Add and use meaningful macro names for OMAP4 GPIO addresses, and add a
comment to explain the 0x100 offset for OMAP4.
Signed-off-by: Robert P. J. Day <rpjday@xxxxxxxxxxxxxx>
---
diff --git a/arch/arm/mach-omap/include/mach/omap4-silicon.h b/arch/arm/mach-omap/include/mach/omap4-silicon.h
index 71ffe39..008eafb 100644
--- a/arch/arm/mach-omap/include/mach/omap4-silicon.h
+++ b/arch/arm/mach-omap/include/mach/omap4-silicon.h
@@ -101,6 +101,21 @@
#define OMAP44XX_MMC4_BASE (OMAP44XX_L4_PER_BASE + 0x0D1100)
#define OMAP44XX_MMC5_BASE (OMAP44XX_L4_PER_BASE + 0x0D5100)
+/* GPIO
+ *
+ * Note that, while the GPIO controller is the same as on an OMAP3,
+ * the base address has an additional offset of 0x100, which you can
+ * see being added here so that the OMAP_GPIO_* macros you see in
+ * mach-omap/gpio.c don't need to be adjusted based on the platform.
+ */
+
+#define OMAP44XX_GPIO1_BASE (OMAP44XX_L4_WKUP_BASE + 0x10100)
+#define OMAP44XX_GPIO2_BASE (OMAP44XX_L4_PER_BASE + 0x55100)
+#define OMAP44XX_GPIO3_BASE (OMAP44XX_L4_PER_BASE + 0x57100)
+#define OMAP44XX_GPIO4_BASE (OMAP44XX_L4_PER_BASE + 0x59100)
+#define OMAP44XX_GPIO5_BASE (OMAP44XX_L4_PER_BASE + 0x5B100)
+#define OMAP44XX_GPIO6_BASE (OMAP44XX_L4_PER_BASE + 0x5D100)
+
/* GPMC */
#define OMAP_GPMC_BASE 0x50000000
diff --git a/arch/arm/mach-omap/omap4_generic.c b/arch/arm/mach-omap/omap4_generic.c
index c756664..dc1dbae 100644
--- a/arch/arm/mach-omap/omap4_generic.c
+++ b/arch/arm/mach-omap/omap4_generic.c
@@ -611,17 +611,17 @@ const struct gpmc_config omap4_nand_cfg = {
static int omap4_gpio_init(void)
{
- add_generic_device("omap-gpio", 0, NULL, 0x4a310100,
+ add_generic_device("omap-gpio", 0, NULL, OMAP44XX_GPIO1_BASE,
0xf00, IORESOURCE_MEM, NULL);
- add_generic_device("omap-gpio", 1, NULL, 0x48055100,
+ add_generic_device("omap-gpio", 1, NULL, OMAP44XX_GPIO2_BASE,
0xf00, IORESOURCE_MEM, NULL);
- add_generic_device("omap-gpio", 2, NULL, 0x48057100,
+ add_generic_device("omap-gpio", 2, NULL, OMAP44XX_GPIO3_BASE,
0xf00, IORESOURCE_MEM, NULL);
- add_generic_device("omap-gpio", 3, NULL, 0x48059100,
+ add_generic_device("omap-gpio", 3, NULL, OMAP44XX_GPIO4_BASE,
0xf00, IORESOURCE_MEM, NULL);
- add_generic_device("omap-gpio", 4, NULL, 0x4805b100,
+ add_generic_device("omap-gpio", 4, NULL, OMAP44XX_GPIO5_BASE,
0xf00, IORESOURCE_MEM, NULL);
- add_generic_device("omap-gpio", 5, NULL, 0x4805d100,
+ add_generic_device("omap-gpio", 5, NULL, OMAP44XX_GPIO6_BASE,
0xf00, IORESOURCE_MEM, NULL);
return 0;
--
========================================================================
Robert P. J. Day Ottawa, Ontario, CANADA
http://crashcourse.ca
Twitter: http://twitter.com/rpjday
LinkedIn: http://ca.linkedin.com/in/rpjday
========================================================================
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