[IA64] Hook up gpiolib support

Allow people to use gpiolib on ia64, mostly for build coverage as it
seems more useful to standardise on availablity of the API than handle
it being optional.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

2 files changed, 59 insertions, 0 deletions

diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index 38280ef4a2af..578701ea03d4 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -27,6 +27,7 @@ config IA64
         select GENERIC_PENDING_IRQ if SMP
         select IRQ_PER_CPU
         select GENERIC_IRQ_SHOW
+        select ARCH_WANT_OPTIONAL_GPIOLIB
         default y
         help
           The Itanium Processor Family is Intel's 64-bit successor to
@@ -89,6 +90,9 @@ config GENERIC_TIME_VSYSCALL
 config HAVE_SETUP_PER_CPU_AREA
         def_bool y
 
+config GENERIC_GPIO
+        def_bool y
+
 config DMI
         bool
         default y
diff --git a/arch/ia64/include/asm/gpio.h b/arch/ia64/include/asm/gpio.h
new file mode 100644
index 000000000000..590a20debc4e
--- /dev/null
+++ b/arch/ia64/include/asm/gpio.h
@@ -0,0 +1,55 @@
+/*
+ * Generic GPIO API implementation for IA-64.
+ *
+ * A stright copy of that for PowerPC which was:
+ *
+ * Copyright (c) 2007-2008  MontaVista Software, Inc.
+ *
+ * Author: Anton Vorontsov <avorontsov@ru.mvista.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.
+ */
+
+#ifndef _ASM_IA64_GPIO_H
+#define _ASM_IA64_GPIO_H
+
+#include <linux/errno.h>
+#include <asm-generic/gpio.h>
+
+#ifdef CONFIG_GPIOLIB
+
+/*
+ * We don't (yet) implement inlined/rapid versions for on-chip gpios.
+ * Just call gpiolib.
+ */
+static inline int gpio_get_value(unsigned int gpio)
+{
+        return __gpio_get_value(gpio);
+}
+
+static inline void gpio_set_value(unsigned int gpio, int value)
+{
+        __gpio_set_value(gpio, value);
+}
+
+static inline int gpio_cansleep(unsigned int gpio)
+{
+        return __gpio_cansleep(gpio);
+}
+
+static inline int gpio_to_irq(unsigned int gpio)
+{
+        return __gpio_to_irq(gpio);
+}
+
+static inline int irq_to_gpio(unsigned int irq)
+{
+        return -EINVAL;
+}
+
+#endif /* CONFIG_GPIOLIB */
+
+#endif /* _ASM_IA64_GPIO_H */