[PATCH] SA1100 GPIO wrappers

Arch-neutral GPIO calls for SA-1100.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 81 insertions, 0 deletions

diff --git a/include/asm-arm/arch-sa1100/gpio.h b/include/asm-arm/arch-sa1100/gpio.h
new file mode 100644
index 000000000000..a331fe3f6e48
--- /dev/null
+++ b/include/asm-arm/arch-sa1100/gpio.h
@@ -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@gmail.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