soc: kinetis: add support for TPM PWM module

Some Kinetis SoCs have an instance of the the TPM module
that can be used for PWM control. As such, add the necessary
configurations to enable it on the SoCs that support it, as well as
enable the clock for the module to function.

In this case, the enablement is done only for the KW41Z SoCs,
but there are other SoCs that support it, f.i. KW38Z

Signed-off-by: Alex Porosanu <alexandru.porosanu@nxp.com>

modules/Kconfig.mcux

@@ -182,4 +182,10 @@ config HAS_MCUX_DAC32
 	bool
 	help
 	  Set if the Digital-to-Analog (DAC32) module is present in the SoC.
+
+config HAS_MCUX_TPM
+	bool
+	help
+	  Set if the Timer/PWM Module is present in the SoC
+
 endif # HAS_MCUX

soc/arm/nxp_kinetis/kwx/Kconfig.defconfig.mkw41z4

@@ -51,6 +51,10 @@ config SOC_FLASH_MCUX
 	default y
 	depends on FLASH
 
+config PWM_MCUX_TPM
+	default y
+	depends on PWM
+
 if NETWORKING
 
 config NET_L2_IEEE802154

soc/arm/nxp_kinetis/kwx/Kconfig.soc

@@ -53,6 +53,7 @@ config SOC_MKW41Z4
 	select HAS_MCUX_LPUART
 	select HAS_MCUX_RTC
 	select HAS_MCUX_SIM
+	select HAS_MCUX_TPM
 	select HAS_MCUX_TRNG
 	select HAS_OSC
 	select HAS_MCG

soc/arm/nxp_kinetis/kwx/soc_kw4xz.c

@@ -18,6 +18,7 @@
 #define ER32KSEL_LPO1KHZ	(3)
 
 #define LPUART0SRC_OSCERCLK	(1)
+#define TPMSRC_MCGPLLCLK	(1)
 
 #define CLKDIV1_DIVBY2		(1)
 
@@ -69,6 +70,13 @@ static ALWAYS_INLINE void clock_init(void)
 #if DT_HAS_NODE_STATUS_OKAY(DT_NODELABEL(lpuart0))
 	CLOCK_SetLpuartClock(LPUART0SRC_OSCERCLK);
 #endif
+
+#if defined(CONFIG_PWM) && \
+	(DT_HAS_NODE(DT_NODELABEL(pwm0)) || \
+	 DT_HAS_NODE(DT_NODELABEL(pwm1)) || \
+	 DT_HAS_NODE(DT_NODELABEL(pwm2)))
+	CLOCK_SetTpmClock(TPMSRC_MCGPLLCLK);
+#endif
 }
 
 static int kwx_init(struct device *arg)