| /* |
| * LEDs driver for Dialog Semiconductor DA9030/DA9034 |
| * |
| * Copyright (C) 2008 Compulab, Ltd. |
| * Mike Rapoport <mike@compulab.co.il> |
| * |
| * Copyright (C) 2006-2008 Marvell International Ltd. |
| * Eric Miao <eric.miao@marvell.com> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/kernel.h> |
| #include <linux/init.h> |
| #include <linux/platform_device.h> |
| #include <linux/leds.h> |
| #include <linux/workqueue.h> |
| #include <linux/mfd/da903x.h> |
| #include <linux/slab.h> |
| |
| #define DA9030_LED1_CONTROL 0x20 |
| #define DA9030_LED2_CONTROL 0x21 |
| #define DA9030_LED3_CONTROL 0x22 |
| #define DA9030_LED4_CONTROL 0x23 |
| #define DA9030_LEDPC_CONTROL 0x24 |
| #define DA9030_MISC_CONTROL_A 0x26 /* Vibrator Control */ |
| |
| #define DA9034_LED1_CONTROL 0x35 |
| #define DA9034_LED2_CONTROL 0x36 |
| #define DA9034_VIBRA 0x40 |
| |
| struct da903x_led { |
| struct led_classdev cdev; |
| struct work_struct work; |
| struct device *master; |
| enum led_brightness new_brightness; |
| int id; |
| int flags; |
| }; |
| |
| #define DA9030_LED_OFFSET(id) ((id) - DA9030_ID_LED_1) |
| #define DA9034_LED_OFFSET(id) ((id) - DA9034_ID_LED_1) |
| |
| static void da903x_led_work(struct work_struct *work) |
| { |
| struct da903x_led *led = container_of(work, struct da903x_led, work); |
| uint8_t val; |
| int offset; |
| |
| switch (led->id) { |
| case DA9030_ID_LED_1: |
| case DA9030_ID_LED_2: |
| case DA9030_ID_LED_3: |
| case DA9030_ID_LED_4: |
| case DA9030_ID_LED_PC: |
| offset = DA9030_LED_OFFSET(led->id); |
| val = led->flags & ~0x87; |
| val |= (led->new_brightness) ? 0x80 : 0; /* EN bit */ |
| val |= (0x7 - (led->new_brightness >> 5)) & 0x7; /* PWM<2:0> */ |
| da903x_write(led->master, DA9030_LED1_CONTROL + offset, val); |
| break; |
| case DA9030_ID_VIBRA: |
| val = led->flags & ~0x80; |
| val |= (led->new_brightness) ? 0x80 : 0; /* EN bit */ |
| da903x_write(led->master, DA9030_MISC_CONTROL_A, val); |
| break; |
| case DA9034_ID_LED_1: |
| case DA9034_ID_LED_2: |
| offset = DA9034_LED_OFFSET(led->id); |
| val = (led->new_brightness * 0x5f / LED_FULL) & 0x7f; |
| val |= (led->flags & DA9034_LED_RAMP) ? 0x80 : 0; |
| da903x_write(led->master, DA9034_LED1_CONTROL + offset, val); |
| break; |
| case DA9034_ID_VIBRA: |
| val = led->new_brightness & 0xfe; |
| da903x_write(led->master, DA9034_VIBRA, val); |
| break; |
| } |
| } |
| |
| static void da903x_led_set(struct led_classdev *led_cdev, |
| enum led_brightness value) |
| { |
| struct da903x_led *led; |
| |
| led = container_of(led_cdev, struct da903x_led, cdev); |
| led->new_brightness = value; |
| schedule_work(&led->work); |
| } |
| |
| static int da903x_led_probe(struct platform_device *pdev) |
| { |
| struct led_info *pdata = pdev->dev.platform_data; |
| struct da903x_led *led; |
| int id, ret; |
| |
| if (pdata == NULL) |
| return 0; |
| |
| id = pdev->id; |
| |
| if (!((id >= DA9030_ID_LED_1 && id <= DA9030_ID_VIBRA) || |
| (id >= DA9034_ID_LED_1 && id <= DA9034_ID_VIBRA))) { |
| dev_err(&pdev->dev, "invalid LED ID (%d) specified\n", id); |
| return -EINVAL; |
| } |
| |
| led = devm_kzalloc(&pdev->dev, sizeof(struct da903x_led), GFP_KERNEL); |
| if (led == NULL) { |
| dev_err(&pdev->dev, "failed to alloc memory for LED%d\n", id); |
| return -ENOMEM; |
| } |
| |
| led->cdev.name = pdata->name; |
| led->cdev.default_trigger = pdata->default_trigger; |
| led->cdev.brightness_set = da903x_led_set; |
| led->cdev.brightness = LED_OFF; |
| |
| led->id = id; |
| led->flags = pdata->flags; |
| led->master = pdev->dev.parent; |
| led->new_brightness = LED_OFF; |
| |
| INIT_WORK(&led->work, da903x_led_work); |
| |
| ret = led_classdev_register(led->master, &led->cdev); |
| if (ret) { |
| dev_err(&pdev->dev, "failed to register LED %d\n", id); |
| return ret; |
| } |
| |
| platform_set_drvdata(pdev, led); |
| return 0; |
| } |
| |
| static int da903x_led_remove(struct platform_device *pdev) |
| { |
| struct da903x_led *led = platform_get_drvdata(pdev); |
| |
| led_classdev_unregister(&led->cdev); |
| return 0; |
| } |
| |
| static struct platform_driver da903x_led_driver = { |
| .driver = { |
| .name = "da903x-led", |
| .owner = THIS_MODULE, |
| }, |
| .probe = da903x_led_probe, |
| .remove = da903x_led_remove, |
| }; |
| |
| module_platform_driver(da903x_led_driver); |
| |
| MODULE_DESCRIPTION("LEDs driver for Dialog Semiconductor DA9030/DA9034"); |
| MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>" |
| "Mike Rapoport <mike@compulab.co.il>"); |
| MODULE_LICENSE("GPL"); |
| MODULE_ALIAS("platform:da903x-led"); |