| Message ID | 20240620054024.43627-2-kanakshilledar@gmail.com |
|---|---|
| State | New |
| Headers | show |
| Series | [v2] dt-bindings: i2c: nxp,lpc1788-i2c: convert to dt schema | expand |
On Thu, Jun 20, 2024 at 4:27 PM Krzysztof Kozlowski <krzk@kernel.org> wrote: > > On 20/06/2024 07:40, Kanak Shilledar wrote: > > Convert the NXP I2C controller for LPC2xxx/178x/18xx/43xx > > to newer DT schema. Created DT schema based on the .txt file > > which had `compatible`, `reg`, `interrupts`, `clocks`, > > `#address-cells` and `#size-cells` as required properties. > > > > Thank you for your patch. There is something to discuss/improve. > > > > + clocks: > > + maxItems: 1 > > + > > + clock-frequency: > > + description: the desired I2C bus clock frequency in Hz > > + default: 100000 > > + > > + resets: > > + maxItems: 1 > > + > > +required: > > + - compatible > > + - reg > > + - interrupts > > + - clocks > > + - "#address-cells" > > + - "#size-cells" > > These should not be required, because you can have an enabled I2C > controller without children in DT. You suggest removing the address cells and size cells from the required properties? I saw a few i2c dt-bindings and these had the address cells and size cells in the required property. > > > Best regards, > Krzysztof Thanks and Regards, Kanak Shilledar
On 24/06/2024 09:09, Kanak Shilledar wrote: >>> + >>> +required: >>> + - compatible >>> + - reg >>> + - interrupts >>> + - clocks >>> + - "#address-cells" >>> + - "#size-cells" >> >> These should not be required, because you can have an enabled I2C >> controller without children in DT. > > You suggest removing the address cells and size cells from the > required properties? Yes. > I saw a few i2c dt-bindings and these had the address cells and size > cells in the required > property. Could be. Best regards, Krzysztof
diff --git a/Documentation/devicetree/bindings/i2c/i2c-lpc2k.txt b/Documentation/devicetree/bindings/i2c/i2c-lpc2k.txt deleted file mode 100644 index 4101aa621ad4..000000000000 --- a/Documentation/devicetree/bindings/i2c/i2c-lpc2k.txt +++ /dev/null @@ -1,33 +0,0 @@ -NXP I2C controller for LPC2xxx/178x/18xx/43xx - -Required properties: - - compatible: must be "nxp,lpc1788-i2c" - - reg: physical address and length of the device registers - - interrupts: a single interrupt specifier - - clocks: clock for the device - - #address-cells: should be <1> - - #size-cells: should be <0> - -Optional properties: -- clock-frequency: the desired I2C bus clock frequency in Hz; in - absence of this property the default value is used (100 kHz). - -Example: -i2c0: i2c@400a1000 { - compatible = "nxp,lpc1788-i2c"; - reg = <0x400a1000 0x1000>; - interrupts = <18>; - clocks = <&ccu1 CLK_APB1_I2C0>; - #address-cells = <1>; - #size-cells = <0>; -}; - -&i2c0 { - clock-frequency = <400000>; - - lm75@48 { - compatible = "nxp,lm75"; - reg = <0x48>; - }; -}; - diff --git a/Documentation/devicetree/bindings/i2c/nxp,lpc1788-i2c.yaml b/Documentation/devicetree/bindings/i2c/nxp,lpc1788-i2c.yaml new file mode 100644 index 000000000000..8caafe48edb6 --- /dev/null +++ b/Documentation/devicetree/bindings/i2c/nxp,lpc1788-i2c.yaml @@ -0,0 +1,56 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/i2c/nxp,lpc1788-i2c.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: NXP I2C controller for LPC2xxx/178x/18xx/43xx + +maintainers: + - Vladimir Zapolskiy <vz@mleia.com> + +allOf: + - $ref: /schemas/i2c/i2c-controller.yaml# + +properties: + compatible: + const: nxp,lpc1788-i2c + + reg: + maxItems: 1 + + interrupts: + maxItems: 1 + + clocks: + maxItems: 1 + + clock-frequency: + description: the desired I2C bus clock frequency in Hz + default: 100000 + + resets: + maxItems: 1 + +required: + - compatible + - reg + - interrupts + - clocks + - "#address-cells" + - "#size-cells" + +unevaluatedProperties: false + +examples: + - | + #include "dt-bindings/clock/lpc18xx-ccu.h" + + i2c@400a1000 { + compatible = "nxp,lpc1788-i2c"; + reg = <0x400a1000 0x1000>; + interrupts = <18>; + clocks = <&ccu1 CLK_APB1_I2C0>; + #address-cells = <1>; + #size-cells = <0>; + }; diff --git a/MAINTAINERS b/MAINTAINERS index cf9c9221c388..920e4f28b5ae 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -2374,7 +2374,7 @@ ARM/LPC18XX ARCHITECTURE M: Vladimir Zapolskiy <vz@mleia.com> L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers) S: Maintained -F: Documentation/devicetree/bindings/i2c/i2c-lpc2k.txt +F: Documentation/devicetree/bindings/i2c/nxp,lpc1788-i2c.yaml F: arch/arm/boot/dts/nxp/lpc/lpc43* F: drivers/i2c/busses/i2c-lpc2k.c F: drivers/memory/pl172.c
Convert the NXP I2C controller for LPC2xxx/178x/18xx/43xx to newer DT schema. Created DT schema based on the .txt file which had `compatible`, `reg`, `interrupts`, `clocks`, `#address-cells` and `#size-cells` as required properties. Additional changes to the original .txt binding - added maintainer from the MAINTAINERS file. - added resets property required by the corresponding DTS files. Signed-off-by: Kanak Shilledar <kanakshilledar@gmail.com> --- Changes in v2: - updated subject line to include device name. - changed removed description from properties except `clock-frequency`. - updated MAINTAINERS to track this file. --- .../devicetree/bindings/i2c/i2c-lpc2k.txt | 33 ----------- .../bindings/i2c/nxp,lpc1788-i2c.yaml | 56 +++++++++++++++++++ MAINTAINERS | 2 +- 3 files changed, 57 insertions(+), 34 deletions(-) delete mode 100644 Documentation/devicetree/bindings/i2c/i2c-lpc2k.txt create mode 100644 Documentation/devicetree/bindings/i2c/nxp,lpc1788-i2c.yaml