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path: root/drivers/video/ssd1307fb.c
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* video: ssd1307fb: Remove redundant of_match_ptrSachin Kamat2013-10-091-1/+1
| | | | | | | | | The data structure of_match_ptr() protects is always compiled in. Hence of_match_ptr() is not needed. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
* video: ssd1307fb: Make use of horizontal addressing modeMaxime Ripard2013-05-281-13/+38
| | | | | | | | | | | | | | | | | | By default, the ssd1307 controller uses an addressing mode called page addressing. This mode only increments the column cursor in memory when writing data but will not increments the page cursor when we are at the end of the page. However, the controller supports another addressing mode, called horizontal addressing, that will maintain both the page and column cursors when writing data to the controller. That means that we can just remove the code that increments the current page address and reset the column cursor when reaching the end of the line, allowing to have a lower data overhead, and a simpler driver. Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
* video: ssd1307fb: Speed up the communication with the controllerMaxime Ripard2013-05-281-3/+8
| | | | | | | | | | | | | | The code until now was sending only 1pixel-wide page segment at once, and started a new transfer every time. It has proven very inefficient, because for one byte to display on the screen, we had to actually send 3 bytes over I2C: the address, the type of data that was going to the controller, and then the actual data. This patches changes that by sending a whole page at once, avoiding most of this expensive overhead. Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
* video: ssd1307fb: Rework the communication functionsMaxime Ripard2013-05-281-27/+50
| | | | | | | | | | | To efficiently send a whole page to the display, we need to be able to manipulate more easily the data arrays that has to be sent to the OLED controller. As such, this patch introduces a ssd1307fb_array structure that handles both the small header to be sent over i2c, which contains the type of information sent, and the raw bytes after that. Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
* video: ssd1307fb: Add support for SSD1306 OLED controllerMaxime Ripard2013-05-281-71/+202
| | | | | | | | | The Solomon SSD1306 OLED controller is very similar to the SSD1307, except for the fact that the power is given through an external PWM for the 1307, and while the 1306 can generate its own power without any PWM. Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
* treewide: Fix typo in printksMasanari Iida2013-04-121-2/+2
| | | | | | | | Correct spelling typos in printk and comments. Signed-off-by: Masanari Iida <standby24x7@gmail.com> Acked-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* drivers/video/ssd1307fb.c: fix bit order bug in the byte translation functionMaxime Ripard2013-01-111-2/+2
| | | | | | | | | | | | | | | | | | This was leading to a strange behaviour when using the fbcon driver on top of this one: the letters were in the right order, but each letter had a vertical symmetry. This was because the addressing was right for the byte, but the addressing of each individual bit was inverted. Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Cc: Brian Lilly <brian@crystalfontz.com> Cc: Greg Kroah-Hartman <gregkh@linux-foundation.org> Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de> Cc: Thomas Petazzoni <thomas@free-electrons.com> Cc: Tomi Valkeinen <tomi.valkeinen@ti.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Drivers: video: remove __dev* attributes.Greg Kroah-Hartman2013-01-031-5/+6
| | | | | | | | | | | | | | CONFIG_HOTPLUG is going away as an option. As a result, the __dev* markings need to be removed. This change removes the use of __devinit, __devexit_p, __devinitdata, __devinitconst, and __devexit from these drivers. Based on patches originally written by Bill Pemberton, but redone by me in order to handle some of the coding style issues better, by hand. Cc: Bill Pemberton <wfp5p@virginia.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* drivers/video: add support for the Solomon SSD1307 OLED ControllerMaxime Ripard2012-12-101-0/+396
Add support for the Solomon SSD1307 OLED controller found on the Crystalfontz CFA10036 board. This controller can drive a display with a resolution up to 128x39 and can operate over I2C or SPI. The current driver has only been tested on the CFA-10036, that is using this controller over I2C to driver a 96x16 OLED screen. [akpm@linux-foundation.org: checkpatch fixes] Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Cc: Brian Lilly <brian@crystalfontz.com> Cc: Greg KH <gregkh@linux-foundation.org> Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de> Cc: Thomas Petazzoni <thomas@free-electrons.com> Cc: Tomi Valkeinen <tomi.valkeinen@ti.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
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