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Previously we assume only 1 UART8250 instance can be used. Now we support multiple instances by introducing counterpart functions to putc/getc/init which take an extra *dev parameter, and name them as uart8250_device_xyz() The original functions without the *dev parameter will operate on the default instance exactly the same as before, so no changes on the caller is required. Note: uart8250_device_init only does device initialization without the console registration logic. Signed-off-by: Bo Gan <ganboing@gmail.com> Reviewed-by: Anup Patel <anup@brainfault.org> Link: https://lore.kernel.org/r/20251218104243.562667-7-ganboing@gmail.com Signed-off-by: Anup Patel <anup@brainfault.org>