[PATCH] ARM: 2744/1: ixp2000 gpio irq support

Patch from Lennert Buytenhek

This patch cleans up the ixp2000 gpio irq code and implements the
set_irq_type method for gpio irqs so that users can select for which
events (falling edge/rising edge/level low/level high) on the gpio
pin they want the corresponding gpio irq to be triggered.

Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Deepak Saxena
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

2 files changed, 13 insertions, 40 deletions

diff --git a/include/asm-arm/arch-ixp2000/gpio.h b/include/asm-arm/arch-ixp2000/gpio.h
index 84634af5cc64..03cbbe1fd9d8 100644
--- a/include/asm-arm/arch-ixp2000/gpio.h
+++ b/include/asm-arm/arch-ixp2000/gpio.h
@@ -1,5 +1,5 @@
 /*
- * include/asm-arm/arch-ixp2000/ixp2000-gpio.h
+ * include/asm-arm/arch-ixp2000/gpio.h
  *
  * Copyright (C) 2002 Intel Corporation.
  *
@@ -16,26 +16,18 @@
  * 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 __ASM_ARCH_GPIO_H
+#define __ASM_ARCH_GPIO_H
 
 #ifndef __ASSEMBLY__
-#define GPIO_OUT                        0x0
-#define GPIO_IN                         0x80
+
+#define GPIO_IN                         0
+#define GPIO_OUT                        1
 
 #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);
+extern void gpio_line_config(int line, int direction);
 
 static inline int gpio_line_get(int line)
 {
@@ -45,11 +37,12 @@ static inline int gpio_line_get(int line)
 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));
+                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_ */
 
+#endif /* ASM_ARCH_IXP2000_GPIO_H_ */
diff --git a/include/asm-arm/arch-ixp2000/platform.h b/include/asm-arm/arch-ixp2000/platform.h
index 901bba6d02b4..52ded516ea5c 100644
--- a/include/asm-arm/arch-ixp2000/platform.h
+++ b/include/asm-arm/arch-ixp2000/platform.h
@@ -138,30 +138,10 @@ struct ixp2000_flash_data {
         unsigned long (*bank_setup)(unsigned long);
 };
 
-/*
- * GPIO helper functions
- */
-#define GPIO_IN         0
-#define GPIO_OUT        1
-
-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_reg_write(IXP2000_GPIO_POSR, (1 << line));
-        else 
-                ixp2000_reg_write(IXP2000_GPIO_POCR, (1 << line));
-}
-
 struct ixp2000_i2c_pins {
         unsigned long sda_pin;
         unsigned long scl_pin;
 };
 
+
 #endif /*  !__ASSEMBLY__ */