1b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu/* 2b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu * Copyright (C) 2011 ST-Ericsson SA. 3b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu * Copyright (C) 2009 Motorola, Inc. 4b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu * 5b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu * License Terms: GNU General Public License v2 6b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu * 7b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu * Simple driver for National Semiconductor LM3530 Backlight driver chip 8b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu * 9b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu * Author: Shreshtha Kumar SAHU <shreshthakumar.sahu@stericsson.com> 10b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu * based on leds-lm3530.c by Dan Murphy <D.Murphy@motorola.com> 11b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu */ 12b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 13b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu#include <linux/i2c.h> 14b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu#include <linux/leds.h> 15b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu#include <linux/slab.h> 16b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu#include <linux/platform_device.h> 17b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu#include <linux/input.h> 18b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu#include <linux/led-lm3530.h> 19b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu#include <linux/types.h> 209b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu#include <linux/regulator/consumer.h> 2154f4dedb5368fff81b722b551e2f15a75175d7b7Paul Gortmaker#include <linux/module.h> 22b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 23b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu#define LM3530_LED_DEV "lcd-backlight" 24b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu#define LM3530_NAME "lm3530-led" 25b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 26b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu#define LM3530_GEN_CONFIG 0x10 27b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu#define LM3530_ALS_CONFIG 0x20 28b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu#define LM3530_BRT_RAMP_RATE 0x30 29b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu#define LM3530_ALS_IMP_SELECT 0x41 30b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu#define LM3530_BRT_CTRL_REG 0xA0 31b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu#define LM3530_ALS_ZB0_REG 0x60 32b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu#define LM3530_ALS_ZB1_REG 0x61 33b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu#define LM3530_ALS_ZB2_REG 0x62 34b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu#define LM3530_ALS_ZB3_REG 0x63 35b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu#define LM3530_ALS_Z0T_REG 0x70 36b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu#define LM3530_ALS_Z1T_REG 0x71 37b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu#define LM3530_ALS_Z2T_REG 0x72 38b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu#define LM3530_ALS_Z3T_REG 0x73 39b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu#define LM3530_ALS_Z4T_REG 0x74 408544d0e3f6cd2d12af6d68992b15a6b3f5d35c2eKim, Milo#define LM3530_REG_MAX 14 41b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 42b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu/* General Control Register */ 43b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu#define LM3530_EN_I2C_SHIFT (0) 44b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu#define LM3530_RAMP_LAW_SHIFT (1) 45b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu#define LM3530_MAX_CURR_SHIFT (2) 46b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu#define LM3530_EN_PWM_SHIFT (5) 47b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu#define LM3530_PWM_POL_SHIFT (6) 48b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu#define LM3530_EN_PWM_SIMPLE_SHIFT (7) 49b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 50b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu#define LM3530_ENABLE_I2C (1 << LM3530_EN_I2C_SHIFT) 51b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu#define LM3530_ENABLE_PWM (1 << LM3530_EN_PWM_SHIFT) 52b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu#define LM3530_POL_LOW (1 << LM3530_PWM_POL_SHIFT) 53b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu#define LM3530_ENABLE_PWM_SIMPLE (1 << LM3530_EN_PWM_SIMPLE_SHIFT) 54b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 55b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu/* ALS Config Register Options */ 56b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu#define LM3530_ALS_AVG_TIME_SHIFT (0) 57b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu#define LM3530_EN_ALS_SHIFT (3) 58b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu#define LM3530_ALS_SEL_SHIFT (5) 59b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 60b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu#define LM3530_ENABLE_ALS (3 << LM3530_EN_ALS_SHIFT) 61b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 62b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu/* Brightness Ramp Rate Register */ 63b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu#define LM3530_BRT_RAMP_FALL_SHIFT (0) 64b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu#define LM3530_BRT_RAMP_RISE_SHIFT (3) 65b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 66b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu/* ALS Resistor Select */ 67b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu#define LM3530_ALS1_IMP_SHIFT (0) 68b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu#define LM3530_ALS2_IMP_SHIFT (4) 69b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 70b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu/* Zone Boundary Register defaults */ 7140b1445b1b6afc1ddac6ac31f4533277a0fb75dcShreshtha Kumar Sahu#define LM3530_ALS_ZB_MAX (4) 7240b1445b1b6afc1ddac6ac31f4533277a0fb75dcShreshtha Kumar Sahu#define LM3530_ALS_WINDOW_mV (1000) 7340b1445b1b6afc1ddac6ac31f4533277a0fb75dcShreshtha Kumar Sahu#define LM3530_ALS_OFFSET_mV (4) 74b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 75b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu/* Zone Target Register defaults */ 7640b1445b1b6afc1ddac6ac31f4533277a0fb75dcShreshtha Kumar Sahu#define LM3530_DEF_ZT_0 (0x7F) 7740b1445b1b6afc1ddac6ac31f4533277a0fb75dcShreshtha Kumar Sahu#define LM3530_DEF_ZT_1 (0x66) 78b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu#define LM3530_DEF_ZT_2 (0x4C) 7940b1445b1b6afc1ddac6ac31f4533277a0fb75dcShreshtha Kumar Sahu#define LM3530_DEF_ZT_3 (0x33) 8040b1445b1b6afc1ddac6ac31f4533277a0fb75dcShreshtha Kumar Sahu#define LM3530_DEF_ZT_4 (0x19) 81b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 82bbe6453204c568723679212f6d0653b92b3d6244Kim, Milo/* 7 bits are used for the brightness : LM3530_BRT_CTRL_REG */ 83bbe6453204c568723679212f6d0653b92b3d6244Kim, Milo#define MAX_BRIGHTNESS (127) 84bbe6453204c568723679212f6d0653b92b3d6244Kim, Milo 85b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahustruct lm3530_mode_map { 86b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu const char *mode; 87b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu enum lm3530_mode mode_val; 88b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu}; 89b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 90b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahustatic struct lm3530_mode_map mode_map[] = { 91b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu { "man", LM3530_BL_MODE_MANUAL }, 92b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu { "als", LM3530_BL_MODE_ALS }, 93b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu { "pwm", LM3530_BL_MODE_PWM }, 94b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu}; 95b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 96b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu/** 97b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu * struct lm3530_data 98b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu * @led_dev: led class device 99b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu * @client: i2c client 100b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu * @pdata: LM3530 platform data 101b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu * @mode: mode of operation - manual, ALS, PWM 1029b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu * @regulator: regulator 1039b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu * @brighness: previous brightness value 1049b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu * @enable: regulator is enabled 105b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu */ 106b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahustruct lm3530_data { 107b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu struct led_classdev led_dev; 108b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu struct i2c_client *client; 109b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu struct lm3530_platform_data *pdata; 110b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu enum lm3530_mode mode; 1119b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu struct regulator *regulator; 1129b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu enum led_brightness brightness; 1139b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu bool enable; 114b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu}; 115b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 116b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahustatic const u8 lm3530_reg[LM3530_REG_MAX] = { 117b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu LM3530_GEN_CONFIG, 118b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu LM3530_ALS_CONFIG, 119b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu LM3530_BRT_RAMP_RATE, 120b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu LM3530_ALS_IMP_SELECT, 121b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu LM3530_BRT_CTRL_REG, 122b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu LM3530_ALS_ZB0_REG, 123b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu LM3530_ALS_ZB1_REG, 124b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu LM3530_ALS_ZB2_REG, 125b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu LM3530_ALS_ZB3_REG, 126b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu LM3530_ALS_Z0T_REG, 127b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu LM3530_ALS_Z1T_REG, 128b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu LM3530_ALS_Z2T_REG, 129b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu LM3530_ALS_Z3T_REG, 130b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu LM3530_ALS_Z4T_REG, 131b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu}; 132b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 133b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahustatic int lm3530_get_mode_from_str(const char *str) 134b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu{ 135b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu int i; 136b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 137b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu for (i = 0; i < ARRAY_SIZE(mode_map); i++) 138b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu if (sysfs_streq(str, mode_map[i].mode)) 139b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu return mode_map[i].mode_val; 140b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 141b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu return -1; 142b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu} 143b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 144b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahustatic int lm3530_init_registers(struct lm3530_data *drvdata) 145b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu{ 146b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu int ret = 0; 147b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu int i; 148b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu u8 gen_config; 149b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu u8 als_config = 0; 150b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu u8 brt_ramp; 151b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu u8 als_imp_sel = 0; 152b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu u8 brightness; 153b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu u8 reg_val[LM3530_REG_MAX]; 15440b1445b1b6afc1ddac6ac31f4533277a0fb75dcShreshtha Kumar Sahu u8 zones[LM3530_ALS_ZB_MAX]; 15540b1445b1b6afc1ddac6ac31f4533277a0fb75dcShreshtha Kumar Sahu u32 als_vmin, als_vmax, als_vstep; 15699ad98d25961487d83ac4afac0375fe1f3e5c883Kim, Milo struct lm3530_platform_data *pdata = drvdata->pdata; 157b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu struct i2c_client *client = drvdata->client; 15899ad98d25961487d83ac4afac0375fe1f3e5c883Kim, Milo struct lm3530_pwm_data *pwm = &pdata->pwm_data; 159b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 16099ad98d25961487d83ac4afac0375fe1f3e5c883Kim, Milo gen_config = (pdata->brt_ramp_law << LM3530_RAMP_LAW_SHIFT) | 16199ad98d25961487d83ac4afac0375fe1f3e5c883Kim, Milo ((pdata->max_current & 7) << LM3530_MAX_CURR_SHIFT); 162b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 163cea694ca3d0894ee97482be1f22b822dc948c66fAxel Lin switch (drvdata->mode) { 164cea694ca3d0894ee97482be1f22b822dc948c66fAxel Lin case LM3530_BL_MODE_MANUAL: 165cea694ca3d0894ee97482be1f22b822dc948c66fAxel Lin case LM3530_BL_MODE_ALS: 166cea694ca3d0894ee97482be1f22b822dc948c66fAxel Lin gen_config |= LM3530_ENABLE_I2C; 167cea694ca3d0894ee97482be1f22b822dc948c66fAxel Lin break; 168cea694ca3d0894ee97482be1f22b822dc948c66fAxel Lin case LM3530_BL_MODE_PWM: 169cea694ca3d0894ee97482be1f22b822dc948c66fAxel Lin gen_config |= LM3530_ENABLE_PWM | LM3530_ENABLE_PWM_SIMPLE | 170cea694ca3d0894ee97482be1f22b822dc948c66fAxel Lin (pdata->pwm_pol_hi << LM3530_PWM_POL_SHIFT); 171cea694ca3d0894ee97482be1f22b822dc948c66fAxel Lin break; 172cea694ca3d0894ee97482be1f22b822dc948c66fAxel Lin } 173b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 174b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu if (drvdata->mode == LM3530_BL_MODE_ALS) { 17599ad98d25961487d83ac4afac0375fe1f3e5c883Kim, Milo if (pdata->als_vmax == 0) { 17699ad98d25961487d83ac4afac0375fe1f3e5c883Kim, Milo pdata->als_vmin = 0; 17799ad98d25961487d83ac4afac0375fe1f3e5c883Kim, Milo pdata->als_vmax = LM3530_ALS_WINDOW_mV; 17840b1445b1b6afc1ddac6ac31f4533277a0fb75dcShreshtha Kumar Sahu } 17940b1445b1b6afc1ddac6ac31f4533277a0fb75dcShreshtha Kumar Sahu 18099ad98d25961487d83ac4afac0375fe1f3e5c883Kim, Milo als_vmin = pdata->als_vmin; 18199ad98d25961487d83ac4afac0375fe1f3e5c883Kim, Milo als_vmax = pdata->als_vmax; 18240b1445b1b6afc1ddac6ac31f4533277a0fb75dcShreshtha Kumar Sahu 18340b1445b1b6afc1ddac6ac31f4533277a0fb75dcShreshtha Kumar Sahu if ((als_vmax - als_vmin) > LM3530_ALS_WINDOW_mV) 18499ad98d25961487d83ac4afac0375fe1f3e5c883Kim, Milo pdata->als_vmax = als_vmax = 18540b1445b1b6afc1ddac6ac31f4533277a0fb75dcShreshtha Kumar Sahu als_vmin + LM3530_ALS_WINDOW_mV; 18640b1445b1b6afc1ddac6ac31f4533277a0fb75dcShreshtha Kumar Sahu 18740b1445b1b6afc1ddac6ac31f4533277a0fb75dcShreshtha Kumar Sahu /* n zone boundary makes n+1 zones */ 18840b1445b1b6afc1ddac6ac31f4533277a0fb75dcShreshtha Kumar Sahu als_vstep = (als_vmax - als_vmin) / (LM3530_ALS_ZB_MAX + 1); 18940b1445b1b6afc1ddac6ac31f4533277a0fb75dcShreshtha Kumar Sahu 19040b1445b1b6afc1ddac6ac31f4533277a0fb75dcShreshtha Kumar Sahu for (i = 0; i < LM3530_ALS_ZB_MAX; i++) 19140b1445b1b6afc1ddac6ac31f4533277a0fb75dcShreshtha Kumar Sahu zones[i] = (((als_vmin + LM3530_ALS_OFFSET_mV) + 19240b1445b1b6afc1ddac6ac31f4533277a0fb75dcShreshtha Kumar Sahu als_vstep + (i * als_vstep)) * LED_FULL) 19340b1445b1b6afc1ddac6ac31f4533277a0fb75dcShreshtha Kumar Sahu / 1000; 19440b1445b1b6afc1ddac6ac31f4533277a0fb75dcShreshtha Kumar Sahu 195b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu als_config = 19699ad98d25961487d83ac4afac0375fe1f3e5c883Kim, Milo (pdata->als_avrg_time << LM3530_ALS_AVG_TIME_SHIFT) | 197b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu (LM3530_ENABLE_ALS) | 19899ad98d25961487d83ac4afac0375fe1f3e5c883Kim, Milo (pdata->als_input_mode << LM3530_ALS_SEL_SHIFT); 199b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 200b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu als_imp_sel = 20199ad98d25961487d83ac4afac0375fe1f3e5c883Kim, Milo (pdata->als1_resistor_sel << LM3530_ALS1_IMP_SHIFT) | 20299ad98d25961487d83ac4afac0375fe1f3e5c883Kim, Milo (pdata->als2_resistor_sel << LM3530_ALS2_IMP_SHIFT); 20340b1445b1b6afc1ddac6ac31f4533277a0fb75dcShreshtha Kumar Sahu 204b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu } 205b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 20699ad98d25961487d83ac4afac0375fe1f3e5c883Kim, Milo brt_ramp = (pdata->brt_ramp_fall << LM3530_BRT_RAMP_FALL_SHIFT) | 20799ad98d25961487d83ac4afac0375fe1f3e5c883Kim, Milo (pdata->brt_ramp_rise << LM3530_BRT_RAMP_RISE_SHIFT); 208b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 2099b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu if (drvdata->brightness) 2109b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu brightness = drvdata->brightness; 2119b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu else 21299ad98d25961487d83ac4afac0375fe1f3e5c883Kim, Milo brightness = drvdata->brightness = pdata->brt_val; 213b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 214bbe6453204c568723679212f6d0653b92b3d6244Kim, Milo if (brightness > drvdata->led_dev.max_brightness) 215bbe6453204c568723679212f6d0653b92b3d6244Kim, Milo brightness = drvdata->led_dev.max_brightness; 216bbe6453204c568723679212f6d0653b92b3d6244Kim, Milo 217b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu reg_val[0] = gen_config; /* LM3530_GEN_CONFIG */ 218b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu reg_val[1] = als_config; /* LM3530_ALS_CONFIG */ 219b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu reg_val[2] = brt_ramp; /* LM3530_BRT_RAMP_RATE */ 2208544d0e3f6cd2d12af6d68992b15a6b3f5d35c2eKim, Milo reg_val[3] = als_imp_sel; /* LM3530_ALS_IMP_SELECT */ 2218544d0e3f6cd2d12af6d68992b15a6b3f5d35c2eKim, Milo reg_val[4] = brightness; /* LM3530_BRT_CTRL_REG */ 2228544d0e3f6cd2d12af6d68992b15a6b3f5d35c2eKim, Milo reg_val[5] = zones[0]; /* LM3530_ALS_ZB0_REG */ 2238544d0e3f6cd2d12af6d68992b15a6b3f5d35c2eKim, Milo reg_val[6] = zones[1]; /* LM3530_ALS_ZB1_REG */ 2248544d0e3f6cd2d12af6d68992b15a6b3f5d35c2eKim, Milo reg_val[7] = zones[2]; /* LM3530_ALS_ZB2_REG */ 2258544d0e3f6cd2d12af6d68992b15a6b3f5d35c2eKim, Milo reg_val[8] = zones[3]; /* LM3530_ALS_ZB3_REG */ 2268544d0e3f6cd2d12af6d68992b15a6b3f5d35c2eKim, Milo reg_val[9] = LM3530_DEF_ZT_0; /* LM3530_ALS_Z0T_REG */ 2278544d0e3f6cd2d12af6d68992b15a6b3f5d35c2eKim, Milo reg_val[10] = LM3530_DEF_ZT_1; /* LM3530_ALS_Z1T_REG */ 2288544d0e3f6cd2d12af6d68992b15a6b3f5d35c2eKim, Milo reg_val[11] = LM3530_DEF_ZT_2; /* LM3530_ALS_Z2T_REG */ 2298544d0e3f6cd2d12af6d68992b15a6b3f5d35c2eKim, Milo reg_val[12] = LM3530_DEF_ZT_3; /* LM3530_ALS_Z3T_REG */ 2308544d0e3f6cd2d12af6d68992b15a6b3f5d35c2eKim, Milo reg_val[13] = LM3530_DEF_ZT_4; /* LM3530_ALS_Z4T_REG */ 231b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 2329b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu if (!drvdata->enable) { 2339b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu ret = regulator_enable(drvdata->regulator); 2349b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu if (ret) { 2359b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu dev_err(&drvdata->client->dev, 2369b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu "Enable regulator failed\n"); 2379b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu return ret; 2389b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu } 2399b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu drvdata->enable = true; 2409b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu } 2419b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu 242b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu for (i = 0; i < LM3530_REG_MAX; i++) { 243bb982009d3850759d3f4a4c853f9c456c48b6c2dKim, Milo /* do not update brightness register when pwm mode */ 244bb982009d3850759d3f4a4c853f9c456c48b6c2dKim, Milo if (lm3530_reg[i] == LM3530_BRT_CTRL_REG && 245bb982009d3850759d3f4a4c853f9c456c48b6c2dKim, Milo drvdata->mode == LM3530_BL_MODE_PWM) { 246bb982009d3850759d3f4a4c853f9c456c48b6c2dKim, Milo if (pwm->pwm_set_intensity) 247bb982009d3850759d3f4a4c853f9c456c48b6c2dKim, Milo pwm->pwm_set_intensity(reg_val[i], 248bb982009d3850759d3f4a4c853f9c456c48b6c2dKim, Milo drvdata->led_dev.max_brightness); 249bb982009d3850759d3f4a4c853f9c456c48b6c2dKim, Milo continue; 250bb982009d3850759d3f4a4c853f9c456c48b6c2dKim, Milo } 251bb982009d3850759d3f4a4c853f9c456c48b6c2dKim, Milo 252b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu ret = i2c_smbus_write_byte_data(client, 253b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu lm3530_reg[i], reg_val[i]); 254b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu if (ret) 255b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu break; 256b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu } 257b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 258b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu return ret; 259b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu} 260b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 261b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahustatic void lm3530_brightness_set(struct led_classdev *led_cdev, 262b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu enum led_brightness brt_val) 263b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu{ 264b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu int err; 265b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu struct lm3530_data *drvdata = 266b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu container_of(led_cdev, struct lm3530_data, led_dev); 267bb982009d3850759d3f4a4c853f9c456c48b6c2dKim, Milo struct lm3530_platform_data *pdata = drvdata->pdata; 268bb982009d3850759d3f4a4c853f9c456c48b6c2dKim, Milo struct lm3530_pwm_data *pwm = &pdata->pwm_data; 269bb982009d3850759d3f4a4c853f9c456c48b6c2dKim, Milo u8 max_brightness = led_cdev->max_brightness; 270b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 271b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu switch (drvdata->mode) { 272b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu case LM3530_BL_MODE_MANUAL: 273b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 2749b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu if (!drvdata->enable) { 2759b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu err = lm3530_init_registers(drvdata); 2769b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu if (err) { 2779b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu dev_err(&drvdata->client->dev, 2789b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu "Register Init failed: %d\n", err); 2799b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu break; 2809b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu } 2819b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu } 2829b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu 283b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu /* set the brightness in brightness control register*/ 284b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu err = i2c_smbus_write_byte_data(drvdata->client, 285bbe6453204c568723679212f6d0653b92b3d6244Kim, Milo LM3530_BRT_CTRL_REG, brt_val); 286b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu if (err) 287b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu dev_err(&drvdata->client->dev, 288b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu "Unable to set brightness: %d\n", err); 2899b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu else 290bbe6453204c568723679212f6d0653b92b3d6244Kim, Milo drvdata->brightness = brt_val; 2919b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu 2929b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu if (brt_val == 0) { 2939b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu err = regulator_disable(drvdata->regulator); 2949b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu if (err) 2959b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu dev_err(&drvdata->client->dev, 2969b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu "Disable regulator failed\n"); 2979b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu drvdata->enable = false; 2989b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu } 299b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu break; 300b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu case LM3530_BL_MODE_ALS: 301b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu break; 302b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu case LM3530_BL_MODE_PWM: 303bb982009d3850759d3f4a4c853f9c456c48b6c2dKim, Milo if (pwm->pwm_set_intensity) 304bb982009d3850759d3f4a4c853f9c456c48b6c2dKim, Milo pwm->pwm_set_intensity(brt_val, max_brightness); 305b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu break; 306b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu default: 307b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu break; 308b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu } 309b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu} 310b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 31140b1445b1b6afc1ddac6ac31f4533277a0fb75dcShreshtha Kumar Sahustatic ssize_t lm3530_mode_get(struct device *dev, 31240b1445b1b6afc1ddac6ac31f4533277a0fb75dcShreshtha Kumar Sahu struct device_attribute *attr, char *buf) 31340b1445b1b6afc1ddac6ac31f4533277a0fb75dcShreshtha Kumar Sahu{ 314e13d97865942e9dcf4fdd39d9fb9c5ae31e7c3d1Kim, Milo struct led_classdev *led_cdev = dev_get_drvdata(dev); 315e13d97865942e9dcf4fdd39d9fb9c5ae31e7c3d1Kim, Milo struct lm3530_data *drvdata; 31640b1445b1b6afc1ddac6ac31f4533277a0fb75dcShreshtha Kumar Sahu int i, len = 0; 31740b1445b1b6afc1ddac6ac31f4533277a0fb75dcShreshtha Kumar Sahu 318e13d97865942e9dcf4fdd39d9fb9c5ae31e7c3d1Kim, Milo drvdata = container_of(led_cdev, struct lm3530_data, led_dev); 31940b1445b1b6afc1ddac6ac31f4533277a0fb75dcShreshtha Kumar Sahu for (i = 0; i < ARRAY_SIZE(mode_map); i++) 32040b1445b1b6afc1ddac6ac31f4533277a0fb75dcShreshtha Kumar Sahu if (drvdata->mode == mode_map[i].mode_val) 32140b1445b1b6afc1ddac6ac31f4533277a0fb75dcShreshtha Kumar Sahu len += sprintf(buf + len, "[%s] ", mode_map[i].mode); 32240b1445b1b6afc1ddac6ac31f4533277a0fb75dcShreshtha Kumar Sahu else 32340b1445b1b6afc1ddac6ac31f4533277a0fb75dcShreshtha Kumar Sahu len += sprintf(buf + len, "%s ", mode_map[i].mode); 32440b1445b1b6afc1ddac6ac31f4533277a0fb75dcShreshtha Kumar Sahu 32540b1445b1b6afc1ddac6ac31f4533277a0fb75dcShreshtha Kumar Sahu len += sprintf(buf + len, "\n"); 32640b1445b1b6afc1ddac6ac31f4533277a0fb75dcShreshtha Kumar Sahu 32740b1445b1b6afc1ddac6ac31f4533277a0fb75dcShreshtha Kumar Sahu return len; 32840b1445b1b6afc1ddac6ac31f4533277a0fb75dcShreshtha Kumar Sahu} 329b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 330b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahustatic ssize_t lm3530_mode_set(struct device *dev, struct device_attribute 331b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu *attr, const char *buf, size_t size) 332b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu{ 333e13d97865942e9dcf4fdd39d9fb9c5ae31e7c3d1Kim, Milo struct led_classdev *led_cdev = dev_get_drvdata(dev); 334e13d97865942e9dcf4fdd39d9fb9c5ae31e7c3d1Kim, Milo struct lm3530_data *drvdata; 335bb982009d3850759d3f4a4c853f9c456c48b6c2dKim, Milo struct lm3530_pwm_data *pwm; 336bb982009d3850759d3f4a4c853f9c456c48b6c2dKim, Milo u8 max_brightness; 337e13d97865942e9dcf4fdd39d9fb9c5ae31e7c3d1Kim, Milo int mode, err; 338b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 339e13d97865942e9dcf4fdd39d9fb9c5ae31e7c3d1Kim, Milo drvdata = container_of(led_cdev, struct lm3530_data, led_dev); 340bb982009d3850759d3f4a4c853f9c456c48b6c2dKim, Milo pwm = &drvdata->pdata->pwm_data; 341bb982009d3850759d3f4a4c853f9c456c48b6c2dKim, Milo max_brightness = led_cdev->max_brightness; 342b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu mode = lm3530_get_mode_from_str(buf); 343b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu if (mode < 0) { 344b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu dev_err(dev, "Invalid mode\n"); 345b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu return -EINVAL; 346b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu } 347b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 348bb982009d3850759d3f4a4c853f9c456c48b6c2dKim, Milo drvdata->mode = mode; 349bb982009d3850759d3f4a4c853f9c456c48b6c2dKim, Milo 350bb982009d3850759d3f4a4c853f9c456c48b6c2dKim, Milo /* set pwm to low if unnecessary */ 351bb982009d3850759d3f4a4c853f9c456c48b6c2dKim, Milo if (mode != LM3530_BL_MODE_PWM && pwm->pwm_set_intensity) 352bb982009d3850759d3f4a4c853f9c456c48b6c2dKim, Milo pwm->pwm_set_intensity(0, max_brightness); 353b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 354b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu err = lm3530_init_registers(drvdata); 355b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu if (err) { 356b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu dev_err(dev, "Setting %s Mode failed :%d\n", buf, err); 357b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu return err; 358b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu } 359b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 360b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu return sizeof(drvdata->mode); 361b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu} 36240b1445b1b6afc1ddac6ac31f4533277a0fb75dcShreshtha Kumar Sahustatic DEVICE_ATTR(mode, 0644, lm3530_mode_get, lm3530_mode_set); 363b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 364b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahustatic int __devinit lm3530_probe(struct i2c_client *client, 365b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu const struct i2c_device_id *id) 366b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu{ 367b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu struct lm3530_platform_data *pdata = client->dev.platform_data; 368b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu struct lm3530_data *drvdata; 369b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu int err = 0; 370b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 371b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu if (pdata == NULL) { 372b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu dev_err(&client->dev, "platform data required\n"); 373b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu err = -ENODEV; 374b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu goto err_out; 375b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu } 376b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 377b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu /* BL mode */ 378b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu if (pdata->mode > LM3530_BL_MODE_PWM) { 379b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu dev_err(&client->dev, "Illegal Mode request\n"); 380b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu err = -EINVAL; 381b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu goto err_out; 382b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu } 383b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 384b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 385b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu dev_err(&client->dev, "I2C_FUNC_I2C not supported\n"); 386b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu err = -EIO; 387b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu goto err_out; 388b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu } 389b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 390b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu drvdata = kzalloc(sizeof(struct lm3530_data), GFP_KERNEL); 391b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu if (drvdata == NULL) { 392b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu err = -ENOMEM; 393b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu goto err_out; 394b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu } 395b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 396b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu drvdata->mode = pdata->mode; 397b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu drvdata->client = client; 398b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu drvdata->pdata = pdata; 3999b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu drvdata->brightness = LED_OFF; 4009b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu drvdata->enable = false; 401b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu drvdata->led_dev.name = LM3530_LED_DEV; 402b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu drvdata->led_dev.brightness_set = lm3530_brightness_set; 403bbe6453204c568723679212f6d0653b92b3d6244Kim, Milo drvdata->led_dev.max_brightness = MAX_BRIGHTNESS; 404b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 405b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu i2c_set_clientdata(client, drvdata); 406b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 4079b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu drvdata->regulator = regulator_get(&client->dev, "vin"); 4089b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu if (IS_ERR(drvdata->regulator)) { 4099b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu dev_err(&client->dev, "regulator get failed\n"); 4109b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu err = PTR_ERR(drvdata->regulator); 4119b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu drvdata->regulator = NULL; 4129b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu goto err_regulator_get; 413b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu } 414b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 4159b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu if (drvdata->pdata->brt_val) { 4169b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu err = lm3530_init_registers(drvdata); 4179b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu if (err < 0) { 4189b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu dev_err(&client->dev, 4199b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu "Register Init failed: %d\n", err); 4209b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu err = -ENODEV; 4219b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu goto err_reg_init; 4229b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu } 4239b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu } 4249b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu err = led_classdev_register(&client->dev, &drvdata->led_dev); 425b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu if (err < 0) { 426b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu dev_err(&client->dev, "Register led class failed: %d\n", err); 427b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu err = -ENODEV; 428b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu goto err_class_register; 429b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu } 430b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 431b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu err = device_create_file(drvdata->led_dev.dev, &dev_attr_mode); 432b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu if (err < 0) { 433b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu dev_err(&client->dev, "File device creation failed: %d\n", err); 434b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu err = -ENODEV; 435b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu goto err_create_file; 436b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu } 437b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 438b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu return 0; 439b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 440b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahuerr_create_file: 441b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu led_classdev_unregister(&drvdata->led_dev); 442b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahuerr_class_register: 443b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahuerr_reg_init: 4449b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu regulator_put(drvdata->regulator); 4459b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahuerr_regulator_get: 446b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu kfree(drvdata); 447b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahuerr_out: 448b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu return err; 449b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu} 450b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 451b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahustatic int __devexit lm3530_remove(struct i2c_client *client) 452b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu{ 453b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu struct lm3530_data *drvdata = i2c_get_clientdata(client); 454b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 455b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu device_remove_file(drvdata->led_dev.dev, &dev_attr_mode); 4569b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu 4579b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu if (drvdata->enable) 4589b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu regulator_disable(drvdata->regulator); 4599b2da53f7627304cd4030cb4883908bfb1bce998Shreshtha Kumar Sahu regulator_put(drvdata->regulator); 460b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu led_classdev_unregister(&drvdata->led_dev); 461b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu kfree(drvdata); 462b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu return 0; 463b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu} 464b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 465b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahustatic const struct i2c_device_id lm3530_id[] = { 466b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu {LM3530_NAME, 0}, 467b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu {} 468b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu}; 469d5f33d45e4c0e306e8d16b4573891a65d9ad544fAxel LinMODULE_DEVICE_TABLE(i2c, lm3530_id); 470b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 471b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahustatic struct i2c_driver lm3530_i2c_driver = { 472b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu .probe = lm3530_probe, 47393f539822ed60e18cd7fb417bff4efa1833af9f2Axel Lin .remove = __devexit_p(lm3530_remove), 474b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu .id_table = lm3530_id, 475b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu .driver = { 476b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu .name = LM3530_NAME, 477b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu .owner = THIS_MODULE, 478b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu }, 479b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu}; 480b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 48109a0d183ef3d310ee9d0b835d9db741fda9d6d46Axel Linmodule_i2c_driver(lm3530_i2c_driver); 482b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar Sahu 483b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar SahuMODULE_DESCRIPTION("Back Light driver for LM3530"); 484b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar SahuMODULE_LICENSE("GPL v2"); 485b1e6b7068f026e88257c20522555c78122e5a14dShreshtha Kumar SahuMODULE_AUTHOR("Shreshtha Kumar SAHU <shreshthakumar.sahu@stericsson.com>"); 486