Messages in this thread | | | Date | Fri, 21 Nov 2014 22:40:05 +0100 | From | Richard Cochran <> | Subject | Re: [PATCH v4 3/6] mfd: ti_am335x_tscadc: Remove unwanted reg_se_cache save |
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On Fri, Nov 21, 2014 at 07:17:18PM +0100, Johannes Pointner wrote: > Before the patches were also jumps but I thought it is something > Vignesh should know. Maybe there is some fix for that too? > As Richard also noted, it would be nice if ti could let us know how to > get the delay values right. By trial and error is IMHO not the best > way.
That is not only an opinion, it is a matter of fact. TI really dropped the ball on this one. I thought the patch series was a sign they finally were going to properly address this issue. Wrong again.
The data sheet for the TI part used to have a reference to an app-note for the touch controller.
spruh73f page 1154
The Pen IRQ can only occur if the correct Pen Ctrl bits are high (AFE Pen Ctrl bits 6:5 in the TSC_ADC control register) and if the correct ground transistor biasing is set in the StepConfig [N] Register. Refer to the application notes for the correct settings.
I searched high and low for this application note. Then, the data sheet got revised.
Thanks, Richard
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