tools/thermal: tmon: add --target-temp parameter

If we launch in daemon mode (--daemon), we don't have the ncurses UI,
but we might want to set the target temperature still. For example,
someone might stick the following in their boot script:

  tmon --control intel_powerclamp --target-temp 90 --log --daemon

This would turn on CPU idle injection when we're around 90 degrees
celsius, and would log temperature and throttling info to
/var/tmp/tmon.log.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Acked-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>

2 files changed, 14 insertions, 2 deletions

diff --git a/tools/thermal/tmon/tmon.8 b/tools/thermal/tmon/tmon.8
index 0be727cb9892..02d5179803aa 100644
--- a/tools/thermal/tmon/tmon.8
+++ b/tools/thermal/tmon/tmon.8
@@ -55,6 +55,8 @@ The \fB-l --log\fP option write data to /var/tmp/tmon.log
 .PP
 The \fB-t --time-interval\fP option sets the polling interval in seconds
 .PP
+The \fB-T --target-temp\fP option sets the initial target temperature
+.PP
 The \fB-v --version\fP option shows the version of \fBtmon \fP
 .PP
 The \fB-z --zone\fP option sets the target therma zone instance to be controlled
diff --git a/tools/thermal/tmon/tmon.c b/tools/thermal/tmon/tmon.c
index 09b7c3218334..9aa19652e8e8 100644
--- a/tools/thermal/tmon/tmon.c
+++ b/tools/thermal/tmon/tmon.c
@@ -64,6 +64,7 @@ void usage()
         printf("  -h, --help            show this help message\n");
         printf("  -l, --log             log data to /var/tmp/tmon.log\n");
         printf("  -t, --time-interval   sampling time interval, > 1 sec.\n");
+        printf("  -T, --target-temp     initial target temperature\n");
         printf("  -v, --version         show version\n");
         printf("  -z, --zone            target thermal zone id\n");
 
@@ -219,6 +220,7 @@ static struct option opts[] = {
         { "control", 1, NULL, 'c' },
         { "daemon", 0, NULL, 'd' },
         { "time-interval", 1, NULL, 't' },
+        { "target-temp", 1, NULL, 'T' },
         { "log", 0, NULL, 'l' },
         { "help", 0, NULL, 'h' },
         { "version", 0, NULL, 'v' },
@@ -231,7 +233,7 @@ int main(int argc, char **argv)
 {
         int err = 0;
         int id2 = 0, c;
-        double yk = 0.0; /* controller output */
+        double yk = 0.0, temp; /* controller output */
         int target_tz_index;
 
         if (geteuid() != 0) {
@@ -239,7 +241,7 @@ int main(int argc, char **argv)
                 exit(EXIT_FAILURE);
         }
 
-        while ((c = getopt_long(argc, argv, "c:dlht:vgz:", opts, &id2)) != -1) {
+        while ((c = getopt_long(argc, argv, "c:dlht:T:vgz:", opts, &id2)) != -1) {
                 switch (c) {
                 case 'c':
                         no_control = 0;
@@ -254,6 +256,14 @@ int main(int argc, char **argv)
                         if (ticktime < 1)
                                 ticktime = 1;
                         break;
+                case 'T':
+                        temp = strtod(optarg, NULL);
+                        if (temp < 0) {
+                                fprintf(stderr, "error: temperature must be positive\n");
+                                return 1;
+                        }
+                        target_temp_user = temp;
+                        break;
                 case 'l':
                         printf("Logging data to /var/tmp/tmon.log\n");
                         logging = 1;