| Message ID | 1481302167-28044-5-git-send-email-clg@kaod.org |
|---|---|
| State | Superseded |
| Headers | show |
On Sat, Dec 10, 2016 at 3:49 AM, Cédric Le Goater <clg@kaod.org> wrote: > Signed-off-by: Cédric Le Goater <clg@kaod.org> > --- > .../devicetree/bindings/mtd/aspeed-smc.txt | 51 ++++++++++++++++++++++ > 1 file changed, 51 insertions(+) > create mode 100644 Documentation/devicetree/bindings/mtd/aspeed-smc.txt > > diff --git a/Documentation/devicetree/bindings/mtd/aspeed-smc.txt b/Documentation/devicetree/bindings/mtd/aspeed-smc.txt > new file mode 100644 > index 000000000000..e2c88cea38f6 > --- /dev/null > +++ b/Documentation/devicetree/bindings/mtd/aspeed-smc.txt > @@ -0,0 +1,51 @@ > +* Aspeed Firmware Memory controller > +* Aspeed SPI Flash Memory Controller > + > +The Firmware Memory Controller in the Aspeed AST2500 SoC supports > +three chip selects, two of which are always of SPI type and the third > +can be SPI or NOR type flash, but the driver only supports SPI. As the bindings are a description of the hardware and not the driver, we might want to reword this. Perhaps "these bindings only describe SPI"? Cheers, Joel > + > +The two SPI flash memory controllers in the AST2500 each support two > +chip selects. > + > +Required properties: > + - compatible : Should be one of > + "aspeed,ast2400-fmc" for the AST2400 Firmware Memory Controller > + "aspeed,ast2400-spi" for the AST2400 SPI Flash memory Controller > + "aspeed,ast2500-fmc" for the AST2500 Firmware Memory Controller > + "aspeed,ast2500-spi" for the AST2500 SPI flash memory controllers > + > + - reg : the first contains the control register location and length, > + the second contains the memory window mapping address and length > + - #address-cells : must be 1 corresponding to chip select child binding > + - #size-cells : must be 0 corresponding to chip select child binding > + > +Optional properties: > + - interrupts : Should contain the interrupt for the dma device if an > + FMC > + > +The child nodes are the SPI flash modules which must have a compatible > +property as specified in bindings/mtd/jedec,spi-nor.txt > + > +Optionally, the child node can contain properties for SPI mode (may be > +ignored): > + - spi-max-frequency - max frequency of spi bus > + > + > +Example: > +fmc: fmc@1e620000 { > + compatible = "aspeed,ast2500-fmc"; > + reg = < 0x1e620000 0x94 > + 0x20000000 0x02000000 >; > + #address-cells = <1>; > + #size-cells = <0>; > + interrupts = <19>; > + flash@0 { > + reg = < 0 >; > + compatible = "jedec,spi-nor"; > + /* spi-max-frequency = <>; */ > + /* m25p,fast-read; */ > + #address-cells = <1>; > + #size-cells = <1>; > + }; > +}; > -- > 2.7.4 >
diff --git a/Documentation/devicetree/bindings/mtd/aspeed-smc.txt b/Documentation/devicetree/bindings/mtd/aspeed-smc.txt new file mode 100644 index 000000000000..e2c88cea38f6 --- /dev/null +++ b/Documentation/devicetree/bindings/mtd/aspeed-smc.txt @@ -0,0 +1,51 @@ +* Aspeed Firmware Memory controller +* Aspeed SPI Flash Memory Controller + +The Firmware Memory Controller in the Aspeed AST2500 SoC supports +three chip selects, two of which are always of SPI type and the third +can be SPI or NOR type flash, but the driver only supports SPI. + +The two SPI flash memory controllers in the AST2500 each support two +chip selects. + +Required properties: + - compatible : Should be one of + "aspeed,ast2400-fmc" for the AST2400 Firmware Memory Controller + "aspeed,ast2400-spi" for the AST2400 SPI Flash memory Controller + "aspeed,ast2500-fmc" for the AST2500 Firmware Memory Controller + "aspeed,ast2500-spi" for the AST2500 SPI flash memory controllers + + - reg : the first contains the control register location and length, + the second contains the memory window mapping address and length + - #address-cells : must be 1 corresponding to chip select child binding + - #size-cells : must be 0 corresponding to chip select child binding + +Optional properties: + - interrupts : Should contain the interrupt for the dma device if an + FMC + +The child nodes are the SPI flash modules which must have a compatible +property as specified in bindings/mtd/jedec,spi-nor.txt + +Optionally, the child node can contain properties for SPI mode (may be +ignored): + - spi-max-frequency - max frequency of spi bus + + +Example: +fmc: fmc@1e620000 { + compatible = "aspeed,ast2500-fmc"; + reg = < 0x1e620000 0x94 + 0x20000000 0x02000000 >; + #address-cells = <1>; + #size-cells = <0>; + interrupts = <19>; + flash@0 { + reg = < 0 >; + compatible = "jedec,spi-nor"; + /* spi-max-frequency = <>; */ + /* m25p,fast-read; */ + #address-cells = <1>; + #size-cells = <1>; + }; +};
Signed-off-by: Cédric Le Goater <clg@kaod.org> --- .../devicetree/bindings/mtd/aspeed-smc.txt | 51 ++++++++++++++++++++++ 1 file changed, 51 insertions(+) create mode 100644 Documentation/devicetree/bindings/mtd/aspeed-smc.txt