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authorDmitry Baryshkov <dbaryshkov@gmail.com>2008-04-10 13:31:47 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2008-04-10 15:31:37 +0100
commit45528e38173e7d8c03821850e8fd1ddbf16f2b3d (patch)
tree96ed1a1e340bb28e47d8b4b9e1de4b42e0d12bd6 /arch/arm/mach-sa1100/gpio.c
parentc353faa4b2abd8d5142640b880532c97a0807460 (diff)
downloadlinux-2.6.34-ux500-45528e38173e7d8c03821850e8fd1ddbf16f2b3d.tar.gz
[ARM] 4961/1: gpiolib support for SA-1100 architecture
This adds gpiolib support for the SA-1100 arch: - Move all GPIO API functions from generic.c into gpio.c - Convert all gpio functions into gpiolib callbacks. Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mach-sa1100/gpio.c')
-rw-r--r--arch/arm/mach-sa1100/gpio.c65
1 files changed, 65 insertions, 0 deletions
diff --git a/arch/arm/mach-sa1100/gpio.c b/arch/arm/mach-sa1100/gpio.c
new file mode 100644
index 00000000000..372f1f4f54a
--- /dev/null
+++ b/arch/arm/mach-sa1100/gpio.c
@@ -0,0 +1,65 @@
+/*
+ * linux/arch/arm/mach-sa1100/gpio.c
+ *
+ * Generic SA-1100 GPIO handling
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+
+#include <asm/gpio.h>
+#include <asm/hardware.h>
+#include "generic.h"
+
+static int sa1100_gpio_get(struct gpio_chip *chip, unsigned offset)
+{
+ return GPLR & GPIO_GPIO(offset);
+}
+
+static void sa1100_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
+{
+ if (value)
+ GPSR = GPIO_GPIO(offset);
+ else
+ GPCR = GPIO_GPIO(offset);
+}
+
+static int sa1100_direction_input(struct gpio_chip *chip, unsigned offset)
+{
+ unsigned long flags;
+
+ local_irq_save(flags);
+ GPDR &= ~GPIO_GPIO(offset);
+ local_irq_restore(flags);
+ return 0;
+}
+
+static int sa1100_direction_output(struct gpio_chip *chip, unsigned offset, int value)
+{
+ unsigned long flags;
+
+ local_irq_save(flags);
+ sa1100_gpio_set(chip, offset, value);
+ GPDR |= GPIO_GPIO(offset);
+ local_irq_restore(flags);
+ return 0;
+}
+
+static struct gpio_chip sa1100_gpio_chip = {
+ .label = "gpio",
+ .direction_input = sa1100_direction_input,
+ .direction_output = sa1100_direction_output,
+ .set = sa1100_gpio_set,
+ .get = sa1100_gpio_get,
+ .base = 0,
+ .ngpio = GPIO_MAX + 1,
+};
+
+void __init sa1100_init_gpio(void)
+{
+ gpiochip_add(&sa1100_gpio_chip);
+}