mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 09:35:25 +07:00
a41b51a1f7
Add DT support for PMECC parameters. Signed-off-by: Hong Xu <hong.xu@atmel.com> Signed-off-by: Josh Wu <josh.wu@atmel.com> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
80 lines
2.6 KiB
Plaintext
80 lines
2.6 KiB
Plaintext
Atmel NAND flash
|
|
|
|
Required properties:
|
|
- compatible : "atmel,at91rm9200-nand".
|
|
- reg : should specify localbus address and size used for the chip,
|
|
and hardware ECC controller if available.
|
|
If the hardware ECC is PMECC, it should contain address and size for
|
|
PMECC, PMECC Error Location controller and ROM which has lookup tables.
|
|
- atmel,nand-addr-offset : offset for the address latch.
|
|
- atmel,nand-cmd-offset : offset for the command latch.
|
|
- #address-cells, #size-cells : Must be present if the device has sub-nodes
|
|
representing partitions.
|
|
|
|
- gpios : specifies the gpio pins to control the NAND device. detect is an
|
|
optional gpio and may be set to 0 if not present.
|
|
|
|
Optional properties:
|
|
- nand-ecc-mode : String, operation mode of the NAND ecc mode, soft by default.
|
|
Supported values are: "none", "soft", "hw", "hw_syndrome", "hw_oob_first",
|
|
"soft_bch".
|
|
- atmel,has-pmecc : boolean to enable Programmable Multibit ECC hardware.
|
|
Only supported by at91sam9x5 or later sam9 product.
|
|
- atmel,pmecc-cap : error correct capability for Programmable Multibit ECC
|
|
Controller. Supported values are: 2, 4, 8, 12, 24.
|
|
- atmel,pmecc-sector-size : sector size for ECC computation. Supported values
|
|
are: 512, 1024.
|
|
- atmel,pmecc-lookup-table-offset : includes two offsets of lookup table in ROM
|
|
for different sector size. First one is for sector size 512, the next is for
|
|
sector size 1024.
|
|
- nand-bus-width : 8 or 16 bus width if not present 8
|
|
- nand-on-flash-bbt: boolean to enable on flash bbt option if not present false
|
|
|
|
Examples:
|
|
nand0: nand@40000000,0 {
|
|
compatible = "atmel,at91rm9200-nand";
|
|
#address-cells = <1>;
|
|
#size-cells = <1>;
|
|
reg = <0x40000000 0x10000000
|
|
0xffffe800 0x200
|
|
>;
|
|
atmel,nand-addr-offset = <21>; /* ale */
|
|
atmel,nand-cmd-offset = <22>; /* cle */
|
|
nand-on-flash-bbt;
|
|
nand-ecc-mode = "soft";
|
|
gpios = <&pioC 13 0 /* rdy */
|
|
&pioC 14 0 /* nce */
|
|
0 /* cd */
|
|
>;
|
|
partition@0 {
|
|
...
|
|
};
|
|
};
|
|
|
|
/* for PMECC supported chips */
|
|
nand0: nand@40000000 {
|
|
compatible = "atmel,at91rm9200-nand";
|
|
#address-cells = <1>;
|
|
#size-cells = <1>;
|
|
reg = < 0x40000000 0x10000000 /* bus addr & size */
|
|
0xffffe000 0x00000600 /* PMECC addr & size */
|
|
0xffffe600 0x00000200 /* PMECC ERRLOC addr & size */
|
|
0x00100000 0x00100000 /* ROM addr & size */
|
|
>;
|
|
atmel,nand-addr-offset = <21>; /* ale */
|
|
atmel,nand-cmd-offset = <22>; /* cle */
|
|
nand-on-flash-bbt;
|
|
nand-ecc-mode = "hw";
|
|
atmel,has-pmecc; /* enable PMECC */
|
|
atmel,pmecc-cap = <2>;
|
|
atmel,pmecc-sector-size = <512>;
|
|
atmel,pmecc-lookup-table-offset = <0x8000 0x10000>;
|
|
gpios = <&pioD 5 0 /* rdy */
|
|
&pioD 4 0 /* nce */
|
|
0 /* cd */
|
|
>;
|
|
partition@0 {
|
|
...
|
|
};
|
|
};
|