Hi,
On 5/11/2020 3:14 pm, Linus Walleij wrote:
On Thu, Oct 29, 2020 at 8:39 AM Ramuthevar,Vadivel MuruganX
<vadivel.muruganx.ramuthevar@xxxxxxxxxxxxxxx> wrote:
From: Ramuthevar Vadivel Murugan <vadivel.muruganx.ramuthevar@xxxxxxxxxxxxxxx>
Convert the cadence-quadspi.txt documentation to cadence-quadspi.yaml
remove the cadence-quadspi.txt from Documentation/devicetree/bindings/spi/
Signed-off-by: Ramuthevar Vadivel Murugan <vadivel.muruganx.ramuthevar@xxxxxxxxxxxxxxx>
+ cdns,is-decoded-cs:
+ type: boolean
+ description:
+ Flag to indicate whether decoder is used or not.
Please elaborate a bit on what kind of decoder this is.
I am curious! :)
Sure, I will elaborate more about decoder for chip select.
QSPI controller has in-built chip select decoder instead of external
decder circuit, it supports multiple chip selection by 2-to-4 decoder,
the below combinations
CS0 - 1110
CS1 - 1101
CS2 - 1011
CS3 - 0111
when in direct access mode, each chip selection has it's own specified
memory region as well.
Regards
Vadivel
Yours,
Linus Walleij
