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authorCédric Le Goater <clg@kaod.org>2017-08-08 16:42:39 +0300
committerJacek Anaszewski <jacek.anaszewski@gmail.com>2017-08-14 23:22:37 +0300
commit561099a1a2e992a482a8318c0c9c5af26222e5cd (patch)
tree1fab407e2140c2efdb5e005a4302d576d6613d33 /include/dt-bindings
parent91940bb4ca7b7f1b5426cc14bdbd0c7f8347683f (diff)
downloadlinux-561099a1a2e992a482a8318c0c9c5af26222e5cd.tar.xz
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 'include/dt-bindings')
-rw-r--r--include/dt-bindings/leds/leds-pca955x.h16
1 files changed, 16 insertions, 0 deletions
diff --git a/include/dt-bindings/leds/leds-pca955x.h b/include/dt-bindings/leds/leds-pca955x.h
new file mode 100644
index 000000000000..78cb7e979de7
--- /dev/null
+++ b/include/dt-bindings/leds/leds-pca955x.h
@@ -0,0 +1,16 @@
+/*
+ * This header provides constants for pca955x LED bindings.
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#ifndef _DT_BINDINGS_LEDS_PCA955X_H
+#define _DT_BINDINGS_LEDS_PCA955X_H
+
+#define PCA955X_TYPE_NONE 0
+#define PCA955X_TYPE_LED 1
+#define PCA955X_TYPE_GPIO 2
+
+#endif /* _DT_BINDINGS_LEDS_PCA955X_H */