From: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> To: Rob Herring <robh+dt@kernel.org>, Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>, Alim Akhtar <alim.akhtar@samsung.com>, Tomasz Figa <tomasz.figa@gmail.com>, Sylwester Nawrocki <s.nawrocki@samsung.com>, Linus Walleij <linus.walleij@linaro.org>, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org Cc: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Subject: [PATCH 0/7] pinctrl/arm: dt-bindings: deprecate header with register constants Date: Thu, 26 May 2022 16:37:00 +0200 [thread overview] Message-ID: <20220526143707.767490-1-krzysztof.kozlowski@linaro.org> (raw) Hi, The Samsung pin controller drivers were always expecting DTS to use raw register values for pin configuration (e.g. pull up/down, drive strength). DTS had these values hard-coded all over, so at some point we decided for convenience to move them to dt-bindings header. Less code duplication, some meaning added to raw number, etc. However these constants do not fit the purpose of bindings. They do not provide any abstraction, any hardware and driver independent ID. With minor exceptions, the Linux drivers actually do not use the bindings header at all. Because of this "dt-bindings ID" approach, these constants were re-used between chips, e.g. Exynos ones in S5PV210. These does not make much sense because the values between Exynos and S5PV210 (or S3C24xx) are not related. If it was an abstraction ID, this would be fine. But it's not. Clean this up by: 1. Moving the constants to DTS-local headers. 2. Deprecating the bindings header. Tested by comparing DTBs (dtx_diff, fdtdump). Best regards, Krzysztof Krzysztof Kozlowski (7): ARM: dts: s3c2410: use local header for pinctrl register values ARM: dts: s3c64xx: use local header for pinctrl register values ARM: dts: s5pv210: use local header for pinctrl register values ARM: dts: exynos: use local header for pinctrl register values arm64: dts: exynos: use local header for pinctrl register values arm64: dts: fsd: use local header for pinctrl register values dt-bindings: pinctrl: deprecate header with register constants arch/arm/boot/dts/exynos-pinctrl.h | 55 ++ arch/arm/boot/dts/exynos3250-pinctrl.dtsi | 2 +- arch/arm/boot/dts/exynos4210-pinctrl.dtsi | 2 +- arch/arm/boot/dts/exynos4412-midas.dtsi | 3 +- arch/arm/boot/dts/exynos4412-p4note.dtsi | 2 +- arch/arm/boot/dts/exynos4412-pinctrl.dtsi | 2 +- arch/arm/boot/dts/exynos5250-pinctrl.dtsi | 2 +- arch/arm/boot/dts/exynos5260-pinctrl.dtsi | 2 +- arch/arm/boot/dts/exynos5410-pinctrl.dtsi | 2 +- arch/arm/boot/dts/exynos5420-pinctrl.dtsi | 2 +- arch/arm/boot/dts/s3c2410-pinctrl.h | 19 + arch/arm/boot/dts/s3c2416-pinctrl.dtsi | 38 +- arch/arm/boot/dts/s3c64xx-pinctrl.dtsi | 178 +++---- arch/arm/boot/dts/s3c64xx-pinctrl.h | 27 + arch/arm/boot/dts/s5pv210-aquila.dts | 4 +- arch/arm/boot/dts/s5pv210-aries.dtsi | 134 ++--- arch/arm/boot/dts/s5pv210-fascinate4g.dts | 22 +- arch/arm/boot/dts/s5pv210-galaxys.dts | 34 +- arch/arm/boot/dts/s5pv210-pinctrl.dtsi | 480 +++++++++--------- arch/arm/boot/dts/s5pv210-pinctrl.h | 39 ++ arch/arm64/boot/dts/exynos/exynos-pinctrl.h | 79 +++ .../boot/dts/exynos/exynos5433-pinctrl.dtsi | 2 +- .../boot/dts/exynos/exynos7-espresso.dts | 6 +- .../boot/dts/exynos/exynos7-pinctrl.dtsi | 72 +-- .../boot/dts/exynos/exynos7885-pinctrl.dtsi | 2 +- .../boot/dts/exynos/exynos850-pinctrl.dtsi | 2 +- .../boot/dts/exynos/exynosautov9-pinctrl.dtsi | 2 +- arch/arm64/boot/dts/tesla/fsd-pinctrl.dtsi | 92 ++-- arch/arm64/boot/dts/tesla/fsd-pinctrl.h | 33 ++ drivers/pinctrl/samsung/pinctrl-exynos.c | 6 +- drivers/pinctrl/samsung/pinctrl-exynos.h | 3 + drivers/pinctrl/samsung/pinctrl-samsung.c | 4 +- drivers/pinctrl/samsung/pinctrl-samsung.h | 8 + include/dt-bindings/pinctrl/samsung.h | 3 + 34 files changed, 813 insertions(+), 550 deletions(-) create mode 100644 arch/arm/boot/dts/exynos-pinctrl.h create mode 100644 arch/arm/boot/dts/s3c2410-pinctrl.h create mode 100644 arch/arm/boot/dts/s3c64xx-pinctrl.h create mode 100644 arch/arm/boot/dts/s5pv210-pinctrl.h create mode 100644 arch/arm64/boot/dts/exynos/exynos-pinctrl.h create mode 100644 arch/arm64/boot/dts/tesla/fsd-pinctrl.h -- 2.34.1
WARNING: multiple messages have this Message-ID (diff)
From: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> To: Rob Herring <robh+dt@kernel.org>, Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>, Alim Akhtar <alim.akhtar@samsung.com>, Tomasz Figa <tomasz.figa@gmail.com>, Sylwester Nawrocki <s.nawrocki@samsung.com>, Linus Walleij <linus.walleij@linaro.org>, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org Cc: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Subject: [PATCH 0/7] pinctrl/arm: dt-bindings: deprecate header with register constants Date: Thu, 26 May 2022 16:37:00 +0200 [thread overview] Message-ID: <20220526143707.767490-1-krzysztof.kozlowski@linaro.org> (raw) Hi, The Samsung pin controller drivers were always expecting DTS to use raw register values for pin configuration (e.g. pull up/down, drive strength). DTS had these values hard-coded all over, so at some point we decided for convenience to move them to dt-bindings header. Less code duplication, some meaning added to raw number, etc. However these constants do not fit the purpose of bindings. They do not provide any abstraction, any hardware and driver independent ID. With minor exceptions, the Linux drivers actually do not use the bindings header at all. Because of this "dt-bindings ID" approach, these constants were re-used between chips, e.g. Exynos ones in S5PV210. These does not make much sense because the values between Exynos and S5PV210 (or S3C24xx) are not related. If it was an abstraction ID, this would be fine. But it's not. Clean this up by: 1. Moving the constants to DTS-local headers. 2. Deprecating the bindings header. Tested by comparing DTBs (dtx_diff, fdtdump). Best regards, Krzysztof Krzysztof Kozlowski (7): ARM: dts: s3c2410: use local header for pinctrl register values ARM: dts: s3c64xx: use local header for pinctrl register values ARM: dts: s5pv210: use local header for pinctrl register values ARM: dts: exynos: use local header for pinctrl register values arm64: dts: exynos: use local header for pinctrl register values arm64: dts: fsd: use local header for pinctrl register values dt-bindings: pinctrl: deprecate header with register constants arch/arm/boot/dts/exynos-pinctrl.h | 55 ++ arch/arm/boot/dts/exynos3250-pinctrl.dtsi | 2 +- arch/arm/boot/dts/exynos4210-pinctrl.dtsi | 2 +- arch/arm/boot/dts/exynos4412-midas.dtsi | 3 +- arch/arm/boot/dts/exynos4412-p4note.dtsi | 2 +- arch/arm/boot/dts/exynos4412-pinctrl.dtsi | 2 +- arch/arm/boot/dts/exynos5250-pinctrl.dtsi | 2 +- arch/arm/boot/dts/exynos5260-pinctrl.dtsi | 2 +- arch/arm/boot/dts/exynos5410-pinctrl.dtsi | 2 +- arch/arm/boot/dts/exynos5420-pinctrl.dtsi | 2 +- arch/arm/boot/dts/s3c2410-pinctrl.h | 19 + arch/arm/boot/dts/s3c2416-pinctrl.dtsi | 38 +- arch/arm/boot/dts/s3c64xx-pinctrl.dtsi | 178 +++---- arch/arm/boot/dts/s3c64xx-pinctrl.h | 27 + arch/arm/boot/dts/s5pv210-aquila.dts | 4 +- arch/arm/boot/dts/s5pv210-aries.dtsi | 134 ++--- arch/arm/boot/dts/s5pv210-fascinate4g.dts | 22 +- arch/arm/boot/dts/s5pv210-galaxys.dts | 34 +- arch/arm/boot/dts/s5pv210-pinctrl.dtsi | 480 +++++++++--------- arch/arm/boot/dts/s5pv210-pinctrl.h | 39 ++ arch/arm64/boot/dts/exynos/exynos-pinctrl.h | 79 +++ .../boot/dts/exynos/exynos5433-pinctrl.dtsi | 2 +- .../boot/dts/exynos/exynos7-espresso.dts | 6 +- .../boot/dts/exynos/exynos7-pinctrl.dtsi | 72 +-- .../boot/dts/exynos/exynos7885-pinctrl.dtsi | 2 +- .../boot/dts/exynos/exynos850-pinctrl.dtsi | 2 +- .../boot/dts/exynos/exynosautov9-pinctrl.dtsi | 2 +- arch/arm64/boot/dts/tesla/fsd-pinctrl.dtsi | 92 ++-- arch/arm64/boot/dts/tesla/fsd-pinctrl.h | 33 ++ drivers/pinctrl/samsung/pinctrl-exynos.c | 6 +- drivers/pinctrl/samsung/pinctrl-exynos.h | 3 + drivers/pinctrl/samsung/pinctrl-samsung.c | 4 +- drivers/pinctrl/samsung/pinctrl-samsung.h | 8 + include/dt-bindings/pinctrl/samsung.h | 3 + 34 files changed, 813 insertions(+), 550 deletions(-) create mode 100644 arch/arm/boot/dts/exynos-pinctrl.h create mode 100644 arch/arm/boot/dts/s3c2410-pinctrl.h create mode 100644 arch/arm/boot/dts/s3c64xx-pinctrl.h create mode 100644 arch/arm/boot/dts/s5pv210-pinctrl.h create mode 100644 arch/arm64/boot/dts/exynos/exynos-pinctrl.h create mode 100644 arch/arm64/boot/dts/tesla/fsd-pinctrl.h -- 2.34.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next reply other threads:[~2022-05-26 14:37 UTC|newest] Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-05-26 14:37 Krzysztof Kozlowski [this message] 2022-05-26 14:37 ` [PATCH 0/7] pinctrl/arm: dt-bindings: deprecate header with register constants Krzysztof Kozlowski 2022-05-26 14:37 ` [PATCH 1/7] ARM: dts: s3c2410: use local header for pinctrl register values Krzysztof Kozlowski 2022-05-26 14:37 ` Krzysztof Kozlowski 2022-05-27 4:22 ` Chanho Park 2022-05-27 4:22 ` Chanho Park 2022-05-29 8:07 ` Krzysztof Kozlowski 2022-05-29 8:07 ` Krzysztof Kozlowski 2022-05-26 14:37 ` [PATCH 2/7] ARM: dts: s3c64xx: " Krzysztof Kozlowski 2022-05-26 14:37 ` Krzysztof Kozlowski 2022-05-27 4:26 ` Chanho Park 2022-05-27 4:26 ` Chanho Park 2022-05-26 14:37 ` [PATCH 3/7] ARM: dts: s5pv210: " Krzysztof Kozlowski 2022-05-26 14:37 ` Krzysztof Kozlowski 2022-05-26 14:37 ` [PATCH 4/7] ARM: dts: exynos: " Krzysztof Kozlowski 2022-05-26 14:37 ` Krzysztof Kozlowski 2022-05-26 14:37 ` [PATCH 5/7] arm64: " Krzysztof Kozlowski 2022-05-26 14:37 ` Krzysztof Kozlowski 2022-05-27 3:34 ` Chanho Park 2022-05-27 3:34 ` Chanho Park 2022-05-26 14:37 ` [PATCH 6/7] arm64: dts: fsd: " Krzysztof Kozlowski 2022-05-26 14:37 ` Krzysztof Kozlowski 2022-05-26 14:37 ` [PATCH 7/7] dt-bindings: pinctrl: deprecate header with register constants Krzysztof Kozlowski 2022-05-26 14:37 ` Krzysztof Kozlowski 2022-06-03 22:20 ` Linus Walleij 2022-06-03 22:20 ` Linus Walleij 2022-06-05 15:19 ` Krzysztof Kozlowski 2022-06-05 15:19 ` Krzysztof Kozlowski
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