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Date: Mon, 2 Nov 2020 13:59:41 +0800 From: "Ramuthevar, Vadivel MuruganX" <vadivel.muruganx.ramuthevar@...ux.intel.com> To: Rob Herring <robh@...nel.org> Cc: broonie@...nel.org, vigneshr@...com, tudor.ambarus@...rochip.com, linux-kernel@...r.kernel.org, linux-spi@...r.kernel.org, devicetree@...r.kernel.org, miquel.raynal@...tlin.com, simon.k.r.goldschmidt@...il.com, dinguyen@...nel.org, richard@....at, cheol.yong.kim@...el.com, qi-ming.wu@...el.com Subject: Re: [PATCH v6 5/6] dt-bindings: spi: Convert cadence-quadspi.txt to cadence-quadspi.yaml Hi Rob, Thank you for the review comments... On 30/10/2020 11:18 pm, Rob Herring wrote: > On Fri, Oct 30, 2020 at 01:31:52PM +0800, Ramuthevar,Vadivel MuruganX wrote: >> From: Ramuthevar Vadivel Murugan <vadivel.muruganx.ramuthevar@...ux.intel.com> >> >> Convert the cadence-quadspi.txt documentation to cadence-quadspi.yaml >> remove the cadence-quadspi.txt from Documentation/devicetree/bindings/spi/ >> >> Signed-off-by: Ramuthevar Vadivel Murugan <vadivel.muruganx.ramuthevar@...ux.intel.com> >> --- >> .../devicetree/bindings/spi/cadence-quadspi.txt | 67 --------- >> .../devicetree/bindings/spi/cadence-quadspi.yaml | 149 +++++++++++++++++++++ >> 2 files changed, 149 insertions(+), 67 deletions(-) >> delete mode 100644 Documentation/devicetree/bindings/spi/cadence-quadspi.txt >> create mode 100644 Documentation/devicetree/bindings/spi/cadence-quadspi.yaml >> >> diff --git a/Documentation/devicetree/bindings/spi/cadence-quadspi.txt b/Documentation/devicetree/bindings/spi/cadence-quadspi.txt >> deleted file mode 100644 >> index 945be7d5b236..000000000000 >> --- a/Documentation/devicetree/bindings/spi/cadence-quadspi.txt >> +++ /dev/null >> @@ -1,67 +0,0 @@ >> -* Cadence Quad SPI controller >> - >> -Required properties: >> -- compatible : should be one of the following: >> - Generic default - "cdns,qspi-nor". >> - For TI 66AK2G SoC - "ti,k2g-qspi", "cdns,qspi-nor". >> - For TI AM654 SoC - "ti,am654-ospi", "cdns,qspi-nor". >> -- reg : Contains two entries, each of which is a tuple consisting of a >> - physical address and length. The first entry is the address and >> - length of the controller register set. The second entry is the >> - address and length of the QSPI Controller data area. >> -- interrupts : Unit interrupt specifier for the controller interrupt. >> -- clocks : phandle to the Quad SPI clock. >> -- cdns,fifo-depth : Size of the data FIFO in words. >> -- cdns,fifo-width : Bus width of the data FIFO in bytes. >> -- cdns,trigger-address : 32-bit indirect AHB trigger address. >> - >> -Optional properties: >> -- cdns,is-decoded-cs : Flag to indicate whether decoder is used or not. >> -- cdns,rclk-en : Flag to indicate that QSPI return clock is used to latch >> - the read data rather than the QSPI clock. Make sure that QSPI return >> - clock is populated on the board before using this property. >> - >> -Optional subnodes: >> -Subnodes of the Cadence Quad SPI controller are spi slave nodes with additional >> -custom properties: >> -- cdns,read-delay : Delay for read capture logic, in clock cycles >> -- cdns,tshsl-ns : Delay in nanoseconds for the length that the master >> - mode chip select outputs are de-asserted between >> - transactions. >> -- cdns,tsd2d-ns : Delay in nanoseconds between one chip select being >> - de-activated and the activation of another. >> -- cdns,tchsh-ns : Delay in nanoseconds between last bit of current >> - transaction and deasserting the device chip select >> - (qspi_n_ss_out). >> -- cdns,tslch-ns : Delay in nanoseconds between setting qspi_n_ss_out low >> - and first bit transfer. >> -- resets : Must contain an entry for each entry in reset-names. >> - See ../reset/reset.txt for details. >> -- reset-names : Must include either "qspi" and/or "qspi-ocp". >> - >> -Example: >> - >> - qspi: spi@...05000 { >> - compatible = "cdns,qspi-nor"; >> - #address-cells = <1>; >> - #size-cells = <0>; >> - reg = <0xff705000 0x1000>, >> - <0xffa00000 0x1000>; >> - interrupts = <0 151 4>; >> - clocks = <&qspi_clk>; >> - cdns,is-decoded-cs; >> - cdns,fifo-depth = <128>; >> - cdns,fifo-width = <4>; >> - cdns,trigger-address = <0x00000000>; >> - resets = <&rst QSPI_RESET>, <&rst QSPI_OCP_RESET>; >> - reset-names = "qspi", "qspi-ocp"; >> - >> - flash0: n25q00@0 { >> - ... >> - cdns,read-delay = <4>; >> - cdns,tshsl-ns = <50>; >> - cdns,tsd2d-ns = <50>; >> - cdns,tchsh-ns = <4>; >> - cdns,tslch-ns = <4>; >> - }; >> - }; >> diff --git a/Documentation/devicetree/bindings/spi/cadence-quadspi.yaml b/Documentation/devicetree/bindings/spi/cadence-quadspi.yaml >> new file mode 100644 >> index 000000000000..ec22b040d804 >> --- /dev/null >> +++ b/Documentation/devicetree/bindings/spi/cadence-quadspi.yaml >> @@ -0,0 +1,149 @@ >> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) >> +%YAML 1.2 >> +--- >> +$id: http://devicetree.org/schemas/spi/cadence-quadspi.yaml# >> +$schema: http://devicetree.org/meta-schemas/core.yaml# >> + >> +title: Cadence Quad SPI controller >> + >> +maintainers: >> + - Vadivel Murugan <vadivel.muruganx.ramuthevar@...el.com> >> + >> +allOf: >> + - $ref: "spi-controller.yaml#" >> + >> +properties: >> + compatible: >> + oneOf: >> + - items: > > You don't need 'oneOf' if there is only one entry... > > So you've dropped 'cdns,qspi-nor' alone being valid. Granted, the txt > file was fuzzy as to whether or not that was valid. So you have to look > at all the dts files and see. I prefer we don't allow that and require a > more specific compatible, but if there's a bunch then we should allow > for it. The commit message should summarize what you decide. we need bunch of compatibles as below, TI, Altera and Intel uses different compatible's so we added 'oneOf'. cdns,qspi-nor can be dropped instead I can add cadence,qspi ,because this driver suuports qspi-nor and qspi-nand as well. Sure, let me go through other documentation files for reference. > >> + - enum: >> + - ti,k2g-qspi >> + - ti,am654-ospi >> + - const: cdns,qspi-nor > >> +examples: >> + - | >> + qspi: spi@...05000 { >> + compatible = "cadence,qspi","cdns,qpsi-nor"; > > And you missed fixing this. Yes, fixed by "cadence,qspi" keeping alone, need to remove cdns,qspi-nor, thanks! Regards Vadivel > >> + #address-cells = <1>; >> + #size-cells = <0>; >> + reg = <0xff705000 0x1000>, >> + <0xffa00000 0x1000>; >> + interrupts = <0 151 4>; >> + clocks = <&qspi_clk>; >> + cdns,fifo-depth = <128>; >> + cdns,fifo-width = <4>; >> + cdns,trigger-address = <0x00000000>; >> + resets = <&rst 0x1>, <&rst 0x2>; >> + reset-names = "qspi", "qspi-ocp"; >> + >> + flash@0 { >> + compatible = "jedec,spi-nor"; >> + reg = <0x0>; >> + cdns,read-delay = <4>; >> + cdns,tshsl-ns = <50>; >> + cdns,tsd2d-ns = <50>; >> + cdns,tchsh-ns = <4>; >> + cdns,tslch-ns = <4>; >> + }; >> + >> + }; >> + >> +... >> -- >> 2.11.0 >>
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