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linux-next/drivers/leds
History
Javier Martinez Canillas 2d7c22f67d leds: leds-gpio: set devm_gpio_request_one() flags param correctly 
commit a99d76f leds: leds-gpio: use gpio_request_one

changed the leds-gpio driver to use gpio_request_one() instead
of gpio_request() + gpio_direction_output()

Unfortunately, it also made a semantic change that breaks the
leds-gpio driver.

The gpio_request_one() flags parameter was set to:

GPIOF_DIR_OUT | (led_dat->active_low ^ state)

Since GPIOF_DIR_OUT is 0, the final flags value will just be the
XOR'ed value of led_dat->active_low and state.

This value were used to distinguish between HIGH/LOW output initial
level and call gpio_direction_output() accordingly.

With this new semantic gpio_request_one() will take the flags value
of 1 as a configuration of input direction (GPIOF_DIR_IN) and will
call gpio_direction_input() instead of gpio_direction_output().

int gpio_request_one(unsigned gpio, unsigned long flags, const char *label)
{
..
	if (flags & GPIOF_DIR_IN)
		err = gpio_direction_input(gpio);
	else
		err = gpio_direction_output(gpio,
				(flags & GPIOF_INIT_HIGH) ? 1 : 0);
..
}

The right semantic is to evaluate led_dat->active_low ^ state and
set the output initial level explicitly.

Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Reported-by: Arnaud Patard <arnaud.patard@rtp-net.org>
Tested-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
2013-01-02 17:58:41 -08:00
..
dell-led.c drivers/leds: Add module.h to files using it implicitly 2011-10-31 19:31:49 -04:00
Kconfig ARM: kirkwood: DT board setup for Network Space Mini v2 2012-11-21 20:58:49 +00:00
led-class.c leds: led-class: Fix checkpatch warning 2012-11-27 14:49:25 -08:00
led-core.c leds: delay led_set_brightness if stopping soft-blink 2012-09-11 18:32:40 +08:00
led-triggers.c leds: led-triggers: Fix checkpatch warnings 2012-11-27 14:49:30 -08:00
leds-88pm860x.c leds: leds-88pm860x: drop devm_kfree of devm_kzalloc'd data 2012-11-26 14:28:49 -08:00
leds-adp5520.c Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds 2012-12-15 12:52:42 -08:00
leds-asic3.c leds: remove use of __devexit 2012-11-28 12:35:06 -08:00
leds-atmel-pwm.c leds: remove use of __devinit 2012-11-28 12:34:57 -08:00
leds-bd2802.c Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds 2012-12-15 12:52:42 -08:00
leds-blinkm.c leds: remove use of __devexit 2012-11-28 12:35:06 -08:00
leds-clevo-mail.c Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds 2012-12-15 12:52:42 -08:00
leds-cobalt-qube.c Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds 2012-12-15 12:52:42 -08:00
leds-cobalt-raq.c Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds 2012-12-15 12:52:42 -08:00
leds-da903x.c Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds 2012-12-15 12:52:42 -08:00
leds-da9052.c leds: remove use of __devexit 2012-11-28 12:35:06 -08:00
leds-dac124s085.c leds: convert DAC124S085 LED driver to devm_kzalloc() 2012-07-24 07:52:40 +08:00
leds-fsg.c leds: leds-fsg: use devm_ioremap 2012-11-26 14:28:45 -08:00
leds-gpio-register.c leds: provide helper to register "leds-gpio" devices 2011-05-25 08:39:51 -07:00
leds-gpio.c leds: leds-gpio: set devm_gpio_request_one() flags param correctly 2013-01-02 17:58:41 -08:00
leds-hp6xx.c leds: convert led platform drivers to module_platform_driver 2012-01-10 16:30:48 -08:00
leds-lm355x.c Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds 2012-12-15 12:52:42 -08:00
leds-lm3530.c leds: remove use of __devexit 2012-11-28 12:35:06 -08:00
leds-lm3533.c leds: remove use of __devexit 2012-11-28 12:35:06 -08:00
leds-lm3642.c Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds 2012-12-15 12:52:42 -08:00
leds-locomo.c drivers/leds: Add module.h to files using it implicitly 2011-10-31 19:31:49 -04:00
leds-lp3944.c Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds 2012-12-15 12:52:42 -08:00
leds-lp5521.c Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds 2012-12-15 12:52:42 -08:00
leds-lp5523.c Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds 2012-12-15 12:52:42 -08:00
leds-lp8788.c leds: remove use of __devexit 2012-11-28 12:35:06 -08:00
leds-lt3593.c Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds 2012-12-15 12:52:42 -08:00
leds-max8997.c leds: remove use of __devexit 2012-11-28 12:35:06 -08:00
leds-mc13783.c leds: remove use of __devexit 2012-11-28 12:35:06 -08:00
leds-net48xx.c leds: leds-net48xx: Use linux/io.h instead of asm/io.h 2012-11-27 14:49:28 -08:00
leds-netxbig.c Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds 2012-12-15 12:52:42 -08:00
leds-ns2.c Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds 2012-12-15 12:52:42 -08:00
leds-ot200.c leds: remove use of __devexit 2012-11-28 12:35:06 -08:00
leds-pca955x.c Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds 2012-12-15 12:52:42 -08:00
leds-pca9532.c leds: convert PCA9532 LED driver to devm_kzalloc() 2012-07-24 07:52:39 +08:00
leds-pca9633.c leds: remove use of __devexit 2012-11-28 12:35:06 -08:00
leds-pwm.c Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds 2012-12-15 12:52:42 -08:00
leds-rb532.c Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds 2012-12-15 12:52:42 -08:00
leds-regulator.c leds: remove use of __devexit 2012-11-28 12:35:06 -08:00
leds-renesas-tpu.c Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds 2012-12-15 12:52:42 -08:00
leds-s3c24xx.c ARM: samsung: move platform_data definitions 2012-09-19 17:42:18 +02:00
leds-ss4200.c Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds 2012-12-15 12:52:42 -08:00
leds-sunfire.c leds: remove use of __devexit 2012-11-28 12:35:06 -08:00
leds-tca6507.c leds: remove use of __devexit 2012-11-28 12:35:06 -08:00
leds-wm831x-status.c leds: convert wm831x status driver to devm_kzalloc() 2012-01-10 16:30:49 -08:00
leds-wm8350.c leds: leds-wm8350: Use dev_err instead of printk 2012-11-27 14:49:29 -08:00
leds-wrap.c leds: leds-wrap: Use <linux/io.h> instead of <asm/io.h> 2012-11-27 14:49:30 -08:00
leds.h leds: delay led_set_brightness if stopping soft-blink 2012-09-11 18:32:40 +08:00
ledtrig-backlight.c leds: ledtrig-backlight: Fix checkpatch error 2012-11-27 14:49:30 -08:00
ledtrig-cpu.c ledtrig-cpu: kill useless mutex to fix sleep in atomic context 2012-11-11 12:09:43 -08:00
ledtrig-default-on.c leds: Rename led_set_brightness() to __led_set_brightness() 2012-07-24 07:52:34 +08:00
ledtrig-gpio.c leds: ledtrig-gpio: replace strict_strtoul() with kstrtoul() 2012-11-26 14:28:49 -08:00
ledtrig-heartbeat.c leds: Rename led_set_brightness() to __led_set_brightness() 2012-07-24 07:52:34 +08:00
ledtrig-ide-disk.c ledtrig-ide-disk: use generic one-shot blink api 2012-07-24 07:52:34 +08:00
ledtrig-oneshot.c leds: Rename led_brightness_set() to led_set_brightness() 2012-07-24 07:52:34 +08:00
ledtrig-timer.c leds: Rename led_brightness_set() to led_set_brightness() 2012-07-24 07:52:34 +08:00
ledtrig-transient.c leds: Rename led_set_brightness() to __led_set_brightness() 2012-07-24 07:52:34 +08:00
Makefile Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds 2012-10-10 20:14:07 +09:00