^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) * Copyright (C) 2011 ST-Ericsson SA.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright (C) 2009 Motorola, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Simple driver for National Semiconductor LM3530 Backlight driver chip
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Author: Shreshtha Kumar SAHU <shreshthakumar.sahu@stericsson.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * based on leds-lm3530.c by Dan Murphy <D.Murphy@motorola.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/leds.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/slab.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) #include <linux/input.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/led-lm3530.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/regulator/consumer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #define LM3530_LED_DEV "lcd-backlight"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #define LM3530_NAME "lm3530-led"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #define LM3530_GEN_CONFIG 0x10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #define LM3530_ALS_CONFIG 0x20
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #define LM3530_BRT_RAMP_RATE 0x30
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #define LM3530_ALS_IMP_SELECT 0x41
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #define LM3530_BRT_CTRL_REG 0xA0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #define LM3530_ALS_ZB0_REG 0x60
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #define LM3530_ALS_ZB1_REG 0x61
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #define LM3530_ALS_ZB2_REG 0x62
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #define LM3530_ALS_ZB3_REG 0x63
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #define LM3530_ALS_Z0T_REG 0x70
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #define LM3530_ALS_Z1T_REG 0x71
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #define LM3530_ALS_Z2T_REG 0x72
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #define LM3530_ALS_Z3T_REG 0x73
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #define LM3530_ALS_Z4T_REG 0x74
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #define LM3530_REG_MAX 14
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) /* General Control Register */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #define LM3530_EN_I2C_SHIFT (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #define LM3530_RAMP_LAW_SHIFT (1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #define LM3530_MAX_CURR_SHIFT (2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #define LM3530_EN_PWM_SHIFT (5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #define LM3530_PWM_POL_SHIFT (6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) #define LM3530_EN_PWM_SIMPLE_SHIFT (7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) #define LM3530_ENABLE_I2C (1 << LM3530_EN_I2C_SHIFT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) #define LM3530_ENABLE_PWM (1 << LM3530_EN_PWM_SHIFT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #define LM3530_POL_LOW (1 << LM3530_PWM_POL_SHIFT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) #define LM3530_ENABLE_PWM_SIMPLE (1 << LM3530_EN_PWM_SIMPLE_SHIFT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) /* ALS Config Register Options */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) #define LM3530_ALS_AVG_TIME_SHIFT (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) #define LM3530_EN_ALS_SHIFT (3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) #define LM3530_ALS_SEL_SHIFT (5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) #define LM3530_ENABLE_ALS (3 << LM3530_EN_ALS_SHIFT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) /* Brightness Ramp Rate Register */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) #define LM3530_BRT_RAMP_FALL_SHIFT (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) #define LM3530_BRT_RAMP_RISE_SHIFT (3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) /* ALS Resistor Select */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) #define LM3530_ALS1_IMP_SHIFT (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) #define LM3530_ALS2_IMP_SHIFT (4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) /* Zone Boundary Register defaults */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) #define LM3530_ALS_ZB_MAX (4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) #define LM3530_ALS_WINDOW_mV (1000)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) #define LM3530_ALS_OFFSET_mV (4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) /* Zone Target Register defaults */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) #define LM3530_DEF_ZT_0 (0x7F)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) #define LM3530_DEF_ZT_1 (0x66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) #define LM3530_DEF_ZT_2 (0x4C)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) #define LM3530_DEF_ZT_3 (0x33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) #define LM3530_DEF_ZT_4 (0x19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) /* 7 bits are used for the brightness : LM3530_BRT_CTRL_REG */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) #define MAX_BRIGHTNESS (127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) struct lm3530_mode_map {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) const char *mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) enum lm3530_mode mode_val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) static struct lm3530_mode_map mode_map[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) { "man", LM3530_BL_MODE_MANUAL },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) { "als", LM3530_BL_MODE_ALS },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) { "pwm", LM3530_BL_MODE_PWM },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) };
^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) * struct lm3530_data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) * @led_dev: led class device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) * @client: i2c client
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) * @pdata: LM3530 platform data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) * @mode: mode of operation - manual, ALS, PWM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) * @regulator: regulator
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) * @brighness: previous brightness value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) * @enable: regulator is enabled
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) struct lm3530_data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) struct led_classdev led_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) struct i2c_client *client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) struct lm3530_platform_data *pdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) enum lm3530_mode mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) struct regulator *regulator;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) enum led_brightness brightness;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) bool enable;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) };
^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) * struct lm3530_als_data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) * @config : value of ALS configuration register
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) * @imp_sel : value of ALS resistor select register
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) * @zone : values of ALS ZB(Zone Boundary) registers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) struct lm3530_als_data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) u8 config;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) u8 imp_sel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) u8 zones[LM3530_ALS_ZB_MAX];
^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 const u8 lm3530_reg[LM3530_REG_MAX] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) LM3530_GEN_CONFIG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) LM3530_ALS_CONFIG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) LM3530_BRT_RAMP_RATE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) LM3530_ALS_IMP_SELECT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) LM3530_BRT_CTRL_REG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) LM3530_ALS_ZB0_REG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) LM3530_ALS_ZB1_REG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) LM3530_ALS_ZB2_REG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) LM3530_ALS_ZB3_REG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) LM3530_ALS_Z0T_REG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) LM3530_ALS_Z1T_REG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) LM3530_ALS_Z2T_REG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) LM3530_ALS_Z3T_REG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) LM3530_ALS_Z4T_REG,
^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) static int lm3530_get_mode_from_str(const char *str)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) for (i = 0; i < ARRAY_SIZE(mode_map); i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) if (sysfs_streq(str, mode_map[i].mode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) return mode_map[i].mode_val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) static void lm3530_als_configure(struct lm3530_platform_data *pdata,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) struct lm3530_als_data *als)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) u32 als_vmin, als_vmax, als_vstep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) if (pdata->als_vmax == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) pdata->als_vmin = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) pdata->als_vmax = LM3530_ALS_WINDOW_mV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) als_vmin = pdata->als_vmin;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) als_vmax = pdata->als_vmax;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) if ((als_vmax - als_vmin) > LM3530_ALS_WINDOW_mV)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) pdata->als_vmax = als_vmax = als_vmin + LM3530_ALS_WINDOW_mV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) /* n zone boundary makes n+1 zones */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) als_vstep = (als_vmax - als_vmin) / (LM3530_ALS_ZB_MAX + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) for (i = 0; i < LM3530_ALS_ZB_MAX; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) als->zones[i] = (((als_vmin + LM3530_ALS_OFFSET_mV) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) als_vstep + (i * als_vstep)) * LED_FULL) / 1000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) als->config =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) (pdata->als_avrg_time << LM3530_ALS_AVG_TIME_SHIFT) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) (LM3530_ENABLE_ALS) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) (pdata->als_input_mode << LM3530_ALS_SEL_SHIFT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) als->imp_sel =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) (pdata->als1_resistor_sel << LM3530_ALS1_IMP_SHIFT) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) (pdata->als2_resistor_sel << LM3530_ALS2_IMP_SHIFT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) static int lm3530_led_enable(struct lm3530_data *drvdata)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) if (drvdata->enable)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) ret = regulator_enable(drvdata->regulator);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) dev_err(drvdata->led_dev.dev, "Failed to enable vin:%d\n", ret);
^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) drvdata->enable = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) static void lm3530_led_disable(struct lm3530_data *drvdata)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) if (!drvdata->enable)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) ret = regulator_disable(drvdata->regulator);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) dev_err(drvdata->led_dev.dev, "Failed to disable vin:%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) drvdata->enable = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) static int lm3530_init_registers(struct lm3530_data *drvdata)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) u8 gen_config;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) u8 brt_ramp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) u8 brightness;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) u8 reg_val[LM3530_REG_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) struct lm3530_platform_data *pdata = drvdata->pdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) struct i2c_client *client = drvdata->client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) struct lm3530_pwm_data *pwm = &pdata->pwm_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) struct lm3530_als_data als;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) memset(&als, 0, sizeof(struct lm3530_als_data));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) gen_config = (pdata->brt_ramp_law << LM3530_RAMP_LAW_SHIFT) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) ((pdata->max_current & 7) << LM3530_MAX_CURR_SHIFT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) switch (drvdata->mode) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) case LM3530_BL_MODE_MANUAL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) gen_config |= LM3530_ENABLE_I2C;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) case LM3530_BL_MODE_ALS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) gen_config |= LM3530_ENABLE_I2C;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) lm3530_als_configure(pdata, &als);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) case LM3530_BL_MODE_PWM:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) gen_config |= LM3530_ENABLE_PWM | LM3530_ENABLE_PWM_SIMPLE |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) (pdata->pwm_pol_hi << LM3530_PWM_POL_SHIFT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) brt_ramp = (pdata->brt_ramp_fall << LM3530_BRT_RAMP_FALL_SHIFT) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) (pdata->brt_ramp_rise << LM3530_BRT_RAMP_RISE_SHIFT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) if (drvdata->brightness)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) brightness = drvdata->brightness;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) brightness = drvdata->brightness = pdata->brt_val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) if (brightness > drvdata->led_dev.max_brightness)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) brightness = drvdata->led_dev.max_brightness;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) reg_val[0] = gen_config; /* LM3530_GEN_CONFIG */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) reg_val[1] = als.config; /* LM3530_ALS_CONFIG */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) reg_val[2] = brt_ramp; /* LM3530_BRT_RAMP_RATE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) reg_val[3] = als.imp_sel; /* LM3530_ALS_IMP_SELECT */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) reg_val[4] = brightness; /* LM3530_BRT_CTRL_REG */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) reg_val[5] = als.zones[0]; /* LM3530_ALS_ZB0_REG */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) reg_val[6] = als.zones[1]; /* LM3530_ALS_ZB1_REG */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) reg_val[7] = als.zones[2]; /* LM3530_ALS_ZB2_REG */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) reg_val[8] = als.zones[3]; /* LM3530_ALS_ZB3_REG */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) reg_val[9] = LM3530_DEF_ZT_0; /* LM3530_ALS_Z0T_REG */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) reg_val[10] = LM3530_DEF_ZT_1; /* LM3530_ALS_Z1T_REG */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) reg_val[11] = LM3530_DEF_ZT_2; /* LM3530_ALS_Z2T_REG */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) reg_val[12] = LM3530_DEF_ZT_3; /* LM3530_ALS_Z3T_REG */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) reg_val[13] = LM3530_DEF_ZT_4; /* LM3530_ALS_Z4T_REG */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) ret = lm3530_led_enable(drvdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) for (i = 0; i < LM3530_REG_MAX; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) /* do not update brightness register when pwm mode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) if (lm3530_reg[i] == LM3530_BRT_CTRL_REG &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) drvdata->mode == LM3530_BL_MODE_PWM) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) if (pwm->pwm_set_intensity)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) pwm->pwm_set_intensity(reg_val[i],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) drvdata->led_dev.max_brightness);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) ret = i2c_smbus_write_byte_data(client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) lm3530_reg[i], reg_val[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) static void lm3530_brightness_set(struct led_classdev *led_cdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) enum led_brightness brt_val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) struct lm3530_data *drvdata =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) container_of(led_cdev, struct lm3530_data, led_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) struct lm3530_platform_data *pdata = drvdata->pdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) struct lm3530_pwm_data *pwm = &pdata->pwm_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) u8 max_brightness = led_cdev->max_brightness;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) switch (drvdata->mode) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) case LM3530_BL_MODE_MANUAL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) if (!drvdata->enable) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) err = lm3530_init_registers(drvdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) dev_err(&drvdata->client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) "Register Init failed: %d\n", err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) /* set the brightness in brightness control register*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) err = i2c_smbus_write_byte_data(drvdata->client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) LM3530_BRT_CTRL_REG, brt_val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) dev_err(&drvdata->client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) "Unable to set brightness: %d\n", err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) drvdata->brightness = brt_val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) if (brt_val == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) lm3530_led_disable(drvdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) case LM3530_BL_MODE_ALS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) case LM3530_BL_MODE_PWM:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) if (pwm->pwm_set_intensity)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) pwm->pwm_set_intensity(brt_val, max_brightness);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) static ssize_t lm3530_mode_get(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) struct device_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) struct led_classdev *led_cdev = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) struct lm3530_data *drvdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) int i, len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) drvdata = container_of(led_cdev, struct lm3530_data, led_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) for (i = 0; i < ARRAY_SIZE(mode_map); i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) if (drvdata->mode == mode_map[i].mode_val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) len += sprintf(buf + len, "[%s] ", mode_map[i].mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) len += sprintf(buf + len, "%s ", mode_map[i].mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) len += sprintf(buf + len, "\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) return len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) static ssize_t lm3530_mode_set(struct device *dev, struct device_attribute
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) *attr, const char *buf, size_t size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) struct led_classdev *led_cdev = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) struct lm3530_data *drvdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) struct lm3530_pwm_data *pwm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) u8 max_brightness;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) int mode, err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) drvdata = container_of(led_cdev, struct lm3530_data, led_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) pwm = &drvdata->pdata->pwm_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) max_brightness = led_cdev->max_brightness;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) mode = lm3530_get_mode_from_str(buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) if (mode < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) dev_err(dev, "Invalid mode\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) return mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) drvdata->mode = mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) /* set pwm to low if unnecessary */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) if (mode != LM3530_BL_MODE_PWM && pwm->pwm_set_intensity)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) pwm->pwm_set_intensity(0, max_brightness);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) err = lm3530_init_registers(drvdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) dev_err(dev, "Setting %s Mode failed :%d\n", buf, err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) return sizeof(drvdata->mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) static DEVICE_ATTR(mode, 0644, lm3530_mode_get, lm3530_mode_set);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) static struct attribute *lm3530_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) &dev_attr_mode.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) ATTRIBUTE_GROUPS(lm3530);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) static int lm3530_probe(struct i2c_client *client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) const struct i2c_device_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) struct lm3530_platform_data *pdata = dev_get_platdata(&client->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) struct lm3530_data *drvdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) if (pdata == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) dev_err(&client->dev, "platform data required\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) /* BL mode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) if (pdata->mode > LM3530_BL_MODE_PWM) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) dev_err(&client->dev, "Illegal Mode request\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) dev_err(&client->dev, "I2C_FUNC_I2C not supported\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) drvdata = devm_kzalloc(&client->dev, sizeof(struct lm3530_data),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) if (drvdata == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) drvdata->mode = pdata->mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) drvdata->client = client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) drvdata->pdata = pdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) drvdata->brightness = LED_OFF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) drvdata->enable = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) drvdata->led_dev.name = LM3530_LED_DEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) drvdata->led_dev.brightness_set = lm3530_brightness_set;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) drvdata->led_dev.max_brightness = MAX_BRIGHTNESS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) drvdata->led_dev.groups = lm3530_groups;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) i2c_set_clientdata(client, drvdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) drvdata->regulator = devm_regulator_get(&client->dev, "vin");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) if (IS_ERR(drvdata->regulator)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) dev_err(&client->dev, "regulator get failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) err = PTR_ERR(drvdata->regulator);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) drvdata->regulator = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) if (drvdata->pdata->brt_val) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) err = lm3530_init_registers(drvdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) if (err < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) dev_err(&client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) "Register Init failed: %d\n", err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) err = led_classdev_register(&client->dev, &drvdata->led_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) if (err < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) dev_err(&client->dev, "Register led class failed: %d\n", err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) static int lm3530_remove(struct i2c_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) struct lm3530_data *drvdata = i2c_get_clientdata(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) lm3530_led_disable(drvdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) led_classdev_unregister(&drvdata->led_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) static const struct i2c_device_id lm3530_id[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) {LM3530_NAME, 0},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) {}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) MODULE_DEVICE_TABLE(i2c, lm3530_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) static struct i2c_driver lm3530_i2c_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) .probe = lm3530_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) .remove = lm3530_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) .id_table = lm3530_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) .name = LM3530_NAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) module_i2c_driver(lm3530_i2c_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) MODULE_DESCRIPTION("Back Light driver for LM3530");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) MODULE_LICENSE("GPL v2");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) MODULE_AUTHOR("Shreshtha Kumar SAHU <shreshthakumar.sahu@stericsson.com>");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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