linux-kernel - [patch 2.6.20-rc1 5/6] SA1100 GPIO wrappers

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Date:	Wed, 20 Dec 2006 13:13:21 -0800
From:	David Brownell <david-b@...bell.net>
To:	Linux Kernel list <linux-kernel@...r.kernel.org>
Cc:	Andrew Morton <akpm@...l.org>,
	Andrew Victor <andrew@...people.com>,
	Bill Gatliff <bgat@...lgatliff.com>,
	Haavard Skinnemoen <hskinnemoen@...el.com>, jamey.hicks@...com,
	Kevin Hilman <khilman@...sta.com>,
	Nicolas Pitre <nico@....org>,
	Russell King <rmk@....linux.org.uk>,
	Tony Lindgren <tony@...mide.com>,
	pHilipp Zabel <philipp.zabel@...il.com>
Subject: [patch 2.6.20-rc1 5/6] SA1100 GPIO wrappers

Arch-neutral GPIO calls for SA-1100.

From: Philipp Zabel <philipp.zabel@...il.com>

Index: at91/include/asm-arm/arch-sa1100/gpio.h
===================================================================
--- /dev/null	1970-01-01 00:00:00.000000000 +0000
+++ at91/include/asm-arm/arch-sa1100/gpio.h	2006-12-19 02:09:08.000000000 -0800
@@ -0,0 +1,81 @@
+/*
+ * linux/include/asm-arm/arch-pxa/gpio.h
+ *
+ * SA1100 GPIO wrappers for arch-neutral GPIO calls
+ *
+ * Written by Philipp Zabel <philipp.zabel@...il.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#ifndef __ASM_ARCH_SA1100_GPIO_H
+#define __ASM_ARCH_SA1100_GPIO_H
+
+#include <asm/arch/SA-1100.h>
+#include <asm/arch/irqs.h>
+#include <asm/arch/hardware.h>
+
+#include <asm/errno.h>
+
+static inline int gpio_request(unsigned gpio, const char *label)
+{
+	return 0;
+}
+
+static inline void gpio_free(unsigned gpio)
+{
+	return;
+}
+
+static inline int gpio_direction_input(unsigned gpio)
+{
+	if (gpio > GPIO_MAX)
+		return -EINVAL;
+	GPDR = (GPDR_In << gpio) 0
+}
+
+static inline int gpio_direction_output(unsigned gpio)
+{
+	if (gpio > GPIO_MAX)
+		return -EINVAL;
+	GPDR = (GPDR_Out << gpio) 0
+}
+
+#define gpio_get_value(gpio) \
+	(GPLR & GPIO_GPIO(gpio))
+
+#define gpio_set_value(gpio,value) \
+	((value) ? (GPSR = GPIO_GPIO(gpio)) : (GPCR(gpio) = GPIO_GPIO(gpio)))
+
+#include <asm-generic/gpio.h>			/* cansleep wrappers */
+
+static inline unsigned gpio_to_irq(unsigned gpio)
+{
+	if (gpio < 11)
+		return IRQ_GPIO0 + gpio;
+	else
+		return IRQ_GPIO11 - 11 + gpio;
+}
+
+static inline unsigned irq_to_gpio(unsigned irq)
+{
+	if (irq < IRQ_GPIO11_27)
+		return irq - IRQ_GPIO0;
+	else
+		return irq - IRQ_GPIO11 + 11;
+}
+
+#endif
-
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