From: Nick Dyer <nick@xxxxxxxxxxxxx>
Some systems require different touchscreen configurations depending on the
populated touchscreen. To allow different configs to co-exist in the file
system we need a way to tell the driver, which config should be loaded.
Signed-off-by: Nick Dyer <nick@xxxxxxxxxxxxx>
Signed-off-by: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
---
lst:
- switch to property name to not use underscore
- Add more elaborate commit message
---
Documentation/devicetree/bindings/input/atmel,maxtouch.txt | 3 +++
drivers/input/touchscreen/atmel_mxt_ts.c | 6 +++++-
2 files changed, 8 insertions(+), 1 deletion(-)
diff --git a/Documentation/devicetree/bindings/input/atmel,maxtouch.txt b/Documentation/devicetree/bindings/input/atmel,maxtouch.txt
index c88919480d37..dd2c278824b8 100644
--- a/Documentation/devicetree/bindings/input/atmel,maxtouch.txt
+++ b/Documentation/devicetree/bindings/input/atmel,maxtouch.txt
@@ -31,6 +31,9 @@ Optional properties for main touchpad device:
- reset-gpios: GPIO specifier for the touchscreen's reset pin (active low)
+- atmel,cfg-name: Provide name of configuration file in OBP_RAW format. This
+ will be downloaded from the firmware loader on probe to the device.
+
Example:
touch@4b {
diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index 19378f200c63..c37c5ab8d847 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -318,6 +318,7 @@ struct mxt_data {
struct t7_config t7_cfg;
struct mxt_dbg dbg;
struct gpio_desc *reset_gpio;
+ const char *cfg_name;
/* Cached parameters from object table */
u16 T5_address;
@@ -2151,7 +2152,8 @@ static int mxt_initialize(struct mxt_data *data)
if (error)
return error;
- error = request_firmware_nowait(THIS_MODULE, true, MXT_CFG_NAME,
+ error = request_firmware_nowait(THIS_MODULE, true,
+ data->cfg_name ? : MXT_CFG_NAME,
&client->dev, GFP_KERNEL, data,
mxt_config_cb);
if (error) {
@@ -3015,6 +3017,8 @@ static int mxt_parse_device_properties(struct mxt_data *data)
data->t19_num_keys = n_keys;
}
+ device_property_read_string(dev, "atmel,cfg-name", &data->cfg_name);
+
return 0;
}
--
2.20.1
