boards: nxp: mimxrt700_evk: enable sc_timer as pwm function

enable sc_timer for cm33_cpu0 core.
test tests/drivers/pwm/pwm_api case passed.

Signed-off-by: Lucien Zhao <[email protected]>

Author: lucien-nxp

boards/nxp/mimxrt700_evk/board.c

@@ -432,6 +432,10 @@ void board_early_init_hook(void)
 #if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(wwdt0))
 	CLOCK_AttachClk(kLPOSC_to_WWDT0);
 #endif
+
+#if DT_NODE_HAS_STATUS(DT_NODELABEL(sc_timer), okay)
+	CLOCK_AttachClk(kFRO0_DIV6_to_SCT);
+#endif
 }
 
 static void GlikeyWriteEnable(GLIKEY_Type *base, uint8_t idx)

boards/nxp/mimxrt700_evk/doc/index.rst

@@ -71,6 +71,8 @@ the hardware features below.
 +-----------+------------+-------------------------------------+
 | SYSTICK   | on-chip    | systick                             |
 +-----------+------------+-------------------------------------+
+| SCTimer   | on-chip    | pwm                                 |
++-----------+------------+-------------------------------------+
 | IOCON     | on-chip    | pinmux                              |
 +-----------+------------+-------------------------------------+
 | I2C       | on-chip    | i2c                                 |

boards/nxp/mimxrt700_evk/mimxrt700_evk-pinctrl.dtsi

@@ -75,4 +75,13 @@
 			nxp,analog-mode;
 		};
 	};
+
+	pinmux_sctimer: pinmux_sctimer {
+		group0 {
+			pinmux = <SCT0_IN0_PIO0_0>;
+			slew-rate = "normal";
+			drive-strength = "normal";
+			input-enable;
+		};
+	};
 };

boards/nxp/mimxrt700_evk/mimxrt700_evk_mimxrt798s_cm33_cpu0.dts

@@ -21,6 +21,7 @@
 		sw0 = &user_button_1;
 		sw1 = &user_button_2;
 		watchdog0 = &wwdt0;
+		pwm-0 = &sc_timer;
 	};
 
 	chosen {
@@ -132,6 +133,12 @@
 	status = "okay";
 };
 
+&sc_timer {
+	status = "okay";
+	pinctrl-0 = <&pinmux_sctimer>;
+	pinctrl-names = "default";
+};
+
 &xspi0 {
 	status = "okay";