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The lp5521 has autonomous operation mode without external control. Using lp5521_platform_data, various led patterns can be configurable. For supporting this feature, new functions and device attribute are added. Structure of lp5521_led_pattern: 3 channels are supported - red, green and blue. Pattern(s) of each channel and numbers of pattern(s) are defined in the pla= tform data. Pattern data are hexa codes which include pattern commands such like set pwm, wait, ramp up/down, branch and so on. Pattern mode functions: * lp5521_clear_program_memory Before running new led pattern, program memory should be cleared. * lp5521_write_program_memory Pattern data updated in the program memory via the i2c. * lp5521_get_pattern Get pattern from predefined in the platform data. * lp5521_run_led_pattern Stop current pattern or run new pattern. Transition time is required between different operation mode. Device attribute - 'led_pattern': To load specific led pattern, new device attribute is added. When the lp5521 driver is unloaded, stop current led pattern mode. Documentation updated : description about how to define the led patterns and example. [akpm@linux-foundation.org: checkpatch fixes] Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Cc: Arun MURTHY <arun.murthy@stericsson.com> Cc: Srinidhi Kasagar <srinidhi.kasagar@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>
74 lines
2.1 KiB
C
74 lines
2.1 KiB
C
/*
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* LP5521 LED chip driver.
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*
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* Copyright (C) 2010 Nokia Corporation
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*
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* Contact: Samu Onkalo <samu.p.onkalo@nokia.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*/
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#ifndef __LINUX_LP5521_H
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#define __LINUX_LP5521_H
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/* See Documentation/leds/leds-lp5521.txt */
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struct lp5521_led_config {
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char *name;
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u8 chan_nr;
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u8 led_current; /* mA x10, 0 if led is not connected */
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u8 max_current;
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};
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struct lp5521_led_pattern {
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u8 *r;
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u8 *g;
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u8 *b;
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u8 size_r;
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u8 size_g;
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u8 size_b;
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};
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#define LP5521_CLOCK_AUTO 0
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#define LP5521_CLOCK_INT 1
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#define LP5521_CLOCK_EXT 2
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/* Bits in CONFIG register */
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#define LP5521_PWM_HF 0x40 /* PWM: 0 = 256Hz, 1 = 558Hz */
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#define LP5521_PWRSAVE_EN 0x20 /* 1 = Power save mode */
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#define LP5521_CP_MODE_OFF 0 /* Charge pump (CP) off */
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#define LP5521_CP_MODE_BYPASS 8 /* CP forced to bypass mode */
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#define LP5521_CP_MODE_1X5 0x10 /* CP forced to 1.5x mode */
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#define LP5521_CP_MODE_AUTO 0x18 /* Automatic mode selection */
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#define LP5521_R_TO_BATT 4 /* R out: 0 = CP, 1 = Vbat */
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#define LP5521_CLK_SRC_EXT 0 /* Ext-clk source (CLK_32K) */
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#define LP5521_CLK_INT 1 /* Internal clock */
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#define LP5521_CLK_AUTO 2 /* Automatic clock selection */
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struct lp5521_platform_data {
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struct lp5521_led_config *led_config;
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u8 num_channels;
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u8 clock_mode;
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int (*setup_resources)(void);
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void (*release_resources)(void);
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void (*enable)(bool state);
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const char *label;
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u8 update_config;
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struct lp5521_led_pattern *patterns;
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int num_patterns;
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};
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#endif /* __LINUX_LP5521_H */
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