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Commit ef1e3e7a authored by Rafał Miłecki's avatar Rafał Miłecki Committed by Ralf Baechle
Browse files

MIPS: BCM47XX: Prepare support for GPIO buttons 



So far this adds support for one Netgear model only, but it's designed
and ready to add many more device. We could hopefully import database
from OpenWrt.
Support for SSB is currently disabled, because SSB doesn't implement IRQ
domain yet.

Signed-off-by: default avatarRafał Miłecki <zajec5@gmail.com>
Acked-by: default avatarHauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: default avatarJohn Crispin <blogic@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/6300/
parent 515fa75d

arch/mips/bcm47xx/Makefile

+1 −1
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@@ -4,5 +4,5 @@ 
#



obj-y				+= irq.o nvram.o prom.o serial.o setup.o time.o sprom.o

obj-y				+= board.o leds.o

obj-y				+= board.o buttons.o leds.o

obj-$(CONFIG_BCM47XX_SSB)	+= wgt634u.o

arch/mips/bcm47xx/bcm47xx_private.h

+3 −0
Original line number Diff line number Diff line
@@ -3,6 +3,9 @@ 


#include <linux/kernel.h>



/* buttons.c */

int __init bcm47xx_buttons_register(void);



/* leds.c */

void __init bcm47xx_leds_register(void);

arch/mips/bcm47xx/buttons.c

0 → 100644
+95 −0
Original line number Diff line number Diff line 
#include "bcm47xx_private.h"



#include <linux/input.h>

#include <linux/gpio_keys.h>

#include <linux/interrupt.h>

#include <linux/ssb/ssb_embedded.h>

#include <bcm47xx_board.h>

#include <bcm47xx.h>



/**************************************************

 * Database

 **************************************************/



static const struct gpio_keys_button

bcm47xx_buttons_netgear_wndr4500_v1[] __initconst = {

	{

		.code		= KEY_WPS_BUTTON,

		.gpio		= 4,

		.active_low	= 1,

	},

	{

		.code		= KEY_RFKILL,

		.gpio		= 5,

		.active_low	= 1,

	},

	{

		.code		= KEY_RESTART,

		.gpio		= 6,

		.active_low	= 1,

	},

};



/**************************************************

 * Init

 **************************************************/



static struct gpio_keys_platform_data bcm47xx_button_pdata;



static struct platform_device bcm47xx_buttons_gpio_keys = {

	.name = "gpio-keys",

	.dev = {

		.platform_data = &bcm47xx_button_pdata,

	}

};



/* Copy data from __initconst */

static int __init bcm47xx_buttons_copy(const struct gpio_keys_button *buttons,

				       size_t nbuttons)

{

	size_t size = nbuttons * sizeof(*buttons);



	bcm47xx_button_pdata.buttons = kmalloc(size, GFP_KERNEL);

	if (!bcm47xx_button_pdata.buttons)

		return -ENOMEM;

	memcpy(bcm47xx_button_pdata.buttons, buttons, size);

	bcm47xx_button_pdata.nbuttons = nbuttons;



	return 0;

}



#define bcm47xx_copy_bdata(dev_buttons)					\

	bcm47xx_buttons_copy(dev_buttons, ARRAY_SIZE(dev_buttons));



int __init bcm47xx_buttons_register(void)

{

	enum bcm47xx_board board = bcm47xx_board_get();

	int err;



#ifdef CONFIG_BCM47XX_SSB

	if (bcm47xx_bus_type == BCM47XX_BUS_TYPE_SSB) {

		pr_debug("Buttons on SSB are not supported yet.\n");

		return -ENOTSUPP;

	}

#endif



	switch (board) {

	case BCM47XX_BOARD_NETGEAR_WNDR4500V1:

		err = bcm47xx_copy_bdata(bcm47xx_buttons_netgear_wndr4500_v1);

		break;

	default:

		pr_debug("No buttons configuration found for this device\n");

		return -ENOTSUPP;

	}



	if (err)

		return -ENOMEM;



	err = platform_device_register(&bcm47xx_buttons_gpio_keys);

	if (err) {

		pr_err("Failed to register platform device: %d\n", err);

		return err;

	}



	return 0;

}

arch/mips/bcm47xx/setup.c

+1 −0
Original line number Diff line number Diff line
@@ -255,6 +255,7 @@ static int __init bcm47xx_register_bus_complete(void) 
		break;

#endif

	}

	bcm47xx_buttons_register();

	bcm47xx_leds_register();



	return 0;