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    SubjectRe: [PATCH v4 3/6] mfd: ti_am335x_tscadc: Remove unwanted reg_se_cache save
    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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