From: "Gupta, Pekon" <pekon-l0cyMroinI0@public.gmane.org>
To: yuhang wang <wangyuhang2014-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: linux-mtd
<linux-mtd-bounces-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org>,
Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
"linux-mtd-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org"
<linux-mtd-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org>,
"spi-devel-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org"
<spi-devel-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org>,
"Poddar, Sourav" <sourav.poddar-l0cyMroinI0@public.gmane.org>
Subject: RE: support DUAL and QUAD[patch v1]
Date: Tue, 16 Jul 2013 09:11:25 +0000 [thread overview]
Message-ID: <20980858CB6D3A4BAE95CA194937D5E73E9E851E@DBDE04.ent.ti.com> (raw)
In-Reply-To: <CAHSAbzMDOWo5oBqUHqMxybuDwUjFbczYwN+85gH+rxZ9z8u2Pw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
>
> Hi, Gupta
>
>
> > [Pekon]: Instead of adding new fields you can use existing 'mode' field to
> > pass on the platform specific configurations. And if 'u8 mode' does not
> > suffice you can increase it to 'u32'.
> > #define QSPI_MODE 1 << 5; // just check which bit-fields are un-used
> > spi_board_info->mode |= QSPI_MODE;
> >
>
> well, can dual and quad be regarded as a spi mode? if so, your comment
> seems
> to be right.
Yes, Quad and Dual modes should be regarded as extension of SPI protocol.
- They follow the same basic principle of synchronous data transfer. Right ?
- These modes are not adding any extra side-band | In-band signaling or
controls to modify the protocol. They are just increasing the width of
data-channel for better throughput.
with regards, pekon
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WARNING: multiple messages have this Message-ID (diff)
From: "Gupta, Pekon" <pekon@ti.com>
To: yuhang wang <wangyuhang2014@gmail.com>
Cc: linux-mtd <linux-mtd-bounces@lists.infradead.org>,
Grant Likely <grant.likely@secretlab.ca>,
Mark Brown <broonie@kernel.org>,
"linux-mtd@lists.infradead.org" <linux-mtd@lists.infradead.org>,
"spi-devel-general@lists.sourceforge.net"
<spi-devel-general@lists.sourceforge.net>,
"Poddar, Sourav" <sourav.poddar@ti.com>
Subject: RE: support DUAL and QUAD[patch v1]
Date: Tue, 16 Jul 2013 09:11:25 +0000 [thread overview]
Message-ID: <20980858CB6D3A4BAE95CA194937D5E73E9E851E@DBDE04.ent.ti.com> (raw)
In-Reply-To: <CAHSAbzMDOWo5oBqUHqMxybuDwUjFbczYwN+85gH+rxZ9z8u2Pw@mail.gmail.com>
>
> Hi, Gupta
>
>
> > [Pekon]: Instead of adding new fields you can use existing 'mode' field to
> > pass on the platform specific configurations. And if 'u8 mode' does not
> > suffice you can increase it to 'u32'.
> > #define QSPI_MODE 1 << 5; // just check which bit-fields are un-used
> > spi_board_info->mode |= QSPI_MODE;
> >
>
> well, can dual and quad be regarded as a spi mode? if so, your comment
> seems
> to be right.
Yes, Quad and Dual modes should be regarded as extension of SPI protocol.
- They follow the same basic principle of synchronous data transfer. Right ?
- These modes are not adding any extra side-band | In-band signaling or
controls to modify the protocol. They are just increasing the width of
data-channel for better throughput.
with regards, pekon
next prev parent reply other threads:[~2013-07-16 9:11 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-10 8:34 SPI: support DUAL and QUAD[patch v1] yuhang wang
2013-07-10 8:34 ` yuhang wang
[not found] ` <CAHSAbzP0Nc1ahf_ra6yDuMvV998_+EGcUOGDv5ifKaagYf+NOg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2013-07-16 8:08 ` Gupta, Pekon
2013-07-16 8:08 ` Gupta, Pekon
[not found] ` <20980858CB6D3A4BAE95CA194937D5E73E9E84D2-yXqyApvAXouIQmiDNMet8wC/G2K4zDHf@public.gmane.org>
2013-07-16 8:59 ` yuhang wang
2013-07-16 8:59 ` yuhang wang
[not found] ` <CAHSAbzMDOWo5oBqUHqMxybuDwUjFbczYwN+85gH+rxZ9z8u2Pw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2013-07-16 9:11 ` Gupta, Pekon [this message]
2013-07-16 9:11 ` Gupta, Pekon
[not found] ` <20980858CB6D3A4BAE95CA194937D5E73E9E851E-yXqyApvAXouIQmiDNMet8wC/G2K4zDHf@public.gmane.org>
2013-07-16 10:12 ` thomas.langer-th3ZBGNqt+7QT0dZR+AlfA
2013-07-16 10:12 ` thomas.langer
[not found] ` <593AEF6C47F46446852B067021A273D6D93B49E1-6yu8tajIPx7U45ihrnOXy0EOCMrvLtNR@public.gmane.org>
2013-07-16 11:20 ` Gupta, Pekon
2013-07-16 11:20 ` Gupta, Pekon
[not found] ` <20980858CB6D3A4BAE95CA194937D5E73E9E85D0-yXqyApvAXouIQmiDNMet8wC/G2K4zDHf@public.gmane.org>
2013-07-16 11:59 ` yuhang wang
2013-07-16 11:59 ` yuhang wang
2013-07-16 12:18 ` thomas.langer-th3ZBGNqt+7QT0dZR+AlfA
2013-07-16 12:18 ` thomas.langer
2013-07-18 1:58 ` yuhang wang
2013-07-18 1:58 ` yuhang wang
[not found] ` <CAHSAbzP5jqHwCm0qhu=DiNzpP0swqWHsQ0=MnF+EKaSN22E5hg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2013-07-18 2:25 ` Trent Piepho
2013-07-18 2:25 ` Trent Piepho
[not found] ` <CA+7tXihoZZhpoyvxj58c+Zi-Zy631kK5s-kDoSxPKq=ej0qyvA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2013-07-19 2:24 ` yuhang wang
2013-07-19 2:24 ` yuhang wang
2013-07-19 19:34 ` Gupta, Pekon
2013-07-19 19:34 ` Gupta, Pekon
2013-07-22 9:33 ` Mark Brown
2013-07-22 9:33 ` Mark Brown
[not found] ` <20130722093342.GJ9858-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2013-07-22 9:56 ` Gupta, Pekon
2013-07-22 9:56 ` Gupta, Pekon
2013-07-22 10:32 ` Huang Shijie
2013-07-22 10:32 ` Huang Shijie
[not found] ` <51ED0A57.4060105-KZfg59tc24xl57MIdRCFDg@public.gmane.org>
2013-07-22 11:21 ` thomas.langer-th3ZBGNqt+7QT0dZR+AlfA
2013-07-22 11:21 ` thomas.langer
2013-07-22 12:55 ` Gupta, Pekon
2013-07-22 12:55 ` Gupta, Pekon
[not found] ` <20980858CB6D3A4BAE95CA194937D5E73E9ECAFC-yXqyApvAXouIQmiDNMet8wC/G2K4zDHf@public.gmane.org>
2013-07-23 2:24 ` Huang Shijie
2013-07-23 2:24 ` Huang Shijie
[not found] ` <20980858CB6D3A4BAE95CA194937D5E73E9EC9B1-yXqyApvAXouIQmiDNMet8wC/G2K4zDHf@public.gmane.org>
2013-07-27 11:35 ` yuhang wang
2013-07-27 11:35 ` yuhang wang
2013-07-16 9:29 ` Mark Brown
2013-07-16 9:29 ` Mark Brown
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