forked from Minki/linux
Input: add bu21029 touch driver
Add Rohm BU21029 resistive touch panel controller support with I2C interface. Signed-off-by: Zhu Yi <yi.zhu5@cn.bosch.com> Signed-off-by: Mark Jonas <mark.jonas@de.bosch.com> Reviewed-by: Heiko Schocher <hs@denx.de> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Zhu Yi
Dmitry Torokhov
parent
5ae3769917
commit
3a658f23fb
@ -0,0 +1,35 @@
|
||||
* Rohm BU21029 Touch Screen Controller
|
||||
|
||||
Required properties:
|
||||
- compatible : must be "rohm,bu21029"
|
||||
- reg : i2c device address of the chip (0x40 or 0x41)
|
||||
- interrupt-parent : the phandle for the gpio controller
|
||||
- interrupts : (gpio) interrupt to which the chip is connected
|
||||
- rohm,x-plate-ohms : x-plate resistance in Ohm
|
||||
|
||||
Optional properties:
|
||||
- reset-gpios : gpio pin to reset the chip (active low)
|
||||
- touchscreen-size-x : horizontal resolution of touchscreen (in pixels)
|
||||
- touchscreen-size-y : vertical resolution of touchscreen (in pixels)
|
||||
- touchscreen-max-pressure: maximum pressure value
|
||||
- vdd-supply : power supply for the controller
|
||||
|
||||
Example:
|
||||
|
||||
&i2c1 {
|
||||
/* ... */
|
||||
|
||||
bu21029: bu21029@40 {
|
||||
compatible = "rohm,bu21029";
|
||||
reg = <0x40>;
|
||||
interrupt-parent = <&gpio1>;
|
||||
interrupts = <4 IRQ_TYPE_EDGE_FALLING>;
|
||||
reset-gpios = <&gpio6 16 GPIO_ACTIVE_LOW>;
|
||||
rohm,x-plate-ohms = <600>;
|
||||
touchscreen-size-x = <800>;
|
||||
touchscreen-size-y = <480>;
|
||||
touchscreen-max-pressure = <4095>;
|
||||
};
|
||||
|
||||
/* ... */
|
||||
};
|
||||
@ -151,6 +151,18 @@ config TOUCHSCREEN_BU21013
|
||||
To compile this driver as a module, choose M here: the
|
||||
module will be called bu21013_ts.
|
||||
|
||||
config TOUCHSCREEN_BU21029
|
||||
tristate "Rohm BU21029 based touch panel controllers"
|
||||
depends on I2C
|
||||
help
|
||||
Say Y here if you have a Rohm BU21029 touchscreen controller
|
||||
connected to your system.
|
||||
|
||||
If unsure, say N.
|
||||
|
||||
To compile this driver as a module, choose M here: the
|
||||
module will be called bu21029_ts.
|
||||
|
||||
config TOUCHSCREEN_CHIPONE_ICN8318
|
||||
tristate "chipone icn8318 touchscreen controller"
|
||||
depends on GPIOLIB || COMPILE_TEST
|
||||
|
||||
@ -18,6 +18,7 @@ obj-$(CONFIG_TOUCHSCREEN_AR1021_I2C) += ar1021_i2c.o
|
||||
obj-$(CONFIG_TOUCHSCREEN_ATMEL_MXT) += atmel_mxt_ts.o
|
||||
obj-$(CONFIG_TOUCHSCREEN_AUO_PIXCIR) += auo-pixcir-ts.o
|
||||
obj-$(CONFIG_TOUCHSCREEN_BU21013) += bu21013_ts.o
|
||||
obj-$(CONFIG_TOUCHSCREEN_BU21029) += bu21029_ts.o
|
||||
obj-$(CONFIG_TOUCHSCREEN_CHIPONE_ICN8318) += chipone_icn8318.o
|
||||
obj-$(CONFIG_TOUCHSCREEN_CHIPONE_ICN8505) += chipone_icn8505.o
|
||||
obj-$(CONFIG_TOUCHSCREEN_CY8CTMG110) += cy8ctmg110_ts.o
|
||||
|
||||
484
drivers/input/touchscreen/bu21029_ts.c
Normal file
484
drivers/input/touchscreen/bu21029_ts.c
Normal file
@ -0,0 +1,484 @@
|
||||
// SPDX-License-Identifier: GPL-2.0
|
||||
/*
|
||||
* Rohm BU21029 touchscreen controller driver
|
||||
*
|
||||
* Copyright (C) 2015-2018 Bosch Sicherheitssysteme GmbH
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License version 2 as
|
||||
* published by the Free Software Foundation.
|
||||
*/
|
||||
|
||||
#include <linux/delay.h>
|
||||
#include <linux/gpio/consumer.h>
|
||||
#include <linux/i2c.h>
|
||||
#include <linux/input.h>
|
||||
#include <linux/input/touchscreen.h>
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/irq.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/regulator/consumer.h>
|
||||
#include <linux/timer.h>
|
||||
|
||||
/*
|
||||
* HW_ID1 Register (PAGE=0, ADDR=0x0E, Reset value=0x02, Read only)
|
||||
* +--------+--------+--------+--------+--------+--------+--------+--------+
|
||||
* | D7 | D6 | D5 | D4 | D3 | D2 | D1 | D0 |
|
||||
* +--------+--------+--------+--------+--------+--------+--------+--------+
|
||||
* | HW_IDH |
|
||||
* +--------+--------+--------+--------+--------+--------+--------+--------+
|
||||
* HW_ID2 Register (PAGE=0, ADDR=0x0F, Reset value=0x29, Read only)
|
||||
* +--------+--------+--------+--------+--------+--------+--------+--------+
|
||||
* | D7 | D6 | D5 | D4 | D3 | D2 | D1 | D0 |
|
||||
* +--------+--------+--------+--------+--------+--------+--------+--------+
|
||||
* | HW_IDL |
|
||||
* +--------+--------+--------+--------+--------+--------+--------+--------+
|
||||
* HW_IDH: high 8bits of IC's ID
|
||||
* HW_IDL: low 8bits of IC's ID
|
||||
*/
|
||||
#define BU21029_HWID_REG (0x0E << 3)
|
||||
#define SUPPORTED_HWID 0x0229
|
||||
|
||||
/*
|
||||
* CFR0 Register (PAGE=0, ADDR=0x00, Reset value=0x20)
|
||||
* +--------+--------+--------+--------+--------+--------+--------+--------+
|
||||
* | D7 | D6 | D5 | D4 | D3 | D2 | D1 | D0 |
|
||||
* +--------+--------+--------+--------+--------+--------+--------+--------+
|
||||
* | 0 | 0 | CALIB | INTRM | 0 | 0 | 0 | 0 |
|
||||
* +--------+--------+--------+--------+--------+--------+--------+--------+
|
||||
* CALIB: 0 = not to use calibration result (*)
|
||||
* 1 = use calibration result
|
||||
* INTRM: 0 = INT output depend on "pen down" (*)
|
||||
* 1 = INT output always "0"
|
||||
*/
|
||||
#define BU21029_CFR0_REG (0x00 << 3)
|
||||
#define CFR0_VALUE 0x00
|
||||
|
||||
/*
|
||||
* CFR1 Register (PAGE=0, ADDR=0x01, Reset value=0xA6)
|
||||
* +--------+--------+--------+--------+--------+--------+--------+--------+
|
||||
* | D7 | D6 | D5 | D4 | D3 | D2 | D1 | D0 |
|
||||
* +--------+--------+--------+--------+--------+--------+--------+--------+
|
||||
* | MAV | AVE[2:0] | 0 | SMPL[2:0] |
|
||||
* +--------+--------+--------+--------+--------+--------+--------+--------+
|
||||
* MAV: 0 = median average filter off
|
||||
* 1 = median average filter on (*)
|
||||
* AVE: AVE+1 = number of average samples for MAV,
|
||||
* if AVE>SMPL, then AVE=SMPL (=3)
|
||||
* SMPL: SMPL+1 = number of conversion samples for MAV (=7)
|
||||
*/
|
||||
#define BU21029_CFR1_REG (0x01 << 3)
|
||||
#define CFR1_VALUE 0xA6
|
||||
|
||||
/*
|
||||
* CFR2 Register (PAGE=0, ADDR=0x02, Reset value=0x04)
|
||||
* +--------+--------+--------+--------+--------+--------+--------+--------+
|
||||
* | D7 | D6 | D5 | D4 | D3 | D2 | D1 | D0 |
|
||||
* +--------+--------+--------+--------+--------+--------+--------+--------+
|
||||
* | INTVL_TIME[3:0] | TIME_ST_ADC[3:0] |
|
||||
* +--------+--------+--------+--------+--------+--------+--------+--------+
|
||||
* INTVL_TIME: waiting time between completion of conversion
|
||||
* and start of next conversion, only usable in
|
||||
* autoscan mode (=20.480ms)
|
||||
* TIME_ST_ADC: waiting time between application of voltage
|
||||
* to panel and start of A/D conversion (=100us)
|
||||
*/
|
||||
#define BU21029_CFR2_REG (0x02 << 3)
|
||||
#define CFR2_VALUE 0xC9
|
||||
|
||||
/*
|
||||
* CFR3 Register (PAGE=0, ADDR=0x0B, Reset value=0x72)
|
||||
* +--------+--------+--------+--------+--------+--------+--------+--------+
|
||||
* | D7 | D6 | D5 | D4 | D3 | D2 | D1 | D0 |
|
||||
* +--------+--------+--------+--------+--------+--------+--------+--------+
|
||||
* | RM8 | STRETCH| PU90K | DUAL | PIDAC_OFS[3:0] |
|
||||
* +--------+--------+--------+--------+--------+--------+--------+--------+
|
||||
* RM8: 0 = coordinate resolution is 12bit (*)
|
||||
* 1 = coordinate resolution is 8bit
|
||||
* STRETCH: 0 = SCL_STRETCH function off
|
||||
* 1 = SCL_STRETCH function on (*)
|
||||
* PU90K: 0 = internal pull-up resistance for touch detection is ~50kohms (*)
|
||||
* 1 = internal pull-up resistance for touch detection is ~90kohms
|
||||
* DUAL: 0 = dual touch detection off (*)
|
||||
* 1 = dual touch detection on
|
||||
* PIDAC_OFS: dual touch detection circuit adjustment, it is not necessary
|
||||
* to change this from initial value
|
||||
*/
|
||||
#define BU21029_CFR3_REG (0x0B << 3)
|
||||
#define CFR3_VALUE 0x42
|
||||
|
||||
/*
|
||||
* LDO Register (PAGE=0, ADDR=0x0C, Reset value=0x00)
|
||||
* +--------+--------+--------+--------+--------+--------+--------+--------+
|
||||
* | D7 | D6 | D5 | D4 | D3 | D2 | D1 | D0 |
|
||||
* +--------+--------+--------+--------+--------+--------+--------+--------+
|
||||
* | 0 | PVDD[2:0] | 0 | AVDD[2:0] |
|
||||
* +--------+--------+--------+--------+--------+--------+--------+--------+
|
||||
* PVDD: output voltage of panel output regulator (=2.000V)
|
||||
* AVDD: output voltage of analog circuit regulator (=2.000V)
|
||||
*/
|
||||
#define BU21029_LDO_REG (0x0C << 3)
|
||||
#define LDO_VALUE 0x77
|
||||
|
||||
/*
|
||||
* Serial Interface Command Byte 1 (CID=1)
|
||||
* +--------+--------+--------+--------+--------+--------+--------+--------+
|
||||
* | D7 | D6 | D5 | D4 | D3 | D2 | D1 | D0 |
|
||||
* +--------+--------+--------+--------+--------+--------+--------+--------+
|
||||
* | 1 | CF | CMSK | PDM | STP |
|
||||
* +--------+--------+--------+--------+--------+--------+--------+--------+
|
||||
* CF: conversion function, see table 3 in datasheet p6 (=0000, automatic scan)
|
||||
* CMSK: 0 = executes convert function (*)
|
||||
* 1 = reads the convert result
|
||||
* PDM: 0 = power down after convert function stops (*)
|
||||
* 1 = keep power on after convert function stops
|
||||
* STP: 1 = abort current conversion and power down, set to "0" automatically
|
||||
*/
|
||||
#define BU21029_AUTOSCAN 0x80
|
||||
|
||||
/*
|
||||
* The timeout value needs to be larger than INTVL_TIME + tConv4 (sample and
|
||||
* conversion time), where tConv4 is calculated by formula:
|
||||
* tPON + tDLY1 + (tTIME_ST_ADC + (tADC * tSMPL) * 2 + tDLY2) * 3
|
||||
* see figure 8 in datasheet p15 for details of each field.
|
||||
*/
|
||||
#define PEN_UP_TIMEOUT_MS 50
|
||||
|
||||
#define STOP_DELAY_MIN_US 50
|
||||
#define STOP_DELAY_MAX_US 1000
|
||||
#define START_DELAY_MS 2
|
||||
#define BUF_LEN 8
|
||||
#define SCALE_12BIT (1 << 12)
|
||||
#define MAX_12BIT ((1 << 12) - 1)
|
||||
#define DRIVER_NAME "bu21029"
|
||||
|
||||
struct bu21029_ts_data {
|
||||
struct i2c_client *client;
|
||||
struct input_dev *in_dev;
|
||||
struct timer_list timer;
|
||||
struct regulator *vdd;
|
||||
struct gpio_desc *reset_gpios;
|
||||
u32 x_plate_ohms;
|
||||
struct touchscreen_properties prop;
|
||||
};
|
||||
|
||||
static void bu21029_touch_report(struct bu21029_ts_data *bu21029, const u8 *buf)
|
||||
{
|
||||
u16 x, y, z1, z2;
|
||||
u32 rz;
|
||||
s32 max_pressure = input_abs_get_max(bu21029->in_dev, ABS_PRESSURE);
|
||||
|
||||
/*
|
||||
* compose upper 8 and lower 4 bits into a 12bit value:
|
||||
* +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
|
||||
* | ByteH | ByteL |
|
||||
* +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
|
||||
* |b07|b06|b05|b04|b03|b02|b01|b00|b07|b06|b05|b04|b03|b02|b01|b00|
|
||||
* +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
|
||||
* |v11|v10|v09|v08|v07|v06|v05|v04|v03|v02|v01|v00| 0 | 0 | 0 | 0 |
|
||||
* +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
|
||||
*/
|
||||
x = (buf[0] << 4) | (buf[1] >> 4);
|
||||
y = (buf[2] << 4) | (buf[3] >> 4);
|
||||
z1 = (buf[4] << 4) | (buf[5] >> 4);
|
||||
z2 = (buf[6] << 4) | (buf[7] >> 4);
|
||||
|
||||
if (z1 && z2) {
|
||||
/*
|
||||
* calculate Rz (pressure resistance value) by equation:
|
||||
* Rz = Rx * (x/Q) * ((z2/z1) - 1), where
|
||||
* Rx is x-plate resistance,
|
||||
* Q is the touch screen resolution (8bit = 256, 12bit = 4096)
|
||||
* x, z1, z2 are the measured positions.
|
||||
*/
|
||||
rz = z2 - z1;
|
||||
rz *= x;
|
||||
rz *= bu21029->x_plate_ohms;
|
||||
rz /= z1;
|
||||
rz = DIV_ROUND_CLOSEST(rz, SCALE_12BIT);
|
||||
if (rz <= max_pressure) {
|
||||
touchscreen_report_pos(bu21029->in_dev, &bu21029->prop,
|
||||
x, y, false);
|
||||
input_report_abs(bu21029->in_dev, ABS_PRESSURE,
|
||||
max_pressure - rz);
|
||||
input_report_key(bu21029->in_dev, BTN_TOUCH, 1);
|
||||
input_sync(bu21029->in_dev);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static void bu21029_touch_release(struct timer_list *t)
|
||||
{
|
||||
struct bu21029_ts_data *bu21029 = from_timer(bu21029, t, timer);
|
||||
|
||||
input_report_abs(bu21029->in_dev, ABS_PRESSURE, 0);
|
||||
input_report_key(bu21029->in_dev, BTN_TOUCH, 0);
|
||||
input_sync(bu21029->in_dev);
|
||||
}
|
||||
|
||||
static irqreturn_t bu21029_touch_soft_irq(int irq, void *data)
|
||||
{
|
||||
struct bu21029_ts_data *bu21029 = data;
|
||||
u8 buf[BUF_LEN];
|
||||
int error;
|
||||
|
||||
/*
|
||||
* Read touch data and deassert interrupt (will assert again after
|
||||
* INTVL_TIME + tConv4 for continuous touch)
|
||||
*/
|
||||
error = i2c_smbus_read_i2c_block_data(bu21029->client, BU21029_AUTOSCAN,
|
||||
sizeof(buf), buf);
|
||||
if (error < 0)
|
||||
goto out;
|
||||
|
||||
bu21029_touch_report(bu21029, buf);
|
||||
|
||||
/* reset timer for pen up detection */
|
||||
mod_timer(&bu21029->timer,
|
||||
jiffies + msecs_to_jiffies(PEN_UP_TIMEOUT_MS));
|
||||
|
||||
out:
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static void bu21029_put_chip_in_reset(struct bu21029_ts_data *bu21029)
|
||||
{
|
||||
if (bu21029->reset_gpios) {
|
||||
gpiod_set_value_cansleep(bu21029->reset_gpios, 1);
|
||||
usleep_range(STOP_DELAY_MIN_US, STOP_DELAY_MAX_US);
|
||||
}
|
||||
}
|
||||
|
||||
static int bu21029_start_chip(struct input_dev *dev)
|
||||
{
|
||||
struct bu21029_ts_data *bu21029 = input_get_drvdata(dev);
|
||||
struct i2c_client *i2c = bu21029->client;
|
||||
struct {
|
||||
u8 reg;
|
||||
u8 value;
|
||||
} init_table[] = {
|
||||
{BU21029_CFR0_REG, CFR0_VALUE},
|
||||
{BU21029_CFR1_REG, CFR1_VALUE},
|
||||
{BU21029_CFR2_REG, CFR2_VALUE},
|
||||
{BU21029_CFR3_REG, CFR3_VALUE},
|
||||
{BU21029_LDO_REG, LDO_VALUE}
|
||||
};
|
||||
int error, i;
|
||||
__be16 hwid;
|
||||
|
||||
error = regulator_enable(bu21029->vdd);
|
||||
if (error) {
|
||||
dev_err(&i2c->dev, "failed to power up chip: %d", error);
|
||||
return error;
|
||||
}
|
||||
|
||||
/* take chip out of reset */
|
||||
if (bu21029->reset_gpios) {
|
||||
gpiod_set_value_cansleep(bu21029->reset_gpios, 0);
|
||||
msleep(START_DELAY_MS);
|
||||
}
|
||||
|
||||
error = i2c_smbus_read_i2c_block_data(i2c, BU21029_HWID_REG,
|
||||
sizeof(hwid), (u8 *)&hwid);
|
||||
if (error < 0) {
|
||||
dev_err(&i2c->dev, "failed to read HW ID\n");
|
||||
goto err_out;
|
||||
}
|
||||
|
||||
if (be16_to_cpu(hwid) != SUPPORTED_HWID) {
|
||||
dev_err(&i2c->dev,
|
||||
"unsupported HW ID 0x%x\n", be16_to_cpu(hwid));
|
||||
error = -ENODEV;
|
||||
goto err_out;
|
||||
}
|
||||
|
||||
for (i = 0; i < ARRAY_SIZE(init_table); ++i) {
|
||||
error = i2c_smbus_write_byte_data(i2c,
|
||||
init_table[i].reg,
|
||||
init_table[i].value);
|
||||
if (error < 0) {
|
||||
dev_err(&i2c->dev,
|
||||
"failed to write %#02x to register %#02x: %d\n",
|
||||
init_table[i].value, init_table[i].reg,
|
||||
error);
|
||||
goto err_out;
|
||||
}
|
||||
}
|
||||
|
||||
error = i2c_smbus_write_byte(i2c, BU21029_AUTOSCAN);
|
||||
if (error < 0) {
|
||||
dev_err(&i2c->dev, "failed to start autoscan\n");
|
||||
goto err_out;
|
||||
}
|
||||
|
||||
enable_irq(bu21029->client->irq);
|
||||
return 0;
|
||||
|
||||
err_out:
|
||||
bu21029_put_chip_in_reset(bu21029);
|
||||
regulator_disable(bu21029->vdd);
|
||||
return error;
|
||||
}
|
||||
|
||||
static void bu21029_stop_chip(struct input_dev *dev)
|
||||
{
|
||||
struct bu21029_ts_data *bu21029 = input_get_drvdata(dev);
|
||||
|
||||
disable_irq(bu21029->client->irq);
|
||||
del_timer_sync(&bu21029->timer);
|
||||
|
||||
bu21029_put_chip_in_reset(bu21029);
|
||||
regulator_disable(bu21029->vdd);
|
||||
}
|
||||
|
||||
static int bu21029_probe(struct i2c_client *client,
|
||||
const struct i2c_device_id *id)
|
||||
{
|
||||
struct bu21029_ts_data *bu21029;
|
||||
struct input_dev *in_dev;
|
||||
int error;
|
||||
|
||||
if (!i2c_check_functionality(client->adapter,
|
||||
I2C_FUNC_SMBUS_WRITE_BYTE |
|
||||
I2C_FUNC_SMBUS_WRITE_BYTE_DATA |
|
||||
I2C_FUNC_SMBUS_READ_I2C_BLOCK)) {
|
||||
dev_err(&client->dev,
|
||||
"i2c functionality support is not sufficient\n");
|
||||
return -EIO;
|
||||
}
|
||||
|
||||
bu21029 = devm_kzalloc(&client->dev, sizeof(*bu21029), GFP_KERNEL);
|
||||
if (!bu21029)
|
||||
return -ENOMEM;
|
||||
|
||||
error = device_property_read_u32(&client->dev, "rohm,x-plate-ohms",
|
||||
&bu21029->x_plate_ohms);
|
||||
if (error) {
|
||||
dev_err(&client->dev,
|
||||
"invalid 'x-plate-ohms' supplied: %d\n", error);
|
||||
return error;
|
||||
}
|
||||
|
||||
bu21029->vdd = devm_regulator_get(&client->dev, "vdd");
|
||||
if (IS_ERR(bu21029->vdd)) {
|
||||
error = PTR_ERR(bu21029->vdd);
|
||||
if (error != -EPROBE_DEFER)
|
||||
dev_err(&client->dev,
|
||||
"failed to acquire 'vdd' supply: %d\n", error);
|
||||
return error;
|
||||
}
|
||||
|
||||
bu21029->reset_gpios = devm_gpiod_get_optional(&client->dev,
|
||||
"reset", GPIOD_OUT_HIGH);
|
||||
if (IS_ERR(bu21029->reset_gpios)) {
|
||||
error = PTR_ERR(bu21029->reset_gpios);
|
||||
if (error != -EPROBE_DEFER)
|
||||
dev_err(&client->dev,
|
||||
"failed to acquire 'reset' gpio: %d\n", error);
|
||||
return error;
|
||||
}
|
||||
|
||||
in_dev = devm_input_allocate_device(&client->dev);
|
||||
if (!in_dev) {
|
||||
dev_err(&client->dev, "unable to allocate input device\n");
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
bu21029->client = client;
|
||||
bu21029->in_dev = in_dev;
|
||||
timer_setup(&bu21029->timer, bu21029_touch_release, 0);
|
||||
|
||||
in_dev->name = DRIVER_NAME;
|
||||
in_dev->id.bustype = BUS_I2C;
|
||||
in_dev->open = bu21029_start_chip;
|
||||
in_dev->close = bu21029_stop_chip;
|
||||
|
||||
input_set_capability(in_dev, EV_KEY, BTN_TOUCH);
|
||||
input_set_abs_params(in_dev, ABS_X, 0, MAX_12BIT, 0, 0);
|
||||
input_set_abs_params(in_dev, ABS_Y, 0, MAX_12BIT, 0, 0);
|
||||
input_set_abs_params(in_dev, ABS_PRESSURE, 0, MAX_12BIT, 0, 0);
|
||||
touchscreen_parse_properties(in_dev, false, &bu21029->prop);
|
||||
|
||||
input_set_drvdata(in_dev, bu21029);
|
||||
|
||||
irq_set_status_flags(client->irq, IRQ_NOAUTOEN);
|
||||
error = devm_request_threaded_irq(&client->dev, client->irq,
|
||||
NULL, bu21029_touch_soft_irq,
|
||||
IRQF_ONESHOT, DRIVER_NAME, bu21029);
|
||||
if (error) {
|
||||
dev_err(&client->dev,
|
||||
"unable to request touch irq: %d\n", error);
|
||||
return error;
|
||||
}
|
||||
|
||||
error = input_register_device(in_dev);
|
||||
if (error) {
|
||||
dev_err(&client->dev,
|
||||
"unable to register input device: %d\n", error);
|
||||
return error;
|
||||
}
|
||||
|
||||
i2c_set_clientdata(client, bu21029);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int __maybe_unused bu21029_suspend(struct device *dev)
|
||||
{
|
||||
struct i2c_client *i2c = to_i2c_client(dev);
|
||||
struct bu21029_ts_data *bu21029 = i2c_get_clientdata(i2c);
|
||||
|
||||
if (!device_may_wakeup(dev)) {
|
||||
mutex_lock(&bu21029->in_dev->mutex);
|
||||
if (bu21029->in_dev->users)
|
||||
bu21029_stop_chip(bu21029->in_dev);
|
||||
mutex_unlock(&bu21029->in_dev->mutex);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int __maybe_unused bu21029_resume(struct device *dev)
|
||||
{
|
||||
struct i2c_client *i2c = to_i2c_client(dev);
|
||||
struct bu21029_ts_data *bu21029 = i2c_get_clientdata(i2c);
|
||||
|
||||
if (!device_may_wakeup(dev)) {
|
||||
mutex_lock(&bu21029->in_dev->mutex);
|
||||
if (bu21029->in_dev->users)
|
||||
bu21029_start_chip(bu21029->in_dev);
|
||||
mutex_unlock(&bu21029->in_dev->mutex);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
static SIMPLE_DEV_PM_OPS(bu21029_pm_ops, bu21029_suspend, bu21029_resume);
|
||||
|
||||
static const struct i2c_device_id bu21029_ids[] = {
|
||||
{ DRIVER_NAME, 0 },
|
||||
{ /* sentinel */ }
|
||||
};
|
||||
MODULE_DEVICE_TABLE(i2c, bu21029_ids);
|
||||
|
||||
#ifdef CONFIG_OF
|
||||
static const struct of_device_id bu21029_of_ids[] = {
|
||||
{ .compatible = "rohm,bu21029" },
|
||||
{ /* sentinel */ }
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, bu21029_of_ids);
|
||||
#endif
|
||||
|
||||
static struct i2c_driver bu21029_driver = {
|
||||
.driver = {
|
||||
.name = DRIVER_NAME,
|
||||
.of_match_table = of_match_ptr(bu21029_of_ids),
|
||||
.pm = &bu21029_pm_ops,
|
||||
},
|
||||
.id_table = bu21029_ids,
|
||||
.probe = bu21029_probe,
|
||||
};
|
||||
module_i2c_driver(bu21029_driver);
|
||||
|
||||
MODULE_AUTHOR("Zhu Yi <yi.zhu5@cn.bosch.com>");
|
||||
MODULE_DESCRIPTION("Rohm BU21029 touchscreen controller driver");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
Loading…
Reference in New Issue
Block a user