^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) //
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) // Copyright (C) 2018 BayLibre SAS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) // Author: Bartosz Golaszewski <bgolaszewski@baylibre.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) //
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) // LED driver for MAXIM 77650/77651 charger/power-supply.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/leds.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/mfd/max77650.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/regmap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #define MAX77650_LED_NUM_LEDS 3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #define MAX77650_LED_A_BASE 0x40
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #define MAX77650_LED_B_BASE 0x43
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #define MAX77650_LED_BR_MASK GENMASK(4, 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #define MAX77650_LED_EN_MASK GENMASK(7, 6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #define MAX77650_LED_MAX_BRIGHTNESS MAX77650_LED_BR_MASK
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) /* Enable EN_LED_MSTR. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #define MAX77650_LED_TOP_DEFAULT BIT(0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #define MAX77650_LED_ENABLE GENMASK(7, 6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #define MAX77650_LED_DISABLE 0x00
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #define MAX77650_LED_A_DEFAULT MAX77650_LED_DISABLE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) /* 100% on duty */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #define MAX77650_LED_B_DEFAULT GENMASK(3, 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) struct max77650_led {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) struct led_classdev cdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) struct regmap *map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) unsigned int regA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) unsigned int regB;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) static struct max77650_led *max77650_to_led(struct led_classdev *cdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) return container_of(cdev, struct max77650_led, cdev);
^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 int max77650_led_brightness_set(struct led_classdev *cdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) enum led_brightness brightness)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) struct max77650_led *led = max77650_to_led(cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) int val, mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) mask = MAX77650_LED_BR_MASK | MAX77650_LED_EN_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) if (brightness == LED_OFF)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) val = MAX77650_LED_DISABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) val = MAX77650_LED_ENABLE | brightness;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) return regmap_update_bits(led->map, led->regA, mask, val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) static int max77650_led_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) struct fwnode_handle *child;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) struct max77650_led *leds, *led;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) struct device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) struct regmap *map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) int rv, num_leds;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) u32 reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) dev = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) leds = devm_kcalloc(dev, sizeof(*leds),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) MAX77650_LED_NUM_LEDS, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) if (!leds)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) map = dev_get_regmap(dev->parent, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) if (!map)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) num_leds = device_get_child_node_count(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) if (!num_leds || num_leds > MAX77650_LED_NUM_LEDS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) device_for_each_child_node(dev, child) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) struct led_init_data init_data = {};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) rv = fwnode_property_read_u32(child, "reg", ®);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) if (rv || reg >= MAX77650_LED_NUM_LEDS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) rv = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) goto err_node_put;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) led = &leds[reg];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) led->map = map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) led->regA = MAX77650_LED_A_BASE + reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) led->regB = MAX77650_LED_B_BASE + reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) led->cdev.brightness_set_blocking = max77650_led_brightness_set;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) led->cdev.max_brightness = MAX77650_LED_MAX_BRIGHTNESS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) init_data.fwnode = child;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) init_data.devicename = "max77650";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) /* for backwards compatibility if `label` is not present */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) init_data.default_label = ":";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) rv = devm_led_classdev_register_ext(dev, &led->cdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) &init_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) if (rv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) goto err_node_put;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) rv = regmap_write(map, led->regA, MAX77650_LED_A_DEFAULT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) if (rv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) goto err_node_put;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) rv = regmap_write(map, led->regB, MAX77650_LED_B_DEFAULT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) if (rv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) goto err_node_put;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) return regmap_write(map,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) MAX77650_REG_CNFG_LED_TOP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) MAX77650_LED_TOP_DEFAULT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) err_node_put:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) fwnode_handle_put(child);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) return rv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) static const struct of_device_id max77650_led_of_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) { .compatible = "maxim,max77650-led" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) MODULE_DEVICE_TABLE(of, max77650_led_of_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) static struct platform_driver max77650_led_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) .name = "max77650-led",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) .of_match_table = max77650_led_of_match,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) .probe = max77650_led_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) module_platform_driver(max77650_led_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) MODULE_DESCRIPTION("MAXIM 77650/77651 LED driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) MODULE_AUTHOR("Bartosz Golaszewski <bgolaszewski@baylibre.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) MODULE_LICENSE("GPL v2");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) MODULE_ALIAS("platform:max77650-led");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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