Re: [PATCH v8 3/5] mtd: nand: vf610_nfc: add device tree bindings
From: Shawn Guo <shawnguo@kernel.org>
Date: 2015-07-28 01:05:33
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On Mon, Jul 27, 2015 at 06:42:43PM +0200, Stefan Agner wrote:
Signed-off-by: Bill Pringlemeir <redacted> Signed-off-by: Stefan Agner <stefan@agner.ch>
Acked-by: Shawn Guo <shawnguo@kernel.org>
quoted hunk ↗ jump to hunk
--- .../devicetree/bindings/mtd/vf610-nfc.txt | 45 ++++++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 Documentation/devicetree/bindings/mtd/vf610-nfc.txtdiff --git a/Documentation/devicetree/bindings/mtd/vf610-nfc.txt b/Documentation/devicetree/bindings/mtd/vf610-nfc.txt new file mode 100644 index 0000000..cae5f25 --- /dev/null +++ b/Documentation/devicetree/bindings/mtd/vf610-nfc.txt@@ -0,0 +1,45 @@ +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 +- nand-bus-width: see nand.txt +- nand-ecc-mode: see nand.txt +- nand-on-flash-bbt: see nand.txt +- 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 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 + +Example: + + nfc: nand@400e0000 { + compatible = "fsl,vf610-nfc"; + #address-cells = <1>; + #size-cells = <1>; + 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-bus-width = <8>; + nand-ecc-mode = "hw"; + nand-ecc-strength = <32>; + nand-ecc-step-size = <2048>; + nand-on-flash-bbt; + };-- 2.4.5 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel