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Thu, 14 Dec 2023 23:58:45 -0800 (PST) Received: from [192.168.1.20] ([178.197.218.27]) by smtp.gmail.com with ESMTPSA id qo5-20020a170907874500b00a1b7b0cc30dsm10410257ejc.7.2023.12.14.23.58.43 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 14 Dec 2023 23:58:45 -0800 (PST) Message-ID: <8e3335dc-915c-4db2-8884-e16795e166de@linaro.org> Date: Fri, 15 Dec 2023 08:58:42 +0100 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 04/13] dt-bindings: serial: samsung: gs101: make reg-io-width required property Content-Language: en-US To: Tudor Ambarus , peter.griffin@linaro.org, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, mturquette@baylibre.com, sboyd@kernel.org, conor+dt@kernel.org, andi.shyti@kernel.org, alim.akhtar@samsung.com, gregkh@linuxfoundation.org, jirislaby@kernel.org, catalin.marinas@arm.com, will@kernel.org, s.nawrocki@samsung.com, tomasz.figa@gmail.com, cw00.choi@samsung.com, arnd@arndb.de, semen.protsenko@linaro.org Cc: andre.draszik@linaro.org, saravanak@google.com, willmcvicker@google.com, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-clk@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-i2c@vger.kernel.org, linux-serial@vger.kernel.org References: <20231214105243.3707730-1-tudor.ambarus@linaro.org> <20231214105243.3707730-5-tudor.ambarus@linaro.org> From: Krzysztof Kozlowski Autocrypt: addr=krzysztof.kozlowski@linaro.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 14/12/2023 11:52, Tudor Ambarus wrote: > GS101 only allows 32-bit register accesses. When using 8-bit reg > accesses on gs101, a SError Interrupt is raised causing the system > unusable. > > Make reg-io-width a required property and expect for it a value of 4. > > Signed-off-by: Tudor Ambarus > --- > Documentation/devicetree/bindings/serial/samsung_uart.yaml | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/Documentation/devicetree/bindings/serial/samsung_uart.yaml b/Documentation/devicetree/bindings/serial/samsung_uart.yaml > index 133259ed3a34..cc896d7e2a3d 100644 > --- a/Documentation/devicetree/bindings/serial/samsung_uart.yaml > +++ b/Documentation/devicetree/bindings/serial/samsung_uart.yaml > @@ -143,6 +143,10 @@ allOf: > then: > required: > - samsung,uart-fifosize > + - reg-io-width > + properties: > + reg-io-width: > + const: 4 If all your ports are like this, then I say this is compatible-specific. Make it here "reg-io-width: false" and set in the driver proper type in s3c24xx_serial_init_port_default() (or new function). Although maybe let's first resolve discussion of next patch. Best regards, Krzysztof