linux-kernel - Re: [PATCH 06/12] tty: serial: samsung: Add Exynos850 SoC data

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Date:   Fri, 30 Jul 2021 18:05:43 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
To:     Sam Protsenko <semen.protsenko@...aro.org>,
        Sylwester Nawrocki <s.nawrocki@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Tomasz Figa <tomasz.figa@...il.com>
Cc:     Rob Herring <robh+dt@...nel.org>, Stephen Boyd <sboyd@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Jiri Slaby <jirislaby@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Charles Keepax <ckeepax@...nsource.wolfsonmicro.com>,
        Ryu Euiyoul <ryu.real@...sung.com>,
        Tom Gall <tom.gall@...aro.org>,
        Sumit Semwal <sumit.semwal@...aro.org>,
        John Stultz <john.stultz@...aro.org>,
        Amit Pundir <amit.pundir@...aro.org>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-clk@...r.kernel.org, linux-gpio@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
        linux-serial@...r.kernel.org
Subject: Re: [PATCH 06/12] tty: serial: samsung: Add Exynos850 SoC data

On 30/07/2021 16:49, Sam Protsenko wrote:
> Add serial driver data for Exynos850 SoC. This driver data is basically
> reusing EXYNOS_COMMON_SERIAL_DRV_DATA, which is common for all Exynos
> chips, but also enables USI init, which was added in previous commit:
> "tty: serial: samsung: Init USI to keep clocks running".
> 
> Signed-off-by: Sam Protsenko <semen.protsenko@...aro.org>
> ---
>  drivers/tty/serial/samsung_tty.c | 13 +++++++++++++
>  1 file changed, 13 insertions(+)
> 
> diff --git a/drivers/tty/serial/samsung_tty.c b/drivers/tty/serial/samsung_tty.c
> index 75ccbb08df4a..d059b516a0f4 100644
> --- a/drivers/tty/serial/samsung_tty.c
> +++ b/drivers/tty/serial/samsung_tty.c
> @@ -2814,11 +2814,19 @@ static struct s3c24xx_serial_drv_data exynos5433_serial_drv_data = {
>  	.fifosize = { 64, 256, 16, 256 },
>  };
>  
> +static struct s3c24xx_serial_drv_data exynos850_serial_drv_data = {
> +	EXYNOS_COMMON_SERIAL_DRV_DATA_USI(1),
> +	.fifosize = { 0, },

This does not look correct. You rely on samsung,uart-fifosize property
but it is optional.


Best regards,
Krzysztof