[PATCH 1/5] mtd: ofpart: grab device tree node directly from master device node

Robert Jarzmik robert.jarzmik at free.fr
Wed Oct 28 23:32:33 PDT 2015


Marek Vasut <marex at denx.de> writes:

>> Isn't there the case of a single NAND controller with 2 identical chips,
>> each a 8 bit NAND chip, and the controller aggregating them to offer the
>> OS a single 16-bit NAND chip ?
>
> Is that using 1 or 2 physical chipselect lines on the CPU (controller) ?
I think it's 2 physical chipselects (CS0 and CS1). The way I understand it is
that the NAND controller asserts them both, issues the command on the command
line (shared between the 2 chips), and reads/writes on the separate data lines.

Cheers.

-- 
Robert



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