These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / include / dt-bindings / gpio / gpio.h

diff --git a/kernel/include/dt-bindings/gpio/gpio.h b/kernel/include/dt-bindings/gpio/gpio.h
index e6b1e0a..c673d2c 100644 (file)
--- a/kernel/include/dt-bindings/gpio/gpio.h
+++ b/kernel/include/dt-bindings/gpio/gpio.h
@@ -9,7 +9,19 @@
 #ifndef _DT_BINDINGS_GPIO_GPIO_H
 #define _DT_BINDINGS_GPIO_GPIO_H
 
+/* Bit 0 express polarity */
 #define GPIO_ACTIVE_HIGH 0
 #define GPIO_ACTIVE_LOW 1
 
+/* Bit 1 express single-endedness */
+#define GPIO_PUSH_PULL 0
+#define GPIO_SINGLE_ENDED 2
+
+/*
+ * Open Drain/Collector is the combination of single-ended active low,
+ * Open Source/Emitter is the combination of single-ended active high.
+ */
+#define GPIO_OPEN_DRAIN (GPIO_SINGLE_ENDED | GPIO_ACTIVE_LOW)
+#define GPIO_OPEN_SOURCE (GPIO_SINGLE_ENDED | GPIO_ACTIVE_HIGH)
+
 #endif