[ar71xx] add gpio-buttons devices

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@12544 3c298f89-4303-0410-b956-a3cf2f4a3e73

target/linux/ar71xx/files/arch/mips/ar71xx/mach-rb-4xx.c

@@ -15,6 +15,7 @@
 #include <linux/spi/spi.h>
 #include <linux/spi/flash.h>
 #include <linux/spi/mmc_spi.h>
+#include <linux/input.h>
 
 #include <asm/mips_machine.h>
 #include <asm/mach-ar71xx/ar71xx.h>
@@ -22,6 +23,9 @@
 #include <asm/mach-ar71xx/platform.h>
 
 #define RB4XX_GPIO_USER_LED	4
+#define RB4XX_GPIO_RESET_SWITCH	7
+
+#define RB4XX_BUTTONS_POLL_INTERVAL	20
 
 static struct gpio_led rb4xx_leds_gpio[] __initdata = {
 	{
@@ -31,6 +35,17 @@ static struct gpio_led rb4xx_leds_gpio[] __initdata = {
 	},
 };
 
+static struct gpio_button rb4xx_gpio_buttons[] __initdata = {
+	{
+		.desc		= "reset_switch",
+		.type		= EV_KEY,
+		.code		= BTN_0,
+		.threshold	= 5,
+		.gpio		= RB4XX_GPIO_RESET_SWITCH,
+		.active_low	= 1,
+	}
+};
+
 static struct platform_device rb4xx_nand_device = {
 	.name	= "rb4xx-nand",
 	.id	= -1,
@@ -145,6 +160,10 @@ static void __init rb411_setup(void)
 	ar71xx_add_device_leds_gpio(-1, ARRAY_SIZE(rb4xx_leds_gpio),
 					rb4xx_leds_gpio);
 
+	ar71xx_add_device_gpio_buttons(-1, RB4XX_BUTTONS_POLL_INTERVAL,
+					ARRAY_SIZE(rb4xx_gpio_buttons),
+					rb4xx_gpio_buttons);
+
 	platform_device_register(&rb4xx_nand_device);
 
 	ar71xx_pci_init(ARRAY_SIZE(rb4xx_pci_irqs), rb4xx_pci_irqs);
@@ -163,6 +182,10 @@ static void __init rb433_setup(void)
 	ar71xx_add_device_leds_gpio(-1, ARRAY_SIZE(rb4xx_leds_gpio),
 					rb4xx_leds_gpio);
 
+	ar71xx_add_device_gpio_buttons(-1, RB4XX_BUTTONS_POLL_INTERVAL,
+					ARRAY_SIZE(rb4xx_gpio_buttons),
+					rb4xx_gpio_buttons);
+
 	platform_device_register(&rb4xx_nand_device);
 
 	ar71xx_pci_init(ARRAY_SIZE(rb4xx_pci_irqs), rb4xx_pci_irqs);
@@ -181,6 +204,10 @@ static void __init rb450_setup(void)
 	ar71xx_add_device_leds_gpio(-1, ARRAY_SIZE(rb4xx_leds_gpio),
 					rb4xx_leds_gpio);
 
+	ar71xx_add_device_gpio_buttons(-1, RB4XX_BUTTONS_POLL_INTERVAL,
+					ARRAY_SIZE(rb4xx_gpio_buttons),
+					rb4xx_gpio_buttons);
+
 	platform_device_register(&rb4xx_nand_device);
 }
 

target/linux/ar71xx/files/arch/mips/ar71xx/mach-wp543.c

@@ -12,17 +12,22 @@
 #include <linux/platform_device.h>
 #include <linux/spi/spi.h>
 #include <linux/spi/flash.h>
+#include <linux/input.h>
 
 #include <asm/mips_machine.h>
 #include <asm/mach-ar71xx/ar71xx.h>
 #include <asm/mach-ar71xx/pci.h>
 #include <asm/mach-ar71xx/platform.h>
 
+#define WP543_GPIO_SW6		2
 #define WP543_GPIO_LED_1	3
 #define WP543_GPIO_LED_2	4
 #define WP543_GPIO_LED_WLAN	5
 #define WP543_GPIO_LED_CONN	6
 #define WP543_GPIO_LED_DIAG	7
+#define WP543_GPIO_SW4		8
+
+#define WP543_BUTTONS_POLL_INTERVAL	20
 
 static struct flash_platform_data wp543_flash_data = {
 	/* TODO: add partition map */
@@ -74,6 +79,22 @@ static struct gpio_led wp543_leds_gpio[] __initdata = {
 	}
 };
 
+static struct gpio_button wp543_gpio_buttons[] __initdata = {
+	{
+		.desc		= "sw6",
+		.type		= EV_KEY,
+		.code		= BTN_0,
+		.threshold	= 5,
+		.gpio		= WP543_GPIO_SW6,
+	}, {
+		.desc		= "sw4",
+		.type		= EV_KEY,
+		.code		= BTN_1,
+		.threshold	= 5,
+		.gpio		= WP543_GPIO_SW4,
+	}
+};
+
 static void __init wp543_setup(void)
 {
 	ar71xx_add_device_spi(NULL, wp543_spi_info, ARRAY_SIZE(wp543_spi_info));
@@ -87,6 +108,10 @@ static void __init wp543_setup(void)
 
 	ar71xx_add_device_leds_gpio(-1, ARRAY_SIZE(wp543_leds_gpio),
 					wp543_leds_gpio);
+
+	ar71xx_add_device_gpio_buttons(-1, WP543_BUTTONS_POLL_INTERVAL,
+					ARRAY_SIZE(wp543_gpio_buttons),
+					wp543_gpio_buttons);
 }
 
 MIPS_MACHINE(MACH_AR71XX_WP543, "Compex WP543", wp543_setup);

target/linux/ar71xx/files/arch/mips/ar71xx/platform.c

@@ -372,6 +372,48 @@ err_free_leds:
 	kfree(p);
 }
 
+void __init ar71xx_add_device_gpio_buttons(int id,
+					   unsigned poll_interval,
+					   unsigned nbuttons,
+					   struct gpio_button *buttons)
+{
+	struct platform_device *pdev;
+	struct gpio_buttons_platform_data pdata;
+	struct gpio_button *p;
+	int err;
+
+	p = kmalloc(nbuttons * sizeof(*p), GFP_KERNEL);
+	if (!p)
+		return;
+
+	memcpy(p, buttons, nbuttons * sizeof(*p));
+
+	pdev = platform_device_alloc("gpio-buttons", id);
+	if (!pdev)
+		goto err_free_buttons;
+
+	pdata.poll_interval = poll_interval;
+	pdata.nbuttons = nbuttons;
+	pdata.buttons = p;
+
+	err = platform_device_add_data(pdev, &pdata, sizeof(pdata));
+	if (err)
+		goto err_put_pdev;
+
+
+	err = platform_device_add(pdev);
+	if (err)
+		goto err_put_pdev;
+
+	return;
+
+err_put_pdev:
+	platform_device_put(pdev);
+
+err_free_buttons:
+	kfree(p);
+}
+
 void __init ar71xx_set_mac_base(char *mac_str)
 {
 	u8 tmp[ETH_ALEN];

target/linux/ar71xx/files/include/asm-mips/mach-ar71xx/platform.h

@@ -17,6 +17,7 @@
 #include <linux/phy.h>
 #include <linux/spi/spi.h>
 #include <linux/leds.h>
+#include <linux/gpio_buttons.h>
 
 struct ag71xx_platform_data {
 	u32		reset_bit;
@@ -54,4 +55,9 @@ extern void ar71xx_add_device_leds_gpio(int id,
 				   unsigned num_leds,
 				   struct gpio_led *leds) __init;
 
+extern void ar71xx_add_device_gpio_buttons(int id,
+				   unsigned poll_interval,
+				   unsigned nbuttons,
+				   struct gpio_button *buttons) __init;
+
 #endif /* __ASM_MACH_AR71XX_PLATFORM_H */