[PATCH v3] GPIO: Add support for GPIO on CLPS711X-target platform

The CLPS711X CPUs provide some GPIOs for use in the system. This
driver provides support for these via gpiolib. Due to platform
limitations, driver does not support interrupts, only inputs and
outputs.

Signed-off-by: Alexander Shiyan <redacted>
---
 arch/arm/Kconfig                           |    1 +
 arch/arm/mach-clps711x/include/mach/gpio.h |   27 +++++
 drivers/gpio/Kconfig                       |    4 +
 drivers/gpio/Makefile                      |    1 +
 drivers/gpio/gpio-clps711x.c               |  152 ++++++++++++++++++++++++++++
 5 files changed, 185 insertions(+), 0 deletions(-)
 create mode 100644 arch/arm/mach-clps711x/include/mach/gpio.h
 create mode 100644 drivers/gpio/gpio-clps711x.c

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 2f88d8d..e73bf9d 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig

@@ -384,6 +384,7 @@ config ARCH_CLPS711X
 	bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
 	select CPU_ARM720T
 	select ARCH_USES_GETTIMEOFFSET
+	select ARCH_REQUIRE_GPIOLIB
 	select NEED_MACH_MEMORY_H
 	help
 	  Support for Cirrus Logic 711x/721x/731x based boards.

diff --git a/arch/arm/mach-clps711x/include/mach/gpio.h b/arch/arm/mach-clps711x/include/mach/gpio.h
new file mode 100644
index 0000000..cbcc985
--- /dev/null
+++ b/arch/arm/mach-clps711x/include/mach/gpio.h

@@ -0,0 +1,27 @@
+/*
+ *  This file contains the CLPS711X GPIO definitions.
+ *
+ *  Copyright (C) 2012 Alexander Shiyan <shc_work@mail.ru>
+ *
+ * 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.
+ */
+
+/* Simple helper for convert port & pin to GPIO number */
+#define CLPS711X_GPIO(port, bit)	((port) * 8 + (bit))
+
+/* Temporaty definitions for GPIO-ports */
+/* Will be removed after remove clps_read(write) macros */
+#include <mach/hardware.h>
+#define _PADR	(CLPS711X_VIRT_BASE + PADR)
+#define _PBDR	(CLPS711X_VIRT_BASE + PBDR)
+#define _PCDR	(CLPS711X_VIRT_BASE + PCDR)
+#define _PDDR	(CLPS711X_VIRT_BASE + PDDR)
+#define _PADDR	(CLPS711X_VIRT_BASE + PADDR)
+#define _PBDDR	(CLPS711X_VIRT_BASE + PBDDR)
+#define _PCDDR	(CLPS711X_VIRT_BASE + PCDDR)
+#define _PDDDR	(CLPS711X_VIRT_BASE + PDDDR)
+#define _PEDR	(CLPS711X_VIRT_BASE + PEDR)
+#define _PEDDR	(CLPS711X_VIRT_BASE + PEDDR)