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authorBrian Norris <briannorris@chromium.org>2022-11-02 01:22:09 +0300
committerTzung-Bi Shih <tzungbi@kernel.org>2022-11-02 07:28:47 +0300
commit873ab3e886b52ba3d6ade3c5f3e6a0cff0c8cb12 (patch)
treecb0041381d44c82f5b218aa9325109d7fe792f84 /drivers/platform/chrome
parent692a68ad7f3c568359b9f18d966628856fd34ff3 (diff)
downloadlinux-873ab3e886b52ba3d6ade3c5f3e6a0cff0c8cb12.tar.xz
platform/chrome: cros_ec_lightbar: Set PROBE_PREFER_ASYNCHRONOUS
This driver takes on the order of 15ms to start on some systems. Even on systems where there is no lightbar support, it can take a few milliseconds just to probe the EC for support. It shouldn't have many cross-device dependencies to race with, nor racy access to shared state with other drivers, so this should be a relatively low risk change. This driver was pinpointed as part of a survey of top slowest initcalls (i.e., are built in, and probing synchronously) on a lab of ChromeOS systems. Signed-off-by: Brian Norris <briannorris@chromium.org> Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org> Link: https://lore.kernel.org/r/20221101152132.v2.4.I565598102e0bfb03bdf8c090d3bfdf954d026bc5@changeid
Diffstat (limited to 'drivers/platform/chrome')
-rw-r--r--drivers/platform/chrome/cros_ec_lightbar.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/platform/chrome/cros_ec_lightbar.c b/drivers/platform/chrome/cros_ec_lightbar.c
index 58beb2a047b2..1674105decfb 100644
--- a/drivers/platform/chrome/cros_ec_lightbar.c
+++ b/drivers/platform/chrome/cros_ec_lightbar.c
@@ -602,6 +602,7 @@ static struct platform_driver cros_ec_lightbar_driver = {
.driver = {
.name = DRV_NAME,
.pm = &cros_ec_lightbar_pm_ops,
+ .probe_type = PROBE_PREFER_ASYNCHRONOUS,
},
.probe = cros_ec_lightbar_probe,
.remove = cros_ec_lightbar_remove,