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JTAG pins are mapped as below. To access the JTAG pins, we need to control the GPIO pins from SPL which seems to be the earliest stage for JTAG. - JTAG nTRST: GPIO36 / Input - JTAG TDI: GPIO61 / Input - JTAG TMS: GPIO63 / Input - JTAG TCK: GPIO60 / Input - JTAG TDO: GPIO44 / Output Signed-off-by: Chanho Park <chanho61.park@samsung.com> Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>