From d9bdffd2102404e8ea5f71c5b88dad890984164d Mon Sep 17 00:00:00 2001 From: Phil Sutter Date: Wed, 4 Mar 2009 23:27:15 -0800 Subject: Input: add driver for S1 button of rb532 Mikrotik's Routerboard 532 has two builtin buttons, from which one triggers a hardware reset. The other one is accessible through GPIO pin 1. Sadly, this pin is being multiplexed with UART0 input, so enabling it as interrupt source (as implied by the gpio-keys driver) is not possible unless UART0 has been turned off. The later one though is a rather bad idea as the Routerboard is an embedded device with only a single serial port, so it's almost always used as serial console device. This patch adds a driver based on INPUT_POLLDEV, which disables the UART and reconfigures GPIO pin 1 temporarily while reading the button state. This procedure works fine and has been tested as part of another, unpublished driver for this device. Signed-off-by: Phil Sutter Signed-off-by: Dmitry Torokhov --- arch/mips/rb532/devices.c | 19 +------------------ 1 file changed, 1 insertion(+), 18 deletions(-) (limited to 'arch/mips/rb532') diff --git a/arch/mips/rb532/devices.c b/arch/mips/rb532/devices.c index 4a5f05b662ae..9f40e1ff9b4f 100644 --- a/arch/mips/rb532/devices.c +++ b/arch/mips/rb532/devices.c @@ -200,26 +200,9 @@ static struct platform_device rb532_led = { .id = -1, }; -static struct gpio_keys_button rb532_gpio_btn[] = { - { - .gpio = 1, - .code = BTN_0, - .desc = "S1", - .active_low = 1, - } -}; - -static struct gpio_keys_platform_data rb532_gpio_btn_data = { - .buttons = rb532_gpio_btn, - .nbuttons = ARRAY_SIZE(rb532_gpio_btn), -}; - static struct platform_device rb532_button = { - .name = "gpio-keys", + .name = "rb532-button", .id = -1, - .dev = { - .platform_data = &rb532_gpio_btn_data, - } }; static struct resource rb532_wdt_res[] = { -- cgit v1.2.3-58-ga151