diff options
| author | Patil, Rachna <rachna@ti.com> | 2013-07-20 17:27:34 +0100 |
|---|---|---|
| committer | Samuel Ortiz <sameo@linux.intel.com> | 2013-07-31 02:04:40 +0200 |
| commit | b5f8b7632c4fc43d42a715a1658588acc24115a9 (patch) | |
| tree | 2d82a4f718fca95e3cd50b8472bec8dbe0c9c44c /drivers/mfd/ti_am335x_tscadc.c | |
| parent | efe3126afce32e3100af3029a80701d47e1b6999 (diff) | |
MFD: ti_tscadc: Disable TSC config registers in adc mode
AFE Pen Ctrl and TouchScreen transistors enabling is not
required when only ADC mode is being used, so check for availability of
TSC driver before accessing control register.
Signed-off-by: Patil, Rachna <rachna@ti.com>
Acked-by: Vaibhav Hiremath <hvaibhav@ti.com>
Signed-off-by: Zubair Lutfullah <zubair.lutfullah@gmail.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers/mfd/ti_am335x_tscadc.c')
| -rw-r--r-- | drivers/mfd/ti_am335x_tscadc.c | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/drivers/mfd/ti_am335x_tscadc.c b/drivers/mfd/ti_am335x_tscadc.c index e0852ecbc767..cd74d594c563 100644 --- a/drivers/mfd/ti_am335x_tscadc.c +++ b/drivers/mfd/ti_am335x_tscadc.c @@ -204,13 +204,14 @@ static int ti_tscadc_probe(struct platform_device *pdev) /* Set the control register bits */ ctrl = CNTRLREG_STEPCONFIGWRT | - CNTRLREG_TSCENB | - CNTRLREG_STEPID | - CNTRLREG_4WIRE; + CNTRLREG_STEPID; + if (tsc_wires > 0) + ctrl |= CNTRLREG_4WIRE | CNTRLREG_TSCENB; tscadc_writel(tscadc, REG_CTRL, ctrl); /* Set register bits for Idle Config Mode */ - tscadc_idle_config(tscadc); + if (tsc_wires > 0) + tscadc_idle_config(tscadc); /* Enable the TSC module enable bit */ ctrl = tscadc_readl(tscadc, REG_CTRL); @@ -290,10 +291,13 @@ static int tscadc_resume(struct device *dev) pm_runtime_get_sync(dev); /* context restore */ - ctrl = CNTRLREG_STEPCONFIGWRT | CNTRLREG_TSCENB | - CNTRLREG_STEPID | CNTRLREG_4WIRE; + ctrl = CNTRLREG_STEPCONFIGWRT | CNTRLREG_STEPID; + if (tscadc_dev->tsc_cell != -1) + ctrl |= CNTRLREG_TSCENB | CNTRLREG_4WIRE; tscadc_writel(tscadc_dev, REG_CTRL, ctrl); - tscadc_idle_config(tscadc_dev); + + if (tscadc_dev->tsc_cell != -1) + tscadc_idle_config(tscadc_dev); am335x_tsc_se_update(tscadc_dev); restore = tscadc_readl(tscadc_dev, REG_CTRL); tscadc_writel(tscadc_dev, REG_CTRL, |