diff options
| author | Vignesh R <vigneshr@ti.com> | 2015-02-03 11:45:34 -0800 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2015-02-03 11:50:38 -0800 |
| commit | bf223612a4cd65d5eb15d6adc8422c7d61ae75dd (patch) | |
| tree | f4c31201c77ba2e66cd78495ec3aa1efc630df53 /drivers/input | |
| parent | 344d635b9a41b19837ccf8083a99ea688027019c (diff) | |
Input: ti_am335x_tsc - read charge delay from DT
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 0x400(CHARGEDLY_OPENDLY) is used.
Signed-off-by: Vignesh R <vigneshr@ti.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/input')
| -rw-r--r-- | drivers/input/touchscreen/ti_am335x_tsc.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/drivers/input/touchscreen/ti_am335x_tsc.c b/drivers/input/touchscreen/ti_am335x_tsc.c index 0625c102a1d0..7c0f6b21559d 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 | @@ -368,6 +369,17 @@ 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 ti,charge-delay value is not specified, then use + * CHARGEDLY_OPENDLY as the default value. + */ + if (err < 0) { + ts_dev->charge_delay = CHARGEDLY_OPENDLY; + dev_warn(&pdev->dev, "ti,charge-delay not specified\n"); + } + return of_property_read_u32_array(node, "ti,wire-config", ts_dev->config_inp, ARRAY_SIZE(ts_dev->config_inp)); } |