| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* |
| * Copyright (C) 2011 ST-Ericsson SA. |
| * Copyright (C) 2009 Motorola, Inc. |
| * |
| * Simple driver for National Semiconductor LM35330 Backlight driver chip |
| * |
| * Author: Shreshtha Kumar SAHU <shreshthakumar.sahu@stericsson.com> |
| * based on leds-lm3530.c by Dan Murphy <D.Murphy@motorola.com> |
| */ |
| |
| #ifndef _LINUX_LED_LM3530_H__ |
| #define _LINUX_LED_LM3530_H__ |
| |
| #define LM3530_FS_CURR_5mA (0) /* Full Scale Current */ |
| #define LM3530_FS_CURR_8mA (1) |
| #define LM3530_FS_CURR_12mA (2) |
| #define LM3530_FS_CURR_15mA (3) |
| #define LM3530_FS_CURR_19mA (4) |
| #define LM3530_FS_CURR_22mA (5) |
| #define LM3530_FS_CURR_26mA (6) |
| #define LM3530_FS_CURR_29mA (7) |
| |
| #define LM3530_ALS_AVRG_TIME_32ms (0) /* ALS Averaging Time */ |
| #define LM3530_ALS_AVRG_TIME_64ms (1) |
| #define LM3530_ALS_AVRG_TIME_128ms (2) |
| #define LM3530_ALS_AVRG_TIME_256ms (3) |
| #define LM3530_ALS_AVRG_TIME_512ms (4) |
| #define LM3530_ALS_AVRG_TIME_1024ms (5) |
| #define LM3530_ALS_AVRG_TIME_2048ms (6) |
| #define LM3530_ALS_AVRG_TIME_4096ms (7) |
| |
| #define LM3530_RAMP_TIME_1ms (0) /* Brigtness Ramp Time */ |
| #define LM3530_RAMP_TIME_130ms (1) /* Max to 0 and vice versa */ |
| #define LM3530_RAMP_TIME_260ms (2) |
| #define LM3530_RAMP_TIME_520ms (3) |
| #define LM3530_RAMP_TIME_1s (4) |
| #define LM3530_RAMP_TIME_2s (5) |
| #define LM3530_RAMP_TIME_4s (6) |
| #define LM3530_RAMP_TIME_8s (7) |
| |
| /* ALS Resistor Select */ |
| #define LM3530_ALS_IMPD_Z (0x00) /* ALS Impedance */ |
| #define LM3530_ALS_IMPD_13_53kOhm (0x01) |
| #define LM3530_ALS_IMPD_9_01kOhm (0x02) |
| #define LM3530_ALS_IMPD_5_41kOhm (0x03) |
| #define LM3530_ALS_IMPD_2_27kOhm (0x04) |
| #define LM3530_ALS_IMPD_1_94kOhm (0x05) |
| #define LM3530_ALS_IMPD_1_81kOhm (0x06) |
| #define LM3530_ALS_IMPD_1_6kOhm (0x07) |
| #define LM3530_ALS_IMPD_1_138kOhm (0x08) |
| #define LM3530_ALS_IMPD_1_05kOhm (0x09) |
| #define LM3530_ALS_IMPD_1_011kOhm (0x0A) |
| #define LM3530_ALS_IMPD_941Ohm (0x0B) |
| #define LM3530_ALS_IMPD_759Ohm (0x0C) |
| #define LM3530_ALS_IMPD_719Ohm (0x0D) |
| #define LM3530_ALS_IMPD_700Ohm (0x0E) |
| #define LM3530_ALS_IMPD_667Ohm (0x0F) |
| |
| enum lm3530_mode { |
| LM3530_BL_MODE_MANUAL = 0, /* "man" */ |
| LM3530_BL_MODE_ALS, /* "als" */ |
| LM3530_BL_MODE_PWM, /* "pwm" */ |
| }; |
| |
| /* ALS input select */ |
| enum lm3530_als_mode { |
| LM3530_INPUT_AVRG = 0, /* ALS1 and ALS2 input average */ |
| LM3530_INPUT_ALS1, /* ALS1 Input */ |
| LM3530_INPUT_ALS2, /* ALS2 Input */ |
| LM3530_INPUT_CEIL, /* Max of ALS1 and ALS2 */ |
| }; |
| |
| /* PWM Platform Specific Data */ |
| struct lm3530_pwm_data { |
| void (*pwm_set_intensity) (int brightness, int max_brightness); |
| int (*pwm_get_intensity) (int max_brightness); |
| }; |
| |
| /** |
| * struct lm3530_platform_data |
| * @mode: mode of operation i.e. Manual, ALS or PWM |
| * @als_input_mode: select source of ALS input - ALS1/2 or average |
| * @max_current: full scale LED current |
| * @pwm_pol_hi: PWM input polarity - active high/active low |
| * @als_avrg_time: ALS input averaging time |
| * @brt_ramp_law: brightness mapping mode - exponential/linear |
| * @brt_ramp_fall: rate of fall of led current |
| * @brt_ramp_rise: rate of rise of led current |
| * @als1_resistor_sel: internal resistance from ALS1 input to ground |
| * @als2_resistor_sel: internal resistance from ALS2 input to ground |
| * @als_vmin: als input voltage calibrated for max brightness in mV |
| * @als_vmax: als input voltage calibrated for min brightness in mV |
| * @brt_val: brightness value (0-127) |
| * @pwm_data: PWM control functions (only valid when the mode is PWM) |
| */ |
| struct lm3530_platform_data { |
| enum lm3530_mode mode; |
| enum lm3530_als_mode als_input_mode; |
| |
| u8 max_current; |
| bool pwm_pol_hi; |
| u8 als_avrg_time; |
| |
| bool brt_ramp_law; |
| u8 brt_ramp_fall; |
| u8 brt_ramp_rise; |
| |
| u8 als1_resistor_sel; |
| u8 als2_resistor_sel; |
| |
| u32 als_vmin; |
| u32 als_vmax; |
| |
| u8 brt_val; |
| |
| struct lm3530_pwm_data pwm_data; |
| }; |
| |
| #endif /* _LINUX_LED_LM3530_H__ */ |