Input: silead_gsl1680 - document firmware-name, fix implementation

The driver has supported touchscreen-fw-name to specify the firmware to
load since it has been merged, but this was omitted from the dt-binding
documentation.

During review of adding touchscreen-fw-name to the binding documentation
it was brought up that there is a standard property name called
"firmware-name" for this, which should be used.

Since there are no users of touchscreen-fw-name yet, this commit
adds documentation of "firmware-name" to the dt-binding documentation
and switches the driver over to use this.

This commit also makes the driver add a "silead/" prefix to the
firmware name from dt before calling request_firmware. That the
firmware files are stored under /lib/firmware/silead under Linux
is an implementation detail and does not belong in devicetree.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

diff --git a/Documentation/devicetree/bindings/input/touchscreen/silead_gsl1680.txt b/Documentation/devicetree/bindings/input/touchscreen/silead_gsl1680.txt
index 1112e0d..820fee4 100644 (file)
--- a/Documentation/devicetree/bindings/input/touchscreen/silead_gsl1680.txt
+++ b/Documentation/devicetree/bindings/input/touchscreen/silead_gsl1680.txt
@@ -13,6 +13,7 @@ Required properties:
 - touchscreen-size-y     : See touchscreen.txt
 
 Optional properties:
+- firmware-name                  : File basename (string) for board specific firmware
 - touchscreen-inverted-x  : See touchscreen.txt
 - touchscreen-inverted-y  : See touchscreen.txt
 - touchscreen-swapped-x-y : See touchscreen.txt

diff --git a/drivers/input/touchscreen/silead.c b/drivers/input/touchscreen/silead.c
index b2744a6..c7ab116 100644 (file)
--- a/drivers/input/touchscreen/silead.c
+++ b/drivers/input/touchscreen/silead.c
@@ -390,9 +390,10 @@ static void silead_ts_read_props(struct i2c_client *client)
                data->max_fingers = 5; /* Most devices handle up-to 5 fingers */
        }
 
-       error = device_property_read_string(dev, "touchscreen-fw-name", &str);
+       error = device_property_read_string(dev, "firmware-name", &str);
        if (!error)
-               snprintf(data->fw_name, sizeof(data->fw_name), "%s", str);
+               snprintf(data->fw_name, sizeof(data->fw_name),
+                        "silead/%s", str);
        else
                dev_dbg(dev, "Firmware file name read error. Using default.");
 }