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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * LEDs driver for Analog Devices ADP5520/ADP5501 MFD PMICs4 *5 * Copyright 2009 Analog Devices Inc.6 *7 * Loosely derived from leds-da903x:8 * Copyright (C) 2008 Compulab, Ltd.9 * Mike Rapoport <mike@compulab.co.il>10 *11 * Copyright (C) 2006-2008 Marvell International Ltd.12 * Eric Miao <eric.miao@marvell.com>13 */14 15#include <linux/module.h>16#include <linux/kernel.h>17#include <linux/platform_device.h>18#include <linux/leds.h>19#include <linux/mfd/adp5520.h>20#include <linux/slab.h>21 22struct adp5520_led {23 struct led_classdev cdev;24 struct device *master;25 int id;26 int flags;27};28 29static int adp5520_led_set(struct led_classdev *led_cdev,30 enum led_brightness value)31{32 struct adp5520_led *led;33 34 led = container_of(led_cdev, struct adp5520_led, cdev);35 return adp5520_write(led->master, ADP5520_LED1_CURRENT + led->id - 1,36 value >> 2);37}38 39static int adp5520_led_setup(struct adp5520_led *led)40{41 struct device *dev = led->master;42 int flags = led->flags;43 int ret = 0;44 45 switch (led->id) {46 case FLAG_ID_ADP5520_LED1_ADP5501_LED0:47 ret |= adp5520_set_bits(dev, ADP5520_LED_TIME,48 (flags >> ADP5520_FLAG_OFFT_SHIFT) &49 ADP5520_FLAG_OFFT_MASK);50 ret |= adp5520_set_bits(dev, ADP5520_LED_CONTROL,51 ADP5520_LED1_EN);52 break;53 case FLAG_ID_ADP5520_LED2_ADP5501_LED1:54 ret |= adp5520_set_bits(dev, ADP5520_LED_TIME,55 ((flags >> ADP5520_FLAG_OFFT_SHIFT) &56 ADP5520_FLAG_OFFT_MASK) << 2);57 ret |= adp5520_clr_bits(dev, ADP5520_LED_CONTROL,58 ADP5520_R3_MODE);59 ret |= adp5520_set_bits(dev, ADP5520_LED_CONTROL,60 ADP5520_LED2_EN);61 break;62 case FLAG_ID_ADP5520_LED3_ADP5501_LED2:63 ret |= adp5520_set_bits(dev, ADP5520_LED_TIME,64 ((flags >> ADP5520_FLAG_OFFT_SHIFT) &65 ADP5520_FLAG_OFFT_MASK) << 4);66 ret |= adp5520_clr_bits(dev, ADP5520_LED_CONTROL,67 ADP5520_C3_MODE);68 ret |= adp5520_set_bits(dev, ADP5520_LED_CONTROL,69 ADP5520_LED3_EN);70 break;71 }72 73 return ret;74}75 76static int adp5520_led_prepare(struct platform_device *pdev)77{78 struct adp5520_leds_platform_data *pdata = dev_get_platdata(&pdev->dev);79 struct device *dev = pdev->dev.parent;80 int ret = 0;81 82 ret |= adp5520_write(dev, ADP5520_LED1_CURRENT, 0);83 ret |= adp5520_write(dev, ADP5520_LED2_CURRENT, 0);84 ret |= adp5520_write(dev, ADP5520_LED3_CURRENT, 0);85 ret |= adp5520_write(dev, ADP5520_LED_TIME, pdata->led_on_time << 6);86 ret |= adp5520_write(dev, ADP5520_LED_FADE, FADE_VAL(pdata->fade_in,87 pdata->fade_out));88 89 return ret;90}91 92static int adp5520_led_probe(struct platform_device *pdev)93{94 struct adp5520_leds_platform_data *pdata = dev_get_platdata(&pdev->dev);95 struct adp5520_led *led, *led_dat;96 struct led_info *cur_led;97 int ret, i;98 99 if (pdata == NULL) {100 dev_err(&pdev->dev, "missing platform data\n");101 return -ENODEV;102 }103 104 if (pdata->num_leds > ADP5520_01_MAXLEDS) {105 dev_err(&pdev->dev, "can't handle more than %d LEDS\n",106 ADP5520_01_MAXLEDS);107 return -EFAULT;108 }109 110 led = devm_kcalloc(&pdev->dev, pdata->num_leds, sizeof(*led),111 GFP_KERNEL);112 if (!led)113 return -ENOMEM;114 115 ret = adp5520_led_prepare(pdev);116 if (ret) {117 dev_err(&pdev->dev, "failed to write\n");118 return ret;119 }120 121 for (i = 0; i < pdata->num_leds; ++i) {122 cur_led = &pdata->leds[i];123 led_dat = &led[i];124 125 led_dat->cdev.name = cur_led->name;126 led_dat->cdev.default_trigger = cur_led->default_trigger;127 led_dat->cdev.brightness_set_blocking = adp5520_led_set;128 led_dat->cdev.brightness = LED_OFF;129 130 if (cur_led->flags & ADP5520_FLAG_LED_MASK)131 led_dat->flags = cur_led->flags;132 else133 led_dat->flags = i + 1;134 135 led_dat->id = led_dat->flags & ADP5520_FLAG_LED_MASK;136 137 led_dat->master = pdev->dev.parent;138 139 ret = led_classdev_register(led_dat->master, &led_dat->cdev);140 if (ret) {141 dev_err(&pdev->dev, "failed to register LED %d\n",142 led_dat->id);143 goto err;144 }145 146 ret = adp5520_led_setup(led_dat);147 if (ret) {148 dev_err(&pdev->dev, "failed to write\n");149 i++;150 goto err;151 }152 }153 154 platform_set_drvdata(pdev, led);155 return 0;156 157err:158 if (i > 0) {159 for (i = i - 1; i >= 0; i--)160 led_classdev_unregister(&led[i].cdev);161 }162 163 return ret;164}165 166static void adp5520_led_remove(struct platform_device *pdev)167{168 struct adp5520_leds_platform_data *pdata = dev_get_platdata(&pdev->dev);169 struct adp5520_led *led;170 int i;171 172 led = platform_get_drvdata(pdev);173 174 adp5520_clr_bits(led->master, ADP5520_LED_CONTROL,175 ADP5520_LED1_EN | ADP5520_LED2_EN | ADP5520_LED3_EN);176 177 for (i = 0; i < pdata->num_leds; i++) {178 led_classdev_unregister(&led[i].cdev);179 }180}181 182static struct platform_driver adp5520_led_driver = {183 .driver = {184 .name = "adp5520-led",185 },186 .probe = adp5520_led_probe,187 .remove_new = adp5520_led_remove,188};189 190module_platform_driver(adp5520_led_driver);191 192MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");193MODULE_DESCRIPTION("LEDS ADP5520(01) Driver");194MODULE_LICENSE("GPL");195MODULE_ALIAS("platform:adp5520-led");196