[ARM] 4590/1: ns9xxx: add gpio handling functions

This implementation conforms to the general GPIO API
introduced in 2.6.21.

This patch was signed-of by David Brownell before I exported the functions
using EXPORT_SYMBOL.

Signed-off-by: Uwe Kleine-König <ukleinek@informatik.uni-freiburg.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 47 insertions, 0 deletions

diff --git a/include/asm-arm/arch-ns9xxx/gpio.h b/include/asm-arm/arch-ns9xxx/gpio.h
new file mode 100644
index 000000000000..adbca08583c0
--- /dev/null
+++ b/include/asm-arm/arch-ns9xxx/gpio.h
@@ -0,0 +1,47 @@
+/*
+ * include/asm-arm/arch-ns9xxx/gpio.h
+ *
+ * Copyright (C) 2007 by Digi International Inc.
+ * All rights reserved.
+ *
+ * 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.
+*/
+#ifndef __ASM_ARCH_GPIO_H
+#define __ASM_ARCH_GPIO_H
+
+#include <asm/errno.h>
+
+int gpio_request(unsigned gpio, const char *label);
+
+void gpio_free(unsigned gpio);
+
+int ns9xxx_gpio_configure(unsigned gpio, int inv, int func);
+
+int gpio_direction_input(unsigned gpio);
+
+int gpio_direction_output(unsigned gpio, int value);
+
+int gpio_get_value(unsigned gpio);
+
+void gpio_set_value(unsigned gpio, int value);
+
+/*
+ * ns9xxx can use gpio pins to trigger an irq, but it's not generic
+ * enough to be supported by the gpio_to_irq/irq_to_gpio interface
+ */
+static inline int gpio_to_irq(unsigned gpio)
+{
+        return -EINVAL;
+}
+
+static inline int irq_to_gpio(unsigned irq)
+{
+        return -EINVAL;
+}
+
+/* get the cansleep() stubs */
+#include <asm-generic/gpio.h>
+
+#endif /* ifndef __ASM_ARCH_GPIO_H */