| Message ID | 20181203091456.454030-2-tmaimon77@gmail.com |
|---|---|
| State | Changes Requested |
| Headers | show |
| Series | SPI-NOR add NPCM FIU controller driver | expand |
On Mon, Dec 03, 2018 at 11:14:55AM +0200, Tomer Maimon wrote: > Added device tree binding documentation for Nuvoton BMC > NPCM Flash Interface Unit(FIU) SPI-NOR controller. > > Signed-off-by: Tomer Maimon <tmaimon77@gmail.com> > --- > Documentation/devicetree/bindings/mtd/npcm-fiu.txt | 64 ++++++++++++++++++++++ > 1 file changed, 64 insertions(+) > create mode 100644 Documentation/devicetree/bindings/mtd/npcm-fiu.txt > > diff --git a/Documentation/devicetree/bindings/mtd/npcm-fiu.txt b/Documentation/devicetree/bindings/mtd/npcm-fiu.txt > new file mode 100644 > index 000000000000..9746cb5b1ced > --- /dev/null > +++ b/Documentation/devicetree/bindings/mtd/npcm-fiu.txt > @@ -0,0 +1,64 @@ > +* Nuvoton FLASH Interface Unit (FIU) SPI Controller > + > +NPCM FIU supports single, dual and quad communication interface. > + > +The NPCM7XX supports three FIU modules, > +FIU0 and FIUx supports two chip selects, > +FIU3 support four chip select. > + > +Required properties: > + - compatible : "nuvoton,npcm750-fiu" for the NPCM7XX BMC > + - #address-cells : should be 1. > + - #size-cells : should be 0. > + - 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 "control" and "memory" > + - clocks : phandle of F reference clock. > + > +Required properties in case the pins can be muxed: > + - pinctrl-names : a pinctrl state named "default" must be defined. > + - pinctrl-0 : phandle referencing pin configuration of the device. > + > +Optional property: > + - spix-mode: enable spix-mode for an expansion bus to an ASIC or CPLD. Needs a vendor prefix. Unless this is some standard SPI thing (which I've never heard of). > + > +The SPI device must be a child of the FIU node and must have a > +compatible property as specified in bindings/mtd/jedec,spi-nor.txt > + > +Required property: > +- reg: chip select number. > + > +Optional property: > +- spi-rx-bus-width: see ../spi/spi-bus.txt for the description. > + > +Aliases: > +- All the FIU controller nodes should be represented in the aliases node using > + the following format 'fiu{n}' where n is a unique number for the alias. > + In the NPCM7XX BMC: > + fiu0 represent fiu 0 controller > + fiu1 represent fiu 3 controller > + fiu2 represent fiu x controller Please don't make up your own aliases. Use 'spiX' if anything, but really, why do you need aliases in the first place? > + > +Example: > +fiu3: fiu@c00000000 { spi@... > + compatible = "nuvoton,npcm750-fiu"; > + #address-cells = <1>; > + #size-cells = <0>; > + reg = <0xfb000000 0x1000>, <0x80000000 0x10000000>; > + reg-names = "control", "memory"; > + clocks = <&clk NPCM7XX_CLK_AHB>; > + pinctrl-names = "default"; > + pinctrl-0 = <&spi3_pins>; > + spi-nor@0 { > + compatible = "jedec,spi-nor"; > + spi-rx-bus-width = <2>; > + #address-cells = <1>; > + #size-cells = <1>; > + reg = <0>; > + partition@0 { > + label = "flash_data"; > + reg = <0x0 0x800000>; > + }; > + }; > +}; > + > -- > 2.14.1 >
diff --git a/Documentation/devicetree/bindings/mtd/npcm-fiu.txt b/Documentation/devicetree/bindings/mtd/npcm-fiu.txt new file mode 100644 index 000000000000..9746cb5b1ced --- /dev/null +++ b/Documentation/devicetree/bindings/mtd/npcm-fiu.txt @@ -0,0 +1,64 @@ +* Nuvoton FLASH Interface Unit (FIU) SPI Controller + +NPCM FIU supports single, dual and quad communication interface. + +The NPCM7XX supports three FIU modules, +FIU0 and FIUx supports two chip selects, +FIU3 support four chip select. + +Required properties: + - compatible : "nuvoton,npcm750-fiu" for the NPCM7XX BMC + - #address-cells : should be 1. + - #size-cells : should be 0. + - 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 "control" and "memory" + - clocks : phandle of F reference clock. + +Required properties in case the pins can be muxed: + - pinctrl-names : a pinctrl state named "default" must be defined. + - pinctrl-0 : phandle referencing pin configuration of the device. + +Optional property: + - spix-mode: enable spix-mode for an expansion bus to an ASIC or CPLD. + +The SPI device must be a child of the FIU node and must have a +compatible property as specified in bindings/mtd/jedec,spi-nor.txt + +Required property: +- reg: chip select number. + +Optional property: +- spi-rx-bus-width: see ../spi/spi-bus.txt for the description. + +Aliases: +- All the FIU controller nodes should be represented in the aliases node using + the following format 'fiu{n}' where n is a unique number for the alias. + In the NPCM7XX BMC: + fiu0 represent fiu 0 controller + fiu1 represent fiu 3 controller + fiu2 represent fiu x controller + +Example: +fiu3: fiu@c00000000 { + compatible = "nuvoton,npcm750-fiu"; + #address-cells = <1>; + #size-cells = <0>; + reg = <0xfb000000 0x1000>, <0x80000000 0x10000000>; + reg-names = "control", "memory"; + clocks = <&clk NPCM7XX_CLK_AHB>; + pinctrl-names = "default"; + pinctrl-0 = <&spi3_pins>; + spi-nor@0 { + compatible = "jedec,spi-nor"; + spi-rx-bus-width = <2>; + #address-cells = <1>; + #size-cells = <1>; + reg = <0>; + partition@0 { + label = "flash_data"; + reg = <0x0 0x800000>; + }; + }; +}; +
Added device tree binding documentation for Nuvoton BMC NPCM Flash Interface Unit(FIU) SPI-NOR controller. Signed-off-by: Tomer Maimon <tmaimon77@gmail.com> --- Documentation/devicetree/bindings/mtd/npcm-fiu.txt | 64 ++++++++++++++++++++++ 1 file changed, 64 insertions(+) create mode 100644 Documentation/devicetree/bindings/mtd/npcm-fiu.txt