driver: intc: add MIWU driver support in NPCM series.

The device Multi-Input Wake-Up Unit (MIWU) supports the embedded
controller (EC) to exit 'Sleep' or 'Deep Sleep' power state which allows
chip has better power consumption. Also, it provides signal conditioning
such as 'Level' and 'Edge' trigger type and grouping of external
interrupt sources of NVIC. The NPCM series has three identical MIWU
modules: MIWU0, MIWU1, MIWU2. Together, they support a total of 143
internal and/or external wake-up sources.

In this CL, we use device tree files to present the relationship bewteen
MIWU and the other devices in different npcm series. For npcm4 series,
it include:
1. npcm4-miwus-int-map.dtsi: it presents relationship between MIWU group
   and NVIC interrupt in npcm4. Please notice it isn't 1-to-1 mapping.
2. npcm4-miwus-wui-map.dtsi: it presents relationship between input of
   MIWU and its source device such as gpio, timer, eSPI VWs and so on.

This CL also includes:
1. Add MIWU device tree declarations.
2. MIWU api function declarations and implementation to configure signal
   conditions and callback function mechanism. They can be be classified
   into two types. One is for GPIO which connects original gpio callback
   implemetation and the other is for generic devices such as timer,
   eSPI, and so on.
3. Update the npcm gpio driver for the interaction with npcm MIWU
   driver.

Signed-off-by: Tyrone Ting <[email protected]>

boards/nuvoton/npcm400f_evb/npcm400f_evb_defconfig

@@ -33,3 +33,6 @@ CONFIG_UART_CONSOLE=y
 # GPIO Driver
 CONFIG_GPIO=y
 CONFIG_GPIO_NPCM=y
+
+# MIWU Driver
+CONFIG_NPCM_MIWU=y

drivers/gpio/gpio_npcm.c

@@ -66,7 +66,6 @@ const struct device *npcm_get_gpio_dev(int port)
 	return gpio_devs[port];
 }
 
-#ifdef CONFIG_NPCM_MIWU
 void npcm_gpio_enable_io_pads(const struct device *dev, int pin)
 {
 	const struct gpio_npcm_config *const config = dev->config;
@@ -104,14 +103,6 @@ void npcm_gpio_disable_io_pads(const struct device *dev, int pin)
 		npcm_miwu_io_disable(io_wui);
 	}
 }
-#else
-void npcm_gpio_enable_io_pads(const struct device *dev, int pin)
-{
-}
-void npcm_gpio_disable_io_pads(const struct device *dev, int pin)
-{
-}
-#endif
 
 /* GPIO api functions */
 static int gpio_npcm_config(const struct device *dev,
@@ -277,7 +268,6 @@ static int gpio_npcm_port_toggle_bits(const struct device *dev,
 	return 0;
 }
 
-#ifdef CONFIG_NPCM_MIWU
 static int gpio_npcm_pin_interrupt_configure(const struct device *dev,
 					     gpio_pin_t pin,
 					     enum gpio_int_mode mode,
@@ -337,23 +327,12 @@ static int gpio_npcm_pin_interrupt_configure(const struct device *dev,
 
 	return 0;
 }
-#else
-static int gpio_npcm_pin_interrupt_configure(const struct device *dev,
-					     gpio_pin_t pin,
-					     enum gpio_int_mode mode,
-					     enum gpio_int_trig trig)
-{
-	return -EINVAL;
-}
-#endif
-
 
-#ifdef CONFIG_NPCM_MIWU
 static int gpio_npcm_manage_callback(const struct device *dev,
 				      struct gpio_callback *callback, bool set)
 {
 	const struct gpio_npcm_config *const config = dev->config;
-	struct miwu_io_callback *miwu_cb = (struct miwu_io_callback *)callback;
+	struct miwu_callback *miwu_cb = (struct miwu_callback *)callback;
 	int pin = find_lsb_set(callback->pin_mask) - 1;
 
 	/* pin_mask should not be zero */
@@ -373,15 +352,8 @@ static int gpio_npcm_manage_callback(const struct device *dev,
 			config->port);
 
 	/* Insert or remove a IO callback which being called in MIWU ISRs */
-	return npcm_miwu_manage_gpio_callback(miwu_cb, set);
+	return npcm_miwu_manage_callback(miwu_cb, set);
 }
-#else
-static int gpio_npcm_manage_callback(const struct device *dev,
-				      struct gpio_callback *callback, bool set)
-{
-	return -EINVAL;
-}
-#endif
 
 /* GPIO driver registration */
 static const struct gpio_driver_api gpio_npcm_driver = {

drivers/interrupt_controller/CMakeLists.txt

@@ -21,6 +21,7 @@ zephyr_library_sources_ifdef(CONFIG_LEON_IRQMP              intc_irqmp.c)
 zephyr_library_sources_ifdef(CONFIG_LOAPIC                  intc_loapic.c intc_system_apic.c)
 zephyr_library_sources_ifdef(CONFIG_LOAPIC_SPURIOUS_VECTOR  intc_loapic_spurious.S)
 zephyr_library_sources_ifdef(CONFIG_MCHP_ECIA_XEC           intc_mchp_ecia_xec.c)
+zephyr_library_sources_ifdef(CONFIG_NPCM_MIWU               intc_npcm_miwu.c)
 zephyr_library_sources_ifdef(CONFIG_NPCX_MIWU               intc_miwu.c)
 zephyr_library_sources_ifdef(CONFIG_PLIC                    intc_plic.c)
 zephyr_library_sources_ifdef(CONFIG_RV32M1_INTMUX           intc_rv32m1_intmux.c)

drivers/interrupt_controller/Kconfig

@@ -78,6 +78,8 @@ source "drivers/interrupt_controller/Kconfig.sam0"
 
 source "drivers/interrupt_controller/Kconfig.gic"
 
+source "drivers/interrupt_controller/Kconfig.npcm"
+
 source "drivers/interrupt_controller/Kconfig.npcx"
 
 source "drivers/interrupt_controller/Kconfig.intel_vtd"

drivers/interrupt_controller/Kconfig.npcm

@@ -0,0 +1,13 @@
+# NPCM GPIO driver configuration options
+
+# Copyright (c) 2024 Nuvoton Technology Corporation.
+# SPDX-License-Identifier: Apache-2.0
+
+config NPCM_MIWU
+	bool "Nuvoton NPCM embedded controller (EC) miwu driver"
+	default y
+	depends on SOC_FAMILY_NPCM
+	help
+	  This option enables the Multi-Input Wake-Up Unit (MIWU) driver
+	  for NPCM family ofprocessors.
+	  This is required for GPIO, RTC, LPC/eSPI interrupt support.