ARM: tegra: paz00: enable WiFi rfkill when booting from device tree

There currently aren't bindings for a WiFi rfkill button, and defining
a good binding is non-trivial. Manually register this "device" when
booting from device tree, in order to bring DT support to the same
feature level as board files, which will in turn allow board files to be
deprecated.
Signed-off-by: Stephen Warren <swarren@nvidia.com>

arch/arm/mach-tegra/board-dt-tegra20.c

@@ -126,6 +126,13 @@ static void __init harmony_init(void)
 }
 #endif
 
+#ifdef CONFIG_MACH_PAZ00
+static void __init paz00_init(void)
+{
+	tegra_paz00_wifikill_init();
+}
+#endif
+
 static struct {
 	char *machine;
 	void (*init)(void);
@@ -136,6 +143,9 @@ static struct {
 #ifdef CONFIG_MACH_HARMONY
 	{ "nvidia,harmony", harmony_init },
 #endif
+#ifdef CONFIG_MACH_PAZ00
+	{ "compal,paz00", paz00_init },
+#endif
 };
 
 static void __init tegra_dt_init_late(void)

arch/arm/mach-tegra/board-paz00.c

@@ -148,7 +148,6 @@ static struct platform_device *paz00_devices[] __initdata = {
 	&debug_uart,
 	&tegra_sdhci_device4,
 	&tegra_sdhci_device1,
-	&wifi_rfkill_device,
 	&leds_gpio,
 	&gpio_keys_device,
 };
@@ -201,6 +200,11 @@ static struct tegra_sdhci_platform_data sdhci_pdata4 = {
 	.is_8bit	= 1,
 };
 
+void __init tegra_paz00_wifikill_init(void)
+{
+	platform_device_register(&wifi_rfkill_device);
+}
+
 static void __init tegra_paz00_init(void)
 {
 	tegra_clk_init_from_table(paz00_clk_init_table);
@@ -211,6 +215,7 @@ static void __init tegra_paz00_init(void)
 	tegra_sdhci_device4.dev.platform_data = &sdhci_pdata4;
 
 	platform_add_devices(paz00_devices, ARRAY_SIZE(paz00_devices));
+	tegra_paz00_wifikill_init();
 
 	paz00_i2c_init();
 	paz00_usb_init();

arch/arm/mach-tegra/board.h

@@ -53,5 +53,7 @@ int __init harmony_pcie_init(void);
 static inline int harmony_pcie_init(void) { return 0; }
 #endif
 
+void __init tegra_paz00_wifikill_init(void);
+
 extern struct sys_timer tegra_timer;
 #endif