summaryrefslogtreecommitdiff
path: root/arch/arm/mach-davinci/include/mach/gpio.h
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/mach-davinci/include/mach/gpio.h')
-rw-r--r--arch/arm/mach-davinci/include/mach/gpio.h27
1 files changed, 13 insertions, 14 deletions
diff --git a/arch/arm/mach-davinci/include/mach/gpio.h b/arch/arm/mach-davinci/include/mach/gpio.h
index b456f079f43f..efe3281364e6 100644
--- a/arch/arm/mach-davinci/include/mach/gpio.h
+++ b/arch/arm/mach-davinci/include/mach/gpio.h
@@ -15,9 +15,11 @@
#include <linux/io.h>
#include <asm-generic/gpio.h>
-#include <mach/hardware.h>
+
#include <mach/irqs.h>
+#define DAVINCI_GPIO_BASE 0x01C67000
+
/*
* basic gpio routines
*
@@ -26,23 +28,18 @@
* go through boot loaders.
*
* the gpio clock will be turned on when gpios are used, and you may also
- * need to pay attention to PINMUX0 and PINMUX1 to be sure those pins are
+ * need to pay attention to PINMUX registers to be sure those pins are
* used as gpios, not with other peripherals.
*
* On-chip GPIOs are numbered 0..(DAVINCI_N_GPIO-1). For documentation,
- * and maybe for later updates, code should write GPIO(N) or:
- * - GPIOV18(N) for 1.8V pins, N in 0..53; same as GPIO(0)..GPIO(53)
- * - GPIOV33(N) for 3.3V pins, N in 0..17; same as GPIO(54)..GPIO(70)
- *
- * For GPIO IRQs use gpio_to_irq(GPIO(N)) or gpio_to_irq(GPIOV33(N)) etc
- * for now, that's != GPIO(N)
+ * and maybe for later updates, code may write GPIO(N). These may be
+ * all 1.8V signals, all 3.3V ones, or a mix of the two. A given chip
+ * may not support all the GPIOs in that range.
*
* GPIOs can also be on external chips, numbered after the ones built-in
* to the DaVinci chip. For now, they won't be usable as IRQ sources.
*/
-#define GPIO(X) (X) /* 0 <= X <= 70 */
-#define GPIOV18(X) (X) /* 1.8V i/o; 0 <= X <= 53 */
-#define GPIOV33(X) ((X)+54) /* 3.3V i/o; 0 <= X <= 17 */
+#define GPIO(X) (X) /* 0 <= X <= (DAVINCI_N_GPIO - 1) */
struct gpio_controller {
u32 dir;
@@ -71,12 +68,14 @@ __gpio_to_controller(unsigned gpio)
{
void *__iomem ptr;
- if (gpio < 32)
+ if (gpio < 32 * 1)
ptr = IO_ADDRESS(DAVINCI_GPIO_BASE + 0x10);
- else if (gpio < 64)
+ else if (gpio < 32 * 2)
ptr = IO_ADDRESS(DAVINCI_GPIO_BASE + 0x38);
- else if (gpio < DAVINCI_N_GPIO)
+ else if (gpio < 32 * 3)
ptr = IO_ADDRESS(DAVINCI_GPIO_BASE + 0x60);
+ else if (gpio < 32 * 4)
+ ptr = IO_ADDRESS(DAVINCI_GPIO_BASE + 0x88);
else
ptr = NULL;
return ptr;