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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>
16 lines
482 B
C
16 lines
482 B
C
/*
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* This header provides constants for pca955x LED bindings.
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*
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* This file is licensed under the terms of the GNU General Public
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* License version 2. This program is licensed "as is" without any
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* warranty of any kind, whether express or implied.
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*/
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#ifndef _DT_BINDINGS_LEDS_PCA955X_H
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#define _DT_BINDINGS_LEDS_PCA955X_H
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#define PCA955X_TYPE_NONE 0
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#define PCA955X_TYPE_LED 1
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#define PCA955X_TYPE_GPIO 2
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#endif /* _DT_BINDINGS_LEDS_PCA955X_H */
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