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Javier Martinez Canillas
74373977d2
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 <[email protected]> Acked-by: Mark Brown <[email protected]> Reviewed-by: Geert Uytterhoeven <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
4 lines
133 B
Makefile
4 lines
133 B
Makefile
obj-$(CONFIG_DRM_SSD130X) += ssd130x.o
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obj-$(CONFIG_DRM_SSD130X_I2C) += ssd130x-i2c.o
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obj-$(CONFIG_DRM_SSD130X_SPI) += ssd130x-spi.o
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