1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-only */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * Copyright (C) 2011 ST-Ericsson SA. 4*4882a593Smuzhiyun * Copyright (C) 2009 Motorola, Inc. 5*4882a593Smuzhiyun * 6*4882a593Smuzhiyun * Simple driver for National Semiconductor LM35330 Backlight driver chip 7*4882a593Smuzhiyun * 8*4882a593Smuzhiyun * Author: Shreshtha Kumar SAHU <shreshthakumar.sahu@stericsson.com> 9*4882a593Smuzhiyun * based on leds-lm3530.c by Dan Murphy <D.Murphy@motorola.com> 10*4882a593Smuzhiyun */ 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun #ifndef _LINUX_LED_LM3530_H__ 13*4882a593Smuzhiyun #define _LINUX_LED_LM3530_H__ 14*4882a593Smuzhiyun 15*4882a593Smuzhiyun #define LM3530_FS_CURR_5mA (0) /* Full Scale Current */ 16*4882a593Smuzhiyun #define LM3530_FS_CURR_8mA (1) 17*4882a593Smuzhiyun #define LM3530_FS_CURR_12mA (2) 18*4882a593Smuzhiyun #define LM3530_FS_CURR_15mA (3) 19*4882a593Smuzhiyun #define LM3530_FS_CURR_19mA (4) 20*4882a593Smuzhiyun #define LM3530_FS_CURR_22mA (5) 21*4882a593Smuzhiyun #define LM3530_FS_CURR_26mA (6) 22*4882a593Smuzhiyun #define LM3530_FS_CURR_29mA (7) 23*4882a593Smuzhiyun 24*4882a593Smuzhiyun #define LM3530_ALS_AVRG_TIME_32ms (0) /* ALS Averaging Time */ 25*4882a593Smuzhiyun #define LM3530_ALS_AVRG_TIME_64ms (1) 26*4882a593Smuzhiyun #define LM3530_ALS_AVRG_TIME_128ms (2) 27*4882a593Smuzhiyun #define LM3530_ALS_AVRG_TIME_256ms (3) 28*4882a593Smuzhiyun #define LM3530_ALS_AVRG_TIME_512ms (4) 29*4882a593Smuzhiyun #define LM3530_ALS_AVRG_TIME_1024ms (5) 30*4882a593Smuzhiyun #define LM3530_ALS_AVRG_TIME_2048ms (6) 31*4882a593Smuzhiyun #define LM3530_ALS_AVRG_TIME_4096ms (7) 32*4882a593Smuzhiyun 33*4882a593Smuzhiyun #define LM3530_RAMP_TIME_1ms (0) /* Brigtness Ramp Time */ 34*4882a593Smuzhiyun #define LM3530_RAMP_TIME_130ms (1) /* Max to 0 and vice versa */ 35*4882a593Smuzhiyun #define LM3530_RAMP_TIME_260ms (2) 36*4882a593Smuzhiyun #define LM3530_RAMP_TIME_520ms (3) 37*4882a593Smuzhiyun #define LM3530_RAMP_TIME_1s (4) 38*4882a593Smuzhiyun #define LM3530_RAMP_TIME_2s (5) 39*4882a593Smuzhiyun #define LM3530_RAMP_TIME_4s (6) 40*4882a593Smuzhiyun #define LM3530_RAMP_TIME_8s (7) 41*4882a593Smuzhiyun 42*4882a593Smuzhiyun /* ALS Resistor Select */ 43*4882a593Smuzhiyun #define LM3530_ALS_IMPD_Z (0x00) /* ALS Impedance */ 44*4882a593Smuzhiyun #define LM3530_ALS_IMPD_13_53kOhm (0x01) 45*4882a593Smuzhiyun #define LM3530_ALS_IMPD_9_01kOhm (0x02) 46*4882a593Smuzhiyun #define LM3530_ALS_IMPD_5_41kOhm (0x03) 47*4882a593Smuzhiyun #define LM3530_ALS_IMPD_2_27kOhm (0x04) 48*4882a593Smuzhiyun #define LM3530_ALS_IMPD_1_94kOhm (0x05) 49*4882a593Smuzhiyun #define LM3530_ALS_IMPD_1_81kOhm (0x06) 50*4882a593Smuzhiyun #define LM3530_ALS_IMPD_1_6kOhm (0x07) 51*4882a593Smuzhiyun #define LM3530_ALS_IMPD_1_138kOhm (0x08) 52*4882a593Smuzhiyun #define LM3530_ALS_IMPD_1_05kOhm (0x09) 53*4882a593Smuzhiyun #define LM3530_ALS_IMPD_1_011kOhm (0x0A) 54*4882a593Smuzhiyun #define LM3530_ALS_IMPD_941Ohm (0x0B) 55*4882a593Smuzhiyun #define LM3530_ALS_IMPD_759Ohm (0x0C) 56*4882a593Smuzhiyun #define LM3530_ALS_IMPD_719Ohm (0x0D) 57*4882a593Smuzhiyun #define LM3530_ALS_IMPD_700Ohm (0x0E) 58*4882a593Smuzhiyun #define LM3530_ALS_IMPD_667Ohm (0x0F) 59*4882a593Smuzhiyun 60*4882a593Smuzhiyun enum lm3530_mode { 61*4882a593Smuzhiyun LM3530_BL_MODE_MANUAL = 0, /* "man" */ 62*4882a593Smuzhiyun LM3530_BL_MODE_ALS, /* "als" */ 63*4882a593Smuzhiyun LM3530_BL_MODE_PWM, /* "pwm" */ 64*4882a593Smuzhiyun }; 65*4882a593Smuzhiyun 66*4882a593Smuzhiyun /* ALS input select */ 67*4882a593Smuzhiyun enum lm3530_als_mode { 68*4882a593Smuzhiyun LM3530_INPUT_AVRG = 0, /* ALS1 and ALS2 input average */ 69*4882a593Smuzhiyun LM3530_INPUT_ALS1, /* ALS1 Input */ 70*4882a593Smuzhiyun LM3530_INPUT_ALS2, /* ALS2 Input */ 71*4882a593Smuzhiyun LM3530_INPUT_CEIL, /* Max of ALS1 and ALS2 */ 72*4882a593Smuzhiyun }; 73*4882a593Smuzhiyun 74*4882a593Smuzhiyun /* PWM Platform Specific Data */ 75*4882a593Smuzhiyun struct lm3530_pwm_data { 76*4882a593Smuzhiyun void (*pwm_set_intensity) (int brightness, int max_brightness); 77*4882a593Smuzhiyun int (*pwm_get_intensity) (int max_brightness); 78*4882a593Smuzhiyun }; 79*4882a593Smuzhiyun 80*4882a593Smuzhiyun /** 81*4882a593Smuzhiyun * struct lm3530_platform_data 82*4882a593Smuzhiyun * @mode: mode of operation i.e. Manual, ALS or PWM 83*4882a593Smuzhiyun * @als_input_mode: select source of ALS input - ALS1/2 or average 84*4882a593Smuzhiyun * @max_current: full scale LED current 85*4882a593Smuzhiyun * @pwm_pol_hi: PWM input polarity - active high/active low 86*4882a593Smuzhiyun * @als_avrg_time: ALS input averaging time 87*4882a593Smuzhiyun * @brt_ramp_law: brightness mapping mode - exponential/linear 88*4882a593Smuzhiyun * @brt_ramp_fall: rate of fall of led current 89*4882a593Smuzhiyun * @brt_ramp_rise: rate of rise of led current 90*4882a593Smuzhiyun * @als1_resistor_sel: internal resistance from ALS1 input to ground 91*4882a593Smuzhiyun * @als2_resistor_sel: internal resistance from ALS2 input to ground 92*4882a593Smuzhiyun * @als_vmin: als input voltage calibrated for max brightness in mV 93*4882a593Smuzhiyun * @als_vmax: als input voltage calibrated for min brightness in mV 94*4882a593Smuzhiyun * @brt_val: brightness value (0-127) 95*4882a593Smuzhiyun * @pwm_data: PWM control functions (only valid when the mode is PWM) 96*4882a593Smuzhiyun */ 97*4882a593Smuzhiyun struct lm3530_platform_data { 98*4882a593Smuzhiyun enum lm3530_mode mode; 99*4882a593Smuzhiyun enum lm3530_als_mode als_input_mode; 100*4882a593Smuzhiyun 101*4882a593Smuzhiyun u8 max_current; 102*4882a593Smuzhiyun bool pwm_pol_hi; 103*4882a593Smuzhiyun u8 als_avrg_time; 104*4882a593Smuzhiyun 105*4882a593Smuzhiyun bool brt_ramp_law; 106*4882a593Smuzhiyun u8 brt_ramp_fall; 107*4882a593Smuzhiyun u8 brt_ramp_rise; 108*4882a593Smuzhiyun 109*4882a593Smuzhiyun u8 als1_resistor_sel; 110*4882a593Smuzhiyun u8 als2_resistor_sel; 111*4882a593Smuzhiyun 112*4882a593Smuzhiyun u32 als_vmin; 113*4882a593Smuzhiyun u32 als_vmax; 114*4882a593Smuzhiyun 115*4882a593Smuzhiyun u8 brt_val; 116*4882a593Smuzhiyun 117*4882a593Smuzhiyun struct lm3530_pwm_data pwm_data; 118*4882a593Smuzhiyun }; 119*4882a593Smuzhiyun 120*4882a593Smuzhiyun #endif /* _LINUX_LED_LM3530_H__ */ 121