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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * LEDs driver for Dialog Semiconductor DA9030/DA90344 *5 * Copyright (C) 2008 Compulab, Ltd.6 * Mike Rapoport <mike@compulab.co.il>7 *8 * Copyright (C) 2006-2008 Marvell International Ltd.9 * Eric Miao <eric.miao@marvell.com>10 */11 12#include <linux/module.h>13#include <linux/kernel.h>14#include <linux/platform_device.h>15#include <linux/leds.h>16#include <linux/mfd/da903x.h>17#include <linux/slab.h>18 19#define DA9030_LED1_CONTROL 0x2020#define DA9030_LED2_CONTROL 0x2121#define DA9030_LED3_CONTROL 0x2222#define DA9030_LED4_CONTROL 0x2323#define DA9030_LEDPC_CONTROL 0x2424#define DA9030_MISC_CONTROL_A 0x26 /* Vibrator Control */25 26#define DA9034_LED1_CONTROL 0x3527#define DA9034_LED2_CONTROL 0x3628#define DA9034_VIBRA 0x4029 30struct da903x_led {31 struct led_classdev cdev;32 struct device *master;33 int id;34 int flags;35};36 37#define DA9030_LED_OFFSET(id) ((id) - DA9030_ID_LED_1)38#define DA9034_LED_OFFSET(id) ((id) - DA9034_ID_LED_1)39 40static int da903x_led_set(struct led_classdev *led_cdev,41 enum led_brightness value)42{43 struct da903x_led *led =44 container_of(led_cdev, struct da903x_led, cdev);45 uint8_t val;46 int offset, ret = -EINVAL;47 48 switch (led->id) {49 case DA9030_ID_LED_1:50 case DA9030_ID_LED_2:51 case DA9030_ID_LED_3:52 case DA9030_ID_LED_4:53 case DA9030_ID_LED_PC:54 offset = DA9030_LED_OFFSET(led->id);55 val = led->flags & ~0x87;56 val |= value ? 0x80 : 0; /* EN bit */57 val |= (0x7 - (value >> 5)) & 0x7; /* PWM<2:0> */58 ret = da903x_write(led->master, DA9030_LED1_CONTROL + offset,59 val);60 break;61 case DA9030_ID_VIBRA:62 val = led->flags & ~0x80;63 val |= value ? 0x80 : 0; /* EN bit */64 ret = da903x_write(led->master, DA9030_MISC_CONTROL_A, val);65 break;66 case DA9034_ID_LED_1:67 case DA9034_ID_LED_2:68 offset = DA9034_LED_OFFSET(led->id);69 val = (value * 0x5f / LED_FULL) & 0x7f;70 val |= (led->flags & DA9034_LED_RAMP) ? 0x80 : 0;71 ret = da903x_write(led->master, DA9034_LED1_CONTROL + offset,72 val);73 break;74 case DA9034_ID_VIBRA:75 val = value & 0xfe;76 ret = da903x_write(led->master, DA9034_VIBRA, val);77 break;78 }79 80 return ret;81}82 83static int da903x_led_probe(struct platform_device *pdev)84{85 struct led_info *pdata = dev_get_platdata(&pdev->dev);86 struct da903x_led *led;87 int id, ret;88 89 if (pdata == NULL)90 return 0;91 92 id = pdev->id;93 94 if (!((id >= DA9030_ID_LED_1 && id <= DA9030_ID_VIBRA) ||95 (id >= DA9034_ID_LED_1 && id <= DA9034_ID_VIBRA))) {96 dev_err(&pdev->dev, "invalid LED ID (%d) specified\n", id);97 return -EINVAL;98 }99 100 led = devm_kzalloc(&pdev->dev, sizeof(struct da903x_led), GFP_KERNEL);101 if (!led)102 return -ENOMEM;103 104 led->cdev.name = pdata->name;105 led->cdev.default_trigger = pdata->default_trigger;106 led->cdev.brightness_set_blocking = da903x_led_set;107 led->cdev.brightness = LED_OFF;108 109 led->id = id;110 led->flags = pdata->flags;111 led->master = pdev->dev.parent;112 113 ret = led_classdev_register(led->master, &led->cdev);114 if (ret) {115 dev_err(&pdev->dev, "failed to register LED %d\n", id);116 return ret;117 }118 119 platform_set_drvdata(pdev, led);120 121 return 0;122}123 124static void da903x_led_remove(struct platform_device *pdev)125{126 struct da903x_led *led = platform_get_drvdata(pdev);127 128 led_classdev_unregister(&led->cdev);129}130 131static struct platform_driver da903x_led_driver = {132 .driver = {133 .name = "da903x-led",134 },135 .probe = da903x_led_probe,136 .remove_new = da903x_led_remove,137};138 139module_platform_driver(da903x_led_driver);140 141MODULE_DESCRIPTION("LEDs driver for Dialog Semiconductor DA9030/DA9034");142MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>");143MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");144MODULE_LICENSE("GPL");145MODULE_ALIAS("platform:da903x-led");146