Re: [PATCH 1/3] doc: dt: add documentation for Mediatek spi-nor controller

bayi.cheng
2015-09-15T06:49:35Z

On Tue, 2015-09-08 at 17:04 +0530, Jagan Teki wrote:
> On 8 September 2015 at 15:19, Bayi Cheng <bayi.cheng@mediatek.com> wrote:
> > Add device tree binding documentation for serial flash with
> > Mediatek serial flash controller
> >
> > Signed-off-by: Bayi Cheng <bayi.cheng@mediatek.com>
> > ---
> > Documentation/devicetree/bindings/mtd/mtk_nor.txt | 25 +++++++++++++++++++++++
> > 1 file changed, 25 insertions(+)
> > create mode 100644 Documentation/devicetree/bindings/mtd/mtk_nor.txt
> >
> > diff --git a/Documentation/devicetree/bindings/mtd/mtk_nor.txt b/Documentation/devicetree/bindings/mtd/mtk_nor.txt
> > new file mode 100644
> > index 0000000..0eca0cd
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/mtd/mtk_nor.txt
>
> IMHO - looks like the name of the driver file not resembles controller
> driver, usually spi-nor framework has a name include 'nor' and related
> controller drivers uses simple notion with vendor/soc_name-quadspi or
> something similar.
>
> cadence-quadspi.c
> fsl-quadspi.c
>
> Simple suggestion - mtk-quadspi.c (since it supports quad)

Ok, Thanks for your instruct! I will change the name of the driver file
from mtk_nor.c to mtk-quadspi.c . at the same time, change the
mtk_nor.txt to mtk-quadspi.txt .
>
> > @@ -0,0 +1,25 @@
> > +* MTD SPI nor driver for MTK MT81xx (and similar) serial flash controller
> > +
> > +MTK MT81xx serial flash controller is designed for serial Flash device.
> > +It supports one Flash device with signal mode, dual mode and quad mode.
> > +
> > +Required properties:
> > +- compatible: should be "mediatek,mt8173-nor";
> > +- reg: physical base address and length of the controller's register
> > +- clocks: spi nor source clock
> > +- clock-names: "spi_clk", "axi_clk", "mux_clk", "sf_clk"
> > +
> > +See Documentation/devicetree/bindings/clock/clock-bindings.txt
>
> As this related to clock-names, just add this line in-continuous with
> clock-name property description.
>
OK, I will change it.
> > +and Documentation/mtd/spi-nor.txt for details.
>
> This explicit mentioning about spi-nor documentation is may not
> required as this .txt will describe how spi-nor works and not related
> to bindings.
>
yes, you are right, and I will drop this line
> > +
> > +Example:
> > +nor_flash: nor@1100d000 {
> > + compatible = "mediatek,mt8173-nor";
> > + reg = <0 0x1100d000 0 0xe0>;
> > + clocks = <&pericfg CLK_PERI_SPI>,
> > + <&topckgen CLK_TOP_AXI_SEL>,
> > + <&topckgen CLK_TOP_UNIVPLL2_D8>,
> > + <&topckgen CLK_TOP_SPINFI_IFR_SEL>;
> > + clock-names = "spi_clk", "axi_clk", "mux_clk", "sf_clk";
> > +};
> > +
> > --
> > 1.8.1.1.dirty
> >
>
> thanks!