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authorLinus Walleij <linus.walleij@linaro.org>2011-08-22 09:49:07 +0200
committerRussell King <rmk+kernel@arm.linux.org.uk>2011-08-22 10:13:44 +0200
commit2428835fc6a579b68dde16d37e0b72ca29259c96 (patch)
tree3118e3f4793d2032c0d469f2f4d6e86992918547 /drivers
parentARM: 7045/1: mach-lpc32xx: break out GPIO driver specifics (diff)
downloadlinux-2428835fc6a579b68dde16d37e0b72ca29259c96.tar.xz
linux-2428835fc6a579b68dde16d37e0b72ca29259c96.zip
ARM: 7049/1: mach-sa1100: move SA1100 GPIO driver to GPIO subsystem
As per example from the other ARM boards, push the SA100 GPIO driver down to the GPIO subsystem so it can be consolidated. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/gpio/Makefile2
-rw-r--r--drivers/gpio/gpio-sa1100.c63
2 files changed, 64 insertions, 1 deletions
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 33e095bdb65c..84bc7389e367 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -45,7 +45,7 @@ obj-$(CONFIG_GPIO_RDC321X) += gpio-rdc321x.o
obj-$(CONFIG_GPIO_PLAT_SAMSUNG) += gpio-plat-samsung.o
obj-$(CONFIG_GPIO_S5PC100) += gpio-s5pc100.o
obj-$(CONFIG_GPIO_S5PV210) += gpio-s5pv210.o
-
+obj-$(CONFIG_ARCH_SA1100) += gpio-sa1100.o
obj-$(CONFIG_GPIO_SCH) += gpio-sch.o
obj-$(CONFIG_GPIO_STMPE) += gpio-stmpe.o
obj-$(CONFIG_GPIO_SX150X) += gpio-sx150x.o
diff --git a/drivers/gpio/gpio-sa1100.c b/drivers/gpio/gpio-sa1100.c
new file mode 100644
index 000000000000..b6c1f6d80649
--- /dev/null
+++ b/drivers/gpio/gpio-sa1100.c
@@ -0,0 +1,63 @@
+/*
+ * 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/gpio.h>
+#include <linux/init.h>
+#include <linux/module.h>
+
+#include <mach/hardware.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);
+}