Last commit made on 2018-06-12
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f840d7f... by Greg Kroah-Hartman <email address hidden> on 2018-04-26

Revert "pinctrl: intel: Initialize GPIO properly when used through irqchip"

BugLink: http://bugs.launchpad.net/bugs/1775483

This reverts commit f5a26acf0162477af6ee4c11b4fb9cffe5d3e257

Mike writes:
 It seems that commit f5a26acf0162 ("pinctrl: intel: Initialize GPIO
 properly when used through irqchip") can cause problems on some Skylake
 systems with Sunrisepoint PCH-H. Namely on certain systems it may turn
 the backlight PWM pin from native mode to GPIO which makes the screen
 blank during boot.

 There is more information here:


 The actual reason is that GPIO numbering used in BIOS is using "Windows"
 numbers meaning that they don't match the hardware 1:1 and because of
 this a wrong pin (backlight PWM) is picked and switched to GPIO mode.

 There is a proper fix for this but since it has quite many dependencies
 on commits that cannot be considered stable material, I suggest we
 revert commit f5a26acf0162 from stable trees 4.9, 4.14 and 4.15 to
 prevent the backlight issue.

Reported-by: Mika Westerberg <email address hidden>
Fixes: f5a26acf0162 ("pinctrl: intel: Initialize GPIO properly when used through irqchip")
Cc: Daniel Drake <email address hidden>
Cc: Chris Chiu <email address hidden>
Cc: Linus Walleij <email address hidden>
Signed-off-by: Greg Kroah-Hartman <email address hidden>
Signed-off-by: Kamal Mostafa <email address hidden>
Signed-off-by: Khalid Elmously <email address hidden>

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