On 11 May 2016 at 08:45, Bin Meng bmeng.cn@gmail.com wrote:
BayTrail integrates an internal ns15550 compatible UART (PNP0501). Its IRQ is hardwired to IRQ3 in old revision chipset, but in newer revision one IRQ4 is being used for ISA compatibility. Handle this correctly in the ASL file.
Linux does not need this ASL, but Windows need this to correctly discover a COM port existing in the system so that Windows can show it in the 'Device Manager' window, and expose this COM port to any terminal emulation application.
Signed-off-by: Bin Meng bmeng.cn@gmail.com
Changes in v2: None
.../include/asm/arch-baytrail/acpi/irqlinks.asl | 4 ++ arch/x86/include/asm/arch-baytrail/acpi/lpc.asl | 60 ++++++++++++++++++++++ 2 files changed, 64 insertions(+)
Reviewed-by: Simon Glass sjg@chromium.org