[v3,1/3] serdev: Add method to assert break signal over tty UART port

Commit Message

Neeraj Sanjay Kale Feb. 13, 2023, 2:54 p.m. UTC

Adds serdev_device_break_ctl() and an implementation for ttyport.
This function simply calls the break_ctl in tty layer, which can
assert a break signal over UART-TX line, if the tty and the
underlying platform and UART peripheral supports this operation.

Signed-off-by: Neeraj Sanjay Kale <[e-mail]>
---
v3: Add details to the commit message (Greg KH)
---
 drivers/tty/serdev/core.c           | 11 +++++++++++
 drivers/tty/serdev/serdev-ttyport.c | 12 ++++++++++++
 include/linux/serdev.h              |  6 ++++++
 3 files changed, 29 insertions(+)

Comments

[e-mail] Feb. 13, 2023, 3:40 p.m. UTC | #1

This is automated email and please do not reply to this email!

Dear submitter,

Thank you for submitting the patches to the linux bluetooth mailing list.
This is a CI test results with your patch series:
PW Link:https://patchwork.kernel.org/project/bluetooth/list/?series=721320

---Test result---

Test Summary:
CheckPatch                    FAIL      5.33 seconds
GitLint                       FAIL      1.14 seconds
SubjectPrefix                 FAIL      0.61 seconds
BuildKernel                   PASS      41.88 seconds
CheckAllWarning               PASS      46.09 seconds
CheckSparse                   PASS      51.78 seconds
CheckSmatch                   PASS      137.50 seconds
BuildKernel32                 PASS      41.24 seconds
TestRunnerSetup               PASS      595.73 seconds
TestRunner_l2cap-tester       PASS      19.94 seconds
TestRunner_iso-tester         PASS      22.36 seconds
TestRunner_bnep-tester        PASS      7.57 seconds
TestRunner_mgmt-tester        PASS      146.06 seconds
TestRunner_rfcomm-tester      PASS      11.53 seconds
TestRunner_sco-tester         PASS      10.51 seconds
TestRunner_ioctl-tester       PASS      13.45 seconds
TestRunner_mesh-tester        PASS      9.63 seconds
TestRunner_smp-tester         PASS      10.75 seconds
TestRunner_userchan-tester    PASS      7.85 seconds
IncrementalBuild              PASS      49.44 seconds

Details
##############################
Test: CheckPatch - FAIL
Desc: Run checkpatch.pl script
Output:
[v3,3/3] Bluetooth: NXP: Add protocol support for NXP Bluetooth chipsets
WARNING: added, moved or deleted file(s), does MAINTAINERS need updating?
#199: 
new file mode 100644

total: 0 errors, 1 warnings, 1392 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

/github/workspace/src/src/13138551.patch has style problems, please review.

NOTE: Ignored message types: UNKNOWN_COMMIT_ID

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.


##############################
Test: GitLint - FAIL
Desc: Run gitlint
Output:
[v3,2/3] dt-bindings: net: bluetooth: Add NXP bluetooth support

WARNING: I3 - ignore-body-lines: gitlint will be switching from using Python regex 'match' (match beginning) to 'search' (match anywhere) semantics. Please review your ignore-body-lines.regex option accordingly. To remove this warning, set general.regex-style-search=True. More details: https://jorisroovers.github.io/gitlint/configuration/#regex-style-search
9: B1 Line exceeds max length (109>80): "v2: Modified description, added specific compatibility devices, corrected indentations. (Krzysztof Kozlowski)"
15: B1 Line exceeds max length (85>80): " create mode 100644 Documentation/devicetree/bindings/net/bluetooth/nxp,w8xxx-bt.yaml"
##############################
Test: SubjectPrefix - FAIL
Desc: Check subject contains "Bluetooth" prefix
Output:
"Bluetooth: " prefix is not specified in the subject
"Bluetooth: " prefix is not specified in the subject


---
Regards,
Linux Bluetooth

Patch

diff --git a/drivers/tty/serdev/core.c b/drivers/tty/serdev/core.c
index 0180e1e4e75d..f2fdd6264e5d 100644
--- a/drivers/tty/serdev/core.c
+++ b/drivers/tty/serdev/core.c
@@ -405,6 +405,17 @@  int serdev_device_set_tiocm(struct serdev_device *serdev, int set, int clear)
 }
 EXPORT_SYMBOL_GPL(serdev_device_set_tiocm);
 
+int serdev_device_break_ctl(struct serdev_device *serdev, int break_state)
+{
+	struct serdev_controller *ctrl = serdev->ctrl;
+
+	if (!ctrl || !ctrl->ops->break_ctl)
+		return -EOPNOTSUPP;
+
+	return ctrl->ops->break_ctl(ctrl, break_state);
+}
+EXPORT_SYMBOL_GPL(serdev_device_break_ctl);
+
 static int serdev_drv_probe(struct device *dev)
 {
 	const struct serdev_device_driver *sdrv = to_serdev_device_driver(dev->driver);
diff --git a/drivers/tty/serdev/serdev-ttyport.c b/drivers/tty/serdev/serdev-ttyport.c
index d367803e2044..9888673744af 100644
--- a/drivers/tty/serdev/serdev-ttyport.c
+++ b/drivers/tty/serdev/serdev-ttyport.c
@@ -247,6 +247,17 @@  static int ttyport_set_tiocm(struct serdev_controller *ctrl, unsigned int set, u
 	return tty->ops->tiocmset(tty, set, clear);
 }
 
+static int ttyport_break_ctl(struct serdev_controller *ctrl, unsigned int break_state)
+{
+	struct serport *serport = serdev_controller_get_drvdata(ctrl);
+	struct tty_struct *tty = serport->tty;
+
+	if (!tty->ops->break_ctl)
+		return -EOPNOTSUPP;
+
+	return tty->ops->break_ctl(tty, break_state);
+}
+
 static const struct serdev_controller_ops ctrl_ops = {
 	.write_buf = ttyport_write_buf,
 	.write_flush = ttyport_write_flush,
@@ -259,6 +270,7 @@  static const struct serdev_controller_ops ctrl_ops = {
 	.wait_until_sent = ttyport_wait_until_sent,
 	.get_tiocm = ttyport_get_tiocm,
 	.set_tiocm = ttyport_set_tiocm,
+	.break_ctl = ttyport_break_ctl,
 };
 
 struct device *serdev_tty_port_register(struct tty_port *port,
diff --git a/include/linux/serdev.h b/include/linux/serdev.h
index 66f624fc618c..c065ef1c82f1 100644
--- a/include/linux/serdev.h
+++ b/include/linux/serdev.h
@@ -92,6 +92,7 @@  struct serdev_controller_ops {
 	void (*wait_until_sent)(struct serdev_controller *, long);
 	int (*get_tiocm)(struct serdev_controller *);
 	int (*set_tiocm)(struct serdev_controller *, unsigned int, unsigned int);
+	int (*break_ctl)(struct serdev_controller *ctrl, unsigned int break_state);
 };
 
 /**
@@ -202,6 +203,7 @@  int serdev_device_write_buf(struct serdev_device *, const unsigned char *, size_
 void serdev_device_wait_until_sent(struct serdev_device *, long);
 int serdev_device_get_tiocm(struct serdev_device *);
 int serdev_device_set_tiocm(struct serdev_device *, int, int);
+int serdev_device_break_ctl(struct serdev_device *serdev, int break_state);
 void serdev_device_write_wakeup(struct serdev_device *);
 int serdev_device_write(struct serdev_device *, const unsigned char *, size_t, long);
 void serdev_device_write_flush(struct serdev_device *);
@@ -255,6 +257,10 @@  static inline int serdev_device_set_tiocm(struct serdev_device *serdev, int set,
 {
 	return -ENOTSUPP;
 }
+static inline int serdev_device_break_ctl(struct serdev_device *serdev, int break_state)
+{
+	return -EOPNOTSUPP;
+}
 static inline int serdev_device_write(struct serdev_device *sdev, const unsigned char *buf,
 				      size_t count, unsigned long timeout)
 {