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authorIngo Molnar <mingo@elte.hu>2008-08-14 14:58:01 +0200
committerIngo Molnar <mingo@elte.hu>2008-08-14 14:58:01 +0200
commit51ca3c679194e7435c25b8e77b0a73c597e41ae9 (patch)
treea681dca369607ab0f371d5246b0f75140b860a8a /arch/arm/mach-ixp2000/include/mach/gpio.h
parentb55793f7528ce1b73c25b3ac8a86a6cda2a0f9a4 (diff)
parentb635acec48bcaa9183fcbf4e3955616b0d4119b5 (diff)
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Merge branch 'linus' into x86/core
Conflicts: arch/x86/kernel/genapic_64.c include/asm-x86/kvm_host.h Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/arm/mach-ixp2000/include/mach/gpio.h')
-rw-r--r--arch/arm/mach-ixp2000/include/mach/gpio.h48
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 00000000000..4a88d2c33da
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+++ 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_ */