drivers: add eGPIO SHIM

Cherry-picked from magp-nordic/pull/2 with my local changes.

Signed-off-by: Magdalena Pastula <magdalena.pastula@nordicsemi.no>
Signed-off-by: Jakub Zymelka <jakub.zymelka@nordicsemi.com>

drivers/gpio/CMakeLists.txt

@@ -57,6 +57,7 @@ zephyr_library_sources_ifdef(CONFIG_GPIO_NEORV32    gpio_neorv32.c)
 zephyr_library_sources_ifdef(CONFIG_GPIO_NPCX       gpio_npcx.c)
 zephyr_library_sources_ifdef(CONFIG_GPIO_NPM1300    gpio_npm1300.c)
 zephyr_library_sources_ifdef(CONFIG_GPIO_NPM6001    gpio_npm6001.c)
+zephyr_library_sources_ifdef(CONFIG_GPIO_NRFE       gpio_nrfe.c)
 zephyr_library_sources_ifdef(CONFIG_GPIO_NRFX       gpio_nrfx.c)
 zephyr_library_sources_ifdef(CONFIG_GPIO_NUMAKER    gpio_numaker.c)
 zephyr_library_sources_ifdef(CONFIG_GPIO_NUMICRO    gpio_numicro.c)

drivers/gpio/Kconfig

@@ -144,6 +144,7 @@ source "drivers/gpio/Kconfig.neorv32"
 source "drivers/gpio/Kconfig.npcx"
 source "drivers/gpio/Kconfig.npm1300"
 source "drivers/gpio/Kconfig.npm6001"
+source "drivers/gpio/Kconfig.nrfe"
 source "drivers/gpio/Kconfig.nrfx"
 source "drivers/gpio/Kconfig.numaker"
 source "drivers/gpio/Kconfig.numicro"

drivers/gpio/Kconfig.nrfe

@@ -0,0 +1,10 @@
+# Copyright (c) 2024 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+
+config GPIO_NRFE
+	bool "nRF eGPIO driver"
+	default y
+	depends on DT_HAS_NORDIC_NRF_EGPIO_ENABLED
+	select NRFE_GPIO2 if HAS_HW_NRF_EGPIO2
+	help
+	  Enable eGPIO driver for nRF line of MCUs.

drivers/gpio/gpio_nrfe.c

@@ -0,0 +1,204 @@
+/*
+ * Copyright (c) 2024, Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#define DT_DRV_COMPAT nordic_nrf_egpio
+
+#include <zephyr/drivers/gpio.h>
+#include <zephyr/dt-bindings/gpio/nordic-nrf-gpio.h>
+#include <zephyr/drivers/gpio/gpio_utils.h>
+
+#include <zephyr/kernel.h>
+#include <zephyr/device.h>
+
+#include <zephyr/ipc/ipc_service.h>
+
+#include <nrfe_gpio.h>
+
+#ifdef CONFIG_MULTITHREADING
+K_SEM_DEFINE(bound_sem, 0, 1);
+#else
+volatile uint32_t bound_sem = 1;
+#endif
+
+static void ep_bound(void *priv)
+{
+#ifdef CONFIG_MULTITHREADING
+	k_sem_give(&bound_sem);
+#else
+	bound_sem = 0;
+#endif
+}
+
+static void ep_recv(const void *data, size_t len, void *priv)
+{
+}
+
+static struct ipc_ept_cfg ep_cfg = {
+	.cb = {
+		.bound = ep_bound,
+		.received = ep_recv,
+	},
+};
+
+struct ipc_ept ep;
+
+struct gpio_nrfe_data {
+	/* gpio_driver_data needs to be first */
+	struct gpio_driver_data common;
+};
+
+struct gpio_nrfe_cfg {
+	/* gpio_driver_config needs to be first */
+	struct gpio_driver_config common;
+	uint8_t port_num;
+};
+
+static inline const struct gpio_nrfe_cfg *get_port_cfg(const struct device *port)
+{
+	return port->config;
+}
+
+static int gpio_nrfx_pin_configure(const struct device *port, gpio_pin_t pin, gpio_flags_t flags)
+{
+	nrfe_gpio_data_packet_t msg = {.opcode = NRFE_GPIO_PIN_CONFIGURE,
+				       .pin = pin,
+				       .port = get_port_cfg(port)->port_num,
+				       .flags = flags};
+
+	int ret = ipc_service_send(&ep, (void *)(&msg), sizeof(nrfe_gpio_data_packet_t));
+
+	if (ret < 0) {
+		return ret;
+	}
+
+	return 0;
+}
+
+static int gpio_nrfx_port_set_masked_raw(const struct device *port, gpio_port_pins_t mask,
+					 gpio_port_value_t value)
+{
+
+	const uint32_t set_mask = value & mask;
+	const uint32_t clear_mask = (~set_mask) & mask;
+
+	nrfe_gpio_data_packet_t msg = {
+		.opcode = NRFE_GPIO_PIN_SET, .pin = set_mask, .port = get_port_cfg(port)->port_num};
+
+	int ret = ipc_service_send(&ep, (void *)(&msg), sizeof(nrfe_gpio_data_packet_t));
+
+	if (ret < 0) {
+		return ret;
+	}
+
+	msg.opcode = NRFE_GPIO_PIN_CLEAR;
+	msg.pin = clear_mask;
+
+	ret = ipc_service_send(&ep, (void *)(&msg), sizeof(nrfe_gpio_data_packet_t));
+
+	if (ret < 0) {
+		return ret;
+	}
+
+	return ret;
+}
+
+static int gpio_nrfx_port_set_bits_raw(const struct device *port, gpio_port_pins_t mask)
+{
+	nrfe_gpio_data_packet_t msg = {
+		.opcode = NRFE_GPIO_PIN_SET, .pin = mask, .port = get_port_cfg(port)->port_num};
+
+	int ret = ipc_service_send(&ep, (void *)(&msg), sizeof(nrfe_gpio_data_packet_t));
+
+	if (ret < 0) {
+		return ret;
+	}
+
+	return ret;
+}
+
+static int gpio_nrfx_port_clear_bits_raw(const struct device *port, gpio_port_pins_t mask)
+{
+	nrfe_gpio_data_packet_t msg = {
+		.opcode = NRFE_GPIO_PIN_CLEAR, .pin = mask, .port = get_port_cfg(port)->port_num};
+
+	int ret = ipc_service_send(&ep, (void *)(&msg), sizeof(nrfe_gpio_data_packet_t));
+
+	if (ret < 0) {
+		return ret;
+	}
+
+	return ret;
+}
+
+static int gpio_nrfx_port_toggle_bits(const struct device *port, gpio_port_pins_t mask)
+{
+	nrfe_gpio_data_packet_t msg = {
+		.opcode = NRFE_GPIO_PIN_TOGGLE, .pin = mask, .port = get_port_cfg(port)->port_num};
+
+	int ret = ipc_service_send(&ep, (void *)(&msg), sizeof(nrfe_gpio_data_packet_t));
+
+	if (ret < 0) {
+		return ret;
+	}
+
+	return ret;
+}
+
+static int gpio_nrfe_init(const struct device *port)
+{
+	const struct device *ipc0_instance = DEVICE_DT_GET(DT_NODELABEL(ipc0));
+
+	int ret = ipc_service_open_instance(ipc0_instance);
+
+	if ((ret < 0) && (ret != -EALREADY)) {
+		return ret;
+	}
+
+	ret = ipc_service_register_endpoint(ipc0_instance, &ep, &ep_cfg);
+	if (ret < 0) {
+		return ret;
+	}
+
+	/* Wait for endpoint to be bound */
+#ifdef CONFIG_MULTITHREADING
+	k_sem_take(&bound_sem, K_FOREVER);
+#else
+	while (bound_sem != 0) {
+	};
+#endif
+
+	return 0;
+}
+
+static const struct gpio_driver_api gpio_nrfx_drv_api_funcs = {
+	.pin_configure = gpio_nrfx_pin_configure,
+	.port_set_masked_raw = gpio_nrfx_port_set_masked_raw,
+	.port_set_bits_raw = gpio_nrfx_port_set_bits_raw,
+	.port_clear_bits_raw = gpio_nrfx_port_clear_bits_raw,
+	.port_toggle_bits = gpio_nrfx_port_toggle_bits,
+};
+
+/* Device instantiation is done with node labels because 'port_num' is
+ * the peripheral number by SoC numbering. We therefore cannot use
+ * DT_INST APIs here without wider changes.
+ */
+
+#define EGPIO_NRF_DEVICE(id)                                                                       \
+	static const struct gpio_nrfe_cfg gpio_nrfx_p##id##_cfg = {                                \
+		.common =                                                                          \
+			{                                                                          \
+				.port_pin_mask = GPIO_PORT_PIN_MASK_FROM_DT_INST(id),              \
+			},                                                                         \
+		.port_num = DT_INST_PROP(id, port),                                                \
+	};                                                                                         \
+                                                                                                   \
+	static struct gpio_nrfe_data gpio_nrfx_p##id##_data;                                       \
+                                                                                                   \
+	DEVICE_DT_INST_DEFINE(id, gpio_nrfe_init, NULL, &gpio_nrfx_p##id##_data,                   \
+			      &gpio_nrfx_p##id##_cfg, POST_KERNEL, CONFIG_GPIO_INIT_PRIORITY,      \
+			      &gpio_nrfx_drv_api_funcs);
+
+DT_INST_FOREACH_STATUS_OKAY(EGPIO_NRF_DEVICE)

dts/bindings/gpio/nordic,nrf-egpio.yaml

@@ -0,0 +1,61 @@
+# Copyright (c) 2024 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+
+description: NRF eGPIO node
+
+compatible: "nordic,nrf-egpio"
+
+include: [base.yaml]
+
+properties:
+  ngpios:
+    type: int
+    default: 32
+    description: |
+        This property indicates the number of in-use slots of available slots
+        for GPIOs. The typical example is something like this: the hardware
+        register is 32 bits wide, but only 18 of the bits have a physical
+        counterpart. The driver is generally written so that all 32 bits can
+        be used, but the IP block is reused in a lot of designs, some using
+        all 32 bits, some using 18 and some using 12. In this case, setting
+        "ngpios = <18>;" informs the driver that only the first 18 GPIOs, at
+        local offset 0 .. 17, are in use.  For cases in which there might be
+        holes in the slot range, this value should be the max slot number+1.
+  gpio-reserved-ranges:
+    type: array
+    description: |
+        If not all the GPIOs at offsets 0...N-1 are usable for ngpios = <N>, then
+        this property contains an additional set of tuples which specify which GPIOs
+        are unusable. This property indicates the start and size of the GPIOs
+        that can't be used.
+
+        For example, setting "gpio-reserved-ranges = <3 2>, <10 1>;" means that
+        GPIO offsets 3, 4, and 10 are not usable, even if ngpios = <18>.
+
+  "#gpio-cells":
+    type: int
+    required: true
+    description: Number of items to expect in a GPIO specifier
+    const: 2
+
+  sense-edge-mask:
+    type: int
+    description: |
+      Mask of pins that use the GPIO sense mechanism for edge detection.
+      Pins not included in the mask use GPIOTE channels in the event mode.
+
+  port:
+    type: int
+    required: true
+    description: |
+      The GPIO port number. GPIO port P0 has:
+
+        port = <0>;
+
+      And P1 has:
+
+        port = <1>;
+
+gpio-cells:
+  - pin
+  - flags

modules/hal_nordic/CMakeLists.txt

@@ -7,6 +7,7 @@ endif (CONFIG_NRF_802154_RADIO_DRIVER OR CONFIG_NRF_802154_SERIALIZATION)
 
 add_subdirectory_ifdef(CONFIG_HAS_NRFX nrfx)
 add_subdirectory_ifdef(CONFIG_HAS_NRFS nrfs)
+add_subdirectory_ifdef(CONFIG_HAS_NRFE nrfe)
 
 if(CONFIG_NRF_REGTOOL_GENERATE_UICR)
   list(APPEND nrf_regtool_components GENERATE:UICR)

modules/hal_nordic/Kconfig

@@ -237,4 +237,5 @@ endmenu # HAS_NORDIC_DRIVERS
 
 rsource "nrfs/Kconfig"
 rsource "nrfx/Kconfig"
+rsource "nrfe/Kconfig"
 rsource "Kconfig.nrf_regtool"

modules/hal_nordic/nrfe/CMakeLists.txt

@@ -0,0 +1,15 @@
+# Copyright (c) 2024 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+
+zephyr_library()
+
+# The nrfe source directory can be override through the definition of the NRFE_DIR symbol
+# during the invocation of the build system
+if(NOT DEFINED NRFE_DIR)
+  set(NRFE_DIR ${ZEPHYR_CURRENT_MODULE_DIR}/nrfe CACHE PATH "nrfe Directory")
+endif()
+
+set(INC_DIR ${NRFE_DIR}/include)
+
+zephyr_include_directories(${NRFE_DIR})
+zephyr_include_directories(${INC_DIR})

modules/hal_nordic/nrfe/Kconfig

@@ -0,0 +1,18 @@
+# Copyright (c) 2016 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+
+config HAS_NRFE
+	bool
+
+menu "nrfe drivers"
+	depends on HAS_NRFE
+
+config NRFE_GPIO
+	bool
+
+config NRFE_GPIO2
+	bool "eGPIO2 driver instance"
+	depends on $(dt_nodelabel_has_compat,egpio2,$(DT_COMPAT_NORDIC_NRF_EGPIO))
+	select NRFE_GPIO
+
+endmenu # "nrfe drivers"

soc/nordic/common/Kconfig.peripherals

@@ -93,6 +93,9 @@ config HAS_HW_NRF_GPIOTE130
 config HAS_HW_NRF_GPIOTE131
 	def_bool $(dt_nodelabel_enabled_with_compat,gpiote131,$(DT_COMPAT_NORDIC_NRF_GPIOTE))
 
+config HAS_HW_NRF_EGPIO2
+	def_bool $(dt_nodelabel_enabled_with_compat,egpio2,$(DT_COMPAT_NORDIC_NRF_EGPIO))
+
 config HAS_HW_NRF_GRTC
 	def_bool $(dt_compat_enabled,$(DT_COMPAT_NORDIC_NRF_GRTC))
 

soc/nordic/common/vpr/Kconfig

@@ -13,6 +13,7 @@ config RISCV_CORE_NORDIC_VPR
 	select RISCV_ISA_EXT_M
 	select RISCV_ISA_EXT_C
 	select RISCV_ISA_EXT_ZICSR
+	select RISCV_ISA_EXT_ZIFENCEI
 	select RISCV_SOC_HAS_ISR_STACKING
 	select RISCV_HAS_CLIC
 	select RISCV_SOC_CONTEXT_SAVE

soc/nordic/nrf54l/Kconfig

@@ -5,6 +5,7 @@
 
 config SOC_SERIES_NRF54LX
 	select SOC_COMPATIBLE_NRF54LX
+	select HAS_NRFE
 	select HAS_NRFX
 	select HAS_NORDIC_DRIVERS
 	select HAS_SEGGER_RTT if ZEPHYR_SEGGER_MODULE