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From:   Arnd Bergmann <arnd@arndb.de>
Date:   Mon, 23 May 2022 11:56:09 +0200
Message-ID: <CAK8P3a0Nh4m7O_WPe1DTWqwWU32C5khOPH0ir7r_=s106mLv5A@mail.gmail.com>
Subject: Re: [PATCH v1 04/19] tty: serial: 8250: Add NPCM845 UART support
To:     Tomer Maimon <tmaimon77@gmail.com>
Cc:     Avi Fishman <avifishman70@gmail.com>,
        Tali Perry <tali.perry1@gmail.com>,
        Joel Stanley <joel@jms.id.au>,
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On Sun, May 22, 2022 at 5:50 PM Tomer Maimon <tmaimon77@gmail.com> wrote:
> +++ b/drivers/tty/serial/8250/8250_of.c
> @@ -333,6 +333,7 @@ static const struct of_device_id of_platform_serial_table[] = {
>         { .compatible = "ti,da830-uart", .data = (void *)PORT_DA830, },
>         { .compatible = "nuvoton,wpcm450-uart", .data = (void *)PORT_NPCM, },
>         { .compatible = "nuvoton,npcm750-uart", .data = (void *)PORT_NPCM, },
> +       { .compatible = "nuvoton,npcm845-uart", .data = (void *)PORT_NPCM, },
>         { /* end of list */ },

If these are compatible devices, it's usually easier to claim
compatibility with both the specific chip and the older model
as a fallback, to avoid driver changes. This seems to apply to
the timer and watchdog devices as well.

       Arnd