From: Richard Cochran <richardcochran@gmail•com>
To: "luwei.zhou@freescale•com" <luwei.zhou@freescale•com>
Cc: "davem@davemloft•net" <davem@davemloft•net>,
"netdev@vger•kernel.org" <netdev@vger•kernel.org>,
"shawn.guo@linaro•org" <shawn.guo@linaro•org>,
"bhutchings@solarflare•com" <bhutchings@solarflare•com>,
"Fabio.Estevam@freescale•com" <Fabio.Estevam@freescale•com>,
"fugang.duan@freescale•com" <fugang.duan@freescale•com>,
"Frank.Li@freescale•com" <Frank.Li@freescale•com>,
"stephen@networkplumber•org" <stephen@networkplumber•org>
Subject: Re: [PATCH v2 3/4] ptp: Add PTP_PF_PPS enumeration to ptp_pin_function.
Date: Mon, 29 Sep 2014 15:25:51 +0200 [thread overview]
Message-ID: <20140929132551.GA27428@netboy> (raw)
In-Reply-To: <ee73b9239ea9417e976fdf2c51b2fd60@BY2PR03MB441.namprd03.prod.outlook.com>
On Mon, Sep 29, 2014 at 09:38:44AM +0000, luwei.zhou@freescale•com wrote:
> My understanding is n_pins should be 1 because there is only one PPS output
The field 'n_pins' is the number of *physical* *programmable* pins.
If the PPS signal on your SoC can appear on any of 4 different pins,
then n_pins should be 4.
If the PPS signal on your SoC can only appear on one pin,
then n_pins should be 0 (zero).
Please see:
Documentation/ptp/testptp.c
include/linux/ptp_clock_kernel.h
include/uapi/linux/ptp_clock.h
Thanks,
Richard
next prev parent reply other threads:[~2014-09-29 13:25 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-28 4:20 [PATCH v2 0/4] net: fec: ptp: Add FEC PPS ouput support Luwei Zhou
2014-09-28 4:20 ` [PATCH v2 1/4] net: fec: ptp: Use the 31-bit ptp timer Luwei Zhou
2014-09-28 4:20 ` [PATCH v2 2/4] net: fec: ptp: Use hardware algorithm to adjust PTP counter Luwei Zhou
2014-09-29 2:13 ` fugang.duan
2014-09-28 4:20 ` [PATCH v2 3/4] ptp: Add PTP_PF_PPS enumeration to ptp_pin_function Luwei Zhou
2014-09-29 8:56 ` Richard Cochran
2014-09-29 9:38 ` luwei.zhou
2014-09-29 13:25 ` Richard Cochran [this message]
2014-09-28 4:20 ` [PATCH v2 4/4] net: fec: ptp: Enalbe PPS ouput based on ptp clock Luwei Zhou
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