MXC arch: Add gpio support for the whole platform

This patch bases on the one from Daniel Mack. The most important change to
Daniel's patch is to be more generic. This gpio routine supports at least
the i.MX27 and i.MX31 processors.

Signed-off-by: Juergen Beisert <j.beisert@pengutronix.de>
Acked-by: Daniel Mack <daniel@caiaq.de>

1 files changed, 42 insertions, 0 deletions

diff --git a/include/asm-arm/arch-mxc/gpio.h b/include/asm-arm/arch-mxc/gpio.h
new file mode 100644
index 000000000000..d393e15f5a6b
--- /dev/null
+++ b/include/asm-arm/arch-mxc/gpio.h
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2007 Freescale Semiconductor, Inc. All Rights Reserved.
+ * Copyright 2008 Juergen Beisert, kernel@pengutronix.de
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
+#ifndef __ASM_ARCH_MXC_GPIO_H__
+#define __ASM_ARCH_MXC_GPIO_H__
+
+#include <asm/hardware.h>
+#include <asm-generic/gpio.h>
+
+/* use gpiolib dispatchers */
+#define gpio_get_value          __gpio_get_value
+#define gpio_set_value          __gpio_set_value
+#define gpio_cansleep           __gpio_cansleep
+
+#define gpio_to_irq(gpio)       (MXC_MAX_INT_LINES + (gpio))
+#define irq_to_gpio(irq)        ((irq) - MXC_MAX_INT_LINES)
+
+struct mxc_gpio_port {
+        void __iomem *base;
+        int irq;
+        int virtual_irq_start;
+        struct gpio_chip chip;
+};
+
+int mxc_gpio_init(struct mxc_gpio_port*, int);
+
+#endif