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