From: Sam Protsenko <semen.protsenko@linaro.org> To: Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>, Andi Shyti <andi.shyti@kernel.org>, Mark Brown <broonie@kernel.org>, Rob Herring <robh+dt@kernel.org>, Conor Dooley <conor+dt@kernel.org> Cc: Alim Akhtar <alim.akhtar@samsung.com>, Sylwester Nawrocki <s.nawrocki@samsung.com>, Tomasz Figa <tomasz.figa@gmail.com>, Chanwoo Choi <cw00.choi@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, linux-clk@vger.kernel.org Subject: [PATCH 0/7] arm64: exynos: Enable SPI for Exynos850 Date: Fri, 19 Jan 2024 19:29:41 -0600 [thread overview] Message-ID: <20240120012948.8836-1-semen.protsenko@linaro.org> (raw) This series enables SPI for Exynos850 SoC. The summary: 1. Enable PDMA, it's needed for SPI (dts, clk) 2. Propagate SPI src clock rate change up to DIV clocks, to make it possible to change SPI frequency (clk driver) 3. Add Exynos850 support in SPI driver 4. Add SPI nodes to Exynos850 SoC dtsi All SPI instances were tested using `spidev_test' tool in all 3 possible modes: - Polling mode: xfer_size <= 32 - IRQ mode: 64 >= xfer_size >= 32 - DMA mode: xfer_size > 64 with 200 kHz ... 49.9 MHz SPI frequencies. The next 3 approaches were used: 1. Software loopback ('-l' option for `spidev_test' tool) 2. Hardware loopback (by connecting MISO line to MOSI) 3. By communicating with ATMega found on Sensors Mezzanine board [1], programmed to act as an SPI slave device and all the transactions were additionally checked on my Logic Analyzer to make sure the SCK frequencies were actually correct. [1] https://www.96boards.org/product/sensors-mezzanine/ Sam Protsenko (7): dt-bindings: clock: exynos850: Add PDMA clocks dt-bindings: spi: samsung: Add Exynos850 SPI clk: samsung: exynos850: Add PDMA clocks clk: samsung: exynos850: Propagate SPI IPCLK rate change spi: s3c64xx: Add Exynos850 support arm64: dts: exynos: Add PDMA node for Exynos850 arm64: dts: exynos: Add SPI nodes for Exynos850 .../devicetree/bindings/spi/samsung,spi.yaml | 1 + arch/arm64/boot/dts/exynos/exynos850.dtsi | 64 +++++++++++++++++++ drivers/clk/samsung/clk-exynos850.c | 42 +++++++----- drivers/spi/spi-s3c64xx.c | 14 ++++ include/dt-bindings/clock/exynos850.h | 2 + 5 files changed, 106 insertions(+), 17 deletions(-) -- 2.39.2
WARNING: multiple messages have this Message-ID (diff)
From: Sam Protsenko <semen.protsenko@linaro.org> To: Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>, Andi Shyti <andi.shyti@kernel.org>, Mark Brown <broonie@kernel.org>, Rob Herring <robh+dt@kernel.org>, Conor Dooley <conor+dt@kernel.org> Cc: Alim Akhtar <alim.akhtar@samsung.com>, Sylwester Nawrocki <s.nawrocki@samsung.com>, Tomasz Figa <tomasz.figa@gmail.com>, Chanwoo Choi <cw00.choi@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, linux-clk@vger.kernel.org Subject: [PATCH 0/7] arm64: exynos: Enable SPI for Exynos850 Date: Fri, 19 Jan 2024 19:29:41 -0600 [thread overview] Message-ID: <20240120012948.8836-1-semen.protsenko@linaro.org> (raw) This series enables SPI for Exynos850 SoC. The summary: 1. Enable PDMA, it's needed for SPI (dts, clk) 2. Propagate SPI src clock rate change up to DIV clocks, to make it possible to change SPI frequency (clk driver) 3. Add Exynos850 support in SPI driver 4. Add SPI nodes to Exynos850 SoC dtsi All SPI instances were tested using `spidev_test' tool in all 3 possible modes: - Polling mode: xfer_size <= 32 - IRQ mode: 64 >= xfer_size >= 32 - DMA mode: xfer_size > 64 with 200 kHz ... 49.9 MHz SPI frequencies. The next 3 approaches were used: 1. Software loopback ('-l' option for `spidev_test' tool) 2. Hardware loopback (by connecting MISO line to MOSI) 3. By communicating with ATMega found on Sensors Mezzanine board [1], programmed to act as an SPI slave device and all the transactions were additionally checked on my Logic Analyzer to make sure the SCK frequencies were actually correct. [1] https://www.96boards.org/product/sensors-mezzanine/ Sam Protsenko (7): dt-bindings: clock: exynos850: Add PDMA clocks dt-bindings: spi: samsung: Add Exynos850 SPI clk: samsung: exynos850: Add PDMA clocks clk: samsung: exynos850: Propagate SPI IPCLK rate change spi: s3c64xx: Add Exynos850 support arm64: dts: exynos: Add PDMA node for Exynos850 arm64: dts: exynos: Add SPI nodes for Exynos850 .../devicetree/bindings/spi/samsung,spi.yaml | 1 + arch/arm64/boot/dts/exynos/exynos850.dtsi | 64 +++++++++++++++++++ drivers/clk/samsung/clk-exynos850.c | 42 +++++++----- drivers/spi/spi-s3c64xx.c | 14 ++++ include/dt-bindings/clock/exynos850.h | 2 + 5 files changed, 106 insertions(+), 17 deletions(-) -- 2.39.2 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next reply other threads:[~2024-01-20 1:29 UTC|newest] Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top 2024-01-20 1:29 Sam Protsenko [this message] 2024-01-20 1:29 ` [PATCH 0/7] arm64: exynos: Enable SPI for Exynos850 Sam Protsenko 2024-01-20 1:29 ` [PATCH 1/7] dt-bindings: clock: exynos850: Add PDMA clocks Sam Protsenko 2024-01-20 1:29 ` Sam Protsenko 2024-01-23 12:54 ` (subset) " Krzysztof Kozlowski 2024-01-23 12:54 ` Krzysztof Kozlowski 2024-01-20 1:29 ` [PATCH 2/7] dt-bindings: spi: samsung: Add Exynos850 SPI Sam Protsenko 2024-01-20 1:29 ` Sam Protsenko 2024-01-23 12:22 ` Krzysztof Kozlowski 2024-01-23 12:22 ` Krzysztof Kozlowski 2024-01-24 6:32 ` Tudor Ambarus 2024-01-24 6:32 ` Tudor Ambarus 2024-01-20 1:29 ` [PATCH 3/7] clk: samsung: exynos850: Add PDMA clocks Sam Protsenko 2024-01-20 1:29 ` Sam Protsenko 2024-01-23 12:54 ` (subset) " Krzysztof Kozlowski 2024-01-23 12:54 ` Krzysztof Kozlowski 2024-01-20 1:29 ` [PATCH 4/7] clk: samsung: exynos850: Propagate SPI IPCLK rate change Sam Protsenko 2024-01-20 1:29 ` Sam Protsenko 2024-01-23 12:49 ` Krzysztof Kozlowski 2024-01-23 12:49 ` Krzysztof Kozlowski 2024-01-20 1:29 ` [PATCH 5/7] spi: s3c64xx: Add Exynos850 support Sam Protsenko 2024-01-20 1:29 ` Sam Protsenko 2024-01-24 6:49 ` Tudor Ambarus 2024-01-24 6:49 ` Tudor Ambarus 2024-01-24 19:51 ` Sam Protsenko 2024-01-24 19:51 ` Sam Protsenko 2024-01-20 1:29 ` [PATCH 6/7] arm64: dts: exynos: Add PDMA node for Exynos850 Sam Protsenko 2024-01-20 1:29 ` Sam Protsenko 2024-01-23 12:55 ` Krzysztof Kozlowski 2024-01-23 12:55 ` Krzysztof Kozlowski 2024-01-20 1:29 ` [PATCH 7/7] arm64: dts: exynos: Add SPI nodes " Sam Protsenko 2024-01-20 1:29 ` Sam Protsenko 2024-01-23 12:56 ` Krzysztof Kozlowski 2024-01-23 12:56 ` Krzysztof Kozlowski 2024-01-25 14:02 ` (subset) [PATCH 0/7] arm64: exynos: Enable SPI " Mark Brown 2024-01-25 14:02 ` Mark Brown
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