^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) // Driver for Panasonic AN30259A 3-channel LED driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) //
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) // Copyright (c) 2018 Simon Shields <simon@lineageos.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) //
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) // Datasheet:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) // https://www.alliedelec.com/m/d/a9d2b3ee87c2d1a535a41dd747b1c247.pdf
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/leds.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/mutex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/regmap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #define AN30259A_MAX_LEDS 3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #define AN30259A_REG_SRESET 0x00
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #define AN30259A_LED_SRESET BIT(0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) /* LED power registers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #define AN30259A_REG_LED_ON 0x01
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #define AN30259A_LED_EN(x) BIT((x) - 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #define AN30259A_LED_SLOPE(x) BIT(((x) - 1) + 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #define AN30259A_REG_LEDCC(x) (0x03 + ((x) - 1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) /* slope control registers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #define AN30259A_REG_SLOPE(x) (0x06 + ((x) - 1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #define AN30259A_LED_SLOPETIME1(x) (x)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #define AN30259A_LED_SLOPETIME2(x) ((x) << 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #define AN30259A_REG_LEDCNT1(x) (0x09 + (4 * ((x) - 1)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #define AN30259A_LED_DUTYMAX(x) ((x) << 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #define AN30259A_LED_DUTYMID(x) (x)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #define AN30259A_REG_LEDCNT2(x) (0x0A + (4 * ((x) - 1)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #define AN30259A_LED_DELAY(x) ((x) << 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #define AN30259A_LED_DUTYMIN(x) (x)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) /* detention time control (length of each slope step) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #define AN30259A_REG_LEDCNT3(x) (0x0B + (4 * ((x) - 1)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #define AN30259A_LED_DT1(x) (x)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #define AN30259A_LED_DT2(x) ((x) << 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) #define AN30259A_REG_LEDCNT4(x) (0x0C + (4 * ((x) - 1)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #define AN30259A_LED_DT3(x) (x)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) #define AN30259A_LED_DT4(x) ((x) << 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #define AN30259A_REG_MAX 0x14
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) #define AN30259A_BLINK_MAX_TIME 7500 /* ms */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) #define AN30259A_SLOPE_RESOLUTION 500 /* ms */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) #define AN30259A_NAME "an30259a"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) #define STATE_OFF 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) #define STATE_KEEP 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) #define STATE_ON 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) struct an30259a;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) struct an30259a_led {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) struct an30259a *chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) struct fwnode_handle *fwnode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) struct led_classdev cdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) u32 num;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) u32 default_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) bool sloping;
^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) struct an30259a {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) struct mutex mutex; /* held when writing to registers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) struct i2c_client *client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) struct an30259a_led leds[AN30259A_MAX_LEDS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) struct regmap *regmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) int num_leds;
^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 an30259a_brightness_set(struct led_classdev *cdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) enum led_brightness brightness)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) struct an30259a_led *led;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) unsigned int led_on;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) led = container_of(cdev, struct an30259a_led, cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) mutex_lock(&led->chip->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) ret = regmap_read(led->chip->regmap, AN30259A_REG_LED_ON, &led_on);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) switch (brightness) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) case LED_OFF:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) led_on &= ~AN30259A_LED_EN(led->num);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) led_on &= ~AN30259A_LED_SLOPE(led->num);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) led->sloping = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) led_on |= AN30259A_LED_EN(led->num);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) if (led->sloping)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) led_on |= AN30259A_LED_SLOPE(led->num);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) ret = regmap_write(led->chip->regmap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) AN30259A_REG_LEDCNT1(led->num),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) AN30259A_LED_DUTYMAX(0xf) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) AN30259A_LED_DUTYMID(0xf));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) ret = regmap_write(led->chip->regmap, AN30259A_REG_LED_ON, led_on);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) ret = regmap_write(led->chip->regmap, AN30259A_REG_LEDCC(led->num),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) brightness);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) error:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) mutex_unlock(&led->chip->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) static int an30259a_blink_set(struct led_classdev *cdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) unsigned long *delay_off, unsigned long *delay_on)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) struct an30259a_led *led;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) int ret, num;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) unsigned int led_on;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) unsigned long off = *delay_off, on = *delay_on;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) led = container_of(cdev, struct an30259a_led, cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) mutex_lock(&led->chip->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) num = led->num;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) /* slope time can only be a multiple of 500ms. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) if (off % AN30259A_SLOPE_RESOLUTION || on % AN30259A_SLOPE_RESOLUTION) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) /* up to a maximum of 7500ms. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) if (off > AN30259A_BLINK_MAX_TIME || on > AN30259A_BLINK_MAX_TIME) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) /* if no blink specified, default to 1 Hz. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) if (!off && !on) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) *delay_off = off = 500;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) *delay_on = on = 500;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) /* convert into values the HW will understand. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) off /= AN30259A_SLOPE_RESOLUTION;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) on /= AN30259A_SLOPE_RESOLUTION;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) /* duty min should be zero (=off), delay should be zero. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) ret = regmap_write(led->chip->regmap, AN30259A_REG_LEDCNT2(num),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) AN30259A_LED_DELAY(0) | AN30259A_LED_DUTYMIN(0));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) /* reset detention time (no "breathing" effect). */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) ret = regmap_write(led->chip->regmap, AN30259A_REG_LEDCNT3(num),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) AN30259A_LED_DT1(0) | AN30259A_LED_DT2(0));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) ret = regmap_write(led->chip->regmap, AN30259A_REG_LEDCNT4(num),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) AN30259A_LED_DT3(0) | AN30259A_LED_DT4(0));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) /* slope time controls on/off cycle length. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) ret = regmap_write(led->chip->regmap, AN30259A_REG_SLOPE(num),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) AN30259A_LED_SLOPETIME1(off) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) AN30259A_LED_SLOPETIME2(on));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) /* Finally, enable slope mode. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) ret = regmap_read(led->chip->regmap, AN30259A_REG_LED_ON, &led_on);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) led_on |= AN30259A_LED_SLOPE(num) | AN30259A_LED_EN(led->num);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) ret = regmap_write(led->chip->regmap, AN30259A_REG_LED_ON, led_on);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) if (!ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) led->sloping = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) error:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) mutex_unlock(&led->chip->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) return ret;
^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) static int an30259a_dt_init(struct i2c_client *client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) struct an30259a *chip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) struct device_node *np = dev_of_node(&client->dev), *child;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) int count, ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) int i = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) const char *str;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) struct an30259a_led *led;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) count = of_get_available_child_count(np);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) if (!count || count > AN30259A_MAX_LEDS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) for_each_available_child_of_node(np, child) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) u32 source;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) ret = of_property_read_u32(child, "reg", &source);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) if (ret != 0 || !source || source > AN30259A_MAX_LEDS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) dev_err(&client->dev, "Couldn't read LED address: %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) count--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) led = &chip->leds[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) led->num = source;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) led->chip = chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) led->fwnode = of_fwnode_handle(child);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) if (!of_property_read_string(child, "default-state", &str)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) if (!strcmp(str, "on"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) led->default_state = STATE_ON;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) else if (!strcmp(str, "keep"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) led->default_state = STATE_KEEP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) led->default_state = STATE_OFF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) i++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) if (!count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) chip->num_leds = i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) static const struct regmap_config an30259a_regmap_config = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) .reg_bits = 8,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) .val_bits = 8,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) .max_register = AN30259A_REG_MAX,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) static void an30259a_init_default_state(struct an30259a_led *led)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) struct an30259a *chip = led->chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) int led_on, err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) switch (led->default_state) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) case STATE_ON:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) led->cdev.brightness = LED_FULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) case STATE_KEEP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) err = regmap_read(chip->regmap, AN30259A_REG_LED_ON, &led_on);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) if (!(led_on & AN30259A_LED_EN(led->num))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) led->cdev.brightness = LED_OFF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) regmap_read(chip->regmap, AN30259A_REG_LEDCC(led->num),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) &led->cdev.brightness);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) led->cdev.brightness = LED_OFF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) an30259a_brightness_set(&led->cdev, led->cdev.brightness);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) static int an30259a_probe(struct i2c_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) struct an30259a *chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) int i, err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) if (!chip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) err = an30259a_dt_init(client, chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) mutex_init(&chip->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) chip->client = client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) i2c_set_clientdata(client, chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) chip->regmap = devm_regmap_init_i2c(client, &an30259a_regmap_config);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) if (IS_ERR(chip->regmap)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) err = PTR_ERR(chip->regmap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) dev_err(&client->dev, "Failed to allocate register map: %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) for (i = 0; i < chip->num_leds; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) struct led_init_data init_data = {};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) an30259a_init_default_state(&chip->leds[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) chip->leds[i].cdev.brightness_set_blocking =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) an30259a_brightness_set;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) chip->leds[i].cdev.blink_set = an30259a_blink_set;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) init_data.fwnode = chip->leds[i].fwnode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) init_data.devicename = AN30259A_NAME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) init_data.default_label = ":";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) err = devm_led_classdev_register_ext(&client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) &chip->leds[i].cdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) &init_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) exit:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) mutex_destroy(&chip->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) static int an30259a_remove(struct i2c_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) struct an30259a *chip = i2c_get_clientdata(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) mutex_destroy(&chip->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) static const struct of_device_id an30259a_match_table[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) { .compatible = "panasonic,an30259a", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) { /* sentinel */ },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) MODULE_DEVICE_TABLE(of, an30259a_match_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) static const struct i2c_device_id an30259a_id[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) { "an30259a", 0 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) { /* sentinel */ },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) MODULE_DEVICE_TABLE(i2c, an30259a_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) static struct i2c_driver an30259a_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) .name = "leds-an30259a",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) .of_match_table = of_match_ptr(an30259a_match_table),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) .probe_new = an30259a_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) .remove = an30259a_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) .id_table = an30259a_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) module_i2c_driver(an30259a_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) MODULE_AUTHOR("Simon Shields <simon@lineageos.org>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) MODULE_DESCRIPTION("AN30259A LED driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) MODULE_LICENSE("GPL v2");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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