Re: [PATCH v3 15/22] mtd: rawnand: fsmc: Stop implementing ->select_chip()

[Linus Walleij <linus.walleij@xxxxxxxxxx>]

On Wed, Jan 9, 2019 at 10:52 PM Boris Brezillon <bbrezillon@xxxxxxxxxx> wrote:
> [Me]

> > The manual contains this (the same bit, just another name than
> > in the driver):
> >
> > PBKEN PC-card/NAND-Flash chip-select enable.
> > Enables the corresponding chip-select.
> > If a disabled chip-select is accessed, an HRESP = ERROR is generated
> > on the AHB bus.
> > 0: disabled (default after reset)
> > 1: enabled
>
> It's still not clear what this bit does. Do you have access to the CS
> pin on the board?

Sadly no...

> > > Can you check which phys range is remapped at
> > > 0xcc960000?
> >
> > No idea how to do that but I'll see if I can figure it out...
>
> print the __iomem values returned by devm_ioremap_resource() and find
> the one that matches this address.

Ah of course. This is the first range, host->data_va
"nand_data" I.e. the NAND memory itself.

Yours,
Linus Walleij

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