[PATCH 1/4] ARM: dts: dra72-evm: Add NAND support

[Nishanth Menon]

On Tue, Oct 21, 2014 at 11:43 AM, Nishanth Menon <nm at ti.com> wrote:
> Roger,
>
> On 10/21/2014 05:41 AM, Roger Quadros wrote:
>> DRA72-evm has a 256MB 16-bit wide NAND chip. Add
>> pinmux and NAND node.
>>
>> The NAND chips 'Chip select' and 'Write protect' can be
>> controlled using DIP Switch SW5. To use NAND,
>> the switch must be configured like so:
>>
>> SW5.1 (NAND_SELn) = ON (LOW)
>> SW5.9 (GPMC_WPN) = OFF (HIGH)
>
> Could we move this description to the dts as a comment? it would be
> little more easier to refer to than figuring it out from git log. I
> recollect trying to figure this out while attempting to test out NAND
> previously, never actually thought to check in git log. just a
> suggestion..

[...]

>> +&gpmc {
>> +     status = "okay";
>> +     pinctrl-names = "default";
>> +     pinctrl-0 = <&nand_default>;
>> +     ranges = <0 0 0 0x01000000>;    /* minimum GPMC partition = 16MB */
>> +     nand at 0,0 {
>> +             /* To use NAND, DIP switch SW5 must be set like so:
>> +              * SW5.1 (NAND_SELn) = ON (LOW)
>> +              * SW5.9 (GPMC_WPN) = OFF (HIGH)
>> +              */

[...]

Uggh.. ignore my comment - I see you already did that.. my bad.. i missed it :(

Quickly trying to test this, I got the following:
"

[    1.840728] omap-gpmc 50000000.gpmc: GPMC revision 6.0
[    1.847290] nand: device found, Manufacturer ID: 0x2c, Chip ID: 0xca
[    1.854003] nand: Micron MT29F2G16ABAEAWP
[    1.858245] nand: 256MiB, SLC, page size: 2048, OOB size: 64
[    1.864227] omap2-nand omap2-nand.0: CONFIG_MTD_NAND_OMAP_BCH not enabled
[    1.871459] omap2-nand: probe of omap2-nand.0 failed with error -22
"

Full log: http://hastebin.com/ozugepemin.md

Does this depend on
http://marc.info/?l=linux-omap&m=141389532511600&w=2 to function? I
assume yes.

as well?

---
Regards,
Nishanth Menon