tree a3db62d00170ffa816290bd9704322ccfea79086
parent 3137301b6d970219706d887eb6bdcabbf54f1f3b
author Yauhen Kharuzhy <jekhor@gmail.com> 1551644173 +0300
committer Chanwoo Choi <cw00.choi@samsung.com> 1554427301 +0900

extcon: intel-cht-wc: Enable external charger

In some configuration external charger "#charge enable" signal is
connected to PMIC. Enable it at device probing to allow charging.

Save CHGRCTRL0 and CHGDISCTR registers at driver probing and restore
them at driver unbind to re-enable hardware charging control if it was
enabled before.

Tested at Lenovo Yoga Book (YB1-X91L).

Signed-off-by: Yauhen Kharuzhy <jekhor@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Tested-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>