From mboxrd@z Thu Jan 1 00:00:00 1970 From: Nicolas Ferre Subject: Re: [PATCH] ARM: at91: dts: sama5d3/sama5d4: reduce NFC command registers memory region Date: Wed, 4 Mar 2015 16:19:18 +0100 Message-ID: <54F72276.8060605@atmel.com> References: <1421305683-8739-1-git-send-email-josh.wu@atmel.com> <20150115094527.3fde882a@bbrezillon> <54B78F73.9000504@atmel.com> <20150115110501.53b4584c@bbrezillon> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: <20150115110501.53b4584c@bbrezillon> Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Boris Brezillon , Josh Wu Cc: linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Rob Herring , Pawel Moll , Mark Rutland , Ian Campbell , Alexandre Belloni , Jean-Christophe Plagniol-Villard List-Id: devicetree@vger.kernel.org Le 15/01/2015 11:05, Boris Brezillon a =C3=A9crit : > Hi Josh, >=20 > On Thu, 15 Jan 2015 17:59:15 +0800 > Josh Wu wrote: >=20 >> Hi=EF=BC=8C Boris >> >> Thanks for the review. >> >> On 1/15/2015 4:45 PM, Boris Brezillon wrote: >>> Hi Josh, >>> >>> On Thu, 15 Jan 2015 15:08:03 +0800 >>> Josh Wu wrote: >>> >>>> To get NFC status, we need to read the NFC command registers, whic= h is a >>>> 256M memory mapping address. To check the status, you just read su= ch >>>> address from NFC command registers. >>>> For example, to check NFCBUSY (bit 27), you need to read 0x0800000= 0 >>>> (bit 27 is set to 1) of the NFC command register. >>>> If you want to check NFCBUSY (bit 27) and NFCWR (bit 26) in same t= ime, >>>> you need to read 0x0c000000 (bit 27 and bit 26 are set to 1). >>> Are NFCBUSY and NFCWR found in NFCDATA_STATUS and those found in HS= MC_SR >>> representing the same thing. >> yes. it is. I just check with IP team. The NFCBUSY of NFCDATA_STATUS= is=20 >> also refer to NFC_BUSY of HSMC_SR. >> >>> If they are, I think you can just use HSMC_SR instead of NFCDATA_ST= ATUS >>> to check the status [1] and drop the last bit in the NFC Command >>> Resgiters range. >> Thank you. your code works (just need some typo change). >> I want to send [1] code with your signed-off and my acked to mtd lis= t. >> Is it okay for you? >=20 > Sure, no problem. Hi Josh, What is the status of this patch set? Bye, --=20 Nicolas Ferre -- To unsubscribe from this list: send the line "unsubscribe devicetree" i= n the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html