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Input: mms114 - support MMS136 

The Melfas MMS136 is similar to the other MMS variants but
has event packages of 6 bytes rather than 8 as the others.

The define is named FINGER_EVENT_SZ in the vendor drivers
so I renamed it from MMS*_PACKET_SZ to MMS*_EVENT_SZ.

After this patch, the touchscreen on the Samsung GT-I8530
works fine with PostmarketOS.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20210404232619.3092682-1-linus.walleij@linaro.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Linus Walleij 2021-04-09 23:04:35 -07:00 committed by Dmitry Torokhov
parent a811ecf8f1
commit 53fefdd1d3
1 changed files with 16 additions and 6 deletions
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22
drivers/input/touchscreen/mms114.c
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@ -1,5 +1,5 @@
// SPDX-License-Identifier: GPL-2.0
// Melfas MMS114/MMS152 touchscreen device driver
// Melfas MMS114/MMS136/MMS152 touchscreen device driver
//
// Copyright (c) 2012 Samsung Electronics Co., Ltd.
// Author: Joonyoung Shim <jy0922.shim@samsung.com>
@ -44,7 +44,8 @@
#define MMS114_MAX_AREA 0xff
#define MMS114_MAX_TOUCH 10
#define MMS114_PACKET_NUM 8
#define MMS114_EVENT_SIZE 8
#define MMS136_EVENT_SIZE 6
/* Touch type */
#define MMS114_TYPE_NONE 0
@ -53,6 +54,7 @@
enum mms_type {
TYPE_MMS114 = 114,
TYPE_MMS136 = 136,
TYPE_MMS152 = 152,
TYPE_MMS345L = 345,
};
@ -209,7 +211,11 @@ static irqreturn_t mms114_interrupt(int irq, void *dev_id)
if (packet_size <= 0)
goto out;
touch_size = packet_size / MMS114_PACKET_NUM;
/* MMS136 has slightly different event size */
if (data->type == TYPE_MMS136)
touch_size = packet_size / MMS136_EVENT_SIZE;
else
touch_size = packet_size / MMS114_EVENT_SIZE;
error = __mms114_read_reg(data, MMS114_INFORMATION, packet_size,
(u8 *)touch);
@ -275,6 +281,7 @@ static int mms114_get_version(struct mms114_data *data)
break;
case TYPE_MMS114:
case TYPE_MMS136:
error = __mms114_read_reg(data, MMS114_TSP_REV, 6, buf);
if (error)
return error;
@ -297,8 +304,8 @@ static int mms114_setup_regs(struct mms114_data *data)
if (error < 0)
return error;
/* Only MMS114 has configuration and power on registers */
if (data->type != TYPE_MMS114)
/* Only MMS114 and MMS136 have configuration and power on registers */
if (data->type != TYPE_MMS114 && data->type != TYPE_MMS136)
return 0;
error = mms114_set_active(data, true);
@ -480,7 +487,7 @@ static int mms114_probe(struct i2c_client *client,
0, data->props.max_y, 0, 0);
}
if (data->type == TYPE_MMS114) {
if (data->type == TYPE_MMS114 || data->type == TYPE_MMS136) {
/*
* The firmware handles movement and pressure fuzz, so
* don't duplicate that in software.
@ -604,6 +611,9 @@ static const struct of_device_id mms114_dt_match[] = {
{
.compatible = "melfas,mms114",
.data = (void *)TYPE_MMS114,
}, {
.compatible = "melfas,mms136",
.data = (void *)TYPE_MMS136,
}, {
.compatible = "melfas,mms152",
.data = (void *)TYPE_MMS152,