| Message ID | 20230220152038.3877596-3-fe@dev.tdt.de |
|---|---|
| State | Superseded |
| Headers | show |
| Series | leds: ledtrig-tty: add tty_led_mode xtension | expand |
Hi Florian,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on tty/tty-testing]
[also build test WARNING on tty/tty-next tty/tty-linus pavel-leds/for-next staging/staging-testing staging/staging-next staging/staging-linus linus/master v6.2 next-20230220]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Florian-Eckert/tty-new-helper-function-tty_get_mget/20230220-232129
base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git tty-testing
patch link: https://lore.kernel.org/r/20230220152038.3877596-3-fe%40dev.tdt.de
patch subject: [PATCH v4 2/2] trigger: ledtrig-tty: add additional modes
config: ia64-allyesconfig (https://download.01.org/0day-ci/archive/20230221/202302210235.GfyfYlvF-lkp@intel.com/config)
compiler: ia64-linux-gcc (GCC) 12.1.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://github.com/intel-lab-lkp/linux/commit/8da3a8a2edcad2e4b36fce551cac1961a5cd90a6
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Florian-Eckert/tty-new-helper-function-tty_get_mget/20230220-232129
git checkout 8da3a8a2edcad2e4b36fce551cac1961a5cd90a6
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=ia64 olddefconfig
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=ia64 SHELL=/bin/bash drivers/leds/
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202302210235.GfyfYlvF-lkp@intel.com/
All warnings (new ones prefixed by >>):
drivers/leds/trigger/ledtrig-tty.c:15:24: error: 'TTY_LED_RNG' undeclared here (not in a function); did you mean 'TTY_LED_CNT'?
15 | TTY_LED_LAST = TTY_LED_RNG
| ^~~~~~~~~~~
| TTY_LED_CNT
drivers/leds/trigger/ledtrig-tty.c:33:10: error: array index in initializer not of integer type
33 | [TTY_LED_RNG] = "RNG", // RNG Ring Indicator (RI)
| ^~~~~~~~~~~
drivers/leds/trigger/ledtrig-tty.c:33:10: note: (near initialization for 'mode')
drivers/leds/trigger/ledtrig-tty.c: In function 'ledtrig_tty_mode_show':
drivers/leds/trigger/ledtrig-tty.c:48:34: error: '__TTY_LED_LAST' undeclared (first use in this function); did you mean 'TTY_LED_LAST'?
48 | bool last = i == __TTY_LED_LAST;
| ^~~~~~~~~~~~~~
| TTY_LED_LAST
drivers/leds/trigger/ledtrig-tty.c:48:34: note: each undeclared identifier is reported only once for each function it appears in
>> drivers/leds/trigger/ledtrig-tty.c:50:48: warning: too many arguments for format [-Wformat-extra-args]
50 | len += sysfs_emit_at(buf, len, "%s%s%s",
| ^~~~~~~~
drivers/leds/trigger/ledtrig-tty.c: In function 'tty_led_mode_store':
drivers/leds/trigger/ledtrig-tty.c:81:38: error: '__TTY_LED_MAX' undeclared (first use in this function); did you mean 'TTY_LED_CAR'?
81 | enum tty_led_mode tty_mode = __TTY_LED_MAX;
| ^~~~~~~~~~~~~
| TTY_LED_CAR
drivers/leds/trigger/ledtrig-tty.c:88:26: error: '__TTY_LED_LAST' undeclared (first use in this function); did you mean 'TTY_LED_LAST'?
88 | for (i = 0; i <= __TTY_LED_LAST; i++)
| ^~~~~~~~~~~~~~
| TTY_LED_LAST
>> drivers/leds/trigger/ledtrig-tty.c:89:17: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
89 | if (strncmp(buf, mode[i], size) == 0)
| ^~
drivers/leds/trigger/ledtrig-tty.c:91:25: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
91 | break;
| ^~~~~
drivers/leds/trigger/ledtrig-tty.c:91:25: error: break statement not within loop or switch
>> drivers/leds/trigger/ledtrig-tty.c:81:27: warning: variable 'tty_mode' set but not used [-Wunused-but-set-variable]
81 | enum tty_led_mode tty_mode = __TTY_LED_MAX;
| ^~~~~~~~
drivers/leds/trigger/ledtrig-tty.c:80:17: warning: unused variable 'ret' [-Wunused-variable]
80 | ssize_t ret = size;
| ^~~
drivers/leds/trigger/ledtrig-tty.c:79:34: warning: unused variable 'trigger_data' [-Wunused-variable]
79 | struct ledtrig_tty_data *trigger_data = led_trigger_get_drvdata(dev);
| ^~~~~~~~~~~~
drivers/leds/trigger/ledtrig-tty.c:92:17: error: no return statement in function returning non-void [-Werror=return-type]
92 | }
| ^
drivers/leds/trigger/ledtrig-tty.c: At top level:
drivers/leds/trigger/ledtrig-tty.c:94:9: error: expected identifier or '(' before 'if'
94 | if (tty_mode > __TTY_LED_LAST)
| ^~
drivers/leds/trigger/ledtrig-tty.c:97:20: error: expected declaration specifiers or '...' before '&' token
97 | mutex_lock(&trigger_data->mutex);
| ^
drivers/leds/trigger/ledtrig-tty.c:98:21: error: expected '=', ',', ';', 'asm' or '__attribute__' before '->' token
98 | trigger_data->mode = tty_mode;
| ^~
drivers/leds/trigger/ledtrig-tty.c:99:22: error: expected declaration specifiers or '...' before '&' token
99 | mutex_unlock(&trigger_data->mutex);
| ^
drivers/leds/trigger/ledtrig-tty.c:101:9: error: expected identifier or '(' before 'return'
101 | return ret;
| ^~~~~~
drivers/leds/trigger/ledtrig-tty.c:102:1: error: expected identifier or '(' before '}' token
102 | }
| ^
cc1: some warnings being treated as errors
vim +50 drivers/leds/trigger/ledtrig-tty.c
40
41 static ssize_t ledtrig_tty_mode_show(char *buf, enum tty_led_mode tty_mode)
42 {
43 int len = 0;
44 int i;
45
46 for (i = 0; i <= TTY_LED_LAST; i++) {
47 bool hit = tty_mode == i;
48 bool last = i == __TTY_LED_LAST;
49
> 50 len += sysfs_emit_at(buf, len, "%s%s%s",
51 hit ? "[" : "",
52 mode[i],
53 hit ? "]" : "",
54 last ? "" : " ");
55 }
56
57 len += sysfs_emit_at(buf, len, "\n");
58
59 return len;
60 }
61
62 static ssize_t tty_led_mode_show(struct device *dev,
63 struct device_attribute *attr, char *buf)
64 {
65 struct ledtrig_tty_data *trigger_data = led_trigger_get_drvdata(dev);
66 enum tty_led_mode tty_mode;
67
68 mutex_lock(&trigger_data->mutex);
69 tty_mode = trigger_data->mode;
70 mutex_unlock(&trigger_data->mutex);
71
72 return ledtrig_tty_mode_show(buf, tty_mode);
73 }
74
75 static ssize_t tty_led_mode_store(struct device *dev,
76 struct device_attribute *attr, const char *buf,
77 size_t size)
78 {
79 struct ledtrig_tty_data *trigger_data = led_trigger_get_drvdata(dev);
80 ssize_t ret = size;
> 81 enum tty_led_mode tty_mode = __TTY_LED_MAX;
82 int i;
83
84 /* Check for new line in string*/
85 if (size > 0 && buf[size - 1] == '\n')
86 size -= 1;
87
88 for (i = 0; i <= __TTY_LED_LAST; i++)
> 89 if (strncmp(buf, mode[i], size) == 0)
90 tty_mode = i;
91 break;
92 }
93
94 if (tty_mode > __TTY_LED_LAST)
95 return -EINVAL;
96
97 mutex_lock(&trigger_data->mutex);
98 trigger_data->mode = tty_mode;
99 mutex_unlock(&trigger_data->mutex);
100
101 return ret;
102 }
103 static DEVICE_ATTR_RW(tty_led_mode);
104
Hi Florian,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on tty/tty-testing]
[also build test WARNING on tty/tty-next tty/tty-linus pavel-leds/for-next staging/staging-testing staging/staging-next staging/staging-linus linus/master v6.2]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Florian-Eckert/tty-new-helper-function-tty_get_mget/20230220-232129
base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git tty-testing
patch link: https://lore.kernel.org/r/20230220152038.3877596-3-fe%40dev.tdt.de
patch subject: [PATCH v4 2/2] trigger: ledtrig-tty: add additional modes
config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20230221/202302210614.4oTMenu2-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-8) 11.3.0
reproduce (this is a W=1 build):
# https://github.com/intel-lab-lkp/linux/commit/8da3a8a2edcad2e4b36fce551cac1961a5cd90a6
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Florian-Eckert/tty-new-helper-function-tty_get_mget/20230220-232129
git checkout 8da3a8a2edcad2e4b36fce551cac1961a5cd90a6
# save the config file
mkdir build_dir && cp config build_dir/.config
make W=1 O=build_dir ARCH=x86_64 olddefconfig
make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/leds/
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202302210614.4oTMenu2-lkp@intel.com/
All warnings (new ones prefixed by >>):
drivers/leds/trigger/ledtrig-tty.c:15:24: error: 'TTY_LED_RNG' undeclared here (not in a function); did you mean 'TTY_LED_CNT'?
15 | TTY_LED_LAST = TTY_LED_RNG
| ^~~~~~~~~~~
| TTY_LED_CNT
drivers/leds/trigger/ledtrig-tty.c:33:10: error: array index in initializer not of integer type
33 | [TTY_LED_RNG] = "RNG", // RNG Ring Indicator (RI)
| ^~~~~~~~~~~
drivers/leds/trigger/ledtrig-tty.c:33:10: note: (near initialization for 'mode')
drivers/leds/trigger/ledtrig-tty.c: In function 'ledtrig_tty_mode_show':
drivers/leds/trigger/ledtrig-tty.c:48:34: error: '__TTY_LED_LAST' undeclared (first use in this function); did you mean 'TTY_LED_LAST'?
48 | bool last = i == __TTY_LED_LAST;
| ^~~~~~~~~~~~~~
| TTY_LED_LAST
drivers/leds/trigger/ledtrig-tty.c:48:34: note: each undeclared identifier is reported only once for each function it appears in
drivers/leds/trigger/ledtrig-tty.c:50:48: warning: too many arguments for format [-Wformat-extra-args]
50 | len += sysfs_emit_at(buf, len, "%s%s%s",
| ^~~~~~~~
drivers/leds/trigger/ledtrig-tty.c: In function 'tty_led_mode_store':
drivers/leds/trigger/ledtrig-tty.c:81:38: error: '__TTY_LED_MAX' undeclared (first use in this function); did you mean 'TTY_LED_CAR'?
81 | enum tty_led_mode tty_mode = __TTY_LED_MAX;
| ^~~~~~~~~~~~~
| TTY_LED_CAR
drivers/leds/trigger/ledtrig-tty.c:88:26: error: '__TTY_LED_LAST' undeclared (first use in this function); did you mean 'TTY_LED_LAST'?
88 | for (i = 0; i <= __TTY_LED_LAST; i++)
| ^~~~~~~~~~~~~~
| TTY_LED_LAST
drivers/leds/trigger/ledtrig-tty.c:89:17: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
89 | if (strncmp(buf, mode[i], size) == 0)
| ^~
drivers/leds/trigger/ledtrig-tty.c:91:25: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
91 | break;
| ^~~~~
drivers/leds/trigger/ledtrig-tty.c:91:25: error: break statement not within loop or switch
drivers/leds/trigger/ledtrig-tty.c:81:27: warning: variable 'tty_mode' set but not used [-Wunused-but-set-variable]
81 | enum tty_led_mode tty_mode = __TTY_LED_MAX;
| ^~~~~~~~
>> drivers/leds/trigger/ledtrig-tty.c:80:17: warning: unused variable 'ret' [-Wunused-variable]
80 | ssize_t ret = size;
| ^~~
>> drivers/leds/trigger/ledtrig-tty.c:79:34: warning: unused variable 'trigger_data' [-Wunused-variable]
79 | struct ledtrig_tty_data *trigger_data = led_trigger_get_drvdata(dev);
| ^~~~~~~~~~~~
drivers/leds/trigger/ledtrig-tty.c:92:17: error: no return statement in function returning non-void [-Werror=return-type]
92 | }
| ^
drivers/leds/trigger/ledtrig-tty.c: At top level:
drivers/leds/trigger/ledtrig-tty.c:94:9: error: expected identifier or '(' before 'if'
94 | if (tty_mode > __TTY_LED_LAST)
| ^~
In file included from include/linux/rhashtable-types.h:14,
from include/linux/ipc.h:7,
from include/uapi/linux/sem.h:5,
from include/linux/sem.h:5,
from include/linux/sched.h:15,
from include/linux/delay.h:23,
from drivers/leds/trigger/ledtrig-tty.c:3:
drivers/leds/trigger/ledtrig-tty.c:97:20: error: expected declaration specifiers or '...' before '&' token
97 | mutex_lock(&trigger_data->mutex);
| ^
include/linux/mutex.h:187:44: note: in definition of macro 'mutex_lock'
187 | #define mutex_lock(lock) mutex_lock_nested(lock, 0)
| ^~~~
include/linux/mutex.h:187:50: error: expected declaration specifiers or '...' before numeric constant
187 | #define mutex_lock(lock) mutex_lock_nested(lock, 0)
| ^
drivers/leds/trigger/ledtrig-tty.c:97:9: note: in expansion of macro 'mutex_lock'
97 | mutex_lock(&trigger_data->mutex);
| ^~~~~~~~~~
drivers/leds/trigger/ledtrig-tty.c:98:21: error: expected '=', ',', ';', 'asm' or '__attribute__' before '->' token
98 | trigger_data->mode = tty_mode;
| ^~
drivers/leds/trigger/ledtrig-tty.c:99:22: error: expected declaration specifiers or '...' before '&' token
99 | mutex_unlock(&trigger_data->mutex);
| ^
drivers/leds/trigger/ledtrig-tty.c:101:9: error: expected identifier or '(' before 'return'
101 | return ret;
| ^~~~~~
drivers/leds/trigger/ledtrig-tty.c:102:1: error: expected identifier or '(' before '}' token
102 | }
| ^
cc1: some warnings being treated as errors
vim +/ret +80 drivers/leds/trigger/ledtrig-tty.c
74
75 static ssize_t tty_led_mode_store(struct device *dev,
76 struct device_attribute *attr, const char *buf,
77 size_t size)
78 {
> 79 struct ledtrig_tty_data *trigger_data = led_trigger_get_drvdata(dev);
> 80 ssize_t ret = size;
81 enum tty_led_mode tty_mode = __TTY_LED_MAX;
82 int i;
83
84 /* Check for new line in string*/
85 if (size > 0 && buf[size - 1] == '\n')
86 size -= 1;
87
88 for (i = 0; i <= __TTY_LED_LAST; i++)
89 if (strncmp(buf, mode[i], size) == 0)
90 tty_mode = i;
> 91 break;
92 }
93
94 if (tty_mode > __TTY_LED_LAST)
95 return -EINVAL;
96
97 mutex_lock(&trigger_data->mutex);
98 trigger_data->mode = tty_mode;
99 mutex_unlock(&trigger_data->mutex);
100
101 return ret;
102 }
103 static DEVICE_ATTR_RW(tty_led_mode);
104
diff --git a/Documentation/ABI/testing/sysfs-class-led-trigger-tty b/Documentation/ABI/testing/sysfs-class-led-trigger-tty index 2bf6b24e781b..31d62a5ae095 100644 --- a/Documentation/ABI/testing/sysfs-class-led-trigger-tty +++ b/Documentation/ABI/testing/sysfs-class-led-trigger-tty @@ -4,3 +4,19 @@ KernelVersion: 5.10 Contact: linux-leds@vger.kernel.org Description: Specifies the tty device name of the triggering tty + +What: /sys/class/leds/<led>/mode +Date: January 2023 +KernelVersion: 6.3 +Description: + Specifies the operating to trigger the LED. + The following operating modes are supported: + Tx/Rx: Flash LED on data transmission (default) + CTS: DCE Ready to accept data from the DTE. + LED on if line is high. + DSR: DCE is ready to receive and send data. + LED on if line is high. + CAR: DCE is receiving a carrier from a remote DTE. + LED on if line is high. + RNG: DCE has detected an incoming ring signal. + LED on if line is high. diff --git a/drivers/leds/trigger/ledtrig-tty.c b/drivers/leds/trigger/ledtrig-tty.c index f62db7e520b5..8b2eed7e67e5 100644 --- a/drivers/leds/trigger/ledtrig-tty.c +++ b/drivers/leds/trigger/ledtrig-tty.c @@ -7,6 +7,14 @@ #include <linux/tty.h> #include <uapi/linux/serial.h> +enum tty_led_mode { + TTY_LED_CNT, + TTY_LED_CTS, + TTY_LED_DSR, + TTY_LED_CAR, + TTY_LED_LAST = TTY_LED_RNG +}; + struct ledtrig_tty_data { struct led_classdev *led_cdev; struct delayed_work dwork; @@ -14,6 +22,15 @@ struct ledtrig_tty_data { const char *ttyname; struct tty_struct *tty; int rx, tx; + enum tty_led_mode mode; +}; + +static const char * const mode[] = { + [TTY_LED_CNT] = "Tx/Rx", // Trasmit Data / Receive Data + [TTY_LED_CTS] = "CTS", // CTS Clear To Send + [TTY_LED_DSR] = "DSR", // DSR Data Set Ready + [TTY_LED_CAR] = "CAR", // CAR Data Carrier Detect (DCD) + [TTY_LED_RNG] = "RNG", // RNG Ring Indicator (RI) }; static void ledtrig_tty_restart(struct ledtrig_tty_data *trigger_data) @@ -21,6 +38,70 @@ static void ledtrig_tty_restart(struct ledtrig_tty_data *trigger_data) schedule_delayed_work(&trigger_data->dwork, 0); } +static ssize_t ledtrig_tty_mode_show(char *buf, enum tty_led_mode tty_mode) +{ + int len = 0; + int i; + + for (i = 0; i <= TTY_LED_LAST; i++) { + bool hit = tty_mode == i; + bool last = i == __TTY_LED_LAST; + + len += sysfs_emit_at(buf, len, "%s%s%s", + hit ? "[" : "", + mode[i], + hit ? "]" : "", + last ? "" : " "); + } + + len += sysfs_emit_at(buf, len, "\n"); + + return len; +} + +static ssize_t tty_led_mode_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct ledtrig_tty_data *trigger_data = led_trigger_get_drvdata(dev); + enum tty_led_mode tty_mode; + + mutex_lock(&trigger_data->mutex); + tty_mode = trigger_data->mode; + mutex_unlock(&trigger_data->mutex); + + return ledtrig_tty_mode_show(buf, tty_mode); +} + +static ssize_t tty_led_mode_store(struct device *dev, + struct device_attribute *attr, const char *buf, + size_t size) +{ + struct ledtrig_tty_data *trigger_data = led_trigger_get_drvdata(dev); + ssize_t ret = size; + enum tty_led_mode tty_mode = __TTY_LED_MAX; + int i; + + /* Check for new line in string*/ + if (size > 0 && buf[size - 1] == '\n') + size -= 1; + + for (i = 0; i <= __TTY_LED_LAST; i++) + if (strncmp(buf, mode[i], size) == 0) + tty_mode = i; + break; + } + + if (tty_mode > __TTY_LED_LAST) + return -EINVAL; + + mutex_lock(&trigger_data->mutex); + trigger_data->mode = tty_mode; + mutex_unlock(&trigger_data->mutex); + + return ret; +} +static DEVICE_ATTR_RW(tty_led_mode); + static ssize_t ttyname_show(struct device *dev, struct device_attribute *attr, char *buf) { @@ -76,6 +157,18 @@ static ssize_t ttyname_store(struct device *dev, } static DEVICE_ATTR_RW(ttyname); +static void ledtrig_tty_flags(struct ledtrig_tty_data *trigger_data, + unsigned int flag) +{ + unsigned int status; + + status = tty_get_mget(trigger_data->tty); + if (status & flag) + led_set_brightness_sync(trigger_data->led_cdev, LED_ON); + else + led_set_brightness_sync(trigger_data->led_cdev, LED_OFF); +} + static void ledtrig_tty_work(struct work_struct *work) { struct ledtrig_tty_data *trigger_data = @@ -113,21 +206,38 @@ static void ledtrig_tty_work(struct work_struct *work) trigger_data->tty = tty; } - ret = tty_get_icount(trigger_data->tty, &icount); - if (ret) { - dev_info(trigger_data->tty->dev, "Failed to get icount, stopped polling\n"); - mutex_unlock(&trigger_data->mutex); - return; - } - - if (icount.rx != trigger_data->rx || - icount.tx != trigger_data->tx) { - led_set_brightness_sync(trigger_data->led_cdev, LED_ON); - - trigger_data->rx = icount.rx; - trigger_data->tx = icount.tx; - } else { - led_set_brightness_sync(trigger_data->led_cdev, LED_OFF); + switch (trigger_data->mode) { + case TTY_LED_CTS: + ledtrig_tty_flags(trigger_data, TIOCM_CTS); + break; + case TTY_LED_DSR: + ledtrig_tty_flags(trigger_data, TIOCM_DSR); + break; + case TTY_LED_CAR: + ledtrig_tty_flags(trigger_data, TIOCM_CAR); + break; + case TTY_LED_RNG: + ledtrig_tty_flags(trigger_data, TIOCM_RNG); + break; + case TTY_LED_CNT: + default: + ret = tty_get_icount(trigger_data->tty, &icount); + if (ret) { + dev_info(trigger_data->tty->dev, "Failed to get icount, stopped polling\n"); + mutex_unlock(&trigger_data->mutex); + return; + } + + if (icount.rx != trigger_data->rx || + icount.tx != trigger_data->tx) { + led_set_brightness_sync(trigger_data->led_cdev, LED_ON); + + trigger_data->rx = icount.rx; + trigger_data->tx = icount.tx; + } else { + led_set_brightness_sync(trigger_data->led_cdev, LED_OFF); + } + break; } out: @@ -137,6 +247,7 @@ static void ledtrig_tty_work(struct work_struct *work) static struct attribute *ledtrig_tty_attrs[] = { &dev_attr_ttyname.attr, + &dev_attr_tty_led_mode.attr, NULL }; ATTRIBUTE_GROUPS(ledtrig_tty); @@ -149,6 +260,9 @@ static int ledtrig_tty_activate(struct led_classdev *led_cdev) if (!trigger_data) return -ENOMEM; + /* set default mode */ + trigger_data->mode = TTY_LED_CNT; + led_set_trigger_data(led_cdev, trigger_data); INIT_DELAYED_WORK(&trigger_data->dwork, ledtrig_tty_work);
Add additional modes to trigger the selected LED. The following modes are supported: Tx/Rx: Flash LED on data transmission (default) CTS: DCE Ready to accept data from the DTE. DSR: DCE is ready to receive and send data. CAR: DCE is receiving a carrier from a remote DTE. RNG: DCE has detected an incoming ring signal. The mode can be changed for example with the following command: echo "CTS" > /sys/class/leds/<led>/mode This would turn on the LED, when the DTE(modem) signals the DCE that it is ready to accept data. Signed-off-by: Florian Eckert <fe@dev.tdt.de> --- .../ABI/testing/sysfs-class-led-trigger-tty | 16 ++ drivers/leds/trigger/ledtrig-tty.c | 144 ++++++++++++++++-- 2 files changed, 145 insertions(+), 15 deletions(-)