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authorVipul Kumar Samar <vipulkumar.samar@st.com>2012-11-22 23:42:12 -0800
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2012-11-22 23:47:09 -0800
commit037db524a2015607031c70a7935153120601b908 (patch)
tree82387672d07b8fb9d1fcd0098692256de20895cd /drivers/input
parentedbe265d245b0fe05c43e96e52554dacae5dcc70 (diff)
downloadop-kernel-dev-037db524a2015607031c70a7935153120601b908.zip
op-kernel-dev-037db524a2015607031c70a7935153120601b908.tar.gz
Input: stmpe-ts - add DT support for stmpe touchscreen
This patch allows the STMPE Touchscreen driver to be successfully probed and initialised when Device Tree support is enabled. Bindings are mentioned in Documentation too. Signed-off-by: Vipul Kumar Samar <vipulkumar.samar@st.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/input')
-rw-r--r--drivers/input/touchscreen/stmpe-ts.c65
1 files changed, 47 insertions, 18 deletions
diff --git a/drivers/input/touchscreen/stmpe-ts.c b/drivers/input/touchscreen/stmpe-ts.c
index b3f7503..43e7967 100644
--- a/drivers/input/touchscreen/stmpe-ts.c
+++ b/drivers/input/touchscreen/stmpe-ts.c
@@ -17,6 +17,7 @@
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/device.h>
+#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/input.h>
#include <linux/slab.h>
@@ -262,11 +263,53 @@ static void stmpe_ts_close(struct input_dev *dev)
STMPE_TSC_CTRL_TSC_EN, 0);
}
-static int __devinit stmpe_input_probe(struct platform_device *pdev)
+static void stmpe_ts_get_platform_info(struct platform_device *pdev,
+ struct stmpe_touch *ts)
{
struct stmpe *stmpe = dev_get_drvdata(pdev->dev.parent);
- const struct stmpe_platform_data *pdata = stmpe->pdata;
- const struct stmpe_ts_platform_data *ts_pdata = NULL;
+ struct device_node *np = pdev->dev.of_node;
+ struct stmpe_ts_platform_data *ts_pdata = NULL;
+
+ ts->stmpe = stmpe;
+
+ if (stmpe->pdata && stmpe->pdata->ts) {
+ ts_pdata = stmpe->pdata->ts;
+
+ ts->sample_time = ts_pdata->sample_time;
+ ts->mod_12b = ts_pdata->mod_12b;
+ ts->ref_sel = ts_pdata->ref_sel;
+ ts->adc_freq = ts_pdata->adc_freq;
+ ts->ave_ctrl = ts_pdata->ave_ctrl;
+ ts->touch_det_delay = ts_pdata->touch_det_delay;
+ ts->settling = ts_pdata->settling;
+ ts->fraction_z = ts_pdata->fraction_z;
+ ts->i_drive = ts_pdata->i_drive;
+ } else if (np) {
+ u32 val;
+
+ if (!of_property_read_u32(np, "st,sample-time", &val))
+ ts->sample_time = val;
+ if (!of_property_read_u32(np, "st,mod-12b", &val))
+ ts->mod_12b = val;
+ if (!of_property_read_u32(np, "st,ref-sel", &val))
+ ts->ref_sel = val;
+ if (!of_property_read_u32(np, "st,adc-freq", &val))
+ ts->adc_freq = val;
+ if (!of_property_read_u32(np, "st,ave-ctrl", &val))
+ ts->ave_ctrl = val;
+ if (!of_property_read_u32(np, "st,touch-det-delay", &val))
+ ts->touch_det_delay = val;
+ if (!of_property_read_u32(np, "st,settling", &val))
+ ts->settling = val;
+ if (!of_property_read_u32(np, "st,fraction-z", &val))
+ ts->fraction_z = val;
+ if (!of_property_read_u32(np, "st,i-drive", &val))
+ ts->i_drive = val;
+ }
+}
+
+static int __devinit stmpe_input_probe(struct platform_device *pdev)
+{
struct stmpe_touch *ts;
struct input_dev *idev;
int error;
@@ -285,24 +328,10 @@ static int __devinit stmpe_input_probe(struct platform_device *pdev)
return -ENOMEM;
platform_set_drvdata(pdev, ts);
- ts->stmpe = stmpe;
ts->idev = idev;
ts->dev = &pdev->dev;
- if (pdata)
- ts_pdata = pdata->ts;
-
- if (ts_pdata) {
- ts->sample_time = ts_pdata->sample_time;
- ts->mod_12b = ts_pdata->mod_12b;
- ts->ref_sel = ts_pdata->ref_sel;
- ts->adc_freq = ts_pdata->adc_freq;
- ts->ave_ctrl = ts_pdata->ave_ctrl;
- ts->touch_det_delay = ts_pdata->touch_det_delay;
- ts->settling = ts_pdata->settling;
- ts->fraction_z = ts_pdata->fraction_z;
- ts->i_drive = ts_pdata->i_drive;
- }
+ stmpe_ts_get_platform_info(pdev, ts);
INIT_DELAYED_WORK(&ts->work, stmpe_work);
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