[PATCH] PXA GPIO wrappers

Arch-neutral GPIO calls for PXA.

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, 72 insertions, 0 deletions

diff --git a/include/asm-arm/arch-pxa/gpio.h b/include/asm-arm/arch-pxa/gpio.h
new file mode 100644
index 000000000000..e67c23821017
--- /dev/null
+++ b/include/asm-arm/arch-pxa/gpio.h
@@ -0,0 +1,72 @@
+/*
+ * linux/include/asm-arm/arch-pxa/gpio.h
+ *
+ * PXA 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_PXA_GPIO_H
+#define __ASM_ARCH_PXA_GPIO_H
+
+#include <asm/arch/pxa-regs.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 > PXA_LAST_GPIO)
+                return -EINVAL;
+        pxa_gpio_mode(gpio | GPIO_IN);
+}
+
+static inline int gpio_direction_output(unsigned gpio)
+{
+        if (gpio > PXA_LAST_GPIO)
+                return -EINVAL;
+        pxa_gpio_mode(gpio | GPIO_OUT);
+}
+
+/* REVISIT these macros are correct, but suffer code explosion
+ * for non-constant parameters.  Provide out-line versions too.
+ */
+#define gpio_get_value(gpio) \
+        (GPLR(gpio) & GPIO_bit(gpio))
+
+#define gpio_set_value(gpio,value) \
+        ((value) ? (GPSR(gpio) = GPIO_bit(gpio)):(GPCR(gpio) = GPIO_bit(gpio)))
+
+#include <asm-generic/gpio.h>                   /* cansleep wrappers */
+
+#define gpio_to_irq(gpio)       IRQ_GPIO(gpio)
+#define irq_to_gpio(irq)        IRQ_TO_GPIO(irq)
+
+
+#endif