^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Rohm BU21029 touchscreen controller driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2015-2018 Bosch Sicherheitssysteme GmbH
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * This program is free software; you can redistribute it and/or modify
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * it under the terms of the GNU General Public License version 2 as
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * published by the Free Software Foundation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/gpio/consumer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/input.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/input/touchscreen.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/irq.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/regulator/consumer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/timer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * HW_ID1 Register (PAGE=0, ADDR=0x0E, Reset value=0x02, Read only)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) * +--------+--------+--------+--------+--------+--------+--------+--------+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) * | D7 | D6 | D5 | D4 | D3 | D2 | D1 | D0 |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * +--------+--------+--------+--------+--------+--------+--------+--------+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) * | HW_IDH |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) * +--------+--------+--------+--------+--------+--------+--------+--------+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) * HW_ID2 Register (PAGE=0, ADDR=0x0F, Reset value=0x29, Read only)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) * +--------+--------+--------+--------+--------+--------+--------+--------+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) * | D7 | D6 | D5 | D4 | D3 | D2 | D1 | D0 |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) * +--------+--------+--------+--------+--------+--------+--------+--------+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) * | HW_IDL |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) * +--------+--------+--------+--------+--------+--------+--------+--------+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) * HW_IDH: high 8bits of IC's ID
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) * HW_IDL: low 8bits of IC's ID
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #define BU21029_HWID_REG (0x0E << 3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #define SUPPORTED_HWID 0x0229
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) * CFR0 Register (PAGE=0, ADDR=0x00, Reset value=0x20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) * +--------+--------+--------+--------+--------+--------+--------+--------+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) * | D7 | D6 | D5 | D4 | D3 | D2 | D1 | D0 |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) * +--------+--------+--------+--------+--------+--------+--------+--------+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) * | 0 | 0 | CALIB | INTRM | 0 | 0 | 0 | 0 |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) * +--------+--------+--------+--------+--------+--------+--------+--------+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) * CALIB: 0 = not to use calibration result (*)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) * 1 = use calibration result
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) * INTRM: 0 = INT output depend on "pen down" (*)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) * 1 = INT output always "0"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) #define BU21029_CFR0_REG (0x00 << 3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) #define CFR0_VALUE 0x00
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) * CFR1 Register (PAGE=0, ADDR=0x01, Reset value=0xA6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) * +--------+--------+--------+--------+--------+--------+--------+--------+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) * | D7 | D6 | D5 | D4 | D3 | D2 | D1 | D0 |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) * +--------+--------+--------+--------+--------+--------+--------+--------+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) * | MAV | AVE[2:0] | 0 | SMPL[2:0] |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) * +--------+--------+--------+--------+--------+--------+--------+--------+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) * MAV: 0 = median average filter off
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) * 1 = median average filter on (*)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) * AVE: AVE+1 = number of average samples for MAV,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) * if AVE>SMPL, then AVE=SMPL (=3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) * SMPL: SMPL+1 = number of conversion samples for MAV (=7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) #define BU21029_CFR1_REG (0x01 << 3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) #define CFR1_VALUE 0xA6
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) * CFR2 Register (PAGE=0, ADDR=0x02, Reset value=0x04)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) * +--------+--------+--------+--------+--------+--------+--------+--------+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) * | D7 | D6 | D5 | D4 | D3 | D2 | D1 | D0 |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) * +--------+--------+--------+--------+--------+--------+--------+--------+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) * | INTVL_TIME[3:0] | TIME_ST_ADC[3:0] |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) * +--------+--------+--------+--------+--------+--------+--------+--------+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) * INTVL_TIME: waiting time between completion of conversion
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) * and start of next conversion, only usable in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) * autoscan mode (=20.480ms)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) * TIME_ST_ADC: waiting time between application of voltage
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) * to panel and start of A/D conversion (=100us)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) #define BU21029_CFR2_REG (0x02 << 3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) #define CFR2_VALUE 0xC9
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) * CFR3 Register (PAGE=0, ADDR=0x0B, Reset value=0x72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) * +--------+--------+--------+--------+--------+--------+--------+--------+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) * | D7 | D6 | D5 | D4 | D3 | D2 | D1 | D0 |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) * +--------+--------+--------+--------+--------+--------+--------+--------+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) * | RM8 | STRETCH| PU90K | DUAL | PIDAC_OFS[3:0] |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) * +--------+--------+--------+--------+--------+--------+--------+--------+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) * RM8: 0 = coordinate resolution is 12bit (*)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) * 1 = coordinate resolution is 8bit
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) * STRETCH: 0 = SCL_STRETCH function off
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) * 1 = SCL_STRETCH function on (*)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) * PU90K: 0 = internal pull-up resistance for touch detection is ~50kohms (*)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) * 1 = internal pull-up resistance for touch detection is ~90kohms
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) * DUAL: 0 = dual touch detection off (*)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) * 1 = dual touch detection on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) * PIDAC_OFS: dual touch detection circuit adjustment, it is not necessary
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) * to change this from initial value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) #define BU21029_CFR3_REG (0x0B << 3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) #define CFR3_VALUE 0x42
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) * LDO Register (PAGE=0, ADDR=0x0C, Reset value=0x00)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) * +--------+--------+--------+--------+--------+--------+--------+--------+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) * | D7 | D6 | D5 | D4 | D3 | D2 | D1 | D0 |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) * +--------+--------+--------+--------+--------+--------+--------+--------+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) * | 0 | PVDD[2:0] | 0 | AVDD[2:0] |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) * +--------+--------+--------+--------+--------+--------+--------+--------+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) * PVDD: output voltage of panel output regulator (=2.000V)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) * AVDD: output voltage of analog circuit regulator (=2.000V)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) #define BU21029_LDO_REG (0x0C << 3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) #define LDO_VALUE 0x77
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) * Serial Interface Command Byte 1 (CID=1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) * +--------+--------+--------+--------+--------+--------+--------+--------+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) * | D7 | D6 | D5 | D4 | D3 | D2 | D1 | D0 |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) * +--------+--------+--------+--------+--------+--------+--------+--------+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) * | 1 | CF | CMSK | PDM | STP |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) * +--------+--------+--------+--------+--------+--------+--------+--------+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) * CF: conversion function, see table 3 in datasheet p6 (=0000, automatic scan)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) * CMSK: 0 = executes convert function (*)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) * 1 = reads the convert result
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) * PDM: 0 = power down after convert function stops (*)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) * 1 = keep power on after convert function stops
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) * STP: 1 = abort current conversion and power down, set to "0" automatically
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) #define BU21029_AUTOSCAN 0x80
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) * The timeout value needs to be larger than INTVL_TIME + tConv4 (sample and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) * conversion time), where tConv4 is calculated by formula:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) * tPON + tDLY1 + (tTIME_ST_ADC + (tADC * tSMPL) * 2 + tDLY2) * 3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) * see figure 8 in datasheet p15 for details of each field.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) #define PEN_UP_TIMEOUT_MS 50
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) #define STOP_DELAY_MIN_US 50
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) #define STOP_DELAY_MAX_US 1000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) #define START_DELAY_MS 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) #define BUF_LEN 8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) #define SCALE_12BIT (1 << 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) #define MAX_12BIT ((1 << 12) - 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) #define DRIVER_NAME "bu21029"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) struct bu21029_ts_data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) struct i2c_client *client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) struct input_dev *in_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) struct timer_list timer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) struct regulator *vdd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) struct gpio_desc *reset_gpios;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) u32 x_plate_ohms;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) struct touchscreen_properties prop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) static void bu21029_touch_report(struct bu21029_ts_data *bu21029, const u8 *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) u16 x, y, z1, z2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) u32 rz;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) s32 max_pressure = input_abs_get_max(bu21029->in_dev, ABS_PRESSURE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) * compose upper 8 and lower 4 bits into a 12bit value:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) * +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) * | ByteH | ByteL |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) * +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) * |b07|b06|b05|b04|b03|b02|b01|b00|b07|b06|b05|b04|b03|b02|b01|b00|
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) * +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) * |v11|v10|v09|v08|v07|v06|v05|v04|v03|v02|v01|v00| 0 | 0 | 0 | 0 |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) * +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) x = (buf[0] << 4) | (buf[1] >> 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) y = (buf[2] << 4) | (buf[3] >> 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) z1 = (buf[4] << 4) | (buf[5] >> 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) z2 = (buf[6] << 4) | (buf[7] >> 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) if (z1 && z2) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) * calculate Rz (pressure resistance value) by equation:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) * Rz = Rx * (x/Q) * ((z2/z1) - 1), where
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) * Rx is x-plate resistance,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) * Q is the touch screen resolution (8bit = 256, 12bit = 4096)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) * x, z1, z2 are the measured positions.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) rz = z2 - z1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) rz *= x;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) rz *= bu21029->x_plate_ohms;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) rz /= z1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) rz = DIV_ROUND_CLOSEST(rz, SCALE_12BIT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) if (rz <= max_pressure) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) touchscreen_report_pos(bu21029->in_dev, &bu21029->prop,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) x, y, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) input_report_abs(bu21029->in_dev, ABS_PRESSURE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) max_pressure - rz);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) input_report_key(bu21029->in_dev, BTN_TOUCH, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) input_sync(bu21029->in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) static void bu21029_touch_release(struct timer_list *t)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) struct bu21029_ts_data *bu21029 = from_timer(bu21029, t, timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) input_report_abs(bu21029->in_dev, ABS_PRESSURE, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) input_report_key(bu21029->in_dev, BTN_TOUCH, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) input_sync(bu21029->in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) static irqreturn_t bu21029_touch_soft_irq(int irq, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) struct bu21029_ts_data *bu21029 = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) u8 buf[BUF_LEN];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) * Read touch data and deassert interrupt (will assert again after
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) * INTVL_TIME + tConv4 for continuous touch)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) error = i2c_smbus_read_i2c_block_data(bu21029->client, BU21029_AUTOSCAN,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) sizeof(buf), buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) if (error < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) bu21029_touch_report(bu21029, buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) /* reset timer for pen up detection */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) mod_timer(&bu21029->timer,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) jiffies + msecs_to_jiffies(PEN_UP_TIMEOUT_MS));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) static void bu21029_put_chip_in_reset(struct bu21029_ts_data *bu21029)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) if (bu21029->reset_gpios) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) gpiod_set_value_cansleep(bu21029->reset_gpios, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) usleep_range(STOP_DELAY_MIN_US, STOP_DELAY_MAX_US);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) static int bu21029_start_chip(struct input_dev *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) struct bu21029_ts_data *bu21029 = input_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) struct i2c_client *i2c = bu21029->client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) struct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) u8 reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) u8 value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) } init_table[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) {BU21029_CFR0_REG, CFR0_VALUE},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) {BU21029_CFR1_REG, CFR1_VALUE},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) {BU21029_CFR2_REG, CFR2_VALUE},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) {BU21029_CFR3_REG, CFR3_VALUE},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) {BU21029_LDO_REG, LDO_VALUE}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) int error, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) __be16 hwid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) error = regulator_enable(bu21029->vdd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) dev_err(&i2c->dev, "failed to power up chip: %d", error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) /* take chip out of reset */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) if (bu21029->reset_gpios) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) gpiod_set_value_cansleep(bu21029->reset_gpios, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) msleep(START_DELAY_MS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) error = i2c_smbus_read_i2c_block_data(i2c, BU21029_HWID_REG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) sizeof(hwid), (u8 *)&hwid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) if (error < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) dev_err(&i2c->dev, "failed to read HW ID\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) goto err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) if (be16_to_cpu(hwid) != SUPPORTED_HWID) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) dev_err(&i2c->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) "unsupported HW ID 0x%x\n", be16_to_cpu(hwid));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) error = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) goto err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) for (i = 0; i < ARRAY_SIZE(init_table); ++i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) error = i2c_smbus_write_byte_data(i2c,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) init_table[i].reg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) init_table[i].value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) if (error < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) dev_err(&i2c->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) "failed to write %#02x to register %#02x: %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) init_table[i].value, init_table[i].reg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) goto err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) error = i2c_smbus_write_byte(i2c, BU21029_AUTOSCAN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) if (error < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) dev_err(&i2c->dev, "failed to start autoscan\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) goto err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) enable_irq(bu21029->client->irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) err_out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) bu21029_put_chip_in_reset(bu21029);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) regulator_disable(bu21029->vdd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) static void bu21029_stop_chip(struct input_dev *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) struct bu21029_ts_data *bu21029 = input_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) disable_irq(bu21029->client->irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) del_timer_sync(&bu21029->timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) bu21029_put_chip_in_reset(bu21029);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) regulator_disable(bu21029->vdd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) static int bu21029_probe(struct i2c_client *client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) const struct i2c_device_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) struct bu21029_ts_data *bu21029;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) struct input_dev *in_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) if (!i2c_check_functionality(client->adapter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) I2C_FUNC_SMBUS_WRITE_BYTE |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) I2C_FUNC_SMBUS_WRITE_BYTE_DATA |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) I2C_FUNC_SMBUS_READ_I2C_BLOCK)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) dev_err(&client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) "i2c functionality support is not sufficient\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) bu21029 = devm_kzalloc(&client->dev, sizeof(*bu21029), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) if (!bu21029)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) error = device_property_read_u32(&client->dev, "rohm,x-plate-ohms",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) &bu21029->x_plate_ohms);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) dev_err(&client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) "invalid 'x-plate-ohms' supplied: %d\n", error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) bu21029->vdd = devm_regulator_get(&client->dev, "vdd");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) if (IS_ERR(bu21029->vdd)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) error = PTR_ERR(bu21029->vdd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) if (error != -EPROBE_DEFER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) dev_err(&client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) "failed to acquire 'vdd' supply: %d\n", error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) bu21029->reset_gpios = devm_gpiod_get_optional(&client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) "reset", GPIOD_OUT_HIGH);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) if (IS_ERR(bu21029->reset_gpios)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) error = PTR_ERR(bu21029->reset_gpios);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) if (error != -EPROBE_DEFER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) dev_err(&client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) "failed to acquire 'reset' gpio: %d\n", error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) in_dev = devm_input_allocate_device(&client->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) if (!in_dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) dev_err(&client->dev, "unable to allocate input device\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) bu21029->client = client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) bu21029->in_dev = in_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) timer_setup(&bu21029->timer, bu21029_touch_release, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) in_dev->name = DRIVER_NAME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) in_dev->id.bustype = BUS_I2C;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) in_dev->open = bu21029_start_chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) in_dev->close = bu21029_stop_chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) input_set_capability(in_dev, EV_KEY, BTN_TOUCH);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) input_set_abs_params(in_dev, ABS_X, 0, MAX_12BIT, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) input_set_abs_params(in_dev, ABS_Y, 0, MAX_12BIT, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) input_set_abs_params(in_dev, ABS_PRESSURE, 0, MAX_12BIT, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) touchscreen_parse_properties(in_dev, false, &bu21029->prop);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) input_set_drvdata(in_dev, bu21029);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) irq_set_status_flags(client->irq, IRQ_NOAUTOEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) error = devm_request_threaded_irq(&client->dev, client->irq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) NULL, bu21029_touch_soft_irq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) IRQF_ONESHOT, DRIVER_NAME, bu21029);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) dev_err(&client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) "unable to request touch irq: %d\n", error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) error = input_register_device(in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) dev_err(&client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) "unable to register input device: %d\n", error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) i2c_set_clientdata(client, bu21029);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) static int __maybe_unused bu21029_suspend(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) struct i2c_client *i2c = to_i2c_client(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) struct bu21029_ts_data *bu21029 = i2c_get_clientdata(i2c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) if (!device_may_wakeup(dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) mutex_lock(&bu21029->in_dev->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) if (bu21029->in_dev->users)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) bu21029_stop_chip(bu21029->in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) mutex_unlock(&bu21029->in_dev->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) static int __maybe_unused bu21029_resume(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) struct i2c_client *i2c = to_i2c_client(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) struct bu21029_ts_data *bu21029 = i2c_get_clientdata(i2c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) if (!device_may_wakeup(dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) mutex_lock(&bu21029->in_dev->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) if (bu21029->in_dev->users)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) bu21029_start_chip(bu21029->in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) mutex_unlock(&bu21029->in_dev->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) static SIMPLE_DEV_PM_OPS(bu21029_pm_ops, bu21029_suspend, bu21029_resume);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) static const struct i2c_device_id bu21029_ids[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) { DRIVER_NAME, 0 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) { /* sentinel */ }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) MODULE_DEVICE_TABLE(i2c, bu21029_ids);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) #ifdef CONFIG_OF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) static const struct of_device_id bu21029_of_ids[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) { .compatible = "rohm,bu21029" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) { /* sentinel */ }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) MODULE_DEVICE_TABLE(of, bu21029_of_ids);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) static struct i2c_driver bu21029_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) .name = DRIVER_NAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) .of_match_table = of_match_ptr(bu21029_of_ids),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) .pm = &bu21029_pm_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) .id_table = bu21029_ids,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) .probe = bu21029_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) module_i2c_driver(bu21029_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) MODULE_AUTHOR("Zhu Yi <yi.zhu5@cn.bosch.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) MODULE_DESCRIPTION("Rohm BU21029 touchscreen controller driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) MODULE_LICENSE("GPL v2");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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