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* Qualcomm NAND controller
Required properties:
- compatible: must be one of the following:
* "qcom,ipq806x-nand" - for EBI2 NAND controller being used in IPQ806x
SoC and it uses ADM DMA
* "qcom,ipq4019-nand" - for QPIC NAND controller v1.4.0 being used in
IPQ4019 SoC and it uses BAM DMA
* "qcom,ipq8074-nand" - for QPIC NAND controller v1.5.0 being used in
IPQ8074 SoC and it uses BAM DMA
- reg: MMIO address range
- clocks: must contain core clock and always on clock
- clock-names: must contain "core" for the core clock and "aon" for the
always on clock
EBI2 specific properties:
- dmas: DMA specifier, consisting of a phandle to the ADM DMA
controller node and the channel number to be used for
NAND. Refer to dma.txt and qcom_adm.txt for more details
- dma-names: must be "rxtx"
- qcom,cmd-crci: must contain the ADM command type CRCI block instance
number specified for the NAND controller on the given
platform
- qcom,data-crci: must contain the ADM data type CRCI block instance
number specified for the NAND controller on the given
platform
QPIC specific properties:
- dmas: DMA specifier, consisting of a phandle to the BAM DMA
and the channel number to be used for NAND. Refer to
dma.txt, qcom_bam_dma.txt for more details
- dma-names: must contain all 3 channel names : "tx", "rx", "cmd"
- #address-cells: <1> - subnodes give the chip-select number
- #size-cells: <0>
* NAND chip-select
Each controller may contain one or more subnodes to represent enabled
chip-selects which (may) contain NAND flash chips. Their properties are as
follows.
Required properties:
- reg: a single integer representing the chip-select
number (e.g., 0, 1, 2, etc.)
- #address-cells: see partition.txt
- #size-cells: see partition.txt
Optional properties:
- nand-bus-width: see nand-controller.yaml
- nand-ecc-strength: see nand-controller.yaml. If not specified, then ECC strength will
be used according to chip requirement and available
OOB size.
Each nandcs device node may optionally contain a 'partitions' sub-node, which
further contains sub-nodes describing the flash partition mapping. See
partition.txt for more detail.
Example:
nand-controller@1ac00000 {
compatible = "qcom,ipq806x-nand";
reg = <0x1ac00000 0x800>;
clocks = <&gcc EBI2_CLK>,
<&gcc EBI2_AON_CLK>;
clock-names = "core", "aon";
dmas = <&adm_dma 3>;
dma-names = "rxtx";
qcom,cmd-crci = <15>;
qcom,data-crci = <3>;
#address-cells = <1>;
#size-cells = <0>;
nand@0 {
reg = <0>;
nand-ecc-strength = <4>;
nand-bus-width = <8>;
partitions {
compatible = "fixed-partitions";
#address-cells = <1>;
#size-cells = <1>;
partition@0 {
label = "boot-nand";
reg = <0 0x58a0000>;
};
partition@58a0000 {
label = "fs-nand";
reg = <0x58a0000 0x4000000>;
};
};
};
};
nand-controller@79b0000 {
compatible = "qcom,ipq4019-nand";
reg = <0x79b0000 0x1000>;
clocks = <&gcc GCC_QPIC_CLK>,
<&gcc GCC_QPIC_AHB_CLK>;
clock-names = "core", "aon";
dmas = <&qpicbam 0>,
<&qpicbam 1>,
<&qpicbam 2>;
dma-names = "tx", "rx", "cmd";
#address-cells = <1>;
#size-cells = <0>;
nand@0 {
reg = <0>;
nand-ecc-strength = <4>;
nand-bus-width = <8>;
partitions {
compatible = "fixed-partitions";
#address-cells = <1>;
#size-cells = <1>;
partition@0 {
label = "boot-nand";
reg = <0 0x58a0000>;
};
partition@58a0000 {
label = "fs-nand";
reg = <0x58a0000 0x4000000>;
};
};
};
};
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