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Message-ID: <6d722567-a768-c842-6cc6-5517eed77689@kontron.de>
Date: Thu, 8 Nov 2018 08:54:04 +0000
From: Schrempf Frieder <frieder.schrempf@...tron.De>
To: Boris Brezillon <boris.brezillon@...tlin.com>
CC: "linux-mtd@...ts.infradead.org" <linux-mtd@...ts.infradead.org>,
"linux-spi@...r.kernel.org" <linux-spi@...r.kernel.org>,
"dwmw2@...radead.org" <dwmw2@...radead.org>,
"computersforpeace@...il.com" <computersforpeace@...il.com>,
"marek.vasut@...il.com" <marek.vasut@...il.com>,
"richard@....at" <richard@....at>,
"miquel.raynal@...tlin.com" <miquel.raynal@...tlin.com>,
"broonie@...nel.org" <broonie@...nel.org>,
"david.wolfe@....com" <david.wolfe@....com>,
"fabio.estevam@....com" <fabio.estevam@....com>,
"prabhakar.kushwaha@....com" <prabhakar.kushwaha@....com>,
"yogeshnarayan.gaur@....com" <yogeshnarayan.gaur@....com>,
"han.xu@....com" <han.xu@....com>,
"shawnguo@...nel.org" <shawnguo@...nel.org>,
Frieder Schrempf <frieder.schrempf@...eet.de>,
Rob Herring <robh+dt@...nel.org>,
Mark Rutland <mark.rutland@....com>,
"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 02/10] dt-bindings: spi: Move the bindings for the FSL
QSPI driver
On 08.11.18 09:37, Boris Brezillon wrote:
> On Wed, 7 Nov 2018 15:43:19 +0100
> Frieder Schrempf <frieder.schrempf@...tron.de> wrote:
>
>> From: Frieder Schrempf <frieder.schrempf@...eet.de>
>>
>> Move the documentation of the old SPI NOR driver to the place of the new
>> SPI memory interface based driver.
>>
>> Signed-off-by: Frieder Schrempf <frieder.schrempf@...eet.de>
>> ---
>> .../devicetree/bindings/mtd/fsl-quadspi.txt | 65 --------------------
>> .../devicetree/bindings/spi/spi-fsl-qspi.txt | 65 ++++++++++++++++++++
>
> Did you use -M when you generated patches with git format-patch?
> Normally, when you move a file without changing anything, the diff is
> smaller than that.
No, I didn't use -M. I thought the default settings would be ok, but -M
makes this much shorter of course.
>> 2 files changed, 65 insertions(+), 65 deletions(-)
>>
>> diff --git a/Documentation/devicetree/bindings/mtd/fsl-quadspi.txt b/Documentation/devicetree/bindings/mtd/fsl-quadspi.txt
>> deleted file mode 100644
>> index 483e9cf..0000000
>> --- a/Documentation/devicetree/bindings/mtd/fsl-quadspi.txt
>> +++ /dev/null
>> @@ -1,65 +0,0 @@
>> -* Freescale Quad Serial Peripheral Interface(QuadSPI)
>> -
>> -Required properties:
>> - - compatible : Should be "fsl,vf610-qspi", "fsl,imx6sx-qspi",
>> - "fsl,imx7d-qspi", "fsl,imx6ul-qspi",
>> - "fsl,ls1021a-qspi"
>> - or
>> - "fsl,ls2080a-qspi" followed by "fsl,ls1021a-qspi",
>> - "fsl,ls1043a-qspi" followed by "fsl,ls1021a-qspi"
>> - - reg : the first contains the register location and length,
>> - the second contains the memory mapping address and length
>> - - reg-names: Should contain the reg names "QuadSPI" and "QuadSPI-memory"
>> - - interrupts : Should contain the interrupt for the device
>> - - clocks : The clocks needed by the QuadSPI controller
>> - - clock-names : Should contain the name of the clocks: "qspi_en" and "qspi".
>> -
>> -Optional properties:
>> - - fsl,qspi-has-second-chip: The controller has two buses, bus A and bus B.
>> - Each bus can be connected with two NOR flashes.
>> - Most of the time, each bus only has one NOR flash
>> - connected, this is the default case.
>> - But if there are two NOR flashes connected to the
>> - bus, you should enable this property.
>> - (Please check the board's schematic.)
>> - - big-endian : That means the IP register is big endian
>> -
>> -Example:
>> -
>> -qspi0: quadspi@...44000 {
>> - compatible = "fsl,vf610-qspi";
>> - reg = <0x40044000 0x1000>, <0x20000000 0x10000000>;
>> - reg-names = "QuadSPI", "QuadSPI-memory";
>> - interrupts = <0 24 IRQ_TYPE_LEVEL_HIGH>;
>> - clocks = <&clks VF610_CLK_QSPI0_EN>,
>> - <&clks VF610_CLK_QSPI0>;
>> - clock-names = "qspi_en", "qspi";
>> -
>> - flash0: s25fl128s@0 {
>> - ....
>> - };
>> -};
>> -
>> -Example showing the usage of two SPI NOR devices:
>> -
>> -&qspi2 {
>> - pinctrl-names = "default";
>> - pinctrl-0 = <&pinctrl_qspi2>;
>> - status = "okay";
>> -
>> - flash0: n25q256a@0 {
>> - #address-cells = <1>;
>> - #size-cells = <1>;
>> - compatible = "micron,n25q256a", "jedec,spi-nor";
>> - spi-max-frequency = <29000000>;
>> - reg = <0>;
>> - };
>> -
>> - flash1: n25q256a@1 {
>> - #address-cells = <1>;
>> - #size-cells = <1>;
>> - compatible = "micron,n25q256a", "jedec,spi-nor";
>> - spi-max-frequency = <29000000>;
>> - reg = <1>;
>> - };
>> -};
>> diff --git a/Documentation/devicetree/bindings/spi/spi-fsl-qspi.txt b/Documentation/devicetree/bindings/spi/spi-fsl-qspi.txt
>> new file mode 100644
>> index 0000000..483e9cf
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/spi/spi-fsl-qspi.txt
>> @@ -0,0 +1,65 @@
>> +* Freescale Quad Serial Peripheral Interface(QuadSPI)
>> +
>> +Required properties:
>> + - compatible : Should be "fsl,vf610-qspi", "fsl,imx6sx-qspi",
>> + "fsl,imx7d-qspi", "fsl,imx6ul-qspi",
>> + "fsl,ls1021a-qspi"
>> + or
>> + "fsl,ls2080a-qspi" followed by "fsl,ls1021a-qspi",
>> + "fsl,ls1043a-qspi" followed by "fsl,ls1021a-qspi"
>> + - reg : the first contains the register location and length,
>> + the second contains the memory mapping address and length
>> + - reg-names: Should contain the reg names "QuadSPI" and "QuadSPI-memory"
>> + - interrupts : Should contain the interrupt for the device
>> + - clocks : The clocks needed by the QuadSPI controller
>> + - clock-names : Should contain the name of the clocks: "qspi_en" and "qspi".
>> +
>> +Optional properties:
>> + - fsl,qspi-has-second-chip: The controller has two buses, bus A and bus B.
>> + Each bus can be connected with two NOR flashes.
>> + Most of the time, each bus only has one NOR flash
>> + connected, this is the default case.
>> + But if there are two NOR flashes connected to the
>> + bus, you should enable this property.
>> + (Please check the board's schematic.)
>> + - big-endian : That means the IP register is big endian
>> +
>> +Example:
>> +
>> +qspi0: quadspi@...44000 {
>> + compatible = "fsl,vf610-qspi";
>> + reg = <0x40044000 0x1000>, <0x20000000 0x10000000>;
>> + reg-names = "QuadSPI", "QuadSPI-memory";
>> + interrupts = <0 24 IRQ_TYPE_LEVEL_HIGH>;
>> + clocks = <&clks VF610_CLK_QSPI0_EN>,
>> + <&clks VF610_CLK_QSPI0>;
>> + clock-names = "qspi_en", "qspi";
>> +
>> + flash0: s25fl128s@0 {
>> + ....
>> + };
>> +};
>> +
>> +Example showing the usage of two SPI NOR devices:
>> +
>> +&qspi2 {
>> + pinctrl-names = "default";
>> + pinctrl-0 = <&pinctrl_qspi2>;
>> + status = "okay";
>> +
>> + flash0: n25q256a@0 {
>> + #address-cells = <1>;
>> + #size-cells = <1>;
>> + compatible = "micron,n25q256a", "jedec,spi-nor";
>> + spi-max-frequency = <29000000>;
>> + reg = <0>;
>> + };
>> +
>> + flash1: n25q256a@1 {
>> + #address-cells = <1>;
>> + #size-cells = <1>;
>> + compatible = "micron,n25q256a", "jedec,spi-nor";
>> + spi-max-frequency = <29000000>;
>> + reg = <1>;
>> + };
>> +};
>
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