1 files changed, 54 insertions, 0 deletions

diff --git a/recipes-kernel/linux/linux-ti33x-psp-3.2/beaglebone/0012-tscadc-switch-to-polling-instead-of-interrupts.patch b/recipes-kernel/linux/linux-ti33x-psp-3.2/beaglebone/0012-tscadc-switch-to-polling-instead-of-interrupts.patch
new file mode 100644
index 00000000..d1456ada
--- /dev/null
+++ b/recipes-kernel/linux/linux-ti33x-psp-3.2/beaglebone/0012-tscadc-switch-to-polling-instead-of-interrupts.patch
@@ -0,0 +1,54 @@
+From 994bbaf10e91e859c54ba238e72e8f6f496c14e0 Mon Sep 17 00:00:00 2001
+From: Joel A Fernandes <joelagnel@ti.com>
+Date: Tue, 29 Nov 2011 09:44:22 -0600
+Subject: [PATCH 12/22] tscadc: switch to polling instead of interrupts
+
+Signed-off-by: Joel A Fernandes <joelagnel@ti.com>
+---
+ drivers/input/touchscreen/ti_tscadc.c |   16 ++++++++++++++--
+ 1 file changed, 14 insertions(+), 2 deletions(-)
+
+diff --git a/drivers/input/touchscreen/ti_tscadc.c b/drivers/input/touchscreen/ti_tscadc.c
+index 1f9cbf5..8e2a994 100644
+--- a/drivers/input/touchscreen/ti_tscadc.c
++++ b/drivers/input/touchscreen/ti_tscadc.c
+@@ -477,6 +477,8 @@ size_t do_adc_sample(struct kobject *kobj, struct attribute *attr, char *buf) {
+        struct device *dev;
+        struct tscadc *ts_dev;
+        int channel_num;
++       int fifo0count = 0;
++       int read_sample = 0;
+ 
+        pdev = (struct platform_device *)container_of(kobj, struct device, kobj);
+        dev = &pdev->dev;
+@@ -496,7 +498,17 @@ size_t do_adc_sample(struct kobject *kobj, struct attribute *attr, char *buf) {
+ 
+        tsc_adc_step_config(ts_dev, channel_num);
+ 
+-       memcpy(buf, attr->name, strlen(attr->name)+1);
++       do {
++               fifo0count = tscadc_readl(ts_dev, TSCADC_REG_FIFO0CNT);
++       }
++       while (!fifo0count);
++
++       while (fifo0count--) {
++                         read_sample = tscadc_readl(ts_dev, TSCADC_REG_FIFO0) & 0xfff;
++                         // printk("polling sample: %d: %x\n", fifo0count, read_sample);
++       }
++       sprintf(buf, "%d", read_sample);
++
+        return strlen(attr->name);
+ }
+ 
+@@ -656,7 +668,7 @@ static      int __devinit tscadc_probe(struct platform_device *pdev)
+        }
+        else {
+                tscadc_writel(ts_dev, TSCADC_REG_FIFO0THR, 0);
+-               irqenable = TSCADC_IRQENB_FIFO0THRES;
++               irqenable = 0; // TSCADC_IRQENB_FIFO0THRES;
+        }
+        tscadc_writel(ts_dev, TSCADC_REG_IRQENABLE, irqenable);
+ 
+-- 
+1.7.9.4
+