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    Subject[PATCH 4/4] input: touchscreen: ti_am335x_tsc: Use charge delay DT parameter
    Date
    This patch reads charge delay from tsc DT node and writes to
    REG_CHARGEDELAY register. If the charge delay is not specified in DT
    then default value of 0xB000(CHARGEDLY_OPENDLY) is used.

    Signed-off-by: Vignesh R <vigneshr@ti.com>
    ---
    drivers/input/touchscreen/ti_am335x_tsc.c | 8 +++++++-
    1 file changed, 7 insertions(+), 1 deletion(-)

    diff --git a/drivers/input/touchscreen/ti_am335x_tsc.c b/drivers/input/touchscreen/ti_am335x_tsc.c
    index 483fd97c0e0c..20ce76b1b6e7 100644
    --- a/drivers/input/touchscreen/ti_am335x_tsc.c
    +++ b/drivers/input/touchscreen/ti_am335x_tsc.c
    @@ -52,6 +52,7 @@ struct titsc {
    u32 bit_xp, bit_xn, bit_yp, bit_yn;
    u32 inp_xp, inp_xn, inp_yp, inp_yn;
    u32 step_mask;
    + u32 charge_delay;
    };

    static unsigned int titsc_readl(struct titsc *ts, unsigned int reg)
    @@ -177,7 +178,7 @@ static void titsc_step_config(struct titsc *ts_dev)

    config = titsc_readl(ts_dev, REG_IDLECONFIG);
    titsc_writel(ts_dev, REG_CHARGECONFIG, config);
    - titsc_writel(ts_dev, REG_CHARGEDELAY, CHARGEDLY_OPENDLY);
    + titsc_writel(ts_dev, REG_CHARGEDELAY, ts_dev->charge_delay);

    /* coordinate_readouts + 1 ... coordinate_readouts + 2 is for Z */
    config = STEPCONFIG_MODE_HWSYNC |
    @@ -361,6 +362,11 @@ static int titsc_parse_dt(struct platform_device *pdev,
    if (err < 0)
    return err;

    + err = of_property_read_u32(node, "ti,charge-delay",
    + &ts_dev->charge_delay);
    + if (err < 0)
    + ts_dev->charge_delay = CHARGEDLY_OPENDLY;
    +
    return of_property_read_u32_array(node, "ti,wire-config",
    ts_dev->config_inp, ARRAY_SIZE(ts_dev->config_inp));
    }
    --
    1.9.1


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