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334 lines
8.1 KiB
334 lines
8.1 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Copyright (C) 2017 MediaTek, Inc. |
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* |
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* Author: Chen Zhong <[email protected]> |
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*/ |
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#include <linux/input.h> |
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#include <linux/interrupt.h> |
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#include <linux/kernel.h> |
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#include <linux/mfd/mt6323/registers.h> |
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#include <linux/mfd/mt6397/core.h> |
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#include <linux/mfd/mt6397/registers.h> |
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#include <linux/module.h> |
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#include <linux/of_device.h> |
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#include <linux/of.h> |
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#include <linux/platform_device.h> |
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#include <linux/regmap.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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of_node_put(child); |
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return keys->keys[index].irq; |
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} |
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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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of_node_put(child); |
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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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of_node_put(child); |
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return error; |
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} |
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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 <[email protected]>"); |
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MODULE_DESCRIPTION("MTK pmic-keys driver v0.1");
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