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In Linux 8250 driver, it has different flags for UART ports. For COM1, COM2 and COM3, UPF_SKIP_TEST is set, which is used to skip the loopback test for the port. But for COM4, UPF_SKIP_TEST is not set, so when probing COM4, the driver will access MCR and MSR registers to make sure the port is exsit. So, add support for MSR and MCR. Default ports info: COM1, ttyS0, 0x3F8 COM2, ttyS1, 0x2F8 COM3, ttyS2, 0x3E8 COM4, ttyS3, 0x2E8 Tracked-On: #2987 Signed-off-by: Conghui Chen <conghui.chen@intel.com> Acked-by: Eddie Dong <eddie.dong@intel.com> |
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.. | ||
console.h | ||
dbg_cmd.h | ||
dump.h | ||
logmsg.h | ||
npk_log.h | ||
profiling_internal.h | ||
profiling.h | ||
sbuf.h | ||
shell.h | ||
trace.h | ||
uart16550.h |