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Subject[PATCH 2/2] extcon: axp288: Only reschedule charger-detection at boot when a SDP is detected
Date
The only misdetection which can happen at boot due to data-lines mux issues
is detecting a non SDP as SDP, so we only need to retry if we detect a SDP
on our first detection.

Note Vbus misdetection is not a problem, as soon as the drivers controlling
the Vbus path set it correctly we will get an interrupt which reschedules
the charger-detection.

Also update the comment about the re-detection to reflect this.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
drivers/extcon/extcon-axp288.c | 14 +++++++-------
1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/extcon/extcon-axp288.c b/drivers/extcon/extcon-axp288.c
index 63b99d5becd7..17e6808af0d1 100644
--- a/drivers/extcon/extcon-axp288.c
+++ b/drivers/extcon/extcon-axp288.c
@@ -161,16 +161,16 @@ static void axp288_chrg_detect_complete(struct axp288_extcon_info *info,
/*
* We depend on other drivers to do things like mux the data lines,
* enable/disable vbus based on the id-pin, etc. Sometimes the BIOS has
- * not set these things up correctly resulting in the initial charger
- * cable type detection giving a wrong result and we end up not charging
- * or charging at only 0.5A.
+ * not set these things up correctly resulting in a wrong result for the
+ * initial charger type detection and we end up charging at only 0.5A.
*
- * So we schedule a second cable type detection after 2 seconds to
- * give the other drivers time to load and do their thing.
+ * If our first detect detects an SDP charger-type, we try again after
+ * 2 seconds to give the other drivers time to load and do their thing.
*/
if (!info->first_detect_done) {
- queue_delayed_work(system_wq, &info->det_work,
- msecs_to_jiffies(2000));
+ if (info->previous_cable == EXTCON_CHG_USB_SDP)
+ queue_delayed_work(system_wq, &info->det_work,
+ msecs_to_jiffies(2000));
info->first_detect_done = true;
}

--
2.14.3
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