[PATCH] lib: utils/serial: Support Synopsys DesignWare APB UART

[Jessica Clarke]

On 14 May 2021, at 02:16, Bin Meng <bmeng.cn at gmail.com> wrote:
> 
> Synopsys DesignWare APB UART is seen on the StarFive JH7100 SoC.
> Its programming interface is compatible with the existing 8250
> UART driver. Simply add its compatible string to the driver makes
> it work with the StarFive JH7100 SoC on a BeagleV board.
> 
> With this patch, the generic platform firmware can be used out of
> the box on the BeagleV board.
> 
> Signed-off-by: Bin Meng <bmeng.cn at gmail.com>
> ---
> 
> lib/utils/serial/fdt_serial_uart8250.c | 1 +
> 1 file changed, 1 insertion(+)
> 
> diff --git a/lib/utils/serial/fdt_serial_uart8250.c b/lib/utils/serial/fdt_serial_uart8250.c
> index 918193a..36f364c 100644
> --- a/lib/utils/serial/fdt_serial_uart8250.c
> +++ b/lib/utils/serial/fdt_serial_uart8250.c
> @@ -28,6 +28,7 @@ static int serial_uart8250_init(void *fdt, int nodeoff,
> static const struct fdt_match serial_uart8250_match[] = {
> 	{ .compatible = "ns16550" },
> 	{ .compatible = "ns16550a" },
> +	{ .compatible = "snps,dw-apb-uart" },

If it’s compatible, why does it not use

  compatible = “snps,dw-apb-uart”, “ns16550”;

or similar in its FDT?

Jess