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From f36d060e6965cdbf797308fb2d80a77c4bbaeac3 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 14/16] tscadc: switch to polling instead of interrupts
Signed-off-by: Joel A Fernandes <joelagnel@ti.com>
---
drivers/input/touchscreen/ti_tscadc.c | 16 ++++++++++++++--
1 files 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);
--
1.7.7.5
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