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