From 102a0743326a03cd1a1202ceda21e175b7d3575c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:20:52 +0000
Subject: [PATCH] add new system file
---
kernel/drivers/input/keyboard/mpr121_touchkey.c | 78 ++++++++++++++++++++++++++------------
1 files changed, 53 insertions(+), 25 deletions(-)
diff --git a/kernel/drivers/input/keyboard/mpr121_touchkey.c b/kernel/drivers/input/keyboard/mpr121_touchkey.c
index 884a74d..40d6e50 100644
--- a/kernel/drivers/input/keyboard/mpr121_touchkey.c
+++ b/kernel/drivers/input/keyboard/mpr121_touchkey.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* Touchkey driver for Freescale MPR121 Controllor
*
@@ -5,11 +6,6 @@
* Author: Zhang Jiejing <jiejing.zhang@freescale.com>
*
* Based on mcs_touchkey.c
- *
- * 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/bitops.h>
@@ -57,6 +53,9 @@
#define TOUCH_STATUS_MASK 0xfff
/* MPR121 has 12 keys */
#define MPR121_MAX_KEY_COUNT 12
+
+#define MPR121_MIN_POLL_INTERVAL 10
+#define MPR121_MAX_POLL_INTERVAL 200
struct mpr121_touchkey {
struct i2c_client *client;
@@ -119,11 +118,11 @@
return vdd_supply;
}
-static irqreturn_t mpr_touchkey_interrupt(int irq, void *dev_id)
+static void mpr_touchkey_report(struct input_dev *dev)
{
- struct mpr121_touchkey *mpr121 = dev_id;
- struct i2c_client *client = mpr121->client;
+ struct mpr121_touchkey *mpr121 = input_get_drvdata(dev);
struct input_dev *input = mpr121->input_dev;
+ struct i2c_client *client = mpr121->client;
unsigned long bit_changed;
unsigned int key_num;
int reg;
@@ -131,14 +130,14 @@
reg = i2c_smbus_read_byte_data(client, ELE_TOUCH_STATUS_1_ADDR);
if (reg < 0) {
dev_err(&client->dev, "i2c read error [%d]\n", reg);
- goto out;
+ return;
}
reg <<= 8;
reg |= i2c_smbus_read_byte_data(client, ELE_TOUCH_STATUS_0_ADDR);
if (reg < 0) {
dev_err(&client->dev, "i2c read error [%d]\n", reg);
- goto out;
+ return;
}
reg &= TOUCH_STATUS_MASK;
@@ -159,8 +158,14 @@
}
input_sync(input);
+}
-out:
+static irqreturn_t mpr_touchkey_interrupt(int irq, void *dev_id)
+{
+ struct mpr121_touchkey *mpr121 = dev_id;
+
+ mpr_touchkey_report(mpr121->input_dev);
+
return IRQ_HANDLED;
}
@@ -233,13 +238,9 @@
int vdd_uv;
struct mpr121_touchkey *mpr121;
struct input_dev *input_dev;
+ u32 poll_interval = 0;
int error;
int i;
-
- if (!client->irq) {
- dev_err(dev, "irq number should not be zero\n");
- return -EINVAL;
- }
vdd_supply = mpr121_vdd_supply_init(dev);
if (IS_ERR(vdd_supply))
@@ -257,8 +258,7 @@
mpr121->client = client;
mpr121->input_dev = input_dev;
- mpr121->keycount = device_property_read_u32_array(dev, "linux,keycodes",
- NULL, 0);
+ mpr121->keycount = device_property_count_u32(dev, "linux,keycodes");
if (mpr121->keycount > MPR121_MAX_KEY_COUNT) {
dev_err(dev, "too many keys defined (%d)\n", mpr121->keycount);
return -EINVAL;
@@ -279,6 +279,7 @@
if (device_property_read_bool(dev, "autorepeat"))
__set_bit(EV_REP, input_dev->evbit);
input_set_capability(input_dev, EV_MSC, MSC_SCAN);
+ input_set_drvdata(input_dev, mpr121);
input_dev->keycode = mpr121->keycodes;
input_dev->keycodesize = sizeof(mpr121->keycodes[0]);
@@ -293,13 +294,40 @@
return error;
}
- error = devm_request_threaded_irq(dev, client->irq, NULL,
- mpr_touchkey_interrupt,
- IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
- dev->driver->name, mpr121);
- if (error) {
- dev_err(dev, "Failed to register interrupt\n");
- return error;
+ device_property_read_u32(dev, "poll-interval", &poll_interval);
+
+ if (client->irq) {
+ error = devm_request_threaded_irq(dev, client->irq, NULL,
+ mpr_touchkey_interrupt,
+ IRQF_TRIGGER_FALLING |
+ IRQF_ONESHOT,
+ dev->driver->name, mpr121);
+ if (error) {
+ dev_err(dev, "Failed to register interrupt\n");
+ return error;
+ }
+ } else if (poll_interval) {
+ if (poll_interval < MPR121_MIN_POLL_INTERVAL)
+ return -EINVAL;
+
+ if (poll_interval > MPR121_MAX_POLL_INTERVAL)
+ return -EINVAL;
+
+ error = input_setup_polling(input_dev, mpr_touchkey_report);
+ if (error) {
+ dev_err(dev, "Failed to setup polling\n");
+ return error;
+ }
+
+ input_set_poll_interval(input_dev, poll_interval);
+ input_set_min_poll_interval(input_dev,
+ MPR121_MIN_POLL_INTERVAL);
+ input_set_max_poll_interval(input_dev,
+ MPR121_MAX_POLL_INTERVAL);
+ } else {
+ dev_err(dev,
+ "invalid IRQ number and polling not configured\n");
+ return -EINVAL;
}
error = input_register_device(input_dev);
--
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