// SPDX-License-Identifier: GPL-2.0-or-later /* * OMAP4 Keypad Driver * * Copyright (C) 2010 Texas Instruments * * Author: Abraham Arce <[email protected]> * Initial Code: Syed Rafiuddin <[email protected]> */ #include <linux/module.h> #include <linux/interrupt.h> #include <linux/platform_device.h> #include <linux/clk.h> #include <linux/errno.h> #include <linux/io.h> #include <linux/of.h> #include <linux/input.h> #include <linux/input/matrix_keypad.h> #include <linux/slab.h> #include <linux/pm_runtime.h> #include <linux/pm_wakeirq.h> /* OMAP4 registers */ #define OMAP4_KBD_REVISION … #define OMAP4_KBD_SYSCONFIG … #define OMAP4_KBD_SYSSTATUS … #define OMAP4_KBD_IRQSTATUS … #define OMAP4_KBD_IRQENABLE … #define OMAP4_KBD_WAKEUPENABLE … #define OMAP4_KBD_PENDING … #define OMAP4_KBD_CTRL … #define OMAP4_KBD_DEBOUNCINGTIME … #define OMAP4_KBD_LONGKEYTIME … #define OMAP4_KBD_TIMEOUT … #define OMAP4_KBD_STATEMACHINE … #define OMAP4_KBD_ROWINPUTS … #define OMAP4_KBD_COLUMNOUTPUTS … #define OMAP4_KBD_FULLCODE31_0 … #define OMAP4_KBD_FULLCODE63_32 … /* OMAP4 bit definitions */ #define OMAP4_DEF_IRQENABLE_EVENTEN … #define OMAP4_DEF_IRQENABLE_LONGKEY … #define OMAP4_DEF_WUP_EVENT_ENA … #define OMAP4_DEF_WUP_LONG_KEY_ENA … #define OMAP4_DEF_CTRL_NOSOFTMODE … #define OMAP4_DEF_CTRL_PTV_SHIFT … /* OMAP4 values */ #define OMAP4_VAL_IRQDISABLE … /* * Errata i689: If a key is released for a time shorter than debounce time, * the keyboard will idle and never detect the key release. The workaround * is to use at least a 12ms debounce time. See omap5432 TRM chapter * "26.4.6.2 Keyboard Controller Timer" for more information. */ #define OMAP4_KEYPAD_PTV_DIV_128 … #define OMAP4_KEYPAD_DEBOUNCINGTIME_MS(dbms, ptv) … #define OMAP4_VAL_DEBOUNCINGTIME_16MS … #define OMAP4_KEYPAD_AUTOIDLE_MS … #define OMAP4_KEYPAD_IDLE_CHECK_MS … enum { … }; struct omap4_keypad { … }; static int kbd_readl(struct omap4_keypad *keypad_data, u32 offset) { … } static void kbd_writel(struct omap4_keypad *keypad_data, u32 offset, u32 value) { … } static int kbd_read_irqreg(struct omap4_keypad *keypad_data, u32 offset) { … } static void kbd_write_irqreg(struct omap4_keypad *keypad_data, u32 offset, u32 value) { … } static int omap4_keypad_report_keys(struct omap4_keypad *keypad_data, u64 keys, bool down) { … } static void omap4_keypad_scan_keys(struct omap4_keypad *keypad_data, u64 keys) { … } /* Interrupt handlers */ static irqreturn_t omap4_keypad_irq_handler(int irq, void *dev_id) { … } static irqreturn_t omap4_keypad_irq_thread_fn(int irq, void *dev_id) { … } static int omap4_keypad_open(struct input_dev *input) { … } static void omap4_keypad_stop(struct omap4_keypad *keypad_data) { … } static void omap4_keypad_close(struct input_dev *input) { … } static int omap4_keypad_parse_dt(struct device *dev, struct omap4_keypad *keypad_data) { … } static int omap4_keypad_check_revision(struct device *dev, struct omap4_keypad *keypad_data) { … } /* * Errata ID i689 "1.32 Keyboard Key Up Event Can Be Missed". * Interrupt may not happen for key-up events. We must clear stuck * key-up events after the keyboard hardware has auto-idled. */ static int omap4_keypad_runtime_suspend(struct device *dev) { … } static const struct dev_pm_ops omap4_keypad_pm_ops = …; static void omap4_disable_pm(void *d) { … } static int omap4_keypad_probe(struct platform_device *pdev) { … } static void omap4_keypad_remove(struct platform_device *pdev) { … } static const struct of_device_id omap_keypad_dt_match[] = …; MODULE_DEVICE_TABLE(of, omap_keypad_dt_match); static struct platform_driver omap4_keypad_driver = …; module_platform_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; MODULE_ALIAS(…) …;
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