diff options
| author | Shreshtha Kumar Sahu <shreshthakumar.sahu@stericsson.com> | 2011-03-22 16:30:16 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-03-22 17:43:59 -0700 |
| commit | b1e6b7068f026e88257c20522555c78122e5a14d (patch) | |
| tree | 21cbe63961ce77a0077a638fcfbda84d4530a63e /include | |
| parent | 551ea73838c5eba18d673bd4e7fb0fec77cdcb8a (diff) | |
leds: add driver for LM3530 ALS
Simple backlight driver for National Semiconductor LM3530. Presently only
manual mode is supported, PWM and ALS support to be added.
Signed-off-by: Shreshtha Kumar Sahu <shreshthakumar.sahu@stericsson.com>
Cc: Linus Walleij <linus.walleij@stericsson.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/led-lm3530.h | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/include/linux/led-lm3530.h b/include/linux/led-lm3530.h new file mode 100644 index 000000000000..bb69d20da0dc --- /dev/null +++ b/include/linux/led-lm3530.h @@ -0,0 +1,107 @@ +/* + * Copyright (C) 2011 ST-Ericsson SA. + * Copyright (C) 2009 Motorola, Inc. + * + * License Terms: GNU General Public License v2 + * + * 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 Impedence */ +#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 */ +}; + +/** + * 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 + * @brt_val: brightness value (0-255) + */ +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; + + u8 brt_val; +}; + +#endif /* _LINUX_LED_LM3530_H__ */ |