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From 5b0c06b556db15cac8d14eb7e74307521481e185 Mon Sep 17 00:00:00 2001
From: Joel A Fernandes <joelagnel@ti.com>
Date: Mon, 28 Nov 2011 20:55:25 -0600
Subject: [PATCH 12/21] tscadc: Trigger through sysfs
Signed-off-by: Joel A Fernandes <joelagnel@ti.com>
Conflicts:
drivers/input/touchscreen/ti_tscadc.c
---
drivers/input/touchscreen/ti_tscadc.c | 60 ++++++++++++++++++++++++++++++---
include/linux/input/ti_tscadc.h | 1 +
2 files changed, 56 insertions(+), 5 deletions(-)
diff --git a/drivers/input/touchscreen/ti_tscadc.c b/drivers/input/touchscreen/ti_tscadc.c
index 0b91bdc..a74d9ba 100644
--- a/drivers/input/touchscreen/ti_tscadc.c
+++ b/drivers/input/touchscreen/ti_tscadc.c
@@ -26,6 +26,17 @@
#include <linux/io.h>
#include <linux/input/ti_tscadc.h>
#include <linux/delay.h>
+#include <linux/device.h>
+
+size_t do_adc_sample(struct kobject *, struct attribute *, char *);
+static DEVICE_ATTR(ain1, S_IRUGO, do_adc_sample, NULL);
+static DEVICE_ATTR(ain2, S_IRUGO, do_adc_sample, NULL);
+static DEVICE_ATTR(ain3, S_IRUGO, do_adc_sample, NULL);
+static DEVICE_ATTR(ain4, S_IRUGO, do_adc_sample, NULL);
+static DEVICE_ATTR(ain5, S_IRUGO, do_adc_sample, NULL);
+static DEVICE_ATTR(ain6, S_IRUGO, do_adc_sample, NULL);
+static DEVICE_ATTR(ain7, S_IRUGO, do_adc_sample, NULL);
+static DEVICE_ATTR(ain8, S_IRUGO, do_adc_sample, NULL);
/* Memory mapped registers here have incorrect offsets!
* Correct after referring TRM */
@@ -144,12 +155,12 @@ static void tsc_adc_step_config(struct tscadc *ts_dev, int channel)
stepconfig = TSCADC_STEPCONFIG_MODE_SWONESHOT |
TSCADC_STEPCONFIG_2SAMPLES_AVG |
((channel-1) << 19);
-
+
delay = TSCADC_STEPCONFIG_SAMPLEDLY | TSCADC_STEPCONFIG_OPENDLY;
tscadc_writel(ts_dev, TSCADC_REG_STEPCONFIG(10), stepconfig);
tscadc_writel(ts_dev, TSCADC_REG_STEPDELAY(10), delay);
-
+
/* Get the ball rolling, this will trigger the FSM to step through
* as soon as TSC_ADC_SS is turned on */
tscadc_writel(ts_dev, TSCADC_REG_SE, TSCADC_STPENB_STEPENB_GENERAL);
@@ -199,7 +210,7 @@ static irqreturn_t tsc_adc_interrupt(int irq, void *dev)
irqclr |= TSCADC_IRQENB_FIFO1THRES;
}
- mdelay(500);
+ // mdelay(500);
tscadc_writel(ts_dev, TSCADC_REG_IRQSTATUS, irqclr);
@@ -207,7 +218,7 @@ static irqreturn_t tsc_adc_interrupt(int irq, void *dev)
tscadc_writel(ts_dev, TSCADC_REG_IRQEOI, 0x0);
/* Turn on Step 1 again */
- tscadc_writel(ts_dev, TSCADC_REG_SE, TSCADC_STPENB_STEPENB_GENERAL);
+ // tscadc_writel(ts_dev, TSCADC_REG_SE, TSCADC_STPENB_STEPENB_GENERAL);
return IRQ_HANDLED;
}
@@ -461,6 +472,34 @@ static irqreturn_t tsc_interrupt(int irq, void *dev)
* The functions for inserting/removing driver as a module.
*/
+size_t do_adc_sample(struct kobject *kobj, struct attribute *attr, char *buf) {
+ struct platform_device *pdev;
+ struct device *dev;
+ struct tscadc *ts_dev;
+ int channel_num;
+
+ pdev = (struct platform_device *)container_of(kobj, struct device, kobj);
+ dev = &pdev->dev;
+
+ ts_dev = dev_get_drvdata(dev);
+
+ if(strncmp(attr->name, "ain", 3)) {
+ printk("Invalid ain num\n");
+ return -EINVAL;
+ }
+
+ channel_num = attr->name[3] - 0x30;
+ if(channel_num > 8 || channel_num < 1) {
+ printk("Invalid channel_num=%d\n", channel_num);
+ return -EINVAL;
+ }
+
+ tsc_adc_step_config(ts_dev, channel_num);
+
+ memcpy(buf, attr->name, strlen(attr->name)+1);
+ return strlen(attr->name);
+}
+
static int __devinit tscadc_probe(struct platform_device *pdev)
{
struct tscadc *ts_dev;
@@ -472,6 +511,18 @@ static int __devinit tscadc_probe(struct platform_device *pdev)
struct resource *res;
struct clk *clk;
+ printk("dev addr = %p\n", &pdev->dev);
+ printk("pdev addr = %p\n", pdev);
+
+ device_create_file(&pdev->dev, &dev_attr_ain1);
+ device_create_file(&pdev->dev, &dev_attr_ain2);
+ device_create_file(&pdev->dev, &dev_attr_ain3);
+ device_create_file(&pdev->dev, &dev_attr_ain4);
+ device_create_file(&pdev->dev, &dev_attr_ain5);
+ device_create_file(&pdev->dev, &dev_attr_ain6);
+ device_create_file(&pdev->dev, &dev_attr_ain7);
+ device_create_file(&pdev->dev, &dev_attr_ain8);
+
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(&pdev->dev, "no memory resource defined.\n");
@@ -604,7 +655,6 @@ static int __devinit tscadc_probe(struct platform_device *pdev)
goto err_fail;
}
else {
- tsc_adc_step_config(ts_dev, 8);
tscadc_writel(ts_dev, TSCADC_REG_FIFO0THR, 0);
irqenable = TSCADC_IRQENB_FIFO0THRES;
}
diff --git a/include/linux/input/ti_tscadc.h b/include/linux/input/ti_tscadc.h
index 850cd4b..fc239c6 100644
--- a/include/linux/input/ti_tscadc.h
+++ b/include/linux/input/ti_tscadc.h
@@ -13,6 +13,7 @@
* 0.
* @x_plate_resistance: X plate resistance.
*/
+#include <linux/device.h>
#define TI_TSCADC_TSCMODE 0
#define TI_TSCADC_GENMODE 1
--
1.7.7.4
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