From: Geert Uytterhoeven <geert@linux-m68k.org>
To: Mason Yang <masonccyang@mxic.com.tw>
Cc: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>,
Lee Jones <lee.jones@linaro.org>,
Boris Brezillon <bbrezillon@kernel.org>,
Mark Brown <broonie@kernel.org>,
"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
<devicetree@vger.kernel.org>,
Geert Uytterhoeven <geert+renesas@glider.be>,
Simon Horman <horms@verge.net.au>,
juliensu@mxic.com.tw,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Linux-Renesas <linux-renesas-soc@vger.kernel.org>,
linux-spi <linux-spi@vger.kernel.org>,
Marek Vasut <marek.vasut@gmail.com>,
Mark Rutland <mark.rutland@arm.com>,
Rob Herring <robh@kernel.org>,
zhengxunli@mxic.com.tw
Subject: Re: [PATCH v12 3/3] dt-bindings: mfd: Document Renesas R-Car Gen3 RPC-IF MFD bindings
Date: Tue, 14 May 2019 12:07:54 +0200 [thread overview]
Message-ID: <CAMuHMdVyfnO+wTHNrjjvJoqopC_xC0+sxSY+9a=pv-Wf=w6aCQ@mail.gmail.com> (raw)
In-Reply-To: <OFAD9AA573.86373900-ON482583FA.0034781A-482583FA.0035B40C@mxic.com.tw>
Hi Mason,
On Tue, May 14, 2019 at 11:46 AM <masonccyang@mxic.com.tw> wrote:
> > >> There's precedence for such constructs being an MFD: please see
> > >> drivers/mfd/at91-usart.c, which registers a single MFD cell for
> > > second for the direct mapping read mode and
> > > third for the write buffer area.
> > > - reg-names: should contain "regs", "dirmap" and "wbuf"
> > > - clocks: should contain 1 entries for the module's clock
> > > - clock-names: should contain "rpc"
> >
> > I suspect we'd need the RPC/RPCD2 clocks mentioned as well (not sure
> yet)...
>
> Need it ?
> RPCD2 is derived from RPC and it's value is half of RPC,
> i.e., RPC = 160MHz, RPCD2 = 80 MHz
That hierarchy depends on the actual SoC, right?
AFAIU, both are derived from RPCSRC, and can be controlled individually
on some SoCs.
BTW, I still haven't seen a patch for drivers/clk/renesas/r8a77995-cpg-mssr.c
adding RPC-related clocks, so I have no idea what's the Linux view of the
hierarchy on your system.
Thanks!
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
next prev parent reply other threads:[~2019-05-14 10:08 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-24 7:55 [PATCH v12 0/3] mfd: Add Renesas R-Car Gen3 RPC-IF MFD & SPI driver Mason Yang
2019-04-24 7:55 ` [PATCH v12 1/3] mfd: Add Renesas R-Car Gen3 RPC-IF MFD driver Mason Yang
2019-04-24 7:55 ` [PATCH v12 2/3] spi: Add Renesas R-Car Gen3 RPC-IF SPI controller driver Mason Yang
2019-05-14 6:52 ` Lee Jones
2019-05-15 5:55 ` masonccyang
2019-05-15 7:16 ` Lee Jones
2019-04-24 7:55 ` [PATCH v12 3/3] dt-bindings: mfd: Document Renesas R-Car Gen3 RPC-IF MFD bindings Mason Yang
2019-04-24 21:23 ` Rob Herring
2019-04-24 21:54 ` Marek Vasut
2019-04-25 23:07 ` Rob Herring
2019-04-26 1:44 ` Marek Vasut
2019-05-07 12:57 ` Lee Jones
[not found] ` <OF08A5650B.8AE8977C-ON482583F4.000E5B1E-482583F4.000F7215@mxic.com.tw>
2019-05-08 3:52 ` Marek Vasut
2019-05-08 6:11 ` Lee Jones
[not found] ` <OFE86674B9.06D723A0-ON482583F5.000AD50C-482583F5.000BA075@mxic.com.tw>
2019-05-09 19:23 ` Sergei Shtylyov
[not found] ` <OFB19BCE91.6EBBAA77-ON482583F6.000234E2-482583F6.00061290@mxic.com.tw>
2019-05-13 7:11 ` Geert Uytterhoeven
[not found] ` <OFD932ABFC.E3FFCEB8-ON482583F9.003412B1-482583F9.0034D5CA@mxic.com.tw>
2019-05-13 14:43 ` Geert Uytterhoeven
2019-05-14 2:33 ` masonccyang
2019-05-13 19:08 ` Sergei Shtylyov
2019-05-14 9:46 ` masonccyang
2019-05-14 10:07 ` Geert Uytterhoeven [this message]
2019-05-14 20:27 ` Sergei Shtylyov
2019-05-20 7:23 ` masonccyang
2019-05-20 7:44 ` Geert Uytterhoeven
2019-05-21 1:28 ` masonccyang
2019-05-22 16:32 ` Sergei Shtylyov
2019-05-22 17:05 ` Geert Uytterhoeven
2019-05-22 17:23 ` Sergei Shtylyov
2019-05-22 17:44 ` Geert Uytterhoeven
[not found] ` <OFAD9AA573.86373900-ON482583FA.0034781A-482583FA.0035B40C@LocalDomain>
2019-05-14 10:00 ` masonccyang
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