Loading Documentation/devicetree/bindings/leds/leds-aw2013.txt 0 → 100644 +75 −0 Original line number Diff line number Diff line Binding for RGB LEDs connected to AW2013. AWINIC AW2013 RGB LED driver is used to provide red/green/blue led blink or glowing to notify user for different system events, such as missed call, new sms, low battery. AW2013 RGB LED is connected through I2C. Required properties: - compatible : should be compatible = "awinic,aw2013" - reg : i2c slave address of the device - vdd-supply : Power supply needed to power up the device - vcc-supply : Power source required to power up i2c bus LED required sub-node properties: - aw2013,name : name of the LED - aw2013,id : id of the LED - aw2013,max-brightness: max brightness set of the LED - aw2013,max-current : max current set of the LED - aw2013,rise-time-ms : the rise time when led in breathe mode - aw2013,hold-time-ms : the hold time when led in breathe mode - aw2013,fall-time-ms : the fall time when led in breathe mode - aw2013,off-time-ms : the off time when led in breathe mode The definition of each time described as shown in figure: /-----------\ / | \ /| | |\ / | | | \----------- |hold_time_ms | | | | | rise_time_ms fall_time_ms | off_time_ms Example: aw2013@45 { compatible = "awinic,aw2013"; reg = <0x45>; vdd-supply = <&pm8909_l17>; vcc-supply = <&pm8909_l6>; aw2013,red { aw2013,name = "red"; aw2013,id = <0>; aw2013,max-brightness = <255>; aw2013,max-current = <1>; aw2013,rise-time-ms = <2>; aw2013,hold-time-ms = <1>; aw2013,fall-time-ms = <2>; aw2013,off-time-ms = <1>; }; aw2013,green { aw2013,name = "green"; aw2013,id = <1>; aw2013,max-brightness = <255>; aw2013,max-current = <1>; aw2013,rise-time-ms = <2>; aw2013,hold-time-ms = <1>; aw2013,fall-time-ms = <2>; aw2013,off-time-ms = <1>; }; aw2013,blue { aw2013,name = "blue"; aw2013,id = <2>; aw2013,max-brightness = <255>; aw2013,max-current = <1>; aw2013,rise-time-ms = <2>; aw2013,hold-time-ms = <1>; aw2013,fall-time-ms = <2>; aw2013,off-time-ms = <1>; }; }; Documentation/devicetree/bindings/vendor-prefixes.txt +1 −0 Original line number Diff line number Diff line Loading @@ -23,6 +23,7 @@ armadeus ARMadeus Systems SARL atmel Atmel Corporation auo AU Optronics Corporation avago Avago Technologies awinic AWINIC Technology Co.Ltd bosch Bosch Sensortec GmbH brcm Broadcom Corporation buffalo Buffalo, Inc. Loading drivers/leds/Kconfig +7 −0 Original line number Diff line number Diff line Loading @@ -535,6 +535,13 @@ config LEDS_VERSATILE This option enabled support for the LEDs on the ARM Versatile and RealView boards. Say Y to enabled these. config LEDS_AW2013 tristate "LED support for AW2013" depends on LEDS_CLASS && I2C help This option enables support for the AW2013 RGB LED connected through I2C. Say Y to enable support for the AW2013 LED. comment "LED Triggers" source "drivers/leds/trigger/Kconfig" Loading drivers/leds/Makefile +1 −0 Original line number Diff line number Diff line Loading @@ -59,6 +59,7 @@ obj-$(CONFIG_LEDS_QPNP_WLED) += leds-qpnp-wled.o obj-$(CONFIG_LEDS_SYSCON) += leds-syscon.o obj-$(CONFIG_LEDS_VERSATILE) += leds-versatile.o obj-$(CONFIG_LEDS_MENF21BMC) += leds-menf21bmc.o obj-$(CONFIG_LEDS_AW2013) += leds-aw2013.o # LED SPI Drivers obj-$(CONFIG_LEDS_DAC124S085) += leds-dac124s085.o Loading drivers/leds/leds-aw2013.c 0 → 100644 +656 −0 Original line number Diff line number Diff line /* * Copyright (c) 2015, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and * only version 2 as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * */ #include <linux/delay.h> #include <linux/i2c.h> #include <linux/init.h> #include <linux/leds.h> #include <linux/module.h> #include <linux/mutex.h> #include <linux/slab.h> #include <linux/regulator/consumer.h> #include <linux/leds-aw2013.h> /* register address */ #define AW_REG_RESET 0x00 #define AW_REG_GLOBAL_CONTROL 0x01 #define AW_REG_LED_STATUS 0x02 #define AW_REG_LED_ENABLE 0x30 #define AW_REG_LED_CONFIG_BASE 0x31 #define AW_REG_LED_BRIGHTNESS_BASE 0x34 #define AW_REG_TIMESET0_BASE 0x37 #define AW_REG_TIMESET1_BASE 0x38 /* register bits */ #define AW2013_CHIPID 0x33 #define AW_LED_MOUDLE_ENABLE_MASK 0x01 #define AW_LED_FADE_OFF_MASK 0x40 #define AW_LED_FADE_ON_MASK 0x20 #define AW_LED_BREATHE_MODE_MASK 0x10 #define AW_LED_RESET_MASK 0x55 #define AW_LED_RESET_DELAY 8 #define AW2013_VDD_MIN_UV 2600000 #define AW2013_VDD_MAX_UV 3300000 #define AW2013_VI2C_MIN_UV 1800000 #define AW2013_VI2C_MAX_UV 1800000 #define MAX_RISE_TIME_MS 7 #define MAX_HOLD_TIME_MS 5 #define MAX_FALL_TIME_MS 7 #define MAX_OFF_TIME_MS 5 struct aw2013_led { struct i2c_client *client; struct led_classdev cdev; struct aw2013_platform_data *pdata; struct work_struct brightness_work; struct mutex lock; struct regulator *vdd; struct regulator *vcc; int num_leds; int id; bool poweron; }; static int aw2013_write(struct aw2013_led *led, u8 reg, u8 val) { return i2c_smbus_write_byte_data(led->client, reg, val); } static int aw2013_read(struct aw2013_led *led, u8 reg, u8 *val) { s32 ret; ret = i2c_smbus_read_byte_data(led->client, reg); if (ret < 0) return ret; *val = ret; return 0; } static int aw2013_power_on(struct aw2013_led *led, bool on) { int rc; if (on) { rc = regulator_enable(led->vdd); if (rc) { dev_err(&led->client->dev, "Regulator vdd enable failed rc=%d\n", rc); return rc; } rc = regulator_enable(led->vcc); if (rc) { dev_err(&led->client->dev, "Regulator vcc enable failed rc=%d\n", rc); goto fail_enable_reg; } led->poweron = true; } else { rc = regulator_disable(led->vdd); if (rc) { dev_err(&led->client->dev, "Regulator vdd disable failed rc=%d\n", rc); return rc; } rc = regulator_disable(led->vcc); if (rc) { dev_err(&led->client->dev, "Regulator vcc disable failed rc=%d\n", rc); goto fail_disable_reg; } led->poweron = false; } return rc; fail_enable_reg: rc = regulator_disable(led->vdd); if (rc) dev_err(&led->client->dev, "Regulator vdd disable failed rc=%d\n", rc); return rc; fail_disable_reg: rc = regulator_enable(led->vdd); if (rc) dev_err(&led->client->dev, "Regulator vdd enable failed rc=%d\n", rc); return rc; } static int aw2013_power_init(struct aw2013_led *led, bool on) { int rc; if (on) { led->vdd = regulator_get(&led->client->dev, "vdd"); if (IS_ERR(led->vdd)) { rc = PTR_ERR(led->vdd); dev_err(&led->client->dev, "Regulator get failed vdd rc=%d\n", rc); return rc; } if (regulator_count_voltages(led->vdd) > 0) { rc = regulator_set_voltage(led->vdd, AW2013_VDD_MIN_UV, AW2013_VDD_MAX_UV); if (rc) { dev_err(&led->client->dev, "Regulator set_vtg failed vdd rc=%d\n", rc); goto reg_vdd_put; } } led->vcc = regulator_get(&led->client->dev, "vcc"); if (IS_ERR(led->vcc)) { rc = PTR_ERR(led->vcc); dev_err(&led->client->dev, "Regulator get failed vcc rc=%d\n", rc); goto reg_vdd_set_vtg; } if (regulator_count_voltages(led->vcc) > 0) { rc = regulator_set_voltage(led->vcc, AW2013_VI2C_MIN_UV, AW2013_VI2C_MAX_UV); if (rc) { dev_err(&led->client->dev, "Regulator set_vtg failed vcc rc=%d\n", rc); goto reg_vcc_put; } } } else { if (regulator_count_voltages(led->vdd) > 0) regulator_set_voltage(led->vdd, 0, AW2013_VDD_MAX_UV); regulator_put(led->vdd); if (regulator_count_voltages(led->vcc) > 0) regulator_set_voltage(led->vcc, 0, AW2013_VI2C_MAX_UV); regulator_put(led->vcc); } return 0; reg_vcc_put: regulator_put(led->vcc); reg_vdd_set_vtg: if (regulator_count_voltages(led->vdd) > 0) regulator_set_voltage(led->vdd, 0, AW2013_VDD_MAX_UV); reg_vdd_put: regulator_put(led->vdd); return rc; } static void aw2013_brightness_work(struct work_struct *work) { struct aw2013_led *led = container_of(work, struct aw2013_led, brightness_work); u8 val; mutex_lock(&led->pdata->led->lock); /* enable regulators if they are disabled */ if (!led->pdata->led->poweron) { if (aw2013_power_on(led->pdata->led, true)) { dev_err(&led->pdata->led->client->dev, "power on failed"); mutex_unlock(&led->pdata->led->lock); return; } } if (led->cdev.brightness > 0) { if (led->cdev.brightness > led->cdev.max_brightness) led->cdev.brightness = led->cdev.max_brightness; aw2013_write(led, AW_REG_GLOBAL_CONTROL, AW_LED_MOUDLE_ENABLE_MASK); aw2013_write(led, AW_REG_LED_CONFIG_BASE + led->id, led->pdata->max_current); aw2013_write(led, AW_REG_LED_BRIGHTNESS_BASE + led->id, led->cdev.brightness); aw2013_read(led, AW_REG_LED_ENABLE, &val); aw2013_write(led, AW_REG_LED_ENABLE, val | (1 << led->id)); } else { aw2013_read(led, AW_REG_LED_ENABLE, &val); aw2013_write(led, AW_REG_LED_ENABLE, val & (~(1 << led->id))); } aw2013_read(led, AW_REG_LED_ENABLE, &val); /* * If value in AW_REG_LED_ENABLE is 0, it means the RGB leds are * all off. So we need to power it off. */ if (val == 0) { if (aw2013_power_on(led->pdata->led, false)) { dev_err(&led->pdata->led->client->dev, "power off failed"); mutex_unlock(&led->pdata->led->lock); return; } } mutex_unlock(&led->pdata->led->lock); } static void aw2013_led_blink_set(struct aw2013_led *led, unsigned long blinking) { u8 val; /* enable regulators if they are disabled */ if (!led->pdata->led->poweron) { if (aw2013_power_on(led->pdata->led, true)) { dev_err(&led->pdata->led->client->dev, "power on failed"); return; } } led->cdev.brightness = blinking ? led->cdev.max_brightness : 0; if (blinking > 0) { aw2013_write(led, AW_REG_GLOBAL_CONTROL, AW_LED_MOUDLE_ENABLE_MASK); aw2013_write(led, AW_REG_LED_CONFIG_BASE + led->id, AW_LED_FADE_OFF_MASK | AW_LED_FADE_ON_MASK | AW_LED_BREATHE_MODE_MASK | led->pdata->max_current); aw2013_write(led, AW_REG_LED_BRIGHTNESS_BASE + led->id, led->cdev.brightness); aw2013_write(led, AW_REG_TIMESET0_BASE + led->id * 3, led->pdata->rise_time_ms << 4 | led->pdata->hold_time_ms); aw2013_write(led, AW_REG_TIMESET1_BASE + led->id * 3, led->pdata->fall_time_ms << 4 | led->pdata->off_time_ms); aw2013_read(led, AW_REG_LED_ENABLE, &val); aw2013_write(led, AW_REG_LED_ENABLE, val | (1 << led->id)); } else { aw2013_read(led, AW_REG_LED_ENABLE, &val); aw2013_write(led, AW_REG_LED_ENABLE, val & (~(1 << led->id))); } aw2013_read(led, AW_REG_LED_ENABLE, &val); /* * If value in AW_REG_LED_ENABLE is 0, it means the RGB leds are * all off. So we need to power it off. */ if (val == 0) { if (aw2013_power_on(led->pdata->led, false)) { dev_err(&led->pdata->led->client->dev, "power off failed"); return; } } } static void aw2013_set_brightness(struct led_classdev *cdev, enum led_brightness brightness) { struct aw2013_led *led = container_of(cdev, struct aw2013_led, cdev); led->cdev.brightness = brightness; schedule_work(&led->brightness_work); } static ssize_t aw2013_store_blink(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) { unsigned long blinking; struct led_classdev *led_cdev = dev_get_drvdata(dev); struct aw2013_led *led = container_of(led_cdev, struct aw2013_led, cdev); ssize_t ret = -EINVAL; ret = kstrtoul(buf, 10, &blinking); if (ret) return ret; mutex_lock(&led->pdata->led->lock); aw2013_led_blink_set(led, blinking); mutex_unlock(&led->pdata->led->lock); return len; } static ssize_t aw2013_led_time_show(struct device *dev, struct device_attribute *attr, char *buf) { struct led_classdev *led_cdev = dev_get_drvdata(dev); struct aw2013_led *led = container_of(led_cdev, struct aw2013_led, cdev); return snprintf(buf, PAGE_SIZE, "%d %d %d %d\n", led->pdata->rise_time_ms, led->pdata->hold_time_ms, led->pdata->fall_time_ms, led->pdata->off_time_ms); } static ssize_t aw2013_led_time_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) { struct led_classdev *led_cdev = dev_get_drvdata(dev); struct aw2013_led *led = container_of(led_cdev, struct aw2013_led, cdev); int rc, rise_time_ms, hold_time_ms, fall_time_ms, off_time_ms; rc = sscanf(buf, "%d %d %d %d", &rise_time_ms, &hold_time_ms, &fall_time_ms, &off_time_ms); mutex_lock(&led->pdata->led->lock); led->pdata->rise_time_ms = (rise_time_ms > MAX_RISE_TIME_MS) ? MAX_RISE_TIME_MS : rise_time_ms; led->pdata->hold_time_ms = (hold_time_ms > MAX_HOLD_TIME_MS) ? MAX_HOLD_TIME_MS : hold_time_ms; led->pdata->fall_time_ms = (fall_time_ms > MAX_FALL_TIME_MS) ? MAX_FALL_TIME_MS : fall_time_ms; led->pdata->off_time_ms = (off_time_ms > MAX_OFF_TIME_MS) ? MAX_OFF_TIME_MS : off_time_ms; aw2013_led_blink_set(led, 1); mutex_unlock(&led->pdata->led->lock); return len; } static DEVICE_ATTR(blink, 0664, NULL, aw2013_store_blink); static DEVICE_ATTR(led_time, 0664, aw2013_led_time_show, aw2013_led_time_store); static struct attribute *aw2013_led_attributes[] = { &dev_attr_blink.attr, &dev_attr_led_time.attr, NULL, }; static struct attribute_group aw2013_led_attr_group = { .attrs = aw2013_led_attributes }; static int aw_2013_check_chipid(struct aw2013_led *led) { u8 val; aw2013_write(led, AW_REG_RESET, AW_LED_RESET_MASK); usleep(AW_LED_RESET_DELAY); aw2013_read(led, AW_REG_RESET, &val); if (val == AW2013_CHIPID) return 0; else return -EINVAL; } static int aw2013_led_err_handle(struct aw2013_led *led_array, int parsed_leds) { int i; /* * If probe fails, cannot free resource of all LEDs, only free * resources of LEDs which have allocated these resource really. */ for (i = 0; i < parsed_leds; i++) { sysfs_remove_group(&led_array[i].cdev.dev->kobj, &aw2013_led_attr_group); led_classdev_unregister(&led_array[i].cdev); cancel_work_sync(&led_array[i].brightness_work); devm_kfree(&led_array->client->dev, led_array[i].pdata); led_array[i].pdata = NULL; } return i; } static int aw2013_led_parse_child_node(struct aw2013_led *led_array, struct device_node *node) { struct aw2013_led *led; struct device_node *temp; struct aw2013_platform_data *pdata; int rc = 0, parsed_leds = 0; for_each_child_of_node(node, temp) { led = &led_array[parsed_leds]; led->client = led_array->client; pdata = devm_kzalloc(&led->client->dev, sizeof(struct aw2013_platform_data), GFP_KERNEL); if (!pdata) { dev_err(&led->client->dev, "Failed to allocate memory\n"); goto free_err; } pdata->led = led_array; led->pdata = pdata; rc = of_property_read_string(temp, "aw2013,name", &led->cdev.name); if (rc < 0) { dev_err(&led->client->dev, "Failure reading led name, rc = %d\n", rc); goto free_pdata; } rc = of_property_read_u32(temp, "aw2013,id", &led->id); if (rc < 0) { dev_err(&led->client->dev, "Failure reading id, rc = %d\n", rc); goto free_pdata; } rc = of_property_read_u32(temp, "aw2013,max-brightness", &led->cdev.max_brightness); if (rc < 0) { dev_err(&led->client->dev, "Failure reading max-brightness, rc = %d\n", rc); goto free_pdata; } rc = of_property_read_u32(temp, "aw2013,max-current", &led->pdata->max_current); if (rc < 0) { dev_err(&led->client->dev, "Failure reading max-current, rc = %d\n", rc); goto free_pdata; } rc = of_property_read_u32(temp, "aw2013,rise-time-ms", &led->pdata->rise_time_ms); if (rc < 0) { dev_err(&led->client->dev, "Failure reading rise-time-ms, rc = %d\n", rc); goto free_pdata; } rc = of_property_read_u32(temp, "aw2013,hold-time-ms", &led->pdata->hold_time_ms); if (rc < 0) { dev_err(&led->client->dev, "Failure reading hold-time-ms, rc = %d\n", rc); goto free_pdata; } rc = of_property_read_u32(temp, "aw2013,fall-time-ms", &led->pdata->fall_time_ms); if (rc < 0) { dev_err(&led->client->dev, "Failure reading fall-time-ms, rc = %d\n", rc); goto free_pdata; } rc = of_property_read_u32(temp, "aw2013,off-time-ms", &led->pdata->off_time_ms); if (rc < 0) { dev_err(&led->client->dev, "Failure reading off-time-ms, rc = %d\n", rc); goto free_pdata; } INIT_WORK(&led->brightness_work, aw2013_brightness_work); led->cdev.brightness_set = aw2013_set_brightness; rc = led_classdev_register(&led->client->dev, &led->cdev); if (rc) { dev_err(&led->client->dev, "unable to register led %d,rc=%d\n", led->id, rc); goto free_pdata; } rc = sysfs_create_group(&led->cdev.dev->kobj, &aw2013_led_attr_group); if (rc) { dev_err(&led->client->dev, "led sysfs rc: %d\n", rc); goto free_class; } parsed_leds++; } return 0; free_class: aw2013_led_err_handle(led_array, parsed_leds); led_classdev_unregister(&led_array[parsed_leds].cdev); cancel_work_sync(&led_array[parsed_leds].brightness_work); devm_kfree(&led->client->dev, led_array[parsed_leds].pdata); led_array[parsed_leds].pdata = NULL; return rc; free_pdata: aw2013_led_err_handle(led_array, parsed_leds); devm_kfree(&led->client->dev, led_array[parsed_leds].pdata); return rc; free_err: aw2013_led_err_handle(led_array, parsed_leds); return rc; } static int aw2013_led_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct aw2013_led *led_array; struct device_node *node; int ret, num_leds = 0; node = client->dev.of_node; if (node == NULL) return -EINVAL; num_leds = of_get_child_count(node); if (!num_leds) return -EINVAL; led_array = devm_kzalloc(&client->dev, (sizeof(struct aw2013_led) * num_leds), GFP_KERNEL); if (!led_array) return -ENOMEM; led_array->client = client; led_array->num_leds = num_leds; mutex_init(&led_array->lock); ret = aw_2013_check_chipid(led_array); if (ret) { dev_err(&client->dev, "Check chip id error\n"); goto free_led_arry; } ret = aw2013_led_parse_child_node(led_array, node); if (ret) { dev_err(&client->dev, "parsed node error\n"); goto free_led_arry; } i2c_set_clientdata(client, led_array); ret = aw2013_power_init(led_array, true); if (ret) { dev_err(&client->dev, "power init failed"); goto fail_parsed_node; } return 0; fail_parsed_node: aw2013_led_err_handle(led_array, num_leds); free_led_arry: mutex_destroy(&led_array->lock); devm_kfree(&client->dev, led_array); led_array = NULL; return ret; } static int aw2013_led_remove(struct i2c_client *client) { struct aw2013_led *led_array = i2c_get_clientdata(client); int i, parsed_leds = led_array->num_leds; for (i = 0; i < parsed_leds; i++) { sysfs_remove_group(&led_array[i].cdev.dev->kobj, &aw2013_led_attr_group); led_classdev_unregister(&led_array[i].cdev); cancel_work_sync(&led_array[i].brightness_work); devm_kfree(&client->dev, led_array[i].pdata); led_array[i].pdata = NULL; } mutex_destroy(&led_array->lock); devm_kfree(&client->dev, led_array); led_array = NULL; return 0; } static const struct i2c_device_id aw2013_led_id[] = { {"aw2013_led", 0}, {}, }; MODULE_DEVICE_TABLE(i2c, aw2013_led_id); static struct of_device_id aw2013_match_table[] = { { .compatible = "awinic,aw2013",}, { }, }; static struct i2c_driver aw2013_led_driver = { .probe = aw2013_led_probe, .remove = aw2013_led_remove, .driver = { .name = "aw2013_led", .owner = THIS_MODULE, .of_match_table = of_match_ptr(aw2013_match_table), }, .id_table = aw2013_led_id, }; static int __init aw2013_led_init(void) { return i2c_add_driver(&aw2013_led_driver); } module_init(aw2013_led_init); static void __exit aw2013_led_exit(void) { i2c_del_driver(&aw2013_led_driver); } module_exit(aw2013_led_exit); MODULE_DESCRIPTION("AWINIC aw2013 LED driver"); MODULE_LICENSE("GPL v2"); Loading
Documentation/devicetree/bindings/leds/leds-aw2013.txt 0 → 100644 +75 −0 Original line number Diff line number Diff line Binding for RGB LEDs connected to AW2013. AWINIC AW2013 RGB LED driver is used to provide red/green/blue led blink or glowing to notify user for different system events, such as missed call, new sms, low battery. AW2013 RGB LED is connected through I2C. Required properties: - compatible : should be compatible = "awinic,aw2013" - reg : i2c slave address of the device - vdd-supply : Power supply needed to power up the device - vcc-supply : Power source required to power up i2c bus LED required sub-node properties: - aw2013,name : name of the LED - aw2013,id : id of the LED - aw2013,max-brightness: max brightness set of the LED - aw2013,max-current : max current set of the LED - aw2013,rise-time-ms : the rise time when led in breathe mode - aw2013,hold-time-ms : the hold time when led in breathe mode - aw2013,fall-time-ms : the fall time when led in breathe mode - aw2013,off-time-ms : the off time when led in breathe mode The definition of each time described as shown in figure: /-----------\ / | \ /| | |\ / | | | \----------- |hold_time_ms | | | | | rise_time_ms fall_time_ms | off_time_ms Example: aw2013@45 { compatible = "awinic,aw2013"; reg = <0x45>; vdd-supply = <&pm8909_l17>; vcc-supply = <&pm8909_l6>; aw2013,red { aw2013,name = "red"; aw2013,id = <0>; aw2013,max-brightness = <255>; aw2013,max-current = <1>; aw2013,rise-time-ms = <2>; aw2013,hold-time-ms = <1>; aw2013,fall-time-ms = <2>; aw2013,off-time-ms = <1>; }; aw2013,green { aw2013,name = "green"; aw2013,id = <1>; aw2013,max-brightness = <255>; aw2013,max-current = <1>; aw2013,rise-time-ms = <2>; aw2013,hold-time-ms = <1>; aw2013,fall-time-ms = <2>; aw2013,off-time-ms = <1>; }; aw2013,blue { aw2013,name = "blue"; aw2013,id = <2>; aw2013,max-brightness = <255>; aw2013,max-current = <1>; aw2013,rise-time-ms = <2>; aw2013,hold-time-ms = <1>; aw2013,fall-time-ms = <2>; aw2013,off-time-ms = <1>; }; };
Documentation/devicetree/bindings/vendor-prefixes.txt +1 −0 Original line number Diff line number Diff line Loading @@ -23,6 +23,7 @@ armadeus ARMadeus Systems SARL atmel Atmel Corporation auo AU Optronics Corporation avago Avago Technologies awinic AWINIC Technology Co.Ltd bosch Bosch Sensortec GmbH brcm Broadcom Corporation buffalo Buffalo, Inc. Loading
drivers/leds/Kconfig +7 −0 Original line number Diff line number Diff line Loading @@ -535,6 +535,13 @@ config LEDS_VERSATILE This option enabled support for the LEDs on the ARM Versatile and RealView boards. Say Y to enabled these. config LEDS_AW2013 tristate "LED support for AW2013" depends on LEDS_CLASS && I2C help This option enables support for the AW2013 RGB LED connected through I2C. Say Y to enable support for the AW2013 LED. comment "LED Triggers" source "drivers/leds/trigger/Kconfig" Loading
drivers/leds/Makefile +1 −0 Original line number Diff line number Diff line Loading @@ -59,6 +59,7 @@ obj-$(CONFIG_LEDS_QPNP_WLED) += leds-qpnp-wled.o obj-$(CONFIG_LEDS_SYSCON) += leds-syscon.o obj-$(CONFIG_LEDS_VERSATILE) += leds-versatile.o obj-$(CONFIG_LEDS_MENF21BMC) += leds-menf21bmc.o obj-$(CONFIG_LEDS_AW2013) += leds-aw2013.o # LED SPI Drivers obj-$(CONFIG_LEDS_DAC124S085) += leds-dac124s085.o Loading
drivers/leds/leds-aw2013.c 0 → 100644 +656 −0 Original line number Diff line number Diff line /* * Copyright (c) 2015, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and * only version 2 as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * */ #include <linux/delay.h> #include <linux/i2c.h> #include <linux/init.h> #include <linux/leds.h> #include <linux/module.h> #include <linux/mutex.h> #include <linux/slab.h> #include <linux/regulator/consumer.h> #include <linux/leds-aw2013.h> /* register address */ #define AW_REG_RESET 0x00 #define AW_REG_GLOBAL_CONTROL 0x01 #define AW_REG_LED_STATUS 0x02 #define AW_REG_LED_ENABLE 0x30 #define AW_REG_LED_CONFIG_BASE 0x31 #define AW_REG_LED_BRIGHTNESS_BASE 0x34 #define AW_REG_TIMESET0_BASE 0x37 #define AW_REG_TIMESET1_BASE 0x38 /* register bits */ #define AW2013_CHIPID 0x33 #define AW_LED_MOUDLE_ENABLE_MASK 0x01 #define AW_LED_FADE_OFF_MASK 0x40 #define AW_LED_FADE_ON_MASK 0x20 #define AW_LED_BREATHE_MODE_MASK 0x10 #define AW_LED_RESET_MASK 0x55 #define AW_LED_RESET_DELAY 8 #define AW2013_VDD_MIN_UV 2600000 #define AW2013_VDD_MAX_UV 3300000 #define AW2013_VI2C_MIN_UV 1800000 #define AW2013_VI2C_MAX_UV 1800000 #define MAX_RISE_TIME_MS 7 #define MAX_HOLD_TIME_MS 5 #define MAX_FALL_TIME_MS 7 #define MAX_OFF_TIME_MS 5 struct aw2013_led { struct i2c_client *client; struct led_classdev cdev; struct aw2013_platform_data *pdata; struct work_struct brightness_work; struct mutex lock; struct regulator *vdd; struct regulator *vcc; int num_leds; int id; bool poweron; }; static int aw2013_write(struct aw2013_led *led, u8 reg, u8 val) { return i2c_smbus_write_byte_data(led->client, reg, val); } static int aw2013_read(struct aw2013_led *led, u8 reg, u8 *val) { s32 ret; ret = i2c_smbus_read_byte_data(led->client, reg); if (ret < 0) return ret; *val = ret; return 0; } static int aw2013_power_on(struct aw2013_led *led, bool on) { int rc; if (on) { rc = regulator_enable(led->vdd); if (rc) { dev_err(&led->client->dev, "Regulator vdd enable failed rc=%d\n", rc); return rc; } rc = regulator_enable(led->vcc); if (rc) { dev_err(&led->client->dev, "Regulator vcc enable failed rc=%d\n", rc); goto fail_enable_reg; } led->poweron = true; } else { rc = regulator_disable(led->vdd); if (rc) { dev_err(&led->client->dev, "Regulator vdd disable failed rc=%d\n", rc); return rc; } rc = regulator_disable(led->vcc); if (rc) { dev_err(&led->client->dev, "Regulator vcc disable failed rc=%d\n", rc); goto fail_disable_reg; } led->poweron = false; } return rc; fail_enable_reg: rc = regulator_disable(led->vdd); if (rc) dev_err(&led->client->dev, "Regulator vdd disable failed rc=%d\n", rc); return rc; fail_disable_reg: rc = regulator_enable(led->vdd); if (rc) dev_err(&led->client->dev, "Regulator vdd enable failed rc=%d\n", rc); return rc; } static int aw2013_power_init(struct aw2013_led *led, bool on) { int rc; if (on) { led->vdd = regulator_get(&led->client->dev, "vdd"); if (IS_ERR(led->vdd)) { rc = PTR_ERR(led->vdd); dev_err(&led->client->dev, "Regulator get failed vdd rc=%d\n", rc); return rc; } if (regulator_count_voltages(led->vdd) > 0) { rc = regulator_set_voltage(led->vdd, AW2013_VDD_MIN_UV, AW2013_VDD_MAX_UV); if (rc) { dev_err(&led->client->dev, "Regulator set_vtg failed vdd rc=%d\n", rc); goto reg_vdd_put; } } led->vcc = regulator_get(&led->client->dev, "vcc"); if (IS_ERR(led->vcc)) { rc = PTR_ERR(led->vcc); dev_err(&led->client->dev, "Regulator get failed vcc rc=%d\n", rc); goto reg_vdd_set_vtg; } if (regulator_count_voltages(led->vcc) > 0) { rc = regulator_set_voltage(led->vcc, AW2013_VI2C_MIN_UV, AW2013_VI2C_MAX_UV); if (rc) { dev_err(&led->client->dev, "Regulator set_vtg failed vcc rc=%d\n", rc); goto reg_vcc_put; } } } else { if (regulator_count_voltages(led->vdd) > 0) regulator_set_voltage(led->vdd, 0, AW2013_VDD_MAX_UV); regulator_put(led->vdd); if (regulator_count_voltages(led->vcc) > 0) regulator_set_voltage(led->vcc, 0, AW2013_VI2C_MAX_UV); regulator_put(led->vcc); } return 0; reg_vcc_put: regulator_put(led->vcc); reg_vdd_set_vtg: if (regulator_count_voltages(led->vdd) > 0) regulator_set_voltage(led->vdd, 0, AW2013_VDD_MAX_UV); reg_vdd_put: regulator_put(led->vdd); return rc; } static void aw2013_brightness_work(struct work_struct *work) { struct aw2013_led *led = container_of(work, struct aw2013_led, brightness_work); u8 val; mutex_lock(&led->pdata->led->lock); /* enable regulators if they are disabled */ if (!led->pdata->led->poweron) { if (aw2013_power_on(led->pdata->led, true)) { dev_err(&led->pdata->led->client->dev, "power on failed"); mutex_unlock(&led->pdata->led->lock); return; } } if (led->cdev.brightness > 0) { if (led->cdev.brightness > led->cdev.max_brightness) led->cdev.brightness = led->cdev.max_brightness; aw2013_write(led, AW_REG_GLOBAL_CONTROL, AW_LED_MOUDLE_ENABLE_MASK); aw2013_write(led, AW_REG_LED_CONFIG_BASE + led->id, led->pdata->max_current); aw2013_write(led, AW_REG_LED_BRIGHTNESS_BASE + led->id, led->cdev.brightness); aw2013_read(led, AW_REG_LED_ENABLE, &val); aw2013_write(led, AW_REG_LED_ENABLE, val | (1 << led->id)); } else { aw2013_read(led, AW_REG_LED_ENABLE, &val); aw2013_write(led, AW_REG_LED_ENABLE, val & (~(1 << led->id))); } aw2013_read(led, AW_REG_LED_ENABLE, &val); /* * If value in AW_REG_LED_ENABLE is 0, it means the RGB leds are * all off. So we need to power it off. */ if (val == 0) { if (aw2013_power_on(led->pdata->led, false)) { dev_err(&led->pdata->led->client->dev, "power off failed"); mutex_unlock(&led->pdata->led->lock); return; } } mutex_unlock(&led->pdata->led->lock); } static void aw2013_led_blink_set(struct aw2013_led *led, unsigned long blinking) { u8 val; /* enable regulators if they are disabled */ if (!led->pdata->led->poweron) { if (aw2013_power_on(led->pdata->led, true)) { dev_err(&led->pdata->led->client->dev, "power on failed"); return; } } led->cdev.brightness = blinking ? led->cdev.max_brightness : 0; if (blinking > 0) { aw2013_write(led, AW_REG_GLOBAL_CONTROL, AW_LED_MOUDLE_ENABLE_MASK); aw2013_write(led, AW_REG_LED_CONFIG_BASE + led->id, AW_LED_FADE_OFF_MASK | AW_LED_FADE_ON_MASK | AW_LED_BREATHE_MODE_MASK | led->pdata->max_current); aw2013_write(led, AW_REG_LED_BRIGHTNESS_BASE + led->id, led->cdev.brightness); aw2013_write(led, AW_REG_TIMESET0_BASE + led->id * 3, led->pdata->rise_time_ms << 4 | led->pdata->hold_time_ms); aw2013_write(led, AW_REG_TIMESET1_BASE + led->id * 3, led->pdata->fall_time_ms << 4 | led->pdata->off_time_ms); aw2013_read(led, AW_REG_LED_ENABLE, &val); aw2013_write(led, AW_REG_LED_ENABLE, val | (1 << led->id)); } else { aw2013_read(led, AW_REG_LED_ENABLE, &val); aw2013_write(led, AW_REG_LED_ENABLE, val & (~(1 << led->id))); } aw2013_read(led, AW_REG_LED_ENABLE, &val); /* * If value in AW_REG_LED_ENABLE is 0, it means the RGB leds are * all off. So we need to power it off. */ if (val == 0) { if (aw2013_power_on(led->pdata->led, false)) { dev_err(&led->pdata->led->client->dev, "power off failed"); return; } } } static void aw2013_set_brightness(struct led_classdev *cdev, enum led_brightness brightness) { struct aw2013_led *led = container_of(cdev, struct aw2013_led, cdev); led->cdev.brightness = brightness; schedule_work(&led->brightness_work); } static ssize_t aw2013_store_blink(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) { unsigned long blinking; struct led_classdev *led_cdev = dev_get_drvdata(dev); struct aw2013_led *led = container_of(led_cdev, struct aw2013_led, cdev); ssize_t ret = -EINVAL; ret = kstrtoul(buf, 10, &blinking); if (ret) return ret; mutex_lock(&led->pdata->led->lock); aw2013_led_blink_set(led, blinking); mutex_unlock(&led->pdata->led->lock); return len; } static ssize_t aw2013_led_time_show(struct device *dev, struct device_attribute *attr, char *buf) { struct led_classdev *led_cdev = dev_get_drvdata(dev); struct aw2013_led *led = container_of(led_cdev, struct aw2013_led, cdev); return snprintf(buf, PAGE_SIZE, "%d %d %d %d\n", led->pdata->rise_time_ms, led->pdata->hold_time_ms, led->pdata->fall_time_ms, led->pdata->off_time_ms); } static ssize_t aw2013_led_time_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) { struct led_classdev *led_cdev = dev_get_drvdata(dev); struct aw2013_led *led = container_of(led_cdev, struct aw2013_led, cdev); int rc, rise_time_ms, hold_time_ms, fall_time_ms, off_time_ms; rc = sscanf(buf, "%d %d %d %d", &rise_time_ms, &hold_time_ms, &fall_time_ms, &off_time_ms); mutex_lock(&led->pdata->led->lock); led->pdata->rise_time_ms = (rise_time_ms > MAX_RISE_TIME_MS) ? MAX_RISE_TIME_MS : rise_time_ms; led->pdata->hold_time_ms = (hold_time_ms > MAX_HOLD_TIME_MS) ? MAX_HOLD_TIME_MS : hold_time_ms; led->pdata->fall_time_ms = (fall_time_ms > MAX_FALL_TIME_MS) ? MAX_FALL_TIME_MS : fall_time_ms; led->pdata->off_time_ms = (off_time_ms > MAX_OFF_TIME_MS) ? MAX_OFF_TIME_MS : off_time_ms; aw2013_led_blink_set(led, 1); mutex_unlock(&led->pdata->led->lock); return len; } static DEVICE_ATTR(blink, 0664, NULL, aw2013_store_blink); static DEVICE_ATTR(led_time, 0664, aw2013_led_time_show, aw2013_led_time_store); static struct attribute *aw2013_led_attributes[] = { &dev_attr_blink.attr, &dev_attr_led_time.attr, NULL, }; static struct attribute_group aw2013_led_attr_group = { .attrs = aw2013_led_attributes }; static int aw_2013_check_chipid(struct aw2013_led *led) { u8 val; aw2013_write(led, AW_REG_RESET, AW_LED_RESET_MASK); usleep(AW_LED_RESET_DELAY); aw2013_read(led, AW_REG_RESET, &val); if (val == AW2013_CHIPID) return 0; else return -EINVAL; } static int aw2013_led_err_handle(struct aw2013_led *led_array, int parsed_leds) { int i; /* * If probe fails, cannot free resource of all LEDs, only free * resources of LEDs which have allocated these resource really. */ for (i = 0; i < parsed_leds; i++) { sysfs_remove_group(&led_array[i].cdev.dev->kobj, &aw2013_led_attr_group); led_classdev_unregister(&led_array[i].cdev); cancel_work_sync(&led_array[i].brightness_work); devm_kfree(&led_array->client->dev, led_array[i].pdata); led_array[i].pdata = NULL; } return i; } static int aw2013_led_parse_child_node(struct aw2013_led *led_array, struct device_node *node) { struct aw2013_led *led; struct device_node *temp; struct aw2013_platform_data *pdata; int rc = 0, parsed_leds = 0; for_each_child_of_node(node, temp) { led = &led_array[parsed_leds]; led->client = led_array->client; pdata = devm_kzalloc(&led->client->dev, sizeof(struct aw2013_platform_data), GFP_KERNEL); if (!pdata) { dev_err(&led->client->dev, "Failed to allocate memory\n"); goto free_err; } pdata->led = led_array; led->pdata = pdata; rc = of_property_read_string(temp, "aw2013,name", &led->cdev.name); if (rc < 0) { dev_err(&led->client->dev, "Failure reading led name, rc = %d\n", rc); goto free_pdata; } rc = of_property_read_u32(temp, "aw2013,id", &led->id); if (rc < 0) { dev_err(&led->client->dev, "Failure reading id, rc = %d\n", rc); goto free_pdata; } rc = of_property_read_u32(temp, "aw2013,max-brightness", &led->cdev.max_brightness); if (rc < 0) { dev_err(&led->client->dev, "Failure reading max-brightness, rc = %d\n", rc); goto free_pdata; } rc = of_property_read_u32(temp, "aw2013,max-current", &led->pdata->max_current); if (rc < 0) { dev_err(&led->client->dev, "Failure reading max-current, rc = %d\n", rc); goto free_pdata; } rc = of_property_read_u32(temp, "aw2013,rise-time-ms", &led->pdata->rise_time_ms); if (rc < 0) { dev_err(&led->client->dev, "Failure reading rise-time-ms, rc = %d\n", rc); goto free_pdata; } rc = of_property_read_u32(temp, "aw2013,hold-time-ms", &led->pdata->hold_time_ms); if (rc < 0) { dev_err(&led->client->dev, "Failure reading hold-time-ms, rc = %d\n", rc); goto free_pdata; } rc = of_property_read_u32(temp, "aw2013,fall-time-ms", &led->pdata->fall_time_ms); if (rc < 0) { dev_err(&led->client->dev, "Failure reading fall-time-ms, rc = %d\n", rc); goto free_pdata; } rc = of_property_read_u32(temp, "aw2013,off-time-ms", &led->pdata->off_time_ms); if (rc < 0) { dev_err(&led->client->dev, "Failure reading off-time-ms, rc = %d\n", rc); goto free_pdata; } INIT_WORK(&led->brightness_work, aw2013_brightness_work); led->cdev.brightness_set = aw2013_set_brightness; rc = led_classdev_register(&led->client->dev, &led->cdev); if (rc) { dev_err(&led->client->dev, "unable to register led %d,rc=%d\n", led->id, rc); goto free_pdata; } rc = sysfs_create_group(&led->cdev.dev->kobj, &aw2013_led_attr_group); if (rc) { dev_err(&led->client->dev, "led sysfs rc: %d\n", rc); goto free_class; } parsed_leds++; } return 0; free_class: aw2013_led_err_handle(led_array, parsed_leds); led_classdev_unregister(&led_array[parsed_leds].cdev); cancel_work_sync(&led_array[parsed_leds].brightness_work); devm_kfree(&led->client->dev, led_array[parsed_leds].pdata); led_array[parsed_leds].pdata = NULL; return rc; free_pdata: aw2013_led_err_handle(led_array, parsed_leds); devm_kfree(&led->client->dev, led_array[parsed_leds].pdata); return rc; free_err: aw2013_led_err_handle(led_array, parsed_leds); return rc; } static int aw2013_led_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct aw2013_led *led_array; struct device_node *node; int ret, num_leds = 0; node = client->dev.of_node; if (node == NULL) return -EINVAL; num_leds = of_get_child_count(node); if (!num_leds) return -EINVAL; led_array = devm_kzalloc(&client->dev, (sizeof(struct aw2013_led) * num_leds), GFP_KERNEL); if (!led_array) return -ENOMEM; led_array->client = client; led_array->num_leds = num_leds; mutex_init(&led_array->lock); ret = aw_2013_check_chipid(led_array); if (ret) { dev_err(&client->dev, "Check chip id error\n"); goto free_led_arry; } ret = aw2013_led_parse_child_node(led_array, node); if (ret) { dev_err(&client->dev, "parsed node error\n"); goto free_led_arry; } i2c_set_clientdata(client, led_array); ret = aw2013_power_init(led_array, true); if (ret) { dev_err(&client->dev, "power init failed"); goto fail_parsed_node; } return 0; fail_parsed_node: aw2013_led_err_handle(led_array, num_leds); free_led_arry: mutex_destroy(&led_array->lock); devm_kfree(&client->dev, led_array); led_array = NULL; return ret; } static int aw2013_led_remove(struct i2c_client *client) { struct aw2013_led *led_array = i2c_get_clientdata(client); int i, parsed_leds = led_array->num_leds; for (i = 0; i < parsed_leds; i++) { sysfs_remove_group(&led_array[i].cdev.dev->kobj, &aw2013_led_attr_group); led_classdev_unregister(&led_array[i].cdev); cancel_work_sync(&led_array[i].brightness_work); devm_kfree(&client->dev, led_array[i].pdata); led_array[i].pdata = NULL; } mutex_destroy(&led_array->lock); devm_kfree(&client->dev, led_array); led_array = NULL; return 0; } static const struct i2c_device_id aw2013_led_id[] = { {"aw2013_led", 0}, {}, }; MODULE_DEVICE_TABLE(i2c, aw2013_led_id); static struct of_device_id aw2013_match_table[] = { { .compatible = "awinic,aw2013",}, { }, }; static struct i2c_driver aw2013_led_driver = { .probe = aw2013_led_probe, .remove = aw2013_led_remove, .driver = { .name = "aw2013_led", .owner = THIS_MODULE, .of_match_table = of_match_ptr(aw2013_match_table), }, .id_table = aw2013_led_id, }; static int __init aw2013_led_init(void) { return i2c_add_driver(&aw2013_led_driver); } module_init(aw2013_led_init); static void __exit aw2013_led_exit(void) { i2c_del_driver(&aw2013_led_driver); } module_exit(aw2013_led_exit); MODULE_DESCRIPTION("AWINIC aw2013 LED driver"); MODULE_LICENSE("GPL v2");
