platform/chrome: cros_ec_debugfs: Make log polling period a parameter

Make EC log polling period a module parameter. This allows the polling
period to be set via the kernel command line. Keeping the default at
the current 10 second period. The optimal polling period will differ by
board.

Signed-off-by: Rob Barnes <robbarnes@google.com>
Link: https://lore.kernel.org/r/20240507155809.525701-1-robbarnes@google.com
Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org>

diff --git a/drivers/platform/chrome/cros_ec_debugfs.c b/drivers/platform/chrome/cros_ec_debugfs.c
index e1d313246beb5a0dd9b709c70c4814606c59e18d..f0e9efb543df6ce2a3137992b82ea63a76877bfa 100644 (file)
--- a/drivers/platform/chrome/cros_ec_debugfs.c
+++ b/drivers/platform/chrome/cros_ec_debugfs.c
@@ -26,6 +26,10 @@
 
 #define CIRC_ADD(idx, size, value)     (((idx) + (value)) & ((size) - 1))
 
+static unsigned int log_poll_period_ms = LOG_POLL_SEC * MSEC_PER_SEC;
+module_param(log_poll_period_ms, uint, 0644);
+MODULE_PARM_DESC(log_poll_period_ms, "EC log polling period(ms)");
+
 /* waitqueue for log readers */
 static DECLARE_WAIT_QUEUE_HEAD(cros_ec_debugfs_log_wq);
 
@@ -57,7 +61,7 @@ struct cros_ec_debugfs {
 
 /*
  * We need to make sure that the EC log buffer on the UART is large enough,
- * so that it is unlikely enough to overlow within LOG_POLL_SEC.
+ * so that it is unlikely enough to overlow within log_poll_period_ms.
  */
 static void cros_ec_console_log_work(struct work_struct *__work)
 {
@@ -119,7 +123,7 @@ static void cros_ec_console_log_work(struct work_struct *__work)
 
 resched:
        schedule_delayed_work(&debug_info->log_poll_work,
-                             msecs_to_jiffies(LOG_POLL_SEC * 1000));
+                             msecs_to_jiffies(log_poll_period_ms));
 }
 
 static int cros_ec_console_log_open(struct inode *inode, struct file *file)