diff options
| author | Cédric Le Goater <clg@kaod.org> | 2017-08-08 15:42:39 +0200 |
|---|---|---|
| committer | Jacek Anaszewski <jacek.anaszewski@gmail.com> | 2017-08-14 22:22:37 +0200 |
| commit | 561099a1a2e992a482a8318c0c9c5af26222e5cd (patch) | |
| tree | 1fab407e2140c2efdb5e005a4302d576d6613d33 /drivers/leds/Kconfig | |
| parent | 91940bb4ca7b7f1b5426cc14bdbd0c7f8347683f (diff) | |
| download | linux-561099a1a2e992a482a8318c0c9c5af26222e5cd.tar.bz2 | |
leds: pca955x: add GPIO support
The PCA955x family of chips are I2C LED blinkers whose pins not used
to control LEDs can be used as general purpose I/Os (GPIOs).
The following adds such a support by defining different operation
modes for the pins (See bindings documentation for more details). The
pca955x driver is then extended with a gpio_chip when some of pins are
operating as GPIOs. The default operating mode is to behave as a LED.
The GPIO support is conditioned by CONFIG_LEDS_PCA955X_GPIO.
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
Diffstat (limited to 'drivers/leds/Kconfig')
| -rw-r--r-- | drivers/leds/Kconfig | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig index 594b24d410c3..3013cd35c65e 100644 --- a/drivers/leds/Kconfig +++ b/drivers/leds/Kconfig @@ -377,6 +377,17 @@ config LEDS_PCA955X LED driver chips accessed via the I2C bus. Supported devices include PCA9550, PCA9551, PCA9552, and PCA9553. +config LEDS_PCA955X_GPIO + bool "Enable GPIO support for PCA955X" + depends on LEDS_PCA955X + depends on GPIOLIB + help + Allow unused pins on PCA955X to be used as gpio. + + To use a pin as gpio the pin type should be set to + PCA955X_TYPE_GPIO in the device tree. + + config LEDS_PCA963X tristate "LED support for PCA963x I2C chip" depends on LEDS_CLASS |