On Sun, Apr 26, 2020 at 06:02:44PM +0800, Yifeng Zhao wrote: > Documentation support for Rockchip RK3xxx NAND flash controllers > > Signed-off-by: Yifeng Zhao <yifeng.zhao@xxxxxxxxxxxxxx> > --- > > Changes in v5: > - Fix some wrong define > - Add boot-medium define > - Remove some compatible define > > Changes in v4: > - The compatible define with rkxx_nfc > - Add assigned-clocks > - Fix some wrong define > > Changes in v3: > - Change the title for the dt-bindings > > Changes in v2: None > > .../mtd/rockchip,nand-controller.yaml | 124 ++++++++++++++++++ > 1 file changed, 124 insertions(+) > create mode 100644 Documentation/devicetree/bindings/mtd/rockchip,nand-controller.yaml > > diff --git a/Documentation/devicetree/bindings/mtd/rockchip,nand-controller.yaml b/Documentation/devicetree/bindings/mtd/rockchip,nand-controller.yaml > new file mode 100644 > index 000000000000..12354c79d275 > --- /dev/null > +++ b/Documentation/devicetree/bindings/mtd/rockchip,nand-controller.yaml > @@ -0,0 +1,124 @@ > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/mtd/rockchip,nand-controller.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Rockchip SoCs NAND FLASH Controller (NFC) > + > +allOf: > + - $ref: "nand-controller.yaml#" > + > +maintainers: > + - Heiko Stuebner <heiko@xxxxxxxxx> > + > +properties: > + compatible: > + enum: > + - rockchip,px30_nfc > + - rockchip,rk3xxx_nfc > + - rockchip,rk3308_nfc > + - rockchip,rv1108_nfc Use '-', not '_'. > + > + reg: > + minItems: 1 > + > + interrupts: > + minItems: 1 > + > + clocks: > + minItems: 1 > + items: > + - description: Bus Clock > + - description: Module Clock > + > + clock-names: > + minItems: 1 So 'ahb' is required and 'nfc' is optional? That's what you defined, but that seems backwards. > + items: > + - const: ahb > + - const: nfc > + > +patternProperties: > + "^nand@[0-3]$": > + type: object > + properties: > + reg: > + minimum: 0 > + maximum: 3 > + > + nand-ecc-mode: > + const: hw > + > + nand-ecc-step-size: > + const: 1024 > + > + nand-ecc-strength: > + enum: [16,24,40,60,70] > + > + nand-bus-width: > + const: 8 > + > + nand-is-boot-medium: true > + > + rockchip-boot-blks: rockchip,boot-blks > + minimum: 2 > + default: 16 > + allOf: > + - $ref: /schemas/types.yaml#/definitions/uint32 > + description: > + For legacy devices where the bootrom can only handle 16/24 bit > + BCH/ECC, and for some other devices where the bootrom can support > + 60/70 bit BCH/ECC. > + In addition, when programming the loader, a linked list needs to > + be written in oob for Bootrom to read the correct data sequence. > + If specified it indicates the number of erase blocks in use by > + the bootloader that need a different BCH/ECC setting. > + Only used in combination with 'nand-is-boot-medium'. > + > + rockchip-boot-ecc-strength: rockchip,boot-ecc-strength > + enum: [16,24,40,60,70] > + description: > + If specified it indicates that use a different BCH/ECC setting for > + bootrom. > + Only used in combination with 'nand-is-boot-medium'. > + > +required: > + - compatible > + - reg > + - interrupts > + - clocks > + - clock-names > + > +examples: > + - | > + #include <dt-bindings/clock/rk3308-cru.h> > + #include <dt-bindings/interrupt-controller/arm-gic.h> > + nfc: nand-controller@ff4b0000 { > + compatible = "rockchip,rk3308_nfc"; > + reg = <0x0 0xff4b0000 0x0 0x4000>; > + interrupts = <GIC_SPI 81 IRQ_TYPE_LEVEL_HIGH>; > + clocks = <&cru HCLK_NANDC>, <&cru SCLK_NANDC>; > + clock-names = "ahb", "nfc"; > + assigned-clocks = <&clks SCLK_NANDC>; > + assigned-clock-rates = <150000000>; > + > + pinctrl-0 = <&flash_ale &flash_bus8 &flash_cle &flash_csn0 > + &flash_rdn &flash_rdy &flash_wrn>; > + pinctrl-names = "default"; > + > + #address-cells = <1>; > + #size-cells = <0>; > + > + nand@0 { > + reg = <0>; > + nand-bus-width = <8>; > + nand-ecc-mode = "hw"; > + nand-ecc-strength = <16>; > + nand-ecc-step-size = <1024>; > + nand-is-boot-medium; > + rockchip-boot-blks = <8>; > + rockchip-boot-ecc-strength = <16>; > + }; > + }; > + > +... > -- > 2.17.1 > > >
