Markus Elfring [off-list ref] writes:

quoted

+++ b/drivers/gpu/drm/solomon/ssd130x.c

@@ -146,6 +146,33 @@
 #define SSD133X_COLOR_DEPTH_256			0x0
 #define SSD133X_COLOR_DEPTH_65K			0x1
 
+/* ssd135x commands */
+#define SSD135X_SET_COL_RANGE			0x15
+#define SSD135X_WRITE_RAM			0x5c
+#define SSD135X_SET_ROW_RANGE			0x75

[...]

How do you think about to use an enumeration for such data?
https://en.wikipedia.org/wiki/Enumerated_type#C_and_syntactically_similar_languages

Thank you for the suggestion.

I used #define to stay consistent with the rest of ssd130x.c, where the
command constants for the other families are all defined the same way.
In my opinion an enum could be a readable solution for these values, but I
don't think the switch should be included in this series.

-- 
Thanks,

Amit