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Thu, 13 Feb 2025 22:53:07 -0800 (PST) Message-ID: <4dcf3258-5e98-4f6d-bce0-e79c36f1f8ca@linaro.org> Date: Fri, 14 Feb 2025 06:53:05 +0000 Precedence: bulk X-Mailing-List: linux-spi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 0/3] spi: s3c64xx: add support exynos990-spi to new port config data To: Denzeel Oliva , andi.shyti@kernel.org, broonie@kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, alim.akhtar@samsung.com, linux-spi@vger.kernel.org, linux-samsung-soc@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org References: <20250214043343.263-1-wachiturroxd150@gmail.com> Content-Language: en-US From: Tudor Ambarus In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 2/14/25 5:31 AM, Denzeel Oliva wrote: > On Fri, Feb 14, 2025 at 04:33:40AM +0000, Denzeel Oliva wrote: >> Changes in v3: >> - Reordered fifo_depth handling in s3c64xx_spi_probe() so that the DT >> property takes precedence over the default value in port_config. >> This allows node-specific FIFO depths to be applied correctly while >> preserving a fallback. > > Showing evidence: > [ 0.339111] s3c64xx-spi 10920000.spi: spi bus clock parent not specified, using clock at index 0 as parent > [ 0.339119] s3c64xx-spi 10920000.spi: number of chip select lines not specified, assuming 1 chip select line > [ 0.339467] s3c64xx-spi 10920000.spi: registered host spi0 > [ 0.339589] s3c64xx-spi 10920000.spi: Samsung SoC SPI Driver loaded for Bus SPI-0 with 1 Targets attached > [ 0.339597] s3c64xx-spi 10920000.spi: IOmem=[[mem 0x10920000-0x1092002f]] FIFO 256bytes > ------------------------------------------------------------------------------------------------------------- > [ 0.587452] s3c64xx-spi 10650000.spi: spi bus clock parent not specified, using clock at index 0 as parent > [ 0.587462] s3c64xx-spi 10650000.spi: number of chip select lines not specified, assuming 1 chip select line > [ 0.587847] s3c64xx-spi 10650000.spi: registered host spi1 > [ 0.587986] s3c64xx-spi 10650000.spi: Samsung SoC SPI Driver loaded for Bus SPI-1 with 1 Targets attached > [ 0.587997] s3c64xx-spi 10650000.spi: IOmem=[[mem 0x10650000-0x1065002f]] FIFO 64bytes > Why does this prove that the IP works? Can you do a loopback test? See drivers/spi/spi-loopback-test.c