3f348c5d1a
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>
59 lines
1.3 KiB
C
59 lines
1.3 KiB
C
/*
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* Atheros AR71XX/AR724X/AR913X GPIO button support
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*
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* Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
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* Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation.
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*/
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#include "linux/init.h"
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#include "linux/slab.h"
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#include <linux/platform_device.h>
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#include "dev-gpio-buttons.h"
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void __init ath79_register_gpio_keys_polled(int id,
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unsigned poll_interval,
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unsigned nbuttons,
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struct gpio_keys_button *buttons)
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{
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struct platform_device *pdev;
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struct gpio_keys_platform_data pdata;
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struct gpio_keys_button *p;
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int err;
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p = kmalloc(nbuttons * sizeof(*p), GFP_KERNEL);
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if (!p)
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return;
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memcpy(p, buttons, nbuttons * sizeof(*p));
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pdev = platform_device_alloc("gpio-keys-polled", id);
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if (!pdev)
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goto err_free_buttons;
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memset(&pdata, 0, sizeof(pdata));
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pdata.poll_interval = poll_interval;
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pdata.nbuttons = nbuttons;
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pdata.buttons = p;
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err = platform_device_add_data(pdev, &pdata, sizeof(pdata));
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if (err)
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goto err_put_pdev;
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err = platform_device_add(pdev);
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if (err)
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goto err_put_pdev;
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return;
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err_put_pdev:
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platform_device_put(pdev);
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err_free_buttons:
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kfree(p);
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}
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