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Thu, 12 Oct 2023 07:10:53 -0700 (PDT) Received: from [192.168.1.20] ([178.197.219.100]) by smtp.gmail.com with ESMTPSA id t25-20020a1c7719000000b004065daba6casm22154892wmi.46.2023.10.12.07.10.51 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 12 Oct 2023 07:10:53 -0700 (PDT) Message-ID: Date: Thu, 12 Oct 2023 16:10:50 +0200 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 16/20] tty: serial: samsung: Add gs101 compatible and SoC data Content-Language: en-US To: Peter Griffin Cc: robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, mturquette@baylibre.com, conor+dt@kernel.org, sboyd@kernel.org, tomasz.figa@gmail.com, s.nawrocki@samsung.com, linus.walleij@linaro.org, wim@linux-watchdog.org, linux@roeck-us.net, catalin.marinas@arm.com, will@kernel.org, arnd@arndb.de, olof@lixom.net, gregkh@linuxfoundation.org, cw00.choi@samsung.com, tudor.ambarus@linaro.org, andre.draszik@linaro.org, semen.protsenko@linaro.org, saravanak@google.com, willmcvicker@google.com, soc@kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-clk@vger.kernel.org, linux-gpio@vger.kernel.org, linux-watchdog@vger.kernel.org, kernel-team@android.com, linux-serial@vger.kernel.org References: <20231011184823.443959-1-peter.griffin@linaro.org> <20231011184823.443959-17-peter.griffin@linaro.org> From: Krzysztof Kozlowski Autocrypt: addr=krzysztof.kozlowski@linaro.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_BLOCKED, SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net On 12/10/2023 16:03, Peter Griffin wrote: > Hi Krzysztof, > > On Thu, 12 Oct 2023 at 07:26, Krzysztof Kozlowski > wrote: >> >> On 11/10/2023 20:48, Peter Griffin wrote: >>> Add serial driver data for Google Tensor gs101 SoC. >>> >>> Signed-off-by: Peter Griffin >>> --- >>> 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 07fb8a9dac63..26bc52e681a4 100644 >>> --- a/drivers/tty/serial/samsung_tty.c >>> +++ b/drivers/tty/serial/samsung_tty.c >>> @@ -2597,14 +2597,22 @@ static const struct s3c24xx_serial_drv_data exynos850_serial_drv_data = { >>> .fifosize = { 256, 64, 64, 64 }, >>> }; >>> >>> +static const struct s3c24xx_serial_drv_data gs101_serial_drv_data = { >>> + EXYNOS_COMMON_SERIAL_DRV_DATA(), >>> + /* rely on samsung,uart-fifosize DT property for fifosize */ >> >> It's an optional property, so you cannot rely on it. > > Is it possible to make it a mandatory DT property for certain SoCs? Yes. > >> >>> + .fifosize = { 0 }, > > I can update this to 256, and we can add more sizes as we enable other > UARTs I suppose. You might also want to fix Arnd's comment, but anyway drivers must be in match with bindings. > > What's the purpose of having fifosize specified in DT and in *_serial_drv_data? I guess safe defaults? Best regards, Krzysztof