04 Nov, 2020
2 commits
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This driver allows to use a lcd2s 20x4 character display from Modtronix
engineering as an auxdisplay charlcd device.Signed-off-by: Lars Poeschel
Signed-off-by: Miguel Ojeda -
There is some hd44780 specific code in charlcd and this code is used by
multiple drivers. To make charlcd independent from this device specific
code this has to be moved to a place where the multiple drivers can
share their common code. This common place is now introduced as
hd44780_common.Reviewed-by: Willy Tarreau
Signed-off-by: Lars Poeschel
Signed-off-by: Miguel Ojeda
17 Mar, 2019
1 commit
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The auxdisplay Kconfig is confusing. It creates two separate menus
even though the settings are closely related. Moreover, the options
for setting the boot message depend on CONFIG_PARPORT even though they
are used by drivers that do not.Clear up the confusion by moving the "Parallel port LCD/Keypad" menu
under auxdisplay where it logically belongs. Change the boot message
options to depend only on CONFIG_CHARLCD, making them accessible also
when only the HD44780 is selected.Since the "Parallel port LCD/Keypad" driver now has a new dependency
on CONFIG_AUXDISPLAY, rename its Kconfig symbol and keep the old one
such that make oldconfig will not disable the driver.Signed-off-by: Mans Rullgard
Signed-off-by: Miguel Ojeda
02 Nov, 2017
1 commit
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Many source files in the tree are missing licensing information, which
makes it harder for compliance tools to determine the correct license.By default all files without license information are under the default
license of the kernel, which is GPL version 2.Update the files which contain no license information with the 'GPL-2.0'
SPDX license identifier. The SPDX identifier is a legally binding
shorthand, which can be used instead of the full boiler plate text.This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.How this work was done:
Patches were generated and checked against linux-4.14-rc6 for a subset of
the use cases:
- file had no licensing information it it.
- file was a */uapi/* one with no licensing information in it,
- file was a */uapi/* one with existing licensing information,Further patches will be generated in subsequent months to fix up cases
where non-standard license headers were used, and references to license
had to be inferred by heuristics based on keywords.The analysis to determine which SPDX License Identifier to be applied to
a file was done in a spreadsheet of side by side results from of the
output of two independent scanners (ScanCode & Windriver) producing SPDX
tag:value files created by Philippe Ombredanne. Philippe prepared the
base worksheet, and did an initial spot review of a few 1000 files.The 4.13 kernel was the starting point of the analysis with 60,537 files
assessed. Kate Stewart did a file by file comparison of the scanner
results in the spreadsheet to determine which SPDX license identifier(s)
to be applied to the file. She confirmed any determination that was not
immediately clear with lawyers working with the Linux Foundation.Criteria used to select files for SPDX license identifier tagging was:
- Files considered eligible had to be source code files.
- Make and config files were included as candidates if they contained >5
lines of source
- File already had some variant of a license header in it (even if
Reviewed-by: Philippe Ombredanne
Reviewed-by: Thomas Gleixner
Signed-off-by: Greg Kroah-Hartman
08 Apr, 2017
2 commits
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It looks like arm-charlcd.c belongs to auxdisplay subsystem.
Move it to drivers/auxdisplay folder.
No functional changes intended.Reviewed-by: Linus Walleij
Signed-off-by: Andy Shevchenko
Signed-off-by: Greg Kroah-Hartman -
It looks like panel.c belongs to auxdisplay subsystem.
Move it to drivers/auxdisplay folder.
No functional changes intended.Acked-by: Geert Uytterhoeven
Signed-off-by: Andy Shevchenko
Signed-off-by: Greg Kroah-Hartman
17 Mar, 2017
2 commits
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The Hitachi HD44780 Character LCD Controller is commonly used on
character LCDs that can display one or more lines of text.This driver supports character LCDs connected to GPIOs, using either a
4-bit or 8-bit data bus, and provides access through the charlcd core
and /dev/lcd.Signed-off-by: Geert Uytterhoeven
Signed-off-by: Greg Kroah-Hartman -
Extract the character LCD core from the Parallel port LCD/Keypad Panel
driver in the misc subsystem, and convert it into a subdriver in the
auxdisplay subsystem. This allows the character LCD core to be used by
other drivers later.Compilation is controlled by its own Kconfig symbol CHARLCD, which is to
be selected by its users, but can be enabled manually for
compile-testing.All functions changed their prefix from "lcd_" to "charlcd_", and gained
a "struct charlcd *" parameter to operate on a specific instance.
While the driver API thus is ready to support multiple instances, the
current limitation of a single display (/dev/lcd has a single misc minor
assigned) is retained.No functional changes intended.
Signed-off-by: Geert Uytterhoeven
Signed-off-by: Greg Kroah-Hartman
10 Nov, 2016
1 commit
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Added a driver for the Holtek HT16K33 LED controller with keyscan.
Signed-off-by: Robin van der Gracht
CC: Miguel Ojeda Sandonis
Acked-by: Rob Herring
Reviewed-by: Linus Walleij
Signed-off-by: Greg Kroah-Hartman
06 Oct, 2016
1 commit
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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.Signed-off-by: Paul Burton
Cc: Mauro Carvalho Chehab
Cc: Miguel Ojeda Sandonis
Cc: Guenter Roeck
Cc: David S. Miller
Cc: Greg Kroah-Hartman
Cc: Geert Uytterhoeven
Cc: Andrew Morton
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/14062/
Signed-off-by: Ralf Baechle
12 Feb, 2007
1 commit
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Add support for auxiliary displays, the ks0108 LCD controller, the
cfag12864b LCD and adds a framebuffer device: cfag12864bfb.- Add a "auxdisplay/" folder in "drivers/" for auxiliary display
drivers.- Add support for the ks0108 LCD Controller as a device driver. (uses
parport interface)- Add support for the cfag12864b LCD as a device driver. (uses ks0108
LCD Controller driver)- Add a framebuffer device called cfag12864bfb. (uses cfag12864b LCD
driver)- Add the usual Documentation, includes, Makefiles, Kconfigs,
MAINTAINERS, CREDITS...- Miguel Ojeda will maintain all the stuff above.
[rdunlap@xenotime.net: workqueue fixups]
[akpm@osdl.org: kconfig fix]
Signed-off-by: Miguel Ojeda Sandonis
Cc: Greg KH
Acked-by: Paulo Marques
Cc: "Randy.Dunlap"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
