From f36d060e6965cdbf797308fb2d80a77c4bbaeac3 Mon Sep 17 00:00:00 2001 From: Joel A Fernandes 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 --- 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