mirror of
https://github.com/torvalds/linux.git
synced 2024-11-26 06:02:05 +00:00
input: Add MediaTek PMIC keys support
This patch add support to handle MediaTek PMIC MT6397/MT6323 key interrupts including pwrkey and homekey, also add setting for long press key shutdown behavior. Signed-off-by: Chen Zhong <chen.zhong@mediatek.com> Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Chen Zhong
Lee Jones
parent
8f59e8cb90
commit
3e9f0b3e2b
@ -747,4 +747,13 @@ config KEYBOARD_BCM
|
||||
To compile this driver as a module, choose M here: the
|
||||
module will be called bcm-keypad.
|
||||
|
||||
config KEYBOARD_MTK_PMIC
|
||||
tristate "MediaTek PMIC keys support"
|
||||
depends on MFD_MT6397
|
||||
help
|
||||
Say Y here if you want to use the pmic keys (powerkey/homekey).
|
||||
|
||||
To compile this driver as a module, choose M here: the
|
||||
module will be called pmic-keys.
|
||||
|
||||
endif
|
||||
|
||||
@ -40,6 +40,7 @@ obj-$(CONFIG_KEYBOARD_MATRIX) += matrix_keypad.o
|
||||
obj-$(CONFIG_KEYBOARD_MAX7359) += max7359_keypad.o
|
||||
obj-$(CONFIG_KEYBOARD_MCS) += mcs_touchkey.o
|
||||
obj-$(CONFIG_KEYBOARD_MPR121) += mpr121_touchkey.o
|
||||
obj-$(CONFIG_KEYBOARD_MTK_PMIC) += mtk-pmic-keys.o
|
||||
obj-$(CONFIG_KEYBOARD_NEWTON) += newtonkbd.o
|
||||
obj-$(CONFIG_KEYBOARD_NOMADIK) += nomadik-ske-keypad.o
|
||||
obj-$(CONFIG_KEYBOARD_NSPIRE) += nspire-keypad.o
|
||||
|
||||
339
drivers/input/keyboard/mtk-pmic-keys.c
Normal file
339
drivers/input/keyboard/mtk-pmic-keys.c
Normal file
@ -0,0 +1,339 @@
|
||||
/*
|
||||
* Copyright (C) 2017 MediaTek, Inc.
|
||||
*
|
||||
* Author: Chen Zhong <chen.zhong@mediatek.com>
|
||||
*
|
||||
* This software is licensed under the terms of the GNU General Public
|
||||
* License version 2, as published by the Free Software Foundation, and
|
||||
* may be copied, distributed, and modified under those terms.
|
||||
*
|
||||
* 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.
|
||||
*
|
||||
*/
|
||||
|
||||
#include <linux/module.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/input.h>
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/of.h>
|
||||
#include <linux/of_device.h>
|
||||
#include <linux/regmap.h>
|
||||
#include <linux/mfd/mt6323/registers.h>
|
||||
#include <linux/mfd/mt6397/registers.h>
|
||||
#include <linux/mfd/mt6397/core.h>
|
||||
|
||||
#define MTK_PMIC_PWRKEY_RST_EN_MASK 0x1
|
||||
#define MTK_PMIC_PWRKEY_RST_EN_SHIFT 6
|
||||
#define MTK_PMIC_HOMEKEY_RST_EN_MASK 0x1
|
||||
#define MTK_PMIC_HOMEKEY_RST_EN_SHIFT 5
|
||||
#define MTK_PMIC_RST_DU_MASK 0x3
|
||||
#define MTK_PMIC_RST_DU_SHIFT 8
|
||||
|
||||
#define MTK_PMIC_PWRKEY_RST \
|
||||
(MTK_PMIC_PWRKEY_RST_EN_MASK << MTK_PMIC_PWRKEY_RST_EN_SHIFT)
|
||||
#define MTK_PMIC_HOMEKEY_RST \
|
||||
(MTK_PMIC_HOMEKEY_RST_EN_MASK << MTK_PMIC_HOMEKEY_RST_EN_SHIFT)
|
||||
|
||||
#define MTK_PMIC_PWRKEY_INDEX 0
|
||||
#define MTK_PMIC_HOMEKEY_INDEX 1
|
||||
#define MTK_PMIC_MAX_KEY_COUNT 2
|
||||
|
||||
struct mtk_pmic_keys_regs {
|
||||
u32 deb_reg;
|
||||
u32 deb_mask;
|
||||
u32 intsel_reg;
|
||||
u32 intsel_mask;
|
||||
};
|
||||
|
||||
#define MTK_PMIC_KEYS_REGS(_deb_reg, _deb_mask, \
|
||||
_intsel_reg, _intsel_mask) \
|
||||
{ \
|
||||
.deb_reg = _deb_reg, \
|
||||
.deb_mask = _deb_mask, \
|
||||
.intsel_reg = _intsel_reg, \
|
||||
.intsel_mask = _intsel_mask, \
|
||||
}
|
||||
|
||||
struct mtk_pmic_regs {
|
||||
const struct mtk_pmic_keys_regs keys_regs[MTK_PMIC_MAX_KEY_COUNT];
|
||||
u32 pmic_rst_reg;
|
||||
};
|
||||
|
||||
static const struct mtk_pmic_regs mt6397_regs = {
|
||||
.keys_regs[MTK_PMIC_PWRKEY_INDEX] =
|
||||
MTK_PMIC_KEYS_REGS(MT6397_CHRSTATUS,
|
||||
0x8, MT6397_INT_RSV, 0x10),
|
||||
.keys_regs[MTK_PMIC_HOMEKEY_INDEX] =
|
||||
MTK_PMIC_KEYS_REGS(MT6397_OCSTATUS2,
|
||||
0x10, MT6397_INT_RSV, 0x8),
|
||||
.pmic_rst_reg = MT6397_TOP_RST_MISC,
|
||||
};
|
||||
|
||||
static const struct mtk_pmic_regs mt6323_regs = {
|
||||
.keys_regs[MTK_PMIC_PWRKEY_INDEX] =
|
||||
MTK_PMIC_KEYS_REGS(MT6323_CHRSTATUS,
|
||||
0x2, MT6323_INT_MISC_CON, 0x10),
|
||||
.keys_regs[MTK_PMIC_HOMEKEY_INDEX] =
|
||||
MTK_PMIC_KEYS_REGS(MT6323_CHRSTATUS,
|
||||
0x4, MT6323_INT_MISC_CON, 0x8),
|
||||
.pmic_rst_reg = MT6323_TOP_RST_MISC,
|
||||
};
|
||||
|
||||
struct mtk_pmic_keys_info {
|
||||
struct mtk_pmic_keys *keys;
|
||||
const struct mtk_pmic_keys_regs *regs;
|
||||
unsigned int keycode;
|
||||
int irq;
|
||||
bool wakeup:1;
|
||||
};
|
||||
|
||||
struct mtk_pmic_keys {
|
||||
struct input_dev *input_dev;
|
||||
struct device *dev;
|
||||
struct regmap *regmap;
|
||||
struct mtk_pmic_keys_info keys[MTK_PMIC_MAX_KEY_COUNT];
|
||||
};
|
||||
|
||||
enum mtk_pmic_keys_lp_mode {
|
||||
LP_DISABLE,
|
||||
LP_ONEKEY,
|
||||
LP_TWOKEY,
|
||||
};
|
||||
|
||||
static void mtk_pmic_keys_lp_reset_setup(struct mtk_pmic_keys *keys,
|
||||
u32 pmic_rst_reg)
|
||||
{
|
||||
int ret;
|
||||
u32 long_press_mode, long_press_debounce;
|
||||
|
||||
ret = of_property_read_u32(keys->dev->of_node,
|
||||
"power-off-time-sec", &long_press_debounce);
|
||||
if (ret)
|
||||
long_press_debounce = 0;
|
||||
|
||||
regmap_update_bits(keys->regmap, pmic_rst_reg,
|
||||
MTK_PMIC_RST_DU_MASK << MTK_PMIC_RST_DU_SHIFT,
|
||||
long_press_debounce << MTK_PMIC_RST_DU_SHIFT);
|
||||
|
||||
ret = of_property_read_u32(keys->dev->of_node,
|
||||
"mediatek,long-press-mode", &long_press_mode);
|
||||
if (ret)
|
||||
long_press_mode = LP_DISABLE;
|
||||
|
||||
switch (long_press_mode) {
|
||||
case LP_ONEKEY:
|
||||
regmap_update_bits(keys->regmap, pmic_rst_reg,
|
||||
MTK_PMIC_PWRKEY_RST,
|
||||
MTK_PMIC_PWRKEY_RST);
|
||||
regmap_update_bits(keys->regmap, pmic_rst_reg,
|
||||
MTK_PMIC_HOMEKEY_RST,
|
||||
0);
|
||||
break;
|
||||
case LP_TWOKEY:
|
||||
regmap_update_bits(keys->regmap, pmic_rst_reg,
|
||||
MTK_PMIC_PWRKEY_RST,
|
||||
MTK_PMIC_PWRKEY_RST);
|
||||
regmap_update_bits(keys->regmap, pmic_rst_reg,
|
||||
MTK_PMIC_HOMEKEY_RST,
|
||||
MTK_PMIC_HOMEKEY_RST);
|
||||
break;
|
||||
case LP_DISABLE:
|
||||
regmap_update_bits(keys->regmap, pmic_rst_reg,
|
||||
MTK_PMIC_PWRKEY_RST,
|
||||
0);
|
||||
regmap_update_bits(keys->regmap, pmic_rst_reg,
|
||||
MTK_PMIC_HOMEKEY_RST,
|
||||
0);
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
static irqreturn_t mtk_pmic_keys_irq_handler_thread(int irq, void *data)
|
||||
{
|
||||
struct mtk_pmic_keys_info *info = data;
|
||||
u32 key_deb, pressed;
|
||||
|
||||
regmap_read(info->keys->regmap, info->regs->deb_reg, &key_deb);
|
||||
|
||||
key_deb &= info->regs->deb_mask;
|
||||
|
||||
pressed = !key_deb;
|
||||
|
||||
input_report_key(info->keys->input_dev, info->keycode, pressed);
|
||||
input_sync(info->keys->input_dev);
|
||||
|
||||
dev_dbg(info->keys->dev, "(%s) key =%d using PMIC\n",
|
||||
pressed ? "pressed" : "released", info->keycode);
|
||||
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static int mtk_pmic_key_setup(struct mtk_pmic_keys *keys,
|
||||
struct mtk_pmic_keys_info *info)
|
||||
{
|
||||
int ret;
|
||||
|
||||
info->keys = keys;
|
||||
|
||||
ret = regmap_update_bits(keys->regmap, info->regs->intsel_reg,
|
||||
info->regs->intsel_mask,
|
||||
info->regs->intsel_mask);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
ret = devm_request_threaded_irq(keys->dev, info->irq, NULL,
|
||||
mtk_pmic_keys_irq_handler_thread,
|
||||
IRQF_ONESHOT | IRQF_TRIGGER_HIGH,
|
||||
"mtk-pmic-keys", info);
|
||||
if (ret) {
|
||||
dev_err(keys->dev, "Failed to request IRQ: %d: %d\n",
|
||||
info->irq, ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
input_set_capability(keys->input_dev, EV_KEY, info->keycode);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int __maybe_unused mtk_pmic_keys_suspend(struct device *dev)
|
||||
{
|
||||
struct mtk_pmic_keys *keys = dev_get_drvdata(dev);
|
||||
int index;
|
||||
|
||||
for (index = 0; index < MTK_PMIC_MAX_KEY_COUNT; index++) {
|
||||
if (keys->keys[index].wakeup)
|
||||
enable_irq_wake(keys->keys[index].irq);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int __maybe_unused mtk_pmic_keys_resume(struct device *dev)
|
||||
{
|
||||
struct mtk_pmic_keys *keys = dev_get_drvdata(dev);
|
||||
int index;
|
||||
|
||||
for (index = 0; index < MTK_PMIC_MAX_KEY_COUNT; index++) {
|
||||
if (keys->keys[index].wakeup)
|
||||
disable_irq_wake(keys->keys[index].irq);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static SIMPLE_DEV_PM_OPS(mtk_pmic_keys_pm_ops, mtk_pmic_keys_suspend,
|
||||
mtk_pmic_keys_resume);
|
||||
|
||||
static const struct of_device_id of_mtk_pmic_keys_match_tbl[] = {
|
||||
{
|
||||
.compatible = "mediatek,mt6397-keys",
|
||||
.data = &mt6397_regs,
|
||||
}, {
|
||||
.compatible = "mediatek,mt6323-keys",
|
||||
.data = &mt6323_regs,
|
||||
}, {
|
||||
/* sentinel */
|
||||
}
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, of_mtk_pmic_keys_match_tbl);
|
||||
|
||||
static int mtk_pmic_keys_probe(struct platform_device *pdev)
|
||||
{
|
||||
int error, index = 0;
|
||||
unsigned int keycount;
|
||||
struct mt6397_chip *pmic_chip = dev_get_drvdata(pdev->dev.parent);
|
||||
struct device_node *node = pdev->dev.of_node, *child;
|
||||
struct mtk_pmic_keys *keys;
|
||||
const struct mtk_pmic_regs *mtk_pmic_regs;
|
||||
struct input_dev *input_dev;
|
||||
const struct of_device_id *of_id =
|
||||
of_match_device(of_mtk_pmic_keys_match_tbl, &pdev->dev);
|
||||
|
||||
keys = devm_kzalloc(&pdev->dev, sizeof(*keys), GFP_KERNEL);
|
||||
if (!keys)
|
||||
return -ENOMEM;
|
||||
|
||||
keys->dev = &pdev->dev;
|
||||
keys->regmap = pmic_chip->regmap;
|
||||
mtk_pmic_regs = of_id->data;
|
||||
|
||||
keys->input_dev = input_dev = devm_input_allocate_device(keys->dev);
|
||||
if (!input_dev) {
|
||||
dev_err(keys->dev, "input allocate device fail.\n");
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
input_dev->name = "mtk-pmic-keys";
|
||||
input_dev->id.bustype = BUS_HOST;
|
||||
input_dev->id.vendor = 0x0001;
|
||||
input_dev->id.product = 0x0001;
|
||||
input_dev->id.version = 0x0001;
|
||||
|
||||
keycount = of_get_available_child_count(node);
|
||||
if (keycount > MTK_PMIC_MAX_KEY_COUNT) {
|
||||
dev_err(keys->dev, "too many keys defined (%d)\n", keycount);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
for_each_child_of_node(node, child) {
|
||||
keys->keys[index].regs = &mtk_pmic_regs->keys_regs[index];
|
||||
|
||||
keys->keys[index].irq = platform_get_irq(pdev, index);
|
||||
if (keys->keys[index].irq < 0)
|
||||
return keys->keys[index].irq;
|
||||
|
||||
error = of_property_read_u32(child,
|
||||
"linux,keycodes", &keys->keys[index].keycode);
|
||||
if (error) {
|
||||
dev_err(keys->dev,
|
||||
"failed to read key:%d linux,keycode property: %d\n",
|
||||
index, error);
|
||||
return error;
|
||||
}
|
||||
|
||||
if (of_property_read_bool(child, "wakeup-source"))
|
||||
keys->keys[index].wakeup = true;
|
||||
|
||||
error = mtk_pmic_key_setup(keys, &keys->keys[index]);
|
||||
if (error)
|
||||
return error;
|
||||
|
||||
index++;
|
||||
}
|
||||
|
||||
error = input_register_device(input_dev);
|
||||
if (error) {
|
||||
dev_err(&pdev->dev,
|
||||
"register input device failed (%d)\n", error);
|
||||
return error;
|
||||
}
|
||||
|
||||
mtk_pmic_keys_lp_reset_setup(keys, mtk_pmic_regs->pmic_rst_reg);
|
||||
|
||||
platform_set_drvdata(pdev, keys);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct platform_driver pmic_keys_pdrv = {
|
||||
.probe = mtk_pmic_keys_probe,
|
||||
.driver = {
|
||||
.name = "mtk-pmic-keys",
|
||||
.of_match_table = of_mtk_pmic_keys_match_tbl,
|
||||
.pm = &mtk_pmic_keys_pm_ops,
|
||||
},
|
||||
};
|
||||
|
||||
module_platform_driver(pmic_keys_pdrv);
|
||||
|
||||
MODULE_LICENSE("GPL v2");
|
||||
MODULE_AUTHOR("Chen Zhong <chen.zhong@mediatek.com>");
|
||||
MODULE_DESCRIPTION("MTK pmic-keys driver v0.1");
|
||||
Loading…
Reference in New Issue
Block a user