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linux/drivers/input/keyboard/mtk-pmic-keys.c
Mattijs Korpershoek 994673dc66 Input: mtk-pmic-keys - add support for MT6358 
MT6358 pmic keys behave differently than mt6397 and mt6323: there are
two interrupts per key: one for press, the other one for release (_r)

Signed-off-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
Link: https://lore.kernel.org/r/20220121140323.4080640-4-mkorpershoek@baylibre.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2022-02-07 21:45:20 -08:00

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9.5 KiB
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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2017 MediaTek, Inc.
*
* Author: Chen Zhong <chen.zhong@mediatek.com>
*/
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/mfd/mt6323/registers.h>
#include <linux/mfd/mt6358/registers.h>
#include <linux/mfd/mt6397/core.h>
#include <linux/mfd/mt6397/registers.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/regmap.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,
};
static const struct mtk_pmic_regs mt6358_regs = {
.keys_regs[MTK_PMIC_PWRKEY_INDEX] =
MTK_PMIC_KEYS_REGS(MT6358_TOPSTATUS,
0x2, MT6358_PSC_TOP_INT_CON0, 0x5),
.keys_regs[MTK_PMIC_HOMEKEY_INDEX] =
MTK_PMIC_KEYS_REGS(MT6358_TOPSTATUS,
0x8, MT6358_PSC_TOP_INT_CON0, 0xa),
.pmic_rst_reg = MT6358_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;
int irq_r; /* optional: release irq if different */
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;
}
if (info->irq_r > 0) {
ret = devm_request_threaded_irq(keys->dev, info->irq_r, 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_r: %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);
if (keys->keys[index].irq_r > 0)
enable_irq_wake(keys->keys[index].irq_r);
}
}
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);
if (keys->keys[index].irq_r > 0)
disable_irq_wake(keys->keys[index].irq_r);
}
}
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,
}, {
.compatible = "mediatek,mt6358-keys",
.data = &mt6358_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;
static const char *const irqnames[] = { "powerkey", "homekey" };
static const char *const irqnames_r[] = { "powerkey_r", "homekey_r" };
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 ||
keycount > ARRAY_SIZE(irqnames)) {
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_byname(pdev, irqnames[index]);
if (keys->keys[index].irq < 0) {
of_node_put(child);
return keys->keys[index].irq;
}
if (of_device_is_compatible(node, "mediatek,mt6358-keys")) {
keys->keys[index].irq_r = platform_get_irq_byname(pdev,
irqnames_r[index]);
if (keys->keys[index].irq_r < 0) {
of_node_put(child);
return keys->keys[index].irq_r;
}
}
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);
of_node_put(child);
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) {
of_node_put(child);
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");
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