The series was born from the analysis and mitigation of a crc problem
raised by an M06 type device. The added sysfs attributes were helpful
in debugging the problem. Patches that change the report rate on driver
probing, mitigated crc errors on kernel bootup. The patch to get/set
report rate by sysfs for an M12 device, has been tested.
Changes in v2:
- Add Oliver Graute's 'Acked-by' tag to:
* Input: edt-ft5x06 - show model name by sysfs
* Input: edt-ft5x06 - show firmware version by sysfs
- Fix yaml file. Tested with `make DT_CHECKER_FLAGS=-m dt_binding_check'.
Dario Binacchi (6):
dt-bindings: input: touchscreen: edt-ft5x06: add report-rate
Input: edt-ft5x06 - get/set M12 report rate by sysfs
Input: edt-ft5x06 - set report rate by dts property
Input: edt-ft5x06 - show model name by sysfs
Input: edt-ft5x06 - show firmware version by sysfs
Input: edt-ft5x06 - show crc and header errors by sysfs
.../input/touchscreen/edt-ft5x06.yaml | 8 ++
drivers/input/touchscreen/edt-ft5x06.c | 81 +++++++++++++++++--
2 files changed, 81 insertions(+), 8 deletions(-)
--
2.32.0
M06 sends packets with header and crc for data verification. Now you can
check at runtime how many packets have been dropped.
Co-developed-by: Michael Trimarchi <[email protected]>
Signed-off-by: Michael Trimarchi <[email protected]>
Signed-off-by: Dario Binacchi <[email protected]>
---
Changes in v2:
- Add Oliver Graute's 'Acked-by' tag to:
* Input: edt-ft5x06 - show model name by sysfs
* Input: edt-ft5x06 - show firmware version by sysfs
- Fix yaml file. Tested with `make DT_CHECKER_FLAGS=-m dt_binding_check'.
drivers/input/touchscreen/edt-ft5x06.c | 30 ++++++++++++++++++++++++++
1 file changed, 30 insertions(+)
diff --git a/drivers/input/touchscreen/edt-ft5x06.c b/drivers/input/touchscreen/edt-ft5x06.c
index 2c946c155108..376aa4405104 100644
--- a/drivers/input/touchscreen/edt-ft5x06.c
+++ b/drivers/input/touchscreen/edt-ft5x06.c
@@ -133,6 +133,8 @@ struct edt_ft5x06_ts_data {
struct edt_reg_addr reg_addr;
enum edt_ver version;
+ unsigned int crc_errors;
+ unsigned int header_errors;
};
struct edt_i2c_chip_data {
@@ -181,6 +183,7 @@ static bool edt_ft5x06_ts_check_crc(struct edt_ft5x06_ts_data *tsdata,
crc ^= buf[i];
if (crc != buf[buflen-1]) {
+ tsdata->crc_errors++;
dev_err_ratelimited(&tsdata->client->dev,
"crc error: 0x%02x expected, got 0x%02x\n",
crc, buf[buflen-1]);
@@ -238,6 +241,7 @@ static irqreturn_t edt_ft5x06_ts_isr(int irq, void *dev_id)
if (tsdata->version == EDT_M06) {
if (rdbuf[0] != 0xaa || rdbuf[1] != 0xaa ||
rdbuf[2] != datalen) {
+ tsdata->header_errors++;
dev_err_ratelimited(dev,
"Unexpected header: %02x%02x%02x!\n",
rdbuf[0], rdbuf[1], rdbuf[2]);
@@ -552,6 +556,30 @@ static ssize_t fw_version_show(struct device *dev,
static DEVICE_ATTR_RO(fw_version);
+/* m06 only */
+static ssize_t header_errors_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
+
+ return scnprintf(buf, PAGE_SIZE, "%d\n", tsdata->header_errors);
+}
+
+static DEVICE_ATTR_RO(header_errors);
+
+/* m06 only */
+static ssize_t crc_errors_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
+
+ return scnprintf(buf, PAGE_SIZE, "%d\n", tsdata->crc_errors);
+}
+
+static DEVICE_ATTR_RO(crc_errors);
+
static struct attribute *edt_ft5x06_attrs[] = {
&edt_ft5x06_attr_gain.dattr.attr,
&edt_ft5x06_attr_offset.dattr.attr,
@@ -561,6 +589,8 @@ static struct attribute *edt_ft5x06_attrs[] = {
&edt_ft5x06_attr_report_rate.dattr.attr,
&dev_attr_model.attr,
&dev_attr_fw_version.attr,
+ &dev_attr_header_errors.attr,
+ &dev_attr_crc_errors.attr,
NULL
};
--
2.32.0