drivers: led: npm1300: nPM1300 LED driver

Added LED driver for nPM1300 PMIC

Signed-off-by: Andy Sinclair <andy.sinclair@nordicsemi.no>

drivers/led/CMakeLists.txt

@@ -7,6 +7,7 @@ zephyr_library()
 zephyr_library_sources_ifdef(CONFIG_HT16K33 ht16k33.c)
 zephyr_library_sources_ifdef(CONFIG_IS31FL3216A is31fl3216a.c)
 zephyr_library_sources_ifdef(CONFIG_LED_GPIO led_gpio.c)
+zephyr_library_sources_ifdef(CONFIG_LED_NPM1300 led_npm1300.c)
 zephyr_library_sources_ifdef(CONFIG_LED_PWM led_pwm.c)
 zephyr_library_sources_ifdef(CONFIG_LED_XEC led_mchp_xec.c)
 zephyr_library_sources_ifdef(CONFIG_LP3943 lp3943.c)

drivers/led/Kconfig

@@ -33,6 +33,7 @@ source "drivers/led/Kconfig.lp3943"
 source "drivers/led/Kconfig.lp503x"
 source "drivers/led/Kconfig.lp5562"
 source "drivers/led/Kconfig.lp5569"
+source "drivers/led/Kconfig.npm1300"
 source "drivers/led/Kconfig.pca9633"
 source "drivers/led/Kconfig.pwm"
 source "drivers/led/Kconfig.tlc59108"

drivers/led/Kconfig.npm1300

@@ -0,0 +1,11 @@
+# Copyright (c) 2023 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+
+config LED_NPM1300
+	bool "nPM1300 LED driver"
+	default y
+	depends on DT_HAS_NORDIC_NPM1300_LED_ENABLED
+	select I2C
+	select MFD
+	help
+	  Enable the nPM1300 LED driver.

drivers/led/led_npm1300.c

@@ -0,0 +1,100 @@
+/*
+ * Copyright (c) 2023 Nordic Semiconductor ASA
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#define DT_DRV_COMPAT nordic_npm1300_led
+
+#include <errno.h>
+
+#include <zephyr/device.h>
+#include <zephyr/drivers/led.h>
+#include <zephyr/drivers/mfd/npm1300.h>
+
+/* nPM1300 LED base address */
+#define NPM_LED_BASE 0x0AU
+
+/* nPM1300 LED register offsets */
+#define NPM_LED_OFFSET_MODE 0x00U
+#define NPM_LED_OFFSET_SET  0x03U
+#define NPM_LED_OFFSET_CLR  0x04U
+
+/* nPM1300 Channel counts */
+#define NPM1300_LED_PINS 3U
+
+/* nPM1300 LED modes */
+#define NPM_LED_HOST 2U
+
+struct led_npm1300_config {
+	const struct device *mfd;
+	uint8_t mode[NPM1300_LED_PINS];
+};
+
+static int led_npm1300_on(const struct device *dev, uint32_t led)
+{
+	const struct led_npm1300_config *config = dev->config;
+
+	if (led >= NPM1300_LED_PINS) {
+		return -EINVAL;
+	}
+
+	if (config->mode[led] != NPM_LED_HOST) {
+		return -EPERM;
+	}
+
+	return mfd_npm1300_reg_write(config->mfd, NPM_LED_BASE, NPM_LED_OFFSET_SET + (led * 2U),
+				     1U);
+}
+
+static int led_npm1300_off(const struct device *dev, uint32_t led)
+{
+	const struct led_npm1300_config *config = dev->config;
+
+	if (led >= NPM1300_LED_PINS) {
+		return -EINVAL;
+	}
+
+	if (config->mode[led] != NPM_LED_HOST) {
+		return -EPERM;
+	}
+
+	return mfd_npm1300_reg_write(config->mfd, NPM_LED_BASE, NPM_LED_OFFSET_CLR + (led * 2U),
+				     1U);
+}
+
+static const struct led_driver_api led_npm1300_api = {
+	.on = led_npm1300_on,
+	.off = led_npm1300_off,
+};
+
+static int led_npm1300_init(const struct device *dev)
+{
+	const struct led_npm1300_config *config = dev->config;
+
+	if (!device_is_ready(config->mfd)) {
+		return -ENODEV;
+	}
+
+	for (uint8_t led = 0U; led < NPM1300_LED_PINS; led++) {
+		int ret = mfd_npm1300_reg_write(config->mfd, NPM_LED_BASE,
+						NPM_LED_OFFSET_MODE + led, config->mode[led]);
+
+		if (ret < 0) {
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+#define LED_NPM1300_DEFINE(n)                                                                      \
+	static const struct led_npm1300_config led_npm1300_config##n = {                           \
+		.mfd = DEVICE_DT_GET(DT_INST_PARENT(n)),                                           \
+		.mode = {DT_INST_ENUM_IDX(n, nordic_led0_mode),                                    \
+			 DT_INST_ENUM_IDX(n, nordic_led1_mode),                                    \
+			 DT_INST_ENUM_IDX(n, nordic_led2_mode)}};                                  \
+                                                                                                   \
+	DEVICE_DT_INST_DEFINE(n, &led_npm1300_init, NULL, NULL, &led_npm1300_config##n,            \
+			      POST_KERNEL, CONFIG_LED_INIT_PRIORITY, &led_npm1300_api);
+
+DT_INST_FOREACH_STATUS_OKAY(LED_NPM1300_DEFINE)

dts/bindings/led/nordic,npm1300-led.yaml

@@ -0,0 +1,39 @@
+# Copyright (c) 2023 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+
+description: |
+  Nordic nPM1300 LED controller
+
+  The nPM1300 has three LED outputs.
+  Each LED can automatically display error or charging status,
+  or be controlled by software.
+
+compatible: "nordic,npm1300-led"
+
+properties:
+  nordic,led0-mode:
+    type: string
+    required: true
+    enum:
+    - error
+    - charging
+    - host
+    description: LED 0 mode
+
+  nordic,led1-mode:
+    type: string
+    required: true
+    enum:
+    - error
+    - charging
+    - host
+    description: LED 1 mode
+
+  nordic,led2-mode:
+    type: string
+    required: true
+    enum:
+    - error
+    - charging
+    - host
+    description: LED 2 mode