Hi!

This patch adds a check for the GPIOs property existence, before the
GPIO is requested. This fixes an issue seen when the 8250 mctrl_gpio
support is added (2nd patch in this patch series) on x86 platforms using
ACPI.

Ok, so this fixes serial_mctrl_gpio on some ACPI systems. It should be
a NOP on Renesas hardware, right?

Do you need this one in 4.4? Was it tested on problematic ACPI system?

Best regards,
Pavel

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