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Input: stmpe-ts - add DT support for stmpe touchscreen

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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 <[email protected]>
Signed-off-by: Viresh Kumar <[email protected]>
Signed-off-by: Dmitry Torokhov <[email protected]>
This commit is contained in:
Vipul Kumar Samar 2012-11-22 23:42:12 -08:00 • committed by Dmitry Torokhov
commit 037db524a2
3 changed files with 91 additions and 18 deletions
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65
drivers/input/touchscreen/stmpe-ts.c
View file

@ -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);