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| author | Javier Martinez Canillas <javierm@redhat.com> | 2022-04-19 23:48:23 +0200 |
|---|---|---|
| committer | Javier Martinez Canillas <javierm@redhat.com> | 2022-04-20 18:48:17 +0200 |
| commit | 74373977d2ca26e5735377f8874be70bc2f030f5 (patch) | |
| tree | 5d9e0e3cc82cd704b788804c99e13d8f7670611c /drivers/gpu/drm/solomon/Makefile | |
| parent | 4203e88ba80bbcdfaa7689db286d07cf4f2993d0 (diff) | |
| download | linux-74373977d2ca26e5735377f8874be70bc2f030f5.tar.bz2 | |
drm/solomon: Add SSD130x OLED displays SPI support
The ssd130x driver only provides the core support for these devices but it
does not have any bus transport logic. Add a driver to interface over SPI.
There is a difference in the communication protocol when using 4-wire SPI
instead of I2C. For the latter, a control byte that contains a D/C# field
has to be sent. This field tells the controller whether the data has to be
written to the command register or to the graphics display data memory.
But for 4-wire SPI that control byte is not used, instead a real D/C# line
must be pulled HIGH for commands data and LOW for graphics display data.
For this reason the standard SPI regmap can't be used and a custom .write
bus handler is needed.
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Acked-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patchwork.freedesktop.org/patch/msgid/20220419214824.335075-6-javierm@redhat.com
Diffstat (limited to 'drivers/gpu/drm/solomon/Makefile')
| -rw-r--r-- | drivers/gpu/drm/solomon/Makefile | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/solomon/Makefile b/drivers/gpu/drm/solomon/Makefile index 4bfc5acb0447..b5fc792257d7 100644 --- a/drivers/gpu/drm/solomon/Makefile +++ b/drivers/gpu/drm/solomon/Makefile @@ -1,2 +1,3 @@ obj-$(CONFIG_DRM_SSD130X) += ssd130x.o obj-$(CONFIG_DRM_SSD130X_I2C) += ssd130x-i2c.o +obj-$(CONFIG_DRM_SSD130X_SPI) += ssd130x-spi.o |