From: Bryan Wu <bryan.wu-OyLXuOCK7orQT0dZR+AlfA@public.gmane.org>
To: David Brownell <david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org>,
Cameron Barfield
<cbarfield-uxMF5PKaPIoXhy9q4Lf3Ug@public.gmane.org>
Cc: Bryan Wu <bryan.wu-OyLXuOCK7orQT0dZR+AlfA@public.gmane.org>,
spi-devel-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [PATCH 13/14] Blackfin SPI driver: Move cs_chg_udelay to cs_deactive to fix bug when some SPI LCD driver needs delay after cs_deactive
Date: Wed, 31 Oct 2007 14:30:04 +0800 [thread overview]
Message-ID: <1193812204.6971.14.camel@roc-laptop> (raw)
In-Reply-To: <200710301319.00071.david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org>
On Tue, 2007-10-30 at 13:18 -0700, David Brownell wrote:
> On Tuesday 30 October 2007, Bryan Wu wrote:
> > @@ -211,6 +211,10 @@ static void cs_deactive(struct driver_data *drv_data, struct chip_data *chip)
> > flag |= (chip->flag << 8);
> >
> > write_FLAG(drv_data, flag);
> > +
> > + /* Move delay here for consistency */
> > + if (chip->cs_chg_udelay)
> > + udelay(chip->cs_chg_udelay);
> > }
> >
>
> By the way, if this is something needed very often, that mechanism
> should be moved into the SPI framework. It wouldn't be polite if
> such LCD drivers could only work on Blackfin boards. :)
I am not sure whether this LCD needs cs_chg_udelay on other boards.
It is found by Cameron Barfield. Maybe it is some timing requirement for
specific hardware.
-Bryan Wu
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next prev parent reply other threads:[~2007-10-31 6:30 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-30 9:17 [PATCH 00/14] Blackfin on-chip SPI controller driver updates and bug-fixing Bryan Wu
[not found] ` <1193735885-8202-1-git-send-email-bryan.wu-OyLXuOCK7orQT0dZR+AlfA@public.gmane.org>
2007-10-30 9:17 ` [PATCH 01/14] Blackfin SPI driver: Initial supporting BF54x in SPI driver Bryan Wu
2007-10-30 9:17 ` [PATCH 02/14] Blackfin SPI driver: use new GPIO API and add error handling Bryan Wu
2007-10-30 9:17 ` [PATCH 03/14] Blackfin SPI driver: add error handing Bryan Wu
2007-10-30 9:17 ` [PATCH 04/14] Blackfin SPI driver: Blackfin SPI driver does not respect the per-transfer cs_change field Bryan Wu
2007-10-30 9:17 ` [PATCH 05/14] Blackfin SPI driver: prevent people from setting bits in ctl_reg Bryan Wu
2007-10-30 9:17 ` [PATCH 06/14] Blackfin SPI driver: update spi driver to support multi-ports Bryan Wu
2007-10-30 9:17 ` [PATCH 07/14] Blackfin SPI driver: Add SPI master controller platform device 1 Bryan Wu
2007-10-30 19:08 ` David Brownell
[not found] ` <200710301208.13367.david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org>
2007-10-31 4:18 ` Bryan Wu
2007-10-30 9:17 ` [PATCH 08/14] Blackfin SPI driver: Move GPIO config to setup and cleanup Bryan Wu
2007-10-30 9:18 ` [PATCH 09/14] Blackfin SPI driver: Fix SPI driver to work with SPI flash ST25P16 on bf548 Bryan Wu
2007-10-30 20:05 ` David Brownell
2007-10-31 6:50 ` Bryan Wu
2007-10-31 7:11 ` David Brownell
[not found] ` <200710310011.33545.david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org>
2007-10-31 7:35 ` Bryan Wu
2007-10-31 8:02 ` David Brownell
[not found] ` <200710310102.36542.david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org>
2007-10-31 8:52 ` Bryan Wu
2007-10-31 8:33 ` Mike Frysinger
[not found] ` <8bd0f97a0710310133m7b5cbbf3j545a489c401185df-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2007-10-31 19:01 ` David Brownell
[not found] ` <200710311201.29643.david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org>
2007-10-31 19:16 ` Mike Frysinger
[not found] ` <8bd0f97a0710311216l25f89b37v356fd44d7c1999da-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2007-10-31 20:14 ` David Brownell
2007-10-30 9:18 ` [PATCH 10/14] Blackfin SPI driver: Clean up useless wait in bfin SPI driver Bryan Wu
2007-10-30 9:18 ` [PATCH 11/14] Blackfin SPI driver: Move global SPI regs_base and dma_ch to struct driver_data Bryan Wu
2007-10-30 9:18 ` [PATCH 12/14] Blackfin SPI driver: Fix bug in u16_cs_chg_reader to read data_len-2 bytes data firstly, then read out the last 2 bytes data Bryan Wu
2007-10-30 9:18 ` [PATCH 13/14] Blackfin SPI driver: Move cs_chg_udelay to cs_deactive to fix bug when some SPI LCD driver needs delay after cs_deactive Bryan Wu
[not found] ` <1193735885-8202-14-git-send-email-bryan.wu-OyLXuOCK7orQT0dZR+AlfA@public.gmane.org>
2007-10-30 20:18 ` David Brownell
[not found] ` <200710301319.00071.david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org>
2007-10-31 6:30 ` Bryan Wu [this message]
2007-10-31 19:04 ` Cameron Barfield
2007-10-30 9:18 ` [PATCH 14/14] Blackfin SPI driver: set correct baud for spi mmc and enable SPI after DMA Bryan Wu
2007-10-30 20:24 ` [PATCH 00/14] Blackfin on-chip SPI controller driver updates and bug-fixing David Brownell
[not found] ` <200710301324.07691.david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org>
2007-10-30 20:29 ` Mike Frysinger
[not found] ` <8bd0f97a0710301329i8a21b22ncc9f71a81bc06543-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2007-10-30 20:42 ` David Brownell
[not found] ` <200710301342.18559.david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org>
2007-10-30 20:54 ` David Brownell
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