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/*
* arch/arm/mach-tegra/board-loki-kbc.c
* Keys configuration for Nvidia tegra4 loki platform.
*
* Copyright (c) 2012-2014, NVIDIA CORPORATION. All rights reserved.
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
* 02111-1307, USA
*/
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/input.h>
#include <linux/io.h>
#include <linux/input/tegra_kbc.h>
#include <linux/gpio.h>
#include <linux/gpio_keys.h>
#include <linux/mfd/palmas.h>
#include "tegra-board-id.h"
#include "board.h"
#include "board-loki.h"
#include "devices.h"
#include "iomap.h"
#include "wakeups-t12x.h"
#define GPIO_KEY(_id, _gpio, _iswake) \
{ \
.code = _id, \
.gpio = TEGRA_GPIO_##_gpio, \
.active_low = 1, \
.desc = #_id, \
.type = EV_KEY, \
.wakeup = _iswake, \
.debounce_interval = 10, \
}
#define GPIO_IKEY(_id, _irq, _iswake, _deb) \
{ \
.code = _id, \
.gpio = -1, \
.irq = _irq, \
.desc = #_id, \
.type = EV_KEY, \
.wakeup = _iswake, \
.debounce_interval = _deb, \
}
#define PMC_WAKE_STATUS 0x14
#define TEGRA_WAKE_PWR_INT (1UL << 18)
#define PMC_WAKE2_STATUS 0x168
#define LOKI_FFD_A00 0x0a
static int loki_wakeup_key(void);
static struct gpio_keys_button loki_int_keys[] = {
[0] = GPIO_KEY(KEY_POWER, PQ0, 1),
[1] = {
.code = SW_LID,
.gpio = TEGRA_GPIO_HALL,
.irq = -1,
.type = EV_SW,
.desc = "Hall Effect Sensor",
.active_low = 1,
.wakeup = 1,
.debounce_interval = 0,
},
[2] = {
.code = KEY_WAKEUP,
.gpio = TEGRA_GPIO_PS6,
.irq = -1,
.type = EV_KEY,
.desc = "Gamepad",
.active_low = 1,
.wakeup = 1,
.debounce_interval = 0,
},
};
static struct gpio_keys_platform_data loki_int_keys_pdata = {
.buttons = loki_int_keys,
.nbuttons = ARRAY_SIZE(loki_int_keys),
.wakeup_key = loki_wakeup_key,
};
static struct platform_device loki_int_keys_device = {
.name = "gpio-keys",
.id = 0,
.dev = {
.platform_data = &loki_int_keys_pdata,
},
};
static int loki_wakeup_key(void)
{
int wakeup_key;
u64 status;
status = readl(IO_ADDRESS(TEGRA_PMC_BASE) + PMC_WAKE_STATUS)
| (u64)readl(IO_ADDRESS(TEGRA_PMC_BASE)
+ PMC_WAKE2_STATUS) << 32;
if (status & (1ULL << TEGRA_WAKE_GPIO_PQ0))
wakeup_key = KEY_POWER;
else if (status & (1ULL << TEGRA_WAKE_GPIO_PS0))
wakeup_key = SW_LID;
else if (status & (1ULL << TEGRA_WAKE_GPIO_PS6))
wakeup_key = KEY_WAKEUP;
else
wakeup_key = -1;
return wakeup_key;
}
int __init loki_kbc_init(void)
{
struct board_info board_info;
int ret;
tegra_get_board_info(&board_info);
pr_info("Boardid:SKU = 0x%04x:0x%04x\n",
board_info.board_id, board_info.sku);
/* GPIO PS6 is not used for Loki FFD A00 board */
if (board_info.fab == LOKI_FFD_A00)
loki_int_keys_pdata.nbuttons -= 1;
ret = platform_device_register(&loki_int_keys_device);
return ret;
}
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