^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (c) 2017 Sebastian Reichel <sre@kernel.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <linux/leds.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/mfd/motorola-cpcap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/mutex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/of_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/regmap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/regulator/consumer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #define CPCAP_LED_NO_CURRENT 0x0001
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) struct cpcap_led_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) u16 reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) u16 mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) u16 limit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) u16 init_mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) u16 init_val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) static const struct cpcap_led_info cpcap_led_red = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) .reg = CPCAP_REG_REDC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) .mask = 0x03FF,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) .limit = 31,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) static const struct cpcap_led_info cpcap_led_green = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) .reg = CPCAP_REG_GREENC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) .mask = 0x03FF,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) .limit = 31,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) static const struct cpcap_led_info cpcap_led_blue = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) .reg = CPCAP_REG_BLUEC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) .mask = 0x03FF,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) .limit = 31,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) /* aux display light */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) static const struct cpcap_led_info cpcap_led_adl = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) .reg = CPCAP_REG_ADLC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) .mask = 0x000F,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) .limit = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) .init_mask = 0x7FFF,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) .init_val = 0x5FF0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) /* camera privacy led */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) static const struct cpcap_led_info cpcap_led_cp = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) .reg = CPCAP_REG_CLEDC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) .mask = 0x0007,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) .limit = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) .init_mask = 0x03FF,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) .init_val = 0x0008,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) struct cpcap_led {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) struct led_classdev led;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) const struct cpcap_led_info *info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) struct device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) struct regmap *regmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) struct mutex update_lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) struct regulator *vdd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) bool powered;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) u32 current_limit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) static u16 cpcap_led_val(u8 current_limit, u8 duty_cycle)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) current_limit &= 0x1f; /* 5 bit */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) duty_cycle &= 0x0f; /* 4 bit */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) return current_limit << 4 | duty_cycle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) static int cpcap_led_set_power(struct cpcap_led *led, bool status)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) if (status == led->powered)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) if (status)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) err = regulator_enable(led->vdd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) err = regulator_disable(led->vdd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) dev_err(led->dev, "regulator failure: %d", err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) led->powered = status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) static int cpcap_led_set(struct led_classdev *ledc, enum led_brightness value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) struct cpcap_led *led = container_of(ledc, struct cpcap_led, led);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) int brightness;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) mutex_lock(&led->update_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) if (value > LED_OFF) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) err = cpcap_led_set_power(led, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) if (value == LED_OFF) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) /* Avoid HW issue by turning off current before duty cycle */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) err = regmap_update_bits(led->regmap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) led->info->reg, led->info->mask, CPCAP_LED_NO_CURRENT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) dev_err(led->dev, "regmap failed: %d", err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) brightness = cpcap_led_val(value, LED_OFF);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) brightness = cpcap_led_val(value, LED_ON);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) err = regmap_update_bits(led->regmap, led->info->reg, led->info->mask,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) brightness);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) dev_err(led->dev, "regmap failed: %d", err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) if (value == LED_OFF) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) err = cpcap_led_set_power(led, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) exit:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) mutex_unlock(&led->update_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) static const struct of_device_id cpcap_led_of_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) { .compatible = "motorola,cpcap-led-red", .data = &cpcap_led_red },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) { .compatible = "motorola,cpcap-led-green", .data = &cpcap_led_green },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) { .compatible = "motorola,cpcap-led-blue", .data = &cpcap_led_blue },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) { .compatible = "motorola,cpcap-led-adl", .data = &cpcap_led_adl },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) { .compatible = "motorola,cpcap-led-cp", .data = &cpcap_led_cp },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) {},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) MODULE_DEVICE_TABLE(of, cpcap_led_of_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) static int cpcap_led_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) struct cpcap_led *led;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) led = devm_kzalloc(&pdev->dev, sizeof(*led), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) if (!led)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) platform_set_drvdata(pdev, led);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) led->info = device_get_match_data(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) led->dev = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) if (led->info->reg == 0x0000) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) dev_err(led->dev, "Unsupported LED");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) led->regmap = dev_get_regmap(pdev->dev.parent, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) if (!led->regmap)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) led->vdd = devm_regulator_get(&pdev->dev, "vdd");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) if (IS_ERR(led->vdd)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) err = PTR_ERR(led->vdd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) dev_err(led->dev, "Couldn't get regulator: %d", err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) err = device_property_read_string(&pdev->dev, "label", &led->led.name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) dev_err(led->dev, "Couldn't read LED label: %d", err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) if (led->info->init_mask) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) err = regmap_update_bits(led->regmap, led->info->reg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) led->info->init_mask, led->info->init_val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) dev_err(led->dev, "regmap failed: %d", err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) mutex_init(&led->update_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) led->led.max_brightness = led->info->limit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) led->led.brightness_set_blocking = cpcap_led_set;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) err = devm_led_classdev_register(&pdev->dev, &led->led);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) dev_err(led->dev, "Couldn't register LED: %d", err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) static struct platform_driver cpcap_led_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) .probe = cpcap_led_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) .name = "cpcap-led",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) .of_match_table = cpcap_led_of_match,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) module_platform_driver(cpcap_led_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) MODULE_DESCRIPTION("CPCAP LED driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) MODULE_AUTHOR("Sebastian Reichel <sre@kernel.org>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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