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drivers/leds/leds-lp5521.c: support led pattern data

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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>
This commit is contained in:
Kim, Milo 2012-03-23 15:02:09 -07:00 • committed by Linus Torvalds
commit 011af7bc7c
3 changed files with 150 additions and 1 deletions
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11
include/linux/leds-lp5521.h
View file

@ -32,6 +32,15 @@ struct lp5521_led_config {
u8 max_current;
};
struct lp5521_led_pattern {
u8 *r;
u8 *g;
u8 *b;
u8 size_r;
u8 size_g;
u8 size_b;
};
#define LP5521_CLOCK_AUTO 0
#define LP5521_CLOCK_INT 1
#define LP5521_CLOCK_EXT 2
@ -57,6 +66,8 @@ struct lp5521_platform_data {
void (*enable)(bool state);
const char *label;
u8 update_config;
struct lp5521_led_pattern *patterns;
int num_patterns;
};
#endif /* __LINUX_LP5521_H */