Hi Lee,

quoted

 static const struct ti_tscadc_data tscdata = {
 	.has_tsc = true,
+	.has_mag = false,
 	.name_tscmag = "TI-am335x-tsc",
 	.compat_tscmag = "ti,am3359-tsc",
 	.name_adc = "TI-am335x-adc",

@@ -341,11 +356,25 @@ static const struct ti_tscadc_data tscdata = {
 	.target_clk_rate = TSC_ADC_CLK,
 };
 
+static const struct ti_tscadc_data magdata = {
+	.has_tsc = false,
+	.has_mag = true,  

Why 2 bools?

Better to have a single u8:

  MODE_TOUCHSCREEN
  MODE_MAG_STRING
  MODE_NONE

I was about to add an enum for these but actually it is totally
redundant with the compatible name. Instead, I have added a
helper which checks the compatible string and gives the same
information.

Thanks,
Miquèl