Merge branch 'linus' into x86/doc

1 files changed, 48 insertions, 0 deletions

diff --git a/arch/arm/mach-ixp2000/include/mach/gpio.h b/arch/arm/mach-ixp2000/include/mach/gpio.h
new file mode 100644
index 000000000000..4a88d2c33dac
--- /dev/null
+++ b/arch/arm/mach-ixp2000/include/mach/gpio.h
@@ -0,0 +1,48 @@
+/*
+ * arch/arm/mach-ixp2000/include/mach/gpio.h
+ *
+ * Copyright (C) 2002 Intel Corporation.
+ *
+ * This program is free software, you can redistribute it and/or modify 
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+/*
+ * IXP2000 GPIO in/out, edge/level detection for IRQs:
+ * IRQs are generated on Falling-edge, Rising-Edge, Level-low, Level-High
+ * or both Falling-edge and Rising-edge.  
+ * This must be called *before* the corresponding IRQ is registerd.
+ * Use this instead of directly setting the GPIO registers.
+ * GPIOs may also be used as GPIOs (e.g. for emulating i2c/smb)
+ */
+#ifndef __ASM_ARCH_GPIO_H
+#define __ASM_ARCH_GPIO_H
+
+#ifndef __ASSEMBLY__
+
+#define GPIO_IN				0
+#define GPIO_OUT			1
+
+#define IXP2000_GPIO_LOW		0
+#define IXP2000_GPIO_HIGH		1
+
+extern void gpio_line_config(int line, int direction);
+
+static inline int gpio_line_get(int line)
+{
+	return (((*IXP2000_GPIO_PLR) >> line) & 1);
+}
+
+static inline void gpio_line_set(int line, int value)
+{
+	if (value == IXP2000_GPIO_HIGH) {
+		ixp2000_reg_write(IXP2000_GPIO_POSR, 1 << line);
+	} else if (value == IXP2000_GPIO_LOW) {
+		ixp2000_reg_write(IXP2000_GPIO_POCR, 1 << line);
+	}
+}
+
+#endif /* !__ASSEMBLY__ */
+
+#endif /* ASM_ARCH_IXP2000_GPIO_H_ */