ARM: 7083/1: rewrite U300 GPIO to use gpiolib

This rewrites the U300 GPIO so as to use gpiolib and
struct gpio_chip instead of just generic GPIO, hiding
all the platform specifics and passing in GPIO chip
variant as platform data at runtime instead of the
compiletime kludges.

As a result <mach/gpio.h> is now empty for U300 and
using just defaults.

Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Debian kernel maintainers <debian-kernel@lists.debian.org>
Cc: Arnaud Patard <arnaud.patard@rtp-net.org>
Reported-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 28 insertions, 3 deletions

diff --git a/arch/arm/mach-u300/core.c b/arch/arm/mach-u300/core.c
index 399c89f14df..fd435f44098 100644
--- a/arch/arm/mach-u300/core.c
+++ b/arch/arm/mach-u300/core.c
@@ -37,6 +37,7 @@
 #include <mach/hardware.h>
 #include <mach/syscon.h>
 #include <mach/dma_channels.h>
+#include <mach/gpio-u300.h>
 
 #include "clock.h"
 #include "mmc.h"
@@ -239,7 +240,7 @@ static struct resource gpio_resources[] = {
                 .end   = IRQ_U300_GPIO_PORT2,
                 .flags = IORESOURCE_IRQ,
         },
-#ifdef U300_COH901571_3
+#if defined(CONFIG_MACH_U300_BS365) || defined(CONFIG_MACH_U300_BS335)
         {
                 .name  = "gpio3",
                 .start = IRQ_U300_GPIO_PORT3,
@@ -252,6 +253,7 @@ static struct resource gpio_resources[] = {
                 .end   = IRQ_U300_GPIO_PORT4,
                 .flags = IORESOURCE_IRQ,
         },
+#endif
 #ifdef CONFIG_MACH_U300_BS335
         {
                 .name  = "gpio5",
@@ -266,7 +268,6 @@ static struct resource gpio_resources[] = {
                 .flags = IORESOURCE_IRQ,
         },
 #endif /* CONFIG_MACH_U300_BS335 */
-#endif /* U300_COH901571_3 */
 };
 
 static struct resource keypad_resources[] = {
@@ -1556,11 +1557,35 @@ static struct platform_device i2c1_device = {
         .resource = i2c1_resources,
 };
 
+/*
+ * The different variants have a few different versions of the
+ * GPIO block, with different number of ports.
+ */
+static struct u300_gpio_platform u300_gpio_plat = {
+#if defined(CONFIG_MACH_U300_BS2X) || defined(CONFIG_MACH_U300_BS330)
+        .variant = U300_GPIO_COH901335,
+        .ports = 3,
+#endif
+#ifdef CONFIG_MACH_U300_BS335
+        .variant = U300_GPIO_COH901571_3_BS335,
+        .ports = 7,
+#endif
+#ifdef CONFIG_MACH_U300_BS365
+        .variant = U300_GPIO_COH901571_3_BS365,
+        .ports = 5,
+#endif
+        .gpio_base = 0,
+        .gpio_irq_base = IRQ_U300_GPIO_BASE,
+};
+
 static struct platform_device gpio_device = {
         .name = "u300-gpio",
         .id = -1,
         .num_resources = ARRAY_SIZE(gpio_resources),
         .resource = gpio_resources,
+        .dev = {
+                .platform_data = &u300_gpio_plat,
+        },
 };
 
 static struct platform_device keypad_device = {
@@ -1666,7 +1691,7 @@ void __init u300_init_irq(void)
         BUG_ON(IS_ERR(clk));
         clk_enable(clk);
 
-        for (i = 0; i < NR_IRQS; i++)
+        for (i = 0; i < U300_VIC_IRQS_END; i++)
                 set_bit(i, (unsigned long *) &mask[0]);
         vic_init((void __iomem *) U300_INTCON0_VBASE, 0, mask[0], mask[0]);
         vic_init((void __iomem *) U300_INTCON1_VBASE, 32, mask[1], mask[1]);