(0, pinmuxs, xtalin, function);
-
-	pinmux_pin_set(pinmux_dev, pin, func);
-
-	pinmux_dev = device_get_binding(
-		DT_LABEL(DT_INST_PHANDLE_BY_NAME(0, pinmuxs, xtalout)));
-	if (!pinmux_dev) {
-		return;
-	}
-	pin = DT_INST_PHA_BY_NAME(0, pinmuxs, xtalout, pin);
-	func = DT_INST_PHA_BY_NAME(0, pinmuxs, xtalout, function);
-
-	pinmux_pin_set(pinmux_dev, pin, func);
-}
-#else
-#define pinmux_enable_sysosc() do { } while (0)
-#endif
-
 static void syscon_peripheral_reset(struct lpc11u6x_syscon_regs *syscon,
 				    uint32_t mask, bool reset)
 {
@@ -347,7 +309,7 @@ static int lpc11u6x_syscon_init(const struct device *dev)
 	/* Configure PLL input */
 	syscon_set_pll_src(cfg->syscon, LPC11U6X_SYS_PLL_CLK_SEL_SYSOSC);
 
-	pinmux_enable_sysosc();
+	pinctrl_apply_state(cfg->pincfg, PINCTRL_STATE_DEFAULT);
 
 #elif defined(CONFIG_CLOCK_CONTROL_LPC11U6X_PLL_SRC_IRC)
 	syscon_power_up(cfg->syscon, LPC11U6X_PDRUNCFG_IRC_PD, true);
@@ -381,8 +343,12 @@ static const struct clock_control_driver_api lpc11u6x_clock_control_api = {
 	.get_rate = lpc11u6x_clock_control_get_rate,
 };
 
+
+PINCTRL_DT_INST_DEFINE(0);
+
 static const struct lpc11u6x_syscon_config syscon_config = {
 	.syscon = (struct lpc11u6x_syscon_regs *) DT_INST_REG_ADDR(0),
+	.pincfg = PINCTRL_DT_INST_DEV_CONFIG_GET(0),
 };
 
 static struct lpc11u6x_syscon_data syscon_data;

drivers/clock_control/clock_control_lpc11u6x.h

@@ -7,6 +7,8 @@
 #ifndef ZEPHYR_DRIVERS_CLOCK_CONTROL_CLOCK_CONTROL_LPC11U6X_H_
 #define ZEPHYR_DRIVERS_CLOCK_CONTROL_CLOCK_CONTROL_LPC11U6X_H_
 
+#include <zephyr/drivers/pinctrl.h>
+
 #define LPC11U6X_SYS_AHB_CLK_CTRL_I2C0      (1 << 5)
 #define LPC11U6X_SYS_AHB_CLK_CTRL_GPIO      (1 << 6)
 #define LPC11U6X_SYS_AHB_CLK_CTRL_USART0    (1 << 12)
@@ -132,6 +134,7 @@ struct lpc11u6x_syscon_regs {
 
 struct lpc11u6x_syscon_config {
 	struct lpc11u6x_syscon_regs *syscon;
+	const struct pinctrl_dev_config *pincfg;
 };
 
 struct lpc11u6x_syscon_data {

dts/arm/nxp/nxp_lpc11u6x.dtsi

@@ -60,7 +60,7 @@
 			#size-cells = <1>;
 			ranges = <0x0 0x40044000 0x150>;
 			pinctrl: pinctrl {
-				compatible = "nxp,lpc-iocon-pinctrl";
+				compatible = "nxp,lpc11u6x-pinctrl";
 			};
 			/* PIO0_0 to PIO0_23 */
 			pio0: pio0@0 {
@@ -164,8 +164,6 @@
 			#clock-cells = <1>;
 			reg = <0x40048000 0x400>;
 			label = "SYSCON";
-			pinmuxs = <&pinmux2 0 1>, <&pinmux2 1 1>;
-			pinmux-names = "XTALIN", "XTALOUT";
 		};
 
 		uart0: serial@40008000 {

dts/bindings/clock/nxp,lpc11u6x-syscon.yaml

@@ -5,7 +5,7 @@ description: LPC11U6X clock controller node
 
 compatible: "nxp,lpc11u6x-syscon"
 
-include: [clock-controller.yaml, base.yaml]
+include: [clock-controller.yaml, pinctrl-device.yaml, base.yaml]
 
 properties:
     reg:
@@ -14,15 +14,11 @@ properties:
     label:
       required: true
 
-    pinmuxs:
+    pinctrl-0:
-      type: phandle-array
       required: true
-      description: system oscillator pinmux configuration
 
-    pinmux-names:
+    pinctrl-names:
-      type: string-array
+      required: true
-      required: false
-      description: system oscillator pins names
 
     "#clock-cells":
       const: 1