From: Ralf Baechle <ralf@linux-mips.org>
To: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org,
Mauro Carvalho Chehab <mchehab@kernel.org>,
Miguel Ojeda Sandonis <miguel.ojeda.sandonis@gmail.com>,
linux-kernel@vger.kernel.org, Guenter Roeck <linux@roeck-us.net>,
"David S. Miller" <davem@davemloft.net>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Geert Uytterhoeven <geert@linux-m68k.org>,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH v2 17/19] auxdisplay: img-ascii-lcd: driver for simple ASCII LCD displays
Date: Tue, 27 Sep 2016 20:52:37 +0200 [thread overview]
Message-ID: <20160927185237.GG12981@linux-mips.org> (raw)
In-Reply-To: <20160826141751.13121-18-paul.burton@imgtec.com>
On Fri, Aug 26, 2016 at 03:17:49PM +0100, Paul Burton wrote:
> Add a driver for simple ASCII LCD displays found on the MIPS Boston,
> Malta & SEAD3 development boards. The Boston display is an independent
> memory mapped device with a simple memory mapped 8 byte register space
> containing the 8 ASCII characters to display. The Malta display is
> exposed as part of the Malta board registers, and provides 8 registers
> each of which corresponds to one of the ASCII characters to display. The
> SEAD3 display is slightly more complex, exposing an interface to an
> S6A0069 LCD controller via registers provided by the boards CPLD.
> However although the displays differ in their register interface, we
> require similar functionality on each board so abstracting away the
> differences within a single driver allows us to share a significant
> amount of code & ensure consistent behaviour.
>
> The driver displays the Linux kernel version as the default message, but
> allows the message to be changed via a character device. Messages longer
> then the number of characters that the display can show will scroll.
>
> This provides different behaviour to the existing LCD display code for
> the MIPS Malta or MIPS SEAD3 platforms in the following ways:
>
> - The default string to display is not "LINUX ON MALTA" or "LINUX ON
> SEAD3" but "Linux" followed by the version number of the kernel
> (UTS_RELEASE).
>
> - Since that string tends to be significantly longer it scrolls twice
> as fast, moving every 500ms rather than every 1s.
>
> - The LCD won't be updated until the driver is probed, so it doesn't
> provide the early "LINUX" string.
Right now parts 15..18 of this series are stalled due to the lack of an
ack for this patch.
Miguel?
Ralf
next prev parent reply other threads:[~2016-09-27 18:52 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-26 14:17 [PATCH v2 00/19] MIPS: SEAD3 device tree conversion Paul Burton
2016-08-26 14:17 ` [PATCH v2 01/19] MIPS: SEAD3: Split obj-y entries across lines Paul Burton
2016-08-26 14:17 ` [PATCH v2 02/19] MIPS: SEAD3: Probe interrupt controllers using DT Paul Burton
2016-08-26 14:17 ` [PATCH v2 03/19] MIPS: SEAD3: Probe UARTs " Paul Burton
2016-08-26 14:17 ` [PATCH v2 04/19] MIPS: SEAD3: Use generic ns16550a earlycon support Paul Burton
2016-08-26 14:17 ` [PATCH v2 05/19] MIPS: SEAD3: Probe ethernet controller using DT Paul Burton
2016-08-26 14:17 ` [PATCH v2 06/19] MIPS: SEAD3: Probe EHCI " Paul Burton
2016-08-26 14:17 ` [PATCH v2 07/19] usb: host: ehci-sead3: Remove SEAD-3 EHCI code Paul Burton
2016-08-26 15:55 ` Alan Stern
2016-08-26 14:17 ` [PATCH v2 08/19] SEAD3: Probe parallel flash via DT Paul Burton
2016-08-26 14:17 ` [PATCH v2 09/19] MIPS: SEAD3: Use register-bit-led driver via DT for LEDs Paul Burton
2016-08-26 14:17 ` [PATCH v2 10/19] leds: Remove SEAD3 driver Paul Burton
2016-08-29 8:55 ` Jacek Anaszewski
2016-08-30 14:42 ` Paul Burton
2016-08-26 14:17 ` [PATCH v2 11/19] MIPS: SEAD3: Reset via generic syscon-reboot driver & DT Paul Burton
2016-08-26 14:17 ` [PATCH v2 12/19] MIPS: SEAD3: Use generic restart-poweroff driver Paul Burton
2016-08-26 14:17 ` [PATCH v2 13/19] MIPS: SEAD3: Parse memsize in DT shim Paul Burton
2016-08-26 14:17 ` [PATCH v2 14/19] MIPS: SEAD3: Drop use of cobalt fbdev driver Paul Burton
2016-08-26 14:17 ` [PATCH v2 15/19] fbdev: cobalt_lcdfb: Drop SEAD3 support Paul Burton
2016-08-26 14:17 ` [PATCH v2 16/19] dt-bindings: img-ascii-lcd: Document a binding for simple ASCII LCDs Paul Burton
2016-08-31 16:18 ` Rob Herring
2016-08-26 14:17 ` [PATCH v2 17/19] auxdisplay: img-ascii-lcd: driver for simple ASCII LCD displays Paul Burton
2016-09-27 18:52 ` Ralf Baechle [this message]
2016-08-26 14:17 ` [PATCH v2 18/19] MIPS: SEAD3: Use img-ascii-lcd driver Paul Burton
2016-08-26 14:17 ` [PATCH v2 19/19] MIPS: SEAD3: Remove custom read_persistent_clock Paul Burton
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