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From: Mark Brown <broonie@kernel.org>
To: masonccyang@mxic.com.tw
Cc: bbrezillon@kernel.org,
	Geert Uytterhoeven <geert+renesas@glider.be>,
	Simon Horman <horms@verge.net.au>,
	juliensu@mxic.com.tw, linux-kernel@vger.kernel.org,
	linux-renesas-soc@vger.kernel.org, linux-spi@vger.kernel.org,
	Marek Vasut <marek.vasut@gmail.com>,
	Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>,
	zhengxunli@mxic.com.tw
Subject: Re: Applied "spi: Add Renesas R-Car Gen3 RPC-IF SPI controller driver" to the spi tree
Date: Wed, 13 Feb 2019 12:16:35 +0000	[thread overview]
Message-ID: <20190213121635.GD7540@sirena.org.uk> (raw)
In-Reply-To: <OF9C8DA179.15D69C0A-ON482583A0.00283EB5-482583A0.002E45C8@mxic.com.tw>

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On Wed, Feb 13, 2019 at 04:25:32PM +0800, masonccyang@mxic.com.tw wrote:

> From current mainline branch, MFD seems support the device which is on 
> the same hardware bus(i.e, I2C, SPI, MMIO and SPMI)for multi-function 
> by Read/Write the common same registers.

That's most MFDs but there are some that do some level of enumeration
(even if it's just looking at the device ID that got registered) to
decide what subdevices get registered, that's what people are suggesting
here I think.

> I am checking and not sure if MMIO of MFD could support RPC-IF for 
> different hardware bus on SPI and CFI.
> I also doubt if this method is a correct solution for RPC-IF works
> either in SPI mode or CFI mode.

For MMIO devices MFD just passes through the parent resources.

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  parent reply	other threads:[~2019-02-13 12:16 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-28  6:49 [PATCH v8 0/2] spi: Add Renesas R-Car Gen3 RPC-IF SPI driver Mason Yang
2019-01-28  6:49 ` [PATCH v8 1/2] spi: Add Renesas R-Car Gen3 RPC-IF SPI controller driver Mason Yang
2019-02-12 14:22   ` Applied "spi: Add Renesas R-Car Gen3 RPC-IF SPI controller driver" to the spi tree Mark Brown
2019-02-12 14:33     ` Marek Vasut
2019-02-12 14:43       ` Mark Brown
2019-02-12 16:49         ` Mark Brown
     [not found]           ` <OF9C8DA179.15D69C0A-ON482583A0.00283EB5-482583A0.002E45C8@mxic.com.tw>
2019-02-13 12:16             ` Mark Brown [this message]
2019-02-13 12:37               ` Marek Vasut
     [not found]                 ` <OF9B3A3A20.C0BF34B8-ON482583A1.002D5F3B-482583A1.00329653@mxic.com.tw>
2019-02-14 10:52                   ` Marek Vasut
2019-03-07 17:50   ` [PATCH v8 1/2] spi: Add Renesas R-Car Gen3 RPC-IF SPI controller driver Sergei Shtylyov
2019-03-08  9:14     ` Geert Uytterhoeven
2019-03-08 17:32       ` Sergei Shtylyov
2019-03-22 17:43   ` Sergei Shtylyov
     [not found]     ` <OF7C1EB3FC.1ABCD2C2-ON482583C8.002D7A69-482583C8.002E899C@mxic.com.tw>
2019-03-25 19:12       ` Sergei Shtylyov
2019-03-26 16:42         ` Sergei Shtylyov
     [not found]           ` <OF5BDFBDAB.B66A1ADE-ON482583CA.0006C5C2-482583CA.0008788E@mxic.com.tw>
2019-03-27 10:20             ` Sergei Shtylyov
2019-01-28  6:49 ` [PATCH v8 2/2] dt-bindings: spi: Document Renesas R-Car Gen3 RPC-IF controller bindings Mason Yang
2019-02-12 14:22   ` Applied "dt-bindings: spi: Document Renesas R-Car Gen3 RPC-IF controller bindings" to the spi tree Mark Brown

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