4.9-stable review patch. If anyone has any objections, please let me know.
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From: Geert Uytterhoeven geert+renesas@glider.be
[ Upstream commit 13132b3f44d3600983aceb7e9920b8ebb55a7cf8 ]
Configuration of the lcd0 pinmux group and GPIO hog for the external GPIO mux are done using a single device node, causing the "output-high" property to be applied to both. This will fail for the pinmux group, but doesn't cause any harm, as the failure is ignored silently.
However, after "pinctrl: sh-pfc: propagate errors on group config", the failure will become fatal, leading to a broken display:
sh-pfc e6050000.pin-controller: pin_config_group_set op failed for group 102 sh-pfc e6050000.pin-controller: Error applying setting, reverse things back sh-pfc e6050000.pin-controller: failed to select default state
Move the GPIO hog to its own node to fix this.
Fixes: ffd2f9a5afb730b9 ("ARM: shmobile: armadillo800eva dts: Add pinctrl and gpio-hog for lcdc0") Signed-off-by: Geert Uytterhoeven geert+renesas@glider.be Acked-by: Laurent Pinchart laurent.pinchart@ideasonboard.com Signed-off-by: Simon Horman horms+renesas@verge.net.au Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/arm/boot/dts/r8a7740-armadillo800eva.dts | 2 ++ 1 file changed, 2 insertions(+)
--- a/arch/arm/boot/dts/r8a7740-armadillo800eva.dts +++ b/arch/arm/boot/dts/r8a7740-armadillo800eva.dts @@ -266,7 +266,9 @@ lcd0_pins: lcd0 { groups = "lcd0_data24_0", "lcd0_lclk_1", "lcd0_sync"; function = "lcd0"; + };
+ lcd0_mux { /* DBGMD/LCDC0/FSIA MUX */ gpio-hog; gpios = <176 0>;