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drivers/leds/leds-pca9532.c: add gpio capability

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Allow unused leds on pca9532 to be used as gpio.  The board I am working
on now has no less than 6 pca9532 chips.  One chips is used for only leds,
one has 14 leds and 2 gpio and the rest of the chips are gpio only.

There is also one board in mainline which could use this capabilty;
arch/arm/mach-iop32x/n2100.c
 232         {       .type = PCA9532_TYPE_NONE }, /* power OFF gpio */
 233         {       .type = PCA9532_TYPE_NONE }, /* reset gpio */

This patch defines a new pin type, PCA9532_TYPE_GPIO, and registers a
gpiochip if any pin has this type set.  The gpio will registers all chip
pins but will filter on gpio_request.

[randy.dunlap@oracle.com: fix build when GPIOLIB is not enabled]
Signed-off-by: Joachim Eastwood <joachim.eastwood@jotron.com>
Reviewed-by: Wolfram Sang <w.sang@pengutronix.de>
Reviewed-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Jan Weitzel <j.weitzel@phytec.de>
Cc: Juergen Kilb <j.kilb@phytec.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Joachim Eastwood 2011-05-24 17:13:23 -07:00 • committed by Linus Torvalds
commit 3c1ab50d0a
3 changed files with 122 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

3
include/linux/leds-pca9532.h
View file

@ -25,7 +25,7 @@ enum pca9532_state {
};
enum pca9532_type { PCA9532_TYPE_NONE, PCA9532_TYPE_LED,
PCA9532_TYPE_N2100_BEEP };
PCA9532_TYPE_N2100_BEEP, PCA9532_TYPE_GPIO };
struct pca9532_led {
u8 id;
@ -41,6 +41,7 @@ struct pca9532_platform_data {
struct pca9532_led leds[16];
u8 pwm[2];
u8 psc[2];
int gpio_base;
};
#endif /* __LINUX_PCA9532_H */