1 files changed, 55 insertions, 0 deletions

diff --git a/include/asm-arm/arch-ixp2000/gpio.h b/include/asm-arm/arch-ixp2000/gpio.h
new file mode 100644
index 000000000000..84634af5cc64
--- /dev/null
+++ b/include/asm-arm/arch-ixp2000/gpio.h
@@ -0,0 +1,55 @@
+/*
+ * include/asm-arm/arch-ixp2000/ixp2000-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_IXP2000_GPIO_H_
+#define _ASM_ARCH_IXP2000_GPIO_H_
+
+#ifndef __ASSEMBLY__
+#define GPIO_OUT                        0x0
+#define GPIO_IN                         0x80
+
+#define IXP2000_GPIO_LOW                0
+#define IXP2000_GPIO_HIGH               1
+
+#define GPIO_NO_EDGES                   0
+#define GPIO_FALLING_EDGE               1
+#define GPIO_RISING_EDGE                2
+#define GPIO_BOTH_EDGES                 3
+#define GPIO_LEVEL_LOW                  4
+#define GPIO_LEVEL_HIGH                 8
+
+extern void set_GPIO_IRQ_edge(int gpio_nr, int edge);
+extern void set_GPIO_IRQ_level(int gpio_nr, int level);
+extern void gpio_line_config(int line, int style);
+
+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) {
+                ixp_reg_write(IXP2000_GPIO_POSR, BIT(line));
+        } else if (value == IXP2000_GPIO_LOW)
+                ixp_reg_write(IXP2000_GPIO_POCR, BIT(line));
+}
+
+#endif /* !__ASSEMBLY__ */
+#endif /* ASM_ARCH_IXP2000_GPIO_H_ */
+