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path: root/drivers/auxdisplay/hd44780.c
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2020-11-04auxdisplay: Move char redefine code to hd44780_commonLars Poeschel1-0/+2
Take the code to redefine characters out of charlcd and move it to hd44780_common, as this is hd44780 specific. There is now a function hd44780_common_redefine_char that drivers use and charlcd calls it through its ops function pointer. Reviewed-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Lars Poeschel <poeschel@lemonage.de> Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2020-11-04auxdisplay: implement various hd44780_common_ functionsLars Poeschel1-0/+14
This implements various hd44780_common_ functions for hd44780 compatible display drivers to use. charlcd then calls these functions through its ops function pointer. The functions namely are: - hd44780_common_shift_cursor - hd44780_common_display_shift - hd44780_common_display - hd44780_common_cursor - hd44780_common_blink - hd44780_common_fontsize - hd44780_common_lines Reviewed-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Lars Poeschel <poeschel@lemonage.de> Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2020-11-04auxdisplay: Move init_display to hd44780_commonLars Poeschel1-0/+2
The init_display function is moved over to hd44780_common. charlcd uses it via its ops function pointer and drivers initialize the ops with the common hd44780_common_init_display function. Reviewed-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Lars Poeschel <poeschel@lemonage.de> Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2020-11-04auxdisplay: Move clear_display to hd44780_commonLars Poeschel1-0/+2
This moves the clear_display function from charlcd to hd44780_common. This is one more step to make charlcd independent from device specific code. The two hd44780 drivers use the new function from hd44780_common and charlcd calls this function through its function pointer in its ops structure. Reviewed-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Lars Poeschel <poeschel@lemonage.de> Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2020-11-04auxdisplay: add home to charlcd_opsLars Poeschel1-0/+2
This adds a home function to the charlcd_ops struct and offer an implementation for hd44780_common. This implementation is used by our two hd44780 drivers. This is to make charlcd device independent. Reviewed-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Lars Poeschel <poeschel@lemonage.de> Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2020-11-04auxdisplay: provide hd44780_common_gotoxyLars Poeschel1-0/+2
Provide a hd44780_common_gotoxy function and a pointer in the ops for charlcd to use to move the cursor. Reviewed-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Lars Poeschel <poeschel@lemonage.de> Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2020-11-04auxdisplay: hd44780_common_printLars Poeschel1-0/+2
We create a hd44780_common_print function. It is derived from the original charlcd_print. charlcd_print becomes a device independent print function, that then only calls via its ops function pointers, into the print function offered by drivers. Reported-by: kernel test robot <lkp@intel.com> Reviewed-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Lars Poeschel <poeschel@lemonage.de> Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2020-11-04auxdisplay: Move write_cmd pointers to hd44780 driversLars Poeschel1-9/+6
The write_cmd function is used to send commands to hd44780 displays. The individual hd44780 drivers then implement their appropriate way of doing this with their supported displays. So we move this pointer so hd44780_common. Reviewed-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Lars Poeschel <poeschel@lemonage.de> Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2020-11-04auxdisplay: Move write_data pointer to hd44780_commonLars Poeschel1-7/+9
This moves the write_data function pointer from struct charlcd_ops to struct hd44780_common. This is the function that actually writes the character to the display. This hd44780 hardware specific function is used by two drivers at the moment. Reviewed-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Lars Poeschel <poeschel@lemonage.de> Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2020-11-04auxdisplay: Move ifwidth to struct hd44780_commonLars Poeschel1-1/+1
Move struct charlcd member ifwidth to our new struct hd44780_common. ifwidth is hd44780 device specific and is used by two drivers at the moment, so we move it to a common place, where both can use this. Reviewed-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Lars Poeschel <poeschel@lemonage.de> Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2020-11-04auxdisplay: Move hwidth and bwidth to struct hd44780_commonLars Poeschel1-9/+15
hwidth is for the hardware buffer size and bwidth is for the buffer width of one single line. This is specific to the hd44780 displays and so it is moved out from charlcd to struct hd44780_common. Reviewed-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Lars Poeschel <poeschel@lemonage.de> Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2020-11-04auxdisplay: Introduce hd44780_common.[ch]Lars Poeschel1-14/+29
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 <w@1wt.eu> Signed-off-by: Lars Poeschel <poeschel@lemonage.de> Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2020-11-04auxdisplay: Use an enum for charlcd backlight on/off opsLars Poeschel1-1/+1
We use an enum for calling the functions in charlcd, that turn the backlight on or off. This enum is generic and can be used for other charlcd turn on / turn off operations as well. Reviewed-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Lars Poeschel <poeschel@lemonage.de> Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2019-08-08auxdisplay: charlcd: move charlcd.h to drivers/auxdisplayMasahiro Yamada1-2/+1
This header is included in drivers/auxdisplay/. Make it a local header. Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
2019-03-17auxdisplay: hd44780: Convert to use charlcd_free()Andy Shevchenko1-2/+2
Convert to use charlcd_free() instead of kfree() for sake of type check. Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
2019-03-17auxdisplay: hd44780: Fix memory leak on ->remove()Andy Shevchenko1-0/+2
We have to free on ->remove() the allocated resources on ->probe(). Fixes: d47d88361fee ("auxdisplay: Add HD44780 Character LCD support") Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
2018-09-13gpiolib: Pass array info to get/set array functionsJanusz Krzysztofik1-4/+4
In order to make use of array info obtained from gpiod_get_array() and speed up processing of arrays matching single GPIO chip layout, that information must be passed to get/set array functions. Extend the functions' API with that additional parameter and update all users. Pass NULL if a user builds an array itself from single GPIOs. Cc: Jonathan Corbet <corbet@lwn.net> Cc: Miguel Ojeda Sandonis <miguel.ojeda.sandonis@gmail.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Sebastien Bourdelin <sebastien.bourdelin@savoirfairelinux.com> Cc: Lukas Wunner <lukas@wunner.de> Cc: Peter Korsgaard <peter.korsgaard@barco.com> Cc: Peter Rosin <peda@axentia.se> Cc: Andrew Lunn <andrew@lunn.ch> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Rojhalat Ibrahim <imr@rtschenk.de> Cc: Dominik Brodowski <linux@dominikbrodowski.net> Cc: Russell King <rmk+kernel@armlinux.org.uk> Cc: Kishon Vijay Abraham I <kishon@ti.com> Cc: Tony Lindgren <tony@atomide.com> Cc: Lars-Peter Clausen <lars@metafoo.de> Cc: Michael Hennerich <Michael.Hennerich@analog.com> Cc: Jonathan Cameron <jic23@kernel.org> Cc: Hartmut Knaack <knaack.h@gmx.de> Cc: Peter Meerwald-Stadler <pmeerw@pmeerw.net> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Jiri Slaby <jslaby@suse.com> Cc: Yegor Yefremov <yegorslists@googlemail.com> Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Janusz Krzysztofik <jmkrzyszt@gmail.com> Acked-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2018-09-13gpiolib: Pass bitmaps, not integer arrays, to get/set arrayJanusz Krzysztofik1-39/+20
Most users of get/set array functions iterate consecutive bits of data, usually a single integer, while processing array of results obtained from, or building an array of values to be passed to those functions. Save time wasted on those iterations by changing the functions' API to accept bitmaps. All current users are updated as well. More benefits from the change are expected as soon as planned support for accepting/passing those bitmaps directly from/to respective GPIO chip callbacks if applicable is implemented. Cc: Jonathan Corbet <corbet@lwn.net> Cc: Miguel Ojeda Sandonis <miguel.ojeda.sandonis@gmail.com> Cc: Sebastien Bourdelin <sebastien.bourdelin@savoirfairelinux.com> Cc: Lukas Wunner <lukas@wunner.de> Cc: Peter Korsgaard <peter.korsgaard@barco.com> Cc: Peter Rosin <peda@axentia.se> Cc: Andrew Lunn <andrew@lunn.ch> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Rojhalat Ibrahim <imr@rtschenk.de> Cc: Dominik Brodowski <linux@dominikbrodowski.net> Cc: Russell King <rmk+kernel@armlinux.org.uk> Cc: Kishon Vijay Abraham I <kishon@ti.com> Cc: Tony Lindgren <tony@atomide.com> Cc: Lars-Peter Clausen <lars@metafoo.de> Cc: Michael Hennerich <Michael.Hennerich@analog.com> Cc: Jonathan Cameron <jic23@kernel.org> Cc: Hartmut Knaack <knaack.h@gmx.de> Cc: Peter Meerwald-Stadler <pmeerw@pmeerw.net> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Jiri Slaby <jslaby@suse.com> Cc: Yegor Yefremov <yegorslists@googlemail.com> Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Janusz Krzysztofik <jmkrzyszt@gmail.com> Acked-by: Ulf Hansson <ulf.hansson@linaro.org> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Tested-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2018-07-07headers: separate linux/mod_devicetable.h from linux/platform_device.hRandy Dunlap1-0/+1
At over 4000 #includes, <linux/platform_device.h> is the 9th most #included header file in the Linux kernel. It does not need <linux/mod_devicetable.h>, so drop that header and explicitly add <linux/mod_devicetable.h> to source files that need it. 4146 #include <linux/platform_device.h> After this patch, there are 225 files that use <linux/mod_devicetable.h>, for a reduction of around 3900 times that <linux/mod_devicetable.h> does not have to be read & parsed. 225 #include <linux/mod_devicetable.h> This patch was build-tested on 20 different arch-es. It also makes these drivers SubmitChecklist#1 compliant. Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Reported-by: kbuild test robot <lkp@intel.com> # drivers/media/platform/vimc/ Reported-by: kbuild test robot <lkp@intel.com> # drivers/pinctrl/pinctrl-u300.c Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-04-12auxdisplay: Replace licenses with SPDX identifiersMiguel Ojeda1-5/+1
Cc: Philippe Ombredanne <pombredanne@nexb.com> Acked-by: Willy Tarreau <w@1wt.eu> Acked-by: Linus Walleij <triad@dflund.se> Acked-by: Robin van der Gracht <robin@protonic.nl> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
2017-04-08auxdisplay: hd44780: Fix DT properties to include units of measurementGeert Uytterhoeven1-2/+3
DT properties specifying physical properties should contain appropriate suffices indicating the units of measurement. Hence amend the HD44780 DT bindings to add "chars" suffixes to the "display-height" and "display-width" properties, and update the driver to parse them. Fixes: dd9502a9e9156dd8 ("dt-bindings: auxdisplay: Add bindings for Hitachi HD44780") Fixes: d47d88361feea2ce ("auxdisplay: Add HD44780 Character LCD support") Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-17auxdisplay: Add HD44780 Character LCD supportGeert Uytterhoeven1-0/+325
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 <geert@linux-m68k.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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