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| author | Jyri Sarha <jsarha@ti.com> | 2017-02-08 16:43:59 +0100 |
|---|---|---|
| committer | Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> | 2017-02-08 16:43:59 +0100 |
| commit | fdde1a8148d81617582c138cd1fbdc4594d4c941 (patch) | |
| tree | 9e76f4eef6b4b0944288897faab4d65525ecae74 /Documentation | |
| parent | 519b4dba586198eed8f72ba07bc71808af2e0e32 (diff) | |
| download | linux-fdde1a8148d81617582c138cd1fbdc4594d4c941.tar.gz linux-fdde1a8148d81617582c138cd1fbdc4594d4c941.tar.xz | |
fbdev: ssd1307fb: Make reset gpio devicetree property optional
Make reset gpio devicetree property optional. Depending on the board
designing there may not be a dedicated gpio for resetting the
display. Without a proper reset there may be some junk in the display
memory at probe time, so in such a case the display memory is cleared
before turning it on. The devicetree binding document is also updated.
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
Cc: Benoît Cousson <bcousson@baylibre.com>
Signed-off-by: Jyri Sarha <jsarha@ti.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/display/ssd1307fb.txt | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/Documentation/devicetree/bindings/display/ssd1307fb.txt b/Documentation/devicetree/bindings/display/ssd1307fb.txt index 4aee67fdf2cf..6617df68d8b8 100644 --- a/Documentation/devicetree/bindings/display/ssd1307fb.txt +++ b/Documentation/devicetree/bindings/display/ssd1307fb.txt @@ -8,14 +8,14 @@ Required properties: 0x3c or 0x3d - pwm: Should contain the pwm to use according to the OF device tree PWM specification [0]. Only required for the ssd1307. - - reset-gpios: Should contain the GPIO used to reset the OLED display. See - Documentation/devicetree/bindings/gpio/gpio.txt for details. - solomon,height: Height in pixel of the screen driven by the controller - solomon,width: Width in pixel of the screen driven by the controller - solomon,page-offset: Offset of pages (band of 8 pixels) that the screen is mapped to. Optional properties: + - reset-gpios: The GPIO used to reset the OLED display, if available. See + Documentation/devicetree/bindings/gpio/gpio.txt for details. - solomon,segment-no-remap: Display needs normal (non-inverted) data column to segment mapping - solomon,com-seq: Display uses sequential COM pin configuration |