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author | Stefan Agner <stefan@agner.ch> | 2015-09-03 04:06:35 +0300 |
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committer | Brian Norris <computersforpeace@gmail.com> | 2015-09-29 23:54:54 +0300 |
commit | 8a799590005180b1010912be096c1302e2bd06da (patch) | |
tree | e60e6c292ea0f0aed848e7ef6461c41a0c1db153 /Documentation/devicetree/bindings/mtd | |
parent | 049f42509973b86f0015e2c1c38d4c79aea408f5 (diff) | |
download | linux-8a799590005180b1010912be096c1302e2bd06da.tar.xz |
mtd: nand: vf610_nfc: add device tree bindings
Signed-off-by: Bill Pringlemeir <bpringlemeir@nbsps.com>
Acked-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Stefan Agner <stefan@agner.ch>
[Brian: fixup #size-cells in example]
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Diffstat (limited to 'Documentation/devicetree/bindings/mtd')
-rw-r--r-- | Documentation/devicetree/bindings/mtd/vf610-nfc.txt | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/mtd/vf610-nfc.txt b/Documentation/devicetree/bindings/mtd/vf610-nfc.txt new file mode 100644 index 000000000000..c96eeb65f450 --- /dev/null +++ b/Documentation/devicetree/bindings/mtd/vf610-nfc.txt @@ -0,0 +1,59 @@ +Freescale's NAND flash controller (NFC) + +This variant of the Freescale NAND flash controller (NFC) can be found on +Vybrid (vf610), MPC5125, MCF54418 and Kinetis K70. + +Required properties: +- compatible: Should be set to "fsl,vf610-nfc". +- reg: address range of the NFC. +- interrupts: interrupt of the NFC. +- #address-cells: shall be set to 1. Encode the nand CS. +- #size-cells : shall be set to 0. +- assigned-clocks: main clock from the SoC, for Vybrid <&clks VF610_CLK_NFC>; +- assigned-clock-rates: The NAND bus timing is derived from this clock + rate and should not exceed maximum timing for any NAND memory chip + in a board stuffing. Typical NAND memory timings derived from this + clock are found in the SoC hardware reference manual. Furthermore, + there might be restrictions on maximum rates when using hardware ECC. + +- #address-cells, #size-cells : Must be present if the device has sub-nodes + representing partitions. + +Required children nodes: +Children nodes represent the available nand chips. Currently the driver can +only handle one NAND chip. + +Required properties: +- compatible: Should be set to "fsl,vf610-nfc-cs". +- nand-bus-width: see nand.txt +- nand-ecc-mode: see nand.txt + +Required properties for hardware ECC: +- nand-ecc-strength: supported strengths are 24 and 32 bit (see nand.txt) +- nand-ecc-step-size: step size equals page size, currently only 2k pages are + supported +- nand-on-flash-bbt: see nand.txt + +Example: + + nfc: nand@400e0000 { + compatible = "fsl,vf610-nfc"; + #address-cells = <1>; + #size-cells = <0>; + reg = <0x400e0000 0x4000>; + interrupts = <GIC_SPI 83 IRQ_TYPE_LEVEL_HIGH>; + clocks = <&clks VF610_CLK_NFC>; + clock-names = "nfc"; + assigned-clocks = <&clks VF610_CLK_NFC>; + assigned-clock-rates = <33000000>; + + nand@0 { + compatible = "fsl,vf610-nfc-nandcs"; + reg = <0>; + nand-bus-width = <8>; + nand-ecc-mode = "hw"; + nand-ecc-strength = <32>; + nand-ecc-step-size = <2048>; + nand-on-flash-bbt; + }; + }; |