Merge commit 'v2.6.31-rc8' into next

[mirror_ubuntu-kernels.git] / drivers / input / touchscreen / ucb1400_ts.c

diff --git a/drivers/input/touchscreen/ucb1400_ts.c b/drivers/input/touchscreen/ucb1400_ts.c
index 6954f55001080d29b337a37c9398b6c8f867ec1a..095f84b1f56e33769a4513a9d635aa3b0100f7f3 100644 (file)
--- a/drivers/input/touchscreen/ucb1400_ts.c
+++ b/drivers/input/touchscreen/ucb1400_ts.c
@@ -128,9 +128,10 @@ static inline unsigned int ucb1400_ts_read_yres(struct ucb1400_ts *ucb)
        return ucb1400_adc_read(ucb->ac97, 0, adcsync);
 }
 
-static inline int ucb1400_ts_pen_down(struct snd_ac97 *ac97)
+static inline int ucb1400_ts_pen_up(struct snd_ac97 *ac97)
 {
        unsigned short val = ucb1400_reg_read(ac97, UCB_TS_CR);
+
        return val & (UCB_TS_CR_TSPX_LOW | UCB_TS_CR_TSMX_LOW);
 }
 
@@ -170,11 +171,11 @@ static void ucb1400_handle_pending_irq(struct ucb1400_ts *ucb)
        ucb1400_reg_write(ucb->ac97, UCB_IE_CLEAR, isr);
        ucb1400_reg_write(ucb->ac97, UCB_IE_CLEAR, 0);
 
-       if (isr & UCB_IE_TSPX) {
+       if (isr & UCB_IE_TSPX)
                ucb1400_ts_irq_disable(ucb->ac97);
-               enable_irq(ucb->irq);
-       } else
-               printk(KERN_ERR "ucb1400: unexpected IE_STATUS = %#x\n", isr);
+       else
+               dev_dbg(&ucb->ts_idev->dev, "ucb1400: unexpected IE_STATUS = %#x\n", isr);
+       enable_irq(ucb->irq);
 }
 
 static int ucb1400_ts_thread(void *_ucb)
@@ -209,7 +210,7 @@ static int ucb1400_ts_thread(void *_ucb)
 
                msleep(10);
 
-               if (ucb1400_ts_pen_down(ucb->ac97)) {
+               if (ucb1400_ts_pen_up(ucb->ac97)) {
                        ucb1400_ts_irq_enable(ucb->ac97);
 
                        /*
@@ -345,6 +346,7 @@ static int ucb1400_ts_detect_irq(struct ucb1400_ts *ucb)
 static int ucb1400_ts_probe(struct platform_device *dev)
 {
        int error, x_res, y_res;
+       u16 fcsr;
        struct ucb1400_ts *ucb = dev->dev.platform_data;
 
        ucb->ts_idev = input_allocate_device();
@@ -382,6 +384,14 @@ static int ucb1400_ts_probe(struct platform_device *dev)
        ucb->ts_idev->evbit[0]          = BIT_MASK(EV_ABS) | BIT_MASK(EV_KEY);
        ucb->ts_idev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
 
+       /*
+        * Enable ADC filter to prevent horrible jitter on Colibri.
+        * This also further reduces jitter on boards where ADCSYNC
+        * pin is connected.
+        */
+       fcsr = ucb1400_reg_read(ucb->ac97, UCB_FCSR);
+       ucb1400_reg_write(ucb->ac97, UCB_FCSR, fcsr | UCB_FCSR_AVE);
+
        ucb1400_adc_enable(ucb->ac97);
        x_res = ucb1400_ts_read_xres(ucb);
        y_res = ucb1400_ts_read_yres(ucb);