diff options
author | Gabor Juhos <juhosg@openwrt.org> | 2011-01-04 20:28:21 (GMT) |
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committer | Ralf Baechle <ralf@linux-mips.org> | 2011-01-18 18:30:27 (GMT) |
commit | 3f348c5d1aaa0b8b2563f50d2d9a0c64e7d649fb (patch) | |
tree | cdd531781d22fe64c5c3cce0a56de153bf9cc397 /arch/mips/ath79/dev-gpio-buttons.c | |
parent | 858f763c1cc37ecc6ab39dec60bb3a46606dcac4 (diff) | |
download | linux-3f348c5d1aaa0b8b2563f50d2d9a0c64e7d649fb.tar.xz |
MIPS: ath79: add common GPIO buttons device
Almost all boards have one or more push buttons connected to GPIO lines.
This patch adds common code to register a platform_device for them.
The patch also adds support for the buttons on the PB44 board.
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Signed-off-by: Imre Kaloz <kaloz@openwrt.org>
Cc: linux-mips@linux-mips.org
Cc: Luis R. Rodriguez <lrodriguez@atheros.com>
Cc: Cliff Holden <Cliff.Holden@Atheros.com>
Cc: Kathy Giori <Kathy.Giori@Atheros.com>
Patchwork: https://patchwork.linux-mips.org/patch/1954/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/ath79/dev-gpio-buttons.c')
-rw-r--r-- | arch/mips/ath79/dev-gpio-buttons.c | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/arch/mips/ath79/dev-gpio-buttons.c b/arch/mips/ath79/dev-gpio-buttons.c new file mode 100644 index 0000000..4b0168a --- /dev/null +++ b/arch/mips/ath79/dev-gpio-buttons.c @@ -0,0 +1,58 @@ +/* + * Atheros AR71XX/AR724X/AR913X GPIO button support + * + * Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org> + * Copyright (C) 2008 Imre Kaloz <kaloz@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/slab.h" +#include <linux/platform_device.h> + +#include "dev-gpio-buttons.h" + +void __init ath79_register_gpio_keys_polled(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); +} |