From: Jiada Wang <jiada_wang@mentor.com>
To: <jikos@kernel.org>, <benjamin.tissoires@redhat.com>,
<rydberg@bitmath.org>, <dmitry.torokhov@gmail.com>,
<nick@shmanahar.org>
Cc: <linux-input@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<jiada_wang@mentor.com>, <erosca@de.adit-jv.com>,
<Andrew_Gabbasov@mentor.com>
Subject: [PATCH v5 45/48] input: touchscreen: atmel_mxt_ts: Added sysfs entry for touchscreen status
Date: Wed, 6 Nov 2019 16:01:43 +0900 [thread overview]
Message-ID: <20191106070146.18759-46-jiada_wang@mentor.com> (raw)
In-Reply-To: <20191106070146.18759-1-jiada_wang@mentor.com>
From: Naveen Chakka <Naveen.Chakka@in.bosch.com>
To know the current communication status of the touch controller during
runtime, sysfs interface is added
sysfs interface: /sys/class/i2c-dev/i2c-*/device/*/touch_dev_stat
Executing the above sysfs interface provides two output values
1)Status of the touch device
value 0 represents device is inactive
value 1 represents device is active
2)Error counter
value represents the number of times device in inactive since last read
Signed-off-by: Naveen Chakka <Naveen.Chakka@in.bosch.com>
Signed-off-by: Sanjeev Chugh <sanjeev_chugh@mentor.com>
Signed-off-by: George G. Davis <george_davis@mentor.com>
Signed-off-by: Jiada Wang <jiada_wang@mentor.com>
---
drivers/input/touchscreen/atmel_mxt_ts.c | 109 +++++++++++++++++++++--
1 file changed, 102 insertions(+), 7 deletions(-)
diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index 78903806c0b4..d22a00ec69c1 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -25,6 +25,7 @@
#include <linux/property.h>
#include <linux/slab.h>
#include <linux/gpio/consumer.h>
+#include <linux/timer.h>
#include <asm/unaligned.h>
#include <linux/regulator/consumer.h>
#include <linux/workqueue.h>
@@ -222,6 +223,7 @@ enum t100_type {
#define MXT_CHG_DELAY 100 /* msec */
#define MXT_POWERON_DELAY 150 /* msec */
#define MXT_BOOTLOADER_WAIT 36E5 /* 1 minute */
+#define MXT_WATCHDOG_TIMEOUT 1000 /* msec */
/* Command to unlock bootloader */
#define MXT_UNLOCK_CMD_MSB 0xaa
@@ -317,6 +319,12 @@ struct mxt_flash {
struct delayed_work work;
};
+struct mxt_statusinfo {
+ bool dev_status;
+ bool intp_triggered;
+ u32 error_count;
+};
+
/* Each client has this additional data */
struct mxt_data {
struct i2c_client *client;
@@ -372,6 +380,9 @@ struct mxt_data {
const char *pcfg_name;
const char *input_name;
struct mxt_flash *flash;
+ struct work_struct watchdog_work;
+ struct timer_list watchdog_timer;
+ struct mxt_statusinfo mxt_status;
/* Cached parameters from object table */
u16 T5_address;
@@ -1624,11 +1635,30 @@ static int mxt_process_messages(struct mxt_data *data)
return total_handled;
}
+static void mxt_start_wd_timer(struct mxt_data *data)
+{
+ mod_timer(&data->watchdog_timer, jiffies +
+ msecs_to_jiffies(MXT_WATCHDOG_TIMEOUT));
+}
+
+static void mxt_stop_wd_timer(struct mxt_data *data)
+{
+ /*
+ * Ensure we wait until the watchdog timer
+ * running on a different CPU finishes
+ */
+ del_timer_sync(&data->watchdog_timer);
+ cancel_work_sync(&data->watchdog_work);
+ del_timer_sync(&data->watchdog_timer);
+}
+
static irqreturn_t mxt_interrupt(int irq, void *dev_id)
{
struct mxt_data *data = dev_id;
int ret;
+ data->mxt_status.intp_triggered = true;
+
if (data->in_bootloader) {
complete(&data->chg_completion);
@@ -1636,21 +1666,25 @@ static irqreturn_t mxt_interrupt(int irq, void *dev_id)
cancel_delayed_work_sync(&data->flash->work);
ret = mxt_check_bootloader(data);
- return IRQ_RETVAL(ret);
+ ret = IRQ_RETVAL(ret);
+ goto exit;
}
- if (!data->object_table)
- return IRQ_HANDLED;
+ if (!data->object_table) {
+ ret = IRQ_HANDLED;
+ goto exit;
+ }
if (data->T44_address)
ret = mxt_process_messages_t44(data);
else
ret = mxt_process_messages(data);
- if (ret <= 0)
- return IRQ_NONE;
- else
- return IRQ_HANDLED;
+ ret = (ret <= 0) ? IRQ_NONE : IRQ_HANDLED;
+
+exit:
+ data->mxt_status.intp_triggered = false;
+ return ret;
}
static int mxt_t6_command(struct mxt_data *data, u16 cmd_offset,
@@ -2970,6 +3004,36 @@ static int mxt_bootloader_status(struct mxt_data *data)
return 0;
}
+static void mxt_watchdog_timer(struct timer_list *t)
+{
+ struct mxt_data *data = from_timer(data, t, watchdog_timer);
+
+ if (!work_pending(&data->watchdog_work)) {
+ if (!data->mxt_status.intp_triggered)
+ schedule_work(&data->watchdog_work);
+ }
+
+ mxt_start_wd_timer(data);
+}
+
+static void mxt_watchdog_work(struct work_struct *work)
+{
+ struct mxt_data *data =
+ container_of(work, struct mxt_data, watchdog_work);
+ u16 info_buf;
+ int ret = 0;
+ u8 size = 2;
+
+ ret = __mxt_read_reg(data->client, 0, size, &info_buf);
+
+ if (ret) {
+ data->mxt_status.error_count++;
+ data->mxt_status.dev_status = false;
+ } else {
+ data->mxt_status.dev_status = true;
+ }
+}
+
static int mxt_initialize(struct mxt_data *data)
{
struct i2c_client *client = data->client;
@@ -3947,6 +4011,22 @@ static const struct attribute_group mxt_fw_attr_group = {
.attrs = mxt_fw_attrs,
};
+static ssize_t mxt_touch_device_status(struct device *dev, struct
+ device_attribute *attr, char *buf)
+{
+ struct mxt_data *data = dev_get_drvdata(dev);
+ int ret = 0;
+
+ if (data->mxt_status.dev_status)
+ data->mxt_status.error_count = 0;
+
+ ret = snprintf(buf, PAGE_SIZE, "%d %d\n", data->mxt_status.dev_status,
+ data->mxt_status.error_count);
+ /* clear the error counter once it is read */
+ data->mxt_status.error_count = 0;
+ return ret;
+}
+
static DEVICE_ATTR(fw_version, S_IRUGO, mxt_fw_version_show, NULL);
static DEVICE_ATTR(hw_version, S_IRUGO, mxt_hw_version_show, NULL);
static DEVICE_ATTR(object, S_IRUGO, mxt_object_show, NULL);
@@ -3958,6 +4038,7 @@ static DEVICE_ATTR(debug_v2_enable, S_IWUSR | S_IRUSR, NULL,
mxt_debug_v2_enable_store);
static DEVICE_ATTR(debug_notify, S_IRUGO, mxt_debug_notify_show, NULL);
static DEVICE_ATTR(t25, 0600, mxt_t25_selftest_show, mxt_t25_selftest_store);
+static DEVICE_ATTR(touch_dev_stat, 0444, mxt_touch_device_status, NULL);
static struct attribute *mxt_attrs[] = {
&dev_attr_fw_version.attr,
@@ -3969,6 +4050,7 @@ static struct attribute *mxt_attrs[] = {
&dev_attr_debug_v2_enable.attr,
&dev_attr_debug_notify.attr,
&dev_attr_t25.attr,
+ &dev_attr_touch_dev_stat.attr,
NULL
};
@@ -4321,6 +4403,13 @@ static int mxt_probe(struct i2c_client *client, const struct i2c_device_id *id)
msleep(MXT_RESET_TIME);
}
+ INIT_WORK(&data->watchdog_work, mxt_watchdog_work);
+
+ /* setup watchdog timer */
+ timer_setup(&data->watchdog_timer, mxt_watchdog_timer, 0);
+
+ mxt_start_wd_timer(data);
+
error = mxt_initialize(data);
if (error)
goto err_free_object;
@@ -4335,8 +4424,11 @@ static int mxt_probe(struct i2c_client *client, const struct i2c_device_id *id)
return 0;
err_free_object:
+ cancel_work_sync(&data->watchdog_work);
+ mxt_stop_wd_timer(data);
mxt_free_input_device(data);
mxt_free_object_table(data);
+ del_timer(&data->watchdog_timer);
if (data->reset_gpio) {
sysfs_remove_link(&client->dev.kobj, "reset");
gpiod_unexport(data->reset_gpio);
@@ -4359,6 +4451,9 @@ static int mxt_remove(struct i2c_client *client)
mxt_free_input_device(data);
mxt_free_object_table(data);
+ cancel_work_sync(&data->watchdog_work);
+ mxt_stop_wd_timer(data);
+
return 0;
}
--
2.17.1
next prev parent reply other threads:[~2019-11-06 7:04 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-06 7:00 [PATCH v5 00/48] atmel_mxt_ts misc Jiada Wang
2019-11-06 7:00 ` [PATCH v5 01/48] Input: introduce input_mt_report_slot_inactive Jiada Wang
2019-11-06 21:11 ` Henrik Rydberg
2019-11-14 9:44 ` [Input] 9290ec3cea: suspend_stress.fail kernel test robot
2019-11-15 19:29 ` Dmitry Torokhov
2019-11-06 7:01 ` [PATCH v5 02/48] Input: atmel_mxt_ts - rework sysfs init/remove Jiada Wang
2019-11-06 7:01 ` [PATCH v5 03/48] Input: atmel_mxt_ts - only read messages in mxt_acquire_irq() when necessary Jiada Wang
2019-11-06 7:01 ` [PATCH v5 04/48] Input: atmel_mxt_ts - split large i2c transfers into blocks Jiada Wang
2019-11-06 7:01 ` [PATCH v5 05/48] Input: atmel_mxt_ts - output status from T48 Noise Supression Jiada Wang
2019-11-06 7:01 ` [PATCH v5 06/48] Input: atmel_mxt_ts - output status from T42 Touch Suppression Jiada Wang
2019-11-06 7:01 ` [PATCH v5 07/48] Input: atmel_mxt_ts - implement T9 vector/orientation support Jiada Wang
2019-11-06 7:01 ` [PATCH v5 08/48] Input: atmel_mxt_ts - implement T15 Key Array support Jiada Wang
2019-11-06 7:01 ` [PATCH v5 09/48] Input: atmel_mxt_ts - handle reports from T47 Stylus object Jiada Wang
2019-11-06 7:01 ` [PATCH v5 10/48] Input: atmel_mxt_ts - implement support for T107 active stylus Jiada Wang
2019-11-06 7:01 ` [PATCH v5 11/48] Input: atmel_mxt_ts - add debug for T92 gesture and T93 touch seq msgs Jiada Wang
2019-11-06 7:01 ` [PATCH v5 12/48] Input: atmel_mxt_ts - release touch state during suspend Jiada Wang
2019-11-06 7:01 ` [PATCH v5 13/48] Input: atmel_mxt_ts - add regulator control support Jiada Wang
2019-11-06 7:01 ` [PATCH v5 14/48] Input: atmel_mxt_ts - report failures in suspend/resume Jiada Wang
2019-11-06 7:01 ` [PATCH v5 15/48] Input: atmel_mxt_ts - allow specification of firmware file name Jiada Wang
2019-11-06 7:01 ` [PATCH v5 16/48] Input: atmel_mxt_ts - handle cfg filename via pdata/sysfs Jiada Wang
2019-11-06 7:01 ` [PATCH v5 17/48] Input: atmel_mxt_ts - allow input name to be specified in platform data Jiada Wang
2019-11-06 7:01 ` [PATCH v5 18/48] Input: atmel_mxt_ts - add config checksum attribute to sysfs Jiada Wang
2019-11-06 7:01 ` [PATCH v5 19/48] Input: atmel_mxt_ts - refactor firmware flash to extract context into struct Jiada Wang
2019-11-06 7:01 ` [PATCH v5 20/48] Input: atmel_mxt_ts - refactor code to enter bootloader into separate func Jiada Wang
2019-11-06 7:01 ` [PATCH v5 21/48] Input: atmel_mxt_ts - combine bootloader version query with probe Jiada Wang
2019-11-06 7:01 ` [PATCH v5 22/48] Input: atmel_mxt_ts - improve bootloader state machine handling Jiada Wang
2019-11-06 7:01 ` [PATCH v5 23/48] Input: atmel_mxt_ts - rename bl_completion to chg_completion Jiada Wang
2019-11-06 7:01 ` [PATCH v5 24/48] Input: atmel_mxt_ts - make bootloader interrupt driven Jiada Wang
2019-11-06 7:01 ` [PATCH v5 25/48] Input: atmel_mxt_ts - delay enabling IRQ when not using regulators Jiada Wang
2019-11-06 7:01 ` [PATCH v5 26/48] Input: atmel_mxt_ts - implement I2C retries Jiada Wang
2019-11-06 7:01 ` [PATCH v5 27/48] Input: atmel_mxt_ts - orientation is not present in hover Jiada Wang
2019-11-06 7:01 ` [PATCH v5 28/48] Input: atmel_mxt_ts - implement debug output for messages Jiada Wang
2019-11-06 7:01 ` [PATCH v5 29/48] Input: atmel_mxt_ts - implement improved debug message interface Jiada Wang
2019-11-06 7:01 ` [PATCH v5 30/48] Input: atmel_mxt_ts - eliminate data->raw_info_block Jiada Wang
2019-11-06 7:01 ` [PATCH v5 31/48] Input: atmel_mxt_ts - Change call-points of mxt_free_* functions Jiada Wang
2019-11-06 7:01 ` [PATCH v5 32/48] Input: atmel_mxt_ts - rely on calculated_crc rather than file config_crc Jiada Wang
2019-11-06 7:01 ` [PATCH v5 33/48] input: atmel_mxt_ts: export GPIO reset line via sysfs Jiada Wang
2019-11-06 7:01 ` [PATCH v5 34/48] input: atmel_mxt_ts: Add Missing Delay for reset handling of Atmel touch panel controller in detachable displays Jiada Wang
2019-11-06 7:01 ` [PATCH v5 35/48] Input: atmel_mxt_ts: Add support for run self-test routine Jiada Wang
2019-11-06 7:01 ` [PATCH v5 36/48] Input: atmel_mxt_ts: Limit the max bytes transferred in an i2c transaction Jiada Wang
2019-11-06 7:01 ` [PATCH v5 37/48] Input: atmel_mxt_ts: return error from mxt_process_messages_until_invalid() Jiada Wang
2019-11-06 7:01 ` [PATCH v5 38/48] Input: Atmel: improve error handling in mxt_start() Jiada Wang
2019-11-06 7:01 ` [PATCH v5 39/48] Input: Atmel: improve error handling in mxt_initialize() Jiada Wang
2019-11-06 7:01 ` [PATCH v5 40/48] Input: Atmel: improve error handling in mxt_update_cfg() Jiada Wang
2019-11-06 7:01 ` [PATCH v5 41/48] Input: Atmel: Improve error handling in mxt_initialize_input_device() Jiada Wang
2019-11-06 7:01 ` [PATCH v5 42/48] Input: Atmel: handle ReportID "0x00" while processing T5 messages Jiada Wang
2019-11-06 7:01 ` [PATCH v5 43/48] Input: Atmel: use T44 object to process " Jiada Wang
2019-11-06 7:01 ` [PATCH v5 44/48] Input: atmel_mxt_ts: use gpiod_set_value_cansleep for reset pin Jiada Wang
2019-11-06 7:01 ` Jiada Wang [this message]
2019-11-06 7:01 ` [PATCH v5 46/48] input: atmel_mxt_ts: added sysfs interface to update atmel T38 data Jiada Wang
2019-11-06 7:01 ` [PATCH v5 47/48] Input: atmel_mxt_ts: Implement synchronization during various operation Jiada Wang
2019-11-06 7:01 ` [PATCH v5 48/48] Input: atmel_mxt_ts - Fix compilation warning Jiada Wang
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