Add device tree support for TPS6507x touchscreen input device.
Signed-off-by: Sushaanth Srirangapathi <sushaanth.s@xxxxxx>
---
drivers/input/touchscreen/tps6507x-ts.c | 51 ++++++++++++++++++++++++++++---
1 file changed, 47 insertions(+), 4 deletions(-)
diff --git a/drivers/input/touchscreen/tps6507x-ts.c b/drivers/input/touchscreen/tps6507x-ts.c
index a340bfc..4c28369 100644
--- a/drivers/input/touchscreen/tps6507x-ts.c
+++ b/drivers/input/touchscreen/tps6507x-ts.c
@@ -19,6 +19,7 @@
#include <linux/input.h>
#include <linux/input-polldev.h>
#include <linux/platform_device.h>
+#include <linux/of.h>
#include <linux/mfd/tps6507x.h>
#include <linux/input/tps6507x-ts.h>
#include <linux/delay.h>
@@ -32,6 +33,10 @@
TPS6507X_ADCONFIG_INPUT_REAL_TSC)
#define TPS6507X_ADCONFIG_POWER_DOWN_TS (TPS6507X_ADCONFIG_INPUT_REAL_TSC)
+#define TPS6507X_VENDOR 0
+#define TPS6507X_PRODUCT 65070
+#define TPS6507X_VERSION 0x100
+
struct ts_event {
u16 x;
u16 y;
@@ -199,6 +204,44 @@ done:
tps6507x_adc_standby(tsc);
}
+static struct tps6507x_board *tps6507x_ts_parse_dt_reg_data(
+ struct platform_device *pdev) {
+ struct tps6507x_board *tps_board;
+ struct device_node *np = pdev->dev.parent->of_node;
+ struct touchscreen_init_data *reg_data;
+ struct device_node *touchscreen;
+ u32 min_pressure;
+
+ tps_board = devm_kzalloc(&pdev->dev, sizeof(*tps_board),
+ GFP_KERNEL);
+ if (!tps_board)
+ return NULL;
+
+ touchscreen = of_get_child_by_name(np, "touchscreen");
+ if (!touchscreen) {
+ dev_err(&pdev->dev, "touchscreen node not found\n");
+ return NULL;
+ }
+
+ reg_data = devm_kzalloc(&pdev->dev, sizeof(struct touchscreen_init_data),
+ GFP_KERNEL);
+ if (!reg_data)
+ return NULL;
+
+ reg_data->poll_period = TSC_DEFAULT_POLL_PERIOD;
+ reg_data->vendor = TPS6507X_VENDOR;
+ reg_data->product = TPS6507X_PRODUCT;
+ reg_data->version = TPS6507X_VERSION;
+ if (!of_property_read_u32(touchscreen, "ti,min-pressure",
+ &min_pressure))
+ reg_data->min_pressure = min_pressure;
+ else
+ reg_data->min_pressure = TPS_DEFAULT_MIN_PRESSURE;
+ tps_board->tps6507x_ts_init_data = reg_data;
+
+ return tps_board;
+}
+
static int tps6507x_ts_probe(struct platform_device *pdev)
{
struct tps6507x_dev *tps6507x_dev = dev_get_drvdata(pdev->dev.parent);
@@ -214,10 +257,10 @@ static int tps6507x_ts_probe(struct platform_device *pdev)
* coming from the board-evm file.
*/
tps_board = dev_get_platdata(tps6507x_dev->dev);
- if (!tps_board) {
- dev_err(tps6507x_dev->dev,
- "Could not find tps6507x platform data\n");
- return -ENODEV;
+
+ if (IS_ENABLED(CONFIG_OF) && !tps_board &&
+ tps6507x_dev->dev->of_node) {
+ tps_board = tps6507x_ts_parse_dt_reg_data(pdev);
}
/*
--
1.7.9.5
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