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Message-ID: <20161219223111.itu77g7wsqtj6cvs@rob-hp-laptop> Date: Mon, 19 Dec 2016 16:31:11 -0600 From: Rob Herring <robh@...nel.org> To: Geoff Lansberry <geoff@...ee.com> Cc: linux-wireless@...r.kernel.org, lauro.venancio@...nbossa.org, aloisio.almeida@...nbossa.org, sameo@...ux.intel.com, mark.rutland@....com, netdev@...r.kernel.org, devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, mgreer@...malcreek.com, justin@...ee.com Subject: Re: [PATCH 1/3] NFC: trf7970a: add device tree option for 27MHz clock On Thu, Dec 15, 2016 at 05:30:42PM -0500, Geoff Lansberry wrote: > From: Geoff Lansberry <geoff@...ee.com> > > --- > .../devicetree/bindings/net/nfc/trf7970a.txt | 3 ++ > drivers/nfc/trf7970a.c | 42 ++++++++++++++++------ > 2 files changed, 34 insertions(+), 11 deletions(-) > > diff --git a/Documentation/devicetree/bindings/net/nfc/trf7970a.txt b/Documentation/devicetree/bindings/net/nfc/trf7970a.txt > index 32b35a0..9dda879 100644 > --- a/Documentation/devicetree/bindings/net/nfc/trf7970a.txt > +++ b/Documentation/devicetree/bindings/net/nfc/trf7970a.txt > @@ -21,6 +21,8 @@ Optional SoC Specific Properties: > - t5t-rmb-extra-byte-quirk: Specify that the trf7970a has the erratum > where an extra byte is returned by Read Multiple Block commands issued > to Type 5 tags. > +- crystal_27mhz: Set to specify that the input frequency to the trf7970a is 27.12MHz > + Can't you use 'clock-frequency = "27000000";'? > > Example (for ARM-based BeagleBone with TRF7970A on SPI1): > > @@ -43,6 +45,7 @@ Example (for ARM-based BeagleBone with TRF7970A on SPI1): > irq-status-read-quirk; > en2-rf-quirk; > t5t-rmb-extra-byte-quirk; > + crystal_27mhz; > status = "okay"; > }; > };
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