linux-kernel - [PATCH 13/19] OpenRISC: GPIO

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Message-Id: <1308483825-6023-14-git-send-email-jonas@southpole.se>
Date:	Sun, 19 Jun 2011 13:43:39 +0200
From:	Jonas Bonn <jonas@...thpole.se>
To:	linux-kernel@...r.kernel.org
Cc:	Jonas Bonn <jonas@...thpole.se>
Subject: [PATCH 13/19] OpenRISC: GPIO


Signed-off-by: Jonas Bonn <jonas@...thpole.se>
---
 arch/openrisc/include/asm/gpio.h |   65 ++++++++++++++++++++++++++++++++++++++
 1 files changed, 65 insertions(+), 0 deletions(-)
 create mode 100644 arch/openrisc/include/asm/gpio.h

diff --git a/arch/openrisc/include/asm/gpio.h b/arch/openrisc/include/asm/gpio.h
new file mode 100644
index 0000000..0b0d174
--- /dev/null
+++ b/arch/openrisc/include/asm/gpio.h
@@ -0,0 +1,65 @@
+/*
+ * OpenRISC Linux
+ *
+ * Linux architectural port borrowing liberally from similar works of
+ * others.  All original copyrights apply as per the original source
+ * declaration.
+ *
+ * OpenRISC implementation:
+ * Copyright (C) 2003 Matjaz Breskvar <phoenix@...mi.com>
+ * Copyright (C) 2010-2011 Jonas Bonn <jonas@...thpole.se>
+ * et al.
+ *
+ * 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_OPENRISC_GPIO_H
+#define __ASM_OPENRISC_GPIO_H
+
+#include <linux/errno.h>
+#include <asm-generic/gpio.h>
+
+#ifdef CONFIG_GPIOLIB
+
+/*
+ * OpenRISC (or1k) does not have on-chip GPIO's so there is not really
+ * any standardized implementation that makes sense here.  If passing
+ * through gpiolib becomes a bottleneck then it may make sense, on a
+ * case-by-case basis, to implement these inlined/rapid versions.
+ *
+ * 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);
+}
+
+/*
+ * Not implemented, yet.
+ */
+static inline int gpio_to_irq(unsigned int gpio)
+{
+	return -ENOSYS;
+}
+
+static inline int irq_to_gpio(unsigned int irq)
+{
+	return -EINVAL;
+}
+
+#endif /* CONFIG_GPIOLIB */
+
+#endif /* __ASM_OPENRISC_GPIO_H */
-- 
1.7.4.1

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