^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * leds-max8997.c - LED class driver for MAX8997 LEDs.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2011 Samsung Electronics
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Donggeun Kim <dg77.kim@samsung.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/leds.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/mfd/max8997.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/mfd/max8997-private.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #define MAX8997_LED_FLASH_SHIFT 3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #define MAX8997_LED_FLASH_CUR_MASK 0xf8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #define MAX8997_LED_MOVIE_SHIFT 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #define MAX8997_LED_MOVIE_CUR_MASK 0xf0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #define MAX8997_LED_FLASH_MAX_BRIGHTNESS 0x1f
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #define MAX8997_LED_MOVIE_MAX_BRIGHTNESS 0xf
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #define MAX8997_LED_NONE_MAX_BRIGHTNESS 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #define MAX8997_LED0_FLASH_MASK 0x1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #define MAX8997_LED0_FLASH_PIN_MASK 0x5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #define MAX8997_LED0_MOVIE_MASK 0x8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #define MAX8997_LED0_MOVIE_PIN_MASK 0x28
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #define MAX8997_LED1_FLASH_MASK 0x2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #define MAX8997_LED1_FLASH_PIN_MASK 0x6
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #define MAX8997_LED1_MOVIE_MASK 0x10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #define MAX8997_LED1_MOVIE_PIN_MASK 0x30
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #define MAX8997_LED_BOOST_ENABLE_MASK (1 << 6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) struct max8997_led {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) struct max8997_dev *iodev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) struct led_classdev cdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) bool enabled;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) int id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) enum max8997_led_mode led_mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) struct mutex mutex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) static void max8997_led_set_mode(struct max8997_led *led,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) enum max8997_led_mode mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) struct i2c_client *client = led->iodev->i2c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) u8 mask = 0, val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) switch (mode) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) case MAX8997_FLASH_MODE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) mask = MAX8997_LED1_FLASH_MASK | MAX8997_LED0_FLASH_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) val = led->id ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) MAX8997_LED1_FLASH_MASK : MAX8997_LED0_FLASH_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) led->cdev.max_brightness = MAX8997_LED_FLASH_MAX_BRIGHTNESS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) case MAX8997_MOVIE_MODE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) mask = MAX8997_LED1_MOVIE_MASK | MAX8997_LED0_MOVIE_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) val = led->id ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) MAX8997_LED1_MOVIE_MASK : MAX8997_LED0_MOVIE_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) led->cdev.max_brightness = MAX8997_LED_MOVIE_MAX_BRIGHTNESS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) case MAX8997_FLASH_PIN_CONTROL_MODE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) mask = MAX8997_LED1_FLASH_PIN_MASK |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) MAX8997_LED0_FLASH_PIN_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) val = led->id ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) MAX8997_LED1_FLASH_PIN_MASK : MAX8997_LED0_FLASH_PIN_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) led->cdev.max_brightness = MAX8997_LED_FLASH_MAX_BRIGHTNESS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) case MAX8997_MOVIE_PIN_CONTROL_MODE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) mask = MAX8997_LED1_MOVIE_PIN_MASK |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) MAX8997_LED0_MOVIE_PIN_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) val = led->id ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) MAX8997_LED1_MOVIE_PIN_MASK : MAX8997_LED0_MOVIE_PIN_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) led->cdev.max_brightness = MAX8997_LED_MOVIE_MAX_BRIGHTNESS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) led->cdev.max_brightness = MAX8997_LED_NONE_MAX_BRIGHTNESS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) if (mask) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) ret = max8997_update_reg(client, MAX8997_REG_LEN_CNTL, val,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) dev_err(led->iodev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) "failed to update register(%d)\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) led->led_mode = mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) static void max8997_led_enable(struct max8997_led *led, bool enable)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) struct i2c_client *client = led->iodev->i2c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) u8 val = 0, mask = MAX8997_LED_BOOST_ENABLE_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) if (led->enabled == enable)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) val = enable ? MAX8997_LED_BOOST_ENABLE_MASK : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) ret = max8997_update_reg(client, MAX8997_REG_BOOST_CNTL, val, mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) dev_err(led->iodev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) "failed to update register(%d)\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) led->enabled = enable;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) static void max8997_led_set_current(struct max8997_led *led,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) enum led_brightness value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) struct i2c_client *client = led->iodev->i2c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) u8 val = 0, mask = 0, reg = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) switch (led->led_mode) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) case MAX8997_FLASH_MODE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) case MAX8997_FLASH_PIN_CONTROL_MODE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) val = value << MAX8997_LED_FLASH_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) mask = MAX8997_LED_FLASH_CUR_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) reg = led->id ? MAX8997_REG_FLASH2_CUR : MAX8997_REG_FLASH1_CUR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) case MAX8997_MOVIE_MODE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) case MAX8997_MOVIE_PIN_CONTROL_MODE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) val = value << MAX8997_LED_MOVIE_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) mask = MAX8997_LED_MOVIE_CUR_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) reg = MAX8997_REG_MOVIE_CUR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) if (mask) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) ret = max8997_update_reg(client, reg, val, mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) dev_err(led->iodev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) "failed to update register(%d)\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) static void max8997_led_brightness_set(struct led_classdev *led_cdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) enum led_brightness value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) struct max8997_led *led =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) container_of(led_cdev, struct max8997_led, cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) if (value) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) max8997_led_set_current(led, value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) max8997_led_enable(led, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) max8997_led_set_current(led, value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) max8997_led_enable(led, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) static ssize_t max8997_led_show_mode(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) struct device_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) struct led_classdev *led_cdev = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) struct max8997_led *led =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) container_of(led_cdev, struct max8997_led, cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) ssize_t ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) mutex_lock(&led->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) switch (led->led_mode) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) case MAX8997_FLASH_MODE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) ret += sprintf(buf, "FLASH\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) case MAX8997_MOVIE_MODE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) ret += sprintf(buf, "MOVIE\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) case MAX8997_FLASH_PIN_CONTROL_MODE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) ret += sprintf(buf, "FLASH_PIN_CONTROL\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) case MAX8997_MOVIE_PIN_CONTROL_MODE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) ret += sprintf(buf, "MOVIE_PIN_CONTROL\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) ret += sprintf(buf, "NONE\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) mutex_unlock(&led->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) static ssize_t max8997_led_store_mode(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) struct device_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) const char *buf, size_t size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) struct led_classdev *led_cdev = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) struct max8997_led *led =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) container_of(led_cdev, struct max8997_led, cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) enum max8997_led_mode mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) mutex_lock(&led->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) if (!strncmp(buf, "FLASH_PIN_CONTROL", 17))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) mode = MAX8997_FLASH_PIN_CONTROL_MODE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) else if (!strncmp(buf, "MOVIE_PIN_CONTROL", 17))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) mode = MAX8997_MOVIE_PIN_CONTROL_MODE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) else if (!strncmp(buf, "FLASH", 5))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) mode = MAX8997_FLASH_MODE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) else if (!strncmp(buf, "MOVIE", 5))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) mode = MAX8997_MOVIE_MODE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) mode = MAX8997_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) max8997_led_set_mode(led, mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) mutex_unlock(&led->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) return size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) static DEVICE_ATTR(mode, 0644, max8997_led_show_mode, max8997_led_store_mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) static struct attribute *max8997_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) &dev_attr_mode.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) ATTRIBUTE_GROUPS(max8997);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) static int max8997_led_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) struct max8997_dev *iodev = dev_get_drvdata(pdev->dev.parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) struct max8997_platform_data *pdata = dev_get_platdata(iodev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) struct max8997_led *led;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) char name[20];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) if (pdata == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) dev_err(&pdev->dev, "no platform data\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) led = devm_kzalloc(&pdev->dev, sizeof(*led), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) if (led == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) led->id = pdev->id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) snprintf(name, sizeof(name), "max8997-led%d", pdev->id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) led->cdev.name = name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) led->cdev.brightness_set = max8997_led_brightness_set;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) led->cdev.flags |= LED_CORE_SUSPENDRESUME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) led->cdev.brightness = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) led->cdev.groups = max8997_groups;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) led->iodev = iodev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) /* initialize mode and brightness according to platform_data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) if (pdata->led_pdata) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) u8 mode = 0, brightness = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) mode = pdata->led_pdata->mode[led->id];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) brightness = pdata->led_pdata->brightness[led->id];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) max8997_led_set_mode(led, mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) if (brightness > led->cdev.max_brightness)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) brightness = led->cdev.max_brightness;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) max8997_led_set_current(led, brightness);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) led->cdev.brightness = brightness;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) max8997_led_set_mode(led, MAX8997_NONE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) max8997_led_set_current(led, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) mutex_init(&led->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) ret = devm_led_classdev_register(&pdev->dev, &led->cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) static struct platform_driver max8997_led_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) .name = "max8997-led",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) .probe = max8997_led_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) module_platform_driver(max8997_led_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) MODULE_AUTHOR("Donggeun Kim <dg77.kim@samsung.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) MODULE_DESCRIPTION("MAX8997 LED driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) MODULE_ALIAS("platform:max8997-led");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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