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authorJeff Lance <j-lance1@ti.com>2014-09-04 19:01:57 +0200
committerLee Jones <lee.jones@linaro.org>2014-09-26 08:24:03 +0100
commitf0933a60d1902c918249d11fb6d9a5ffd581ef5b (patch)
treebc1c00cebd3567639cc62f0d6ec6d0e5e97b494e /drivers/mfd/ti_am335x_tscadc.c
parent92b8f3abb8c30c15fc79a79ddd1ffab135fc0360 (diff)
mfd: ti_am335x_tscadc: Update logic in CTRL register for 5-wire TS
The logic in AFE_Pen_Ctrl bitmask in the CTRL register is different for five wire versus four or eight wire touschscreens. This patch should fix this for five-wire touch screens. There should be no change needed here for four and eight wire tousch screens. Signed-off-by: Jeff Lance <j-lance1@ti.com> [bigeasy: keep the change mfd only] Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Lee Jones <lee.jones@linaro.org>
Diffstat (limited to 'drivers/mfd/ti_am335x_tscadc.c')
-rw-r--r--drivers/mfd/ti_am335x_tscadc.c30
1 files changed, 17 insertions, 13 deletions
diff --git a/drivers/mfd/ti_am335x_tscadc.c b/drivers/mfd/ti_am335x_tscadc.c
index 121add8be456..d877e777cce6 100644
--- a/drivers/mfd/ti_am335x_tscadc.c
+++ b/drivers/mfd/ti_am335x_tscadc.c
@@ -242,18 +242,20 @@ static int ti_tscadc_probe(struct platform_device *pdev)
tscadc_writel(tscadc, REG_CLKDIV, tscadc->clk_div);
/* Set the control register bits */
- ctrl = CNTRLREG_STEPCONFIGWRT |
- CNTRLREG_STEPID;
- if (tsc_wires > 0)
- ctrl |= CNTRLREG_4WIRE | CNTRLREG_TSCENB;
+ ctrl = CNTRLREG_STEPCONFIGWRT | CNTRLREG_STEPID;
tscadc_writel(tscadc, REG_CTRL, ctrl);
/* Set register bits for Idle Config Mode */
- if (tsc_wires > 0)
+ if (tsc_wires > 0) {
+ tscadc->tsc_wires = tsc_wires;
+ if (tsc_wires == 5)
+ ctrl |= CNTRLREG_5WIRE | CNTRLREG_TSCENB;
+ else
+ ctrl |= CNTRLREG_4WIRE | CNTRLREG_TSCENB;
tscadc_idle_config(tscadc);
+ }
/* Enable the TSC module enable bit */
- ctrl = tscadc_readl(tscadc, REG_CTRL);
ctrl |= CNTRLREG_TSCSSENB;
tscadc_writel(tscadc, REG_CTRL, ctrl);
@@ -325,21 +327,23 @@ static int tscadc_suspend(struct device *dev)
static int tscadc_resume(struct device *dev)
{
struct ti_tscadc_dev *tscadc_dev = dev_get_drvdata(dev);
- unsigned int restore, ctrl;
+ u32 ctrl;
pm_runtime_get_sync(dev);
/* context restore */
ctrl = CNTRLREG_STEPCONFIGWRT | CNTRLREG_STEPID;
- if (tscadc_dev->tsc_cell != -1)
- ctrl |= CNTRLREG_TSCENB | CNTRLREG_4WIRE;
tscadc_writel(tscadc_dev, REG_CTRL, ctrl);
- if (tscadc_dev->tsc_cell != -1)
+ if (tscadc_dev->tsc_cell != -1) {
+ if (tscadc_dev->tsc_wires == 5)
+ ctrl |= CNTRLREG_5WIRE | CNTRLREG_TSCENB;
+ else
+ ctrl |= CNTRLREG_4WIRE | CNTRLREG_TSCENB;
tscadc_idle_config(tscadc_dev);
- restore = tscadc_readl(tscadc_dev, REG_CTRL);
- tscadc_writel(tscadc_dev, REG_CTRL,
- (restore | CNTRLREG_TSCSSENB));
+ }
+ ctrl |= CNTRLREG_TSCSSENB;
+ tscadc_writel(tscadc_dev, REG_CTRL, ctrl);
tscadc_writel(tscadc_dev, REG_CLKDIV, tscadc_dev->clk_div);