Messages in this thread | | | Subject | Re: [PATCH v13 3/3] dt-bindings: mfd: Document Renesas R-Car Gen3 RPC-IF controller bindings | From | masonccyang@mxic ... | Date | Wed, 19 Jun 2019 15:36:20 +0800 |
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Hi Marek,
> Subject > > Re: [PATCH v13 3/3] dt-bindings: mfd: Document Renesas R-Car Gen3 RPC-IF
> controller bindings > > On 6/6/19 9:40 AM, masonccyang@mxic.com.tw wrote: > [...] > > > RPC-IF works either in SPI or HyperFlash is decided by external hardware > > pins > > configuration and it can NOT switch it's operation mode in the run time. > > This is not like my understanding of MFD. > > Which external hardware pins decide the RPC configuration ? > > It seems to me like PHYCNT register, PHYMEM bitfield, selects what > device is connected, and then a couple of other bits control the > communication, but I see nothing which would be tied to any external > configuration pins. >
You may refer to R-Car D3 Draak Eva. board hardware manual and start-up guide, i.e., Table 2.12 Pin Multiplexing of R-Car D3 Mode setting pins and set by hardware switch 1, 2, 3, 13, 31 and 10 to configure booting from SPI mode or HyperFlash mode.
thanks & best regards, Mason
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