// SPDX-License-Identifier: GPL-2.0-or-later /* * twl4030_keypad.c - driver for 8x8 keypad controller in twl4030 chips * * Copyright (C) 2007 Texas Instruments, Inc. * Copyright (C) 2008 Nokia Corporation * * Code re-written for 2430SDP by: * Syed Mohammed Khasim <[email protected]> * * Initial Code: * Manjunatha G K <[email protected]> */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/interrupt.h> #include <linux/input.h> #include <linux/platform_device.h> #include <linux/mfd/twl.h> #include <linux/slab.h> #include <linux/of.h> /* * The TWL4030 family chips include a keypad controller that supports * up to an 8x8 switch matrix. The controller can issue system wakeup * events, since it uses only the always-on 32KiHz oscillator, and has * an internal state machine that decodes pressed keys, including * multi-key combinations. * * This driver lets boards define what keycodes they wish to report for * which scancodes, as part of the "struct twl4030_keypad_data" used in * the probe() routine. * * See the TPS65950 documentation; that's the general availability * version of the TWL5030 second generation part. */ #define TWL4030_MAX_ROWS … #define TWL4030_MAX_COLS … /* * Note that we add space for an extra column so that we can handle * row lines connected to the gnd (see twl4030_col_xlate()). */ #define TWL4030_ROW_SHIFT … #define TWL4030_KEYMAP_SIZE … struct twl4030_keypad { … }; /*----------------------------------------------------------------------*/ /* arbitrary prescaler value 0..7 */ #define PTV_PRESCALER … /* Register Offsets */ #define KEYP_CTRL … #define KEYP_DEB … #define KEYP_LONG_KEY … #define KEYP_LK_PTV … #define KEYP_TIMEOUT_L … #define KEYP_TIMEOUT_H … #define KEYP_KBC … #define KEYP_KBR … #define KEYP_SMS … #define KEYP_FULL_CODE_7_0 … #define KEYP_FULL_CODE_15_8 … #define KEYP_FULL_CODE_23_16 … #define KEYP_FULL_CODE_31_24 … #define KEYP_FULL_CODE_39_32 … #define KEYP_FULL_CODE_47_40 … #define KEYP_FULL_CODE_55_48 … #define KEYP_FULL_CODE_63_56 … #define KEYP_ISR1 … #define KEYP_IMR1 … #define KEYP_ISR2 … #define KEYP_IMR2 … #define KEYP_SIR … #define KEYP_EDR … #define KEYP_SIH_CTRL … /* KEYP_CTRL_REG Fields */ #define KEYP_CTRL_SOFT_NRST … #define KEYP_CTRL_SOFTMODEN … #define KEYP_CTRL_LK_EN … #define KEYP_CTRL_TOE_EN … #define KEYP_CTRL_TOLE_EN … #define KEYP_CTRL_RP_EN … #define KEYP_CTRL_KBD_ON … /* KEYP_DEB, KEYP_LONG_KEY, KEYP_TIMEOUT_x*/ #define KEYP_PERIOD_US(t, prescale) … /* KEYP_LK_PTV_REG Fields */ #define KEYP_LK_PTV_PTV_SHIFT … /* KEYP_{IMR,ISR,SIR} Fields */ #define KEYP_IMR1_MIS … #define KEYP_IMR1_TO … #define KEYP_IMR1_LK … #define KEYP_IMR1_KP … /* KEYP_EDR Fields */ #define KEYP_EDR_KP_FALLING … #define KEYP_EDR_KP_RISING … #define KEYP_EDR_KP_BOTH … #define KEYP_EDR_LK_FALLING … #define KEYP_EDR_LK_RISING … #define KEYP_EDR_TO_FALLING … #define KEYP_EDR_TO_RISING … #define KEYP_EDR_MIS_FALLING … #define KEYP_EDR_MIS_RISING … /*----------------------------------------------------------------------*/ static int twl4030_kpread(struct twl4030_keypad *kp, u8 *data, u32 reg, u8 num_bytes) { … } static int twl4030_kpwrite_u8(struct twl4030_keypad *kp, u8 data, u32 reg) { … } static inline u16 twl4030_col_xlate(struct twl4030_keypad *kp, u8 col) { … } static int twl4030_read_kp_matrix_state(struct twl4030_keypad *kp, u16 *state) { … } static bool twl4030_is_in_ghost_state(struct twl4030_keypad *kp, u16 *key_state) { … } static void twl4030_kp_scan(struct twl4030_keypad *kp, bool release_all) { … } /* * Keypad interrupt handler */ static irqreturn_t do_kp_irq(int irq, void *_kp) { … } static int twl4030_kp_program(struct twl4030_keypad *kp) { … } /* * Registers keypad device with input subsystem * and configures TWL4030 keypad registers */ static int twl4030_kp_probe(struct platform_device *pdev) { … } #ifdef CONFIG_OF static const struct of_device_id twl4030_keypad_dt_match_table[] = …; MODULE_DEVICE_TABLE(of, twl4030_keypad_dt_match_table); #endif /* * NOTE: twl4030 are multi-function devices connected via I2C. * So this device is a child of an I2C parent, thus it needs to * support unplug/replug (which most platform devices don't). */ static struct platform_driver twl4030_kp_driver = …; module_platform_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; MODULE_ALIAS(…) …;
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