X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=arch%2Farm%2Fmach-at91%2Fgpio.c;h=44211a0af19a805fd81a0d1a5783f07ed4db958f;hb=0ce3c83a9c22f59937b86c80b478dfbffe54dbab;hp=9b7495cd555d4b029c2a2e46315d7a560a2388d0;hpb=f69eda00d4e9808f0ddc88826278f93512cd2c98;p=pandora-kernel.git

diff --git a/arch/arm/mach-at91/gpio.c b/arch/arm/mach-at91/gpio.c
index 9b7495cd555d..44211a0af19a 100644
--- a/arch/arm/mach-at91/gpio.c
+++ b/arch/arm/mach-at91/gpio.c
@@ -64,6 +64,24 @@ static inline unsigned pin_to_mask(unsigned pin)
  */
 
 
+/*
+ * mux the pin to the "GPIO" peripheral role.
+ */
+int __init_or_module at91_set_GPIO_periph(unsigned pin, int use_pullup)
+{
+	void __iomem	*pio = pin_to_controller(pin);
+	unsigned	mask = pin_to_mask(pin);
+
+	if (!pio)
+		return -EINVAL;
+	__raw_writel(mask, pio + PIO_IDR);
+	__raw_writel(mask, pio + (use_pullup ? PIO_PUER : PIO_PUDR));
+	__raw_writel(mask, pio + PIO_PER);
+	return 0;
+}
+EXPORT_SYMBOL(at91_set_GPIO_periph);
+
+
 /*
  * mux the pin to the "A" internal peripheral role.
  */
@@ -181,6 +199,36 @@ EXPORT_SYMBOL(at91_set_multi_drive);
 
 /*--------------------------------------------------------------------------*/
 
+/* new-style GPIO calls; these expect at91_set_GPIO_periph to have been
+ * called, and maybe at91_set_multi_drive() for putout pins.
+ */
+
+int gpio_direction_input(unsigned pin)
+{
+	void __iomem	*pio = pin_to_controller(pin);
+	unsigned	mask = pin_to_mask(pin);
+
+	if (!pio || !(__raw_readl(pio + PIO_PSR) & mask))
+		return -EINVAL;
+	__raw_writel(mask, pio + PIO_ODR);
+	return 0;
+}
+EXPORT_SYMBOL(gpio_direction_input);
+
+int gpio_direction_output(unsigned pin)
+{
+	void __iomem	*pio = pin_to_controller(pin);
+	unsigned	mask = pin_to_mask(pin);
+
+	if (!pio || !(__raw_readl(pio + PIO_PSR) & mask))
+		return -EINVAL;
+	__raw_writel(mask, pio + PIO_OER);
+	return 0;
+}
+EXPORT_SYMBOL(gpio_direction_output);
+
+/*--------------------------------------------------------------------------*/
+
 /*
  * assuming the pin is muxed as a gpio output, set its value.
  */