diff options
Diffstat (limited to 'target/linux/ramips/files-3.7/arch/mips/ralink/common/dev-gpio-buttons.c')
-rw-r--r-- | target/linux/ramips/files-3.7/arch/mips/ralink/common/dev-gpio-buttons.c | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/target/linux/ramips/files-3.7/arch/mips/ralink/common/dev-gpio-buttons.c b/target/linux/ramips/files-3.7/arch/mips/ralink/common/dev-gpio-buttons.c new file mode 100644 index 0000000000..75a2a17143 --- /dev/null +++ b/target/linux/ramips/files-3.7/arch/mips/ralink/common/dev-gpio-buttons.c @@ -0,0 +1,57 @@ +/* + * Ralink SoC GPIO button support + * + * Copyright (C) 2010 Gabor Juhos <juhosg@openwrt.org> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + */ + +#include "linux/init.h" +#include <linux/platform_device.h> +#include <linux/slab.h> + +#include <asm/mach-ralink/dev-gpio-buttons.h> + +void __init ramips_register_gpio_buttons(int id, + unsigned poll_interval, + unsigned nbuttons, + struct gpio_keys_button *buttons) +{ + struct platform_device *pdev; + struct gpio_keys_platform_data pdata; + struct gpio_keys_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-keys-polled", id); + if (!pdev) + goto err_free_buttons; + + memset(&pdata, 0, sizeof(pdata)); + 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); +} |