Re: [PATCHv4] mtd: gpio-nand: add device tree bindings

On 08/09/2011 10:12 AM, Jamie Iles wrote:

+Optional properties:
+- bank-width : Width (in bytes) of the device.  If not present, the width
+  defaults to 8 bits.

"in bytes" versus "defaults to 8 bits"...

+- chip-delay : chip dependent delay for transferring data from array to
+  read registers (tR).  If not present then a default of 0 is used.

nand_set_defaults() will set this to 20 us if you pass in zero.

+- gpio-control-nand,io-sync-reg : A 64-bit physical address for a read
+  location used to guard against bus reordering with regards to accesses to
+  the GPIO's and the NAND flash data bus.  If present, then after changing
+  GPIO state, this register will be read to ensure that the accesses have
+  completed.

The driver does it before and after all cmd_ctrl byte writes, in
addition to after changing the GPIO state.

-Scott