[PATCH v15 2/3] HID: i2c-hid-of: Expose the touchscreen-inverted properties

Alistair Francis
2021-12-02T11:56:53Z

Allow the touchscreen-inverted-x/y device tree properties to control the
HID_QUIRK_X_INVERT/HID_QUIRK_Y_INVERT quirks for the hid-input device.

Signed-off-by: Alistair Francis <alistair@alistair23.me>
Acked-by: Rob Herring <robh@kernel.org>
---
.../devicetree/bindings/input/hid-over-i2c.txt | 2 ++
drivers/hid/i2c-hid/i2c-hid-acpi.c | 2 +-
drivers/hid/i2c-hid/i2c-hid-core.c | 4 +++-
drivers/hid/i2c-hid/i2c-hid-of-goodix.c | 2 +-
drivers/hid/i2c-hid/i2c-hid-of.c | 11 ++++++++++-
drivers/hid/i2c-hid/i2c-hid.h | 2 +-
6 files changed, 18 insertions(+), 5 deletions(-)

diff --git a/Documentation/devicetree/bindings/input/hid-over-i2c.txt b/Documentation/devicetree/bindings/input/hid-over-i2c.txt
index c76bafaf98d2..34c43d3bddfd 100644
--- a/Documentation/devicetree/bindings/input/hid-over-i2c.txt
+++ b/Documentation/devicetree/bindings/input/hid-over-i2c.txt
@@ -32,6 +32,8 @@ device-specific compatible properties, which should be used in addition to the
- vdd-supply: phandle of the regulator that provides the supply voltage.
- post-power-on-delay-ms: time required by the device after enabling its regulators
or powering it on, before it is ready for communication.
+- touchscreen-inverted-x: See touchscreen.txt
+- touchscreen-inverted-y: See touchscreen.txt

Example:

diff --git a/drivers/hid/i2c-hid/i2c-hid-acpi.c b/drivers/hid/i2c-hid/i2c-hid-acpi.c
index a6f0257a26de..b96ae15e0ad9 100644
--- a/drivers/hid/i2c-hid/i2c-hid-acpi.c
+++ b/drivers/hid/i2c-hid/i2c-hid-acpi.c
@@ -111,7 +111,7 @@ static int i2c_hid_acpi_probe(struct i2c_client *client)
}

return i2c_hid_core_probe(client, &ihid_acpi->ops,
- hid_descriptor_address);
+ hid_descriptor_address, 0);
}

static const struct acpi_device_id i2c_hid_acpi_match[] = {
diff --git a/drivers/hid/i2c-hid/i2c-hid-core.c b/drivers/hid/i2c-hid/i2c-hid-core.c
index 517141138b00..4804d71e5293 100644
--- a/drivers/hid/i2c-hid/i2c-hid-core.c
+++ b/drivers/hid/i2c-hid/i2c-hid-core.c
@@ -912,7 +912,7 @@ static void i2c_hid_core_shutdown_tail(struct i2c_hid *ihid)
}

int i2c_hid_core_probe(struct i2c_client *client, struct i2chid_ops *ops,
- u16 hid_descriptor_address)
+ u16 hid_descriptor_address, u32 quirks)
{
int ret;
struct i2c_hid *ihid;
@@ -1009,6 +1009,8 @@ int i2c_hid_core_probe(struct i2c_client *client, struct i2chid_ops *ops,
goto err_mem_free;
}

+ hid->quirks |= quirks;
+
return 0;

err_mem_free:
diff --git a/drivers/hid/i2c-hid/i2c-hid-of-goodix.c b/drivers/hid/i2c-hid/i2c-hid-of-goodix.c
index 52674149a275..b4dad66fa954 100644
--- a/drivers/hid/i2c-hid/i2c-hid-of-goodix.c
+++ b/drivers/hid/i2c-hid/i2c-hid-of-goodix.c
@@ -150,7 +150,7 @@ static int i2c_hid_of_goodix_probe(struct i2c_client *client,
goodix_i2c_hid_deassert_reset(ihid_goodix, true);
mutex_unlock(&ihid_goodix->regulator_mutex);

- return i2c_hid_core_probe(client, &ihid_goodix->ops, 0x0001);
+ return i2c_hid_core_probe(client, &ihid_goodix->ops, 0x0001, 0);
}

static const struct goodix_i2c_hid_timing_data goodix_gt7375p_timing_data = {
diff --git a/drivers/hid/i2c-hid/i2c-hid-of.c b/drivers/hid/i2c-hid/i2c-hid-of.c
index 4bf7cea92637..b16349d6e9de 100644
--- a/drivers/hid/i2c-hid/i2c-hid-of.c
+++ b/drivers/hid/i2c-hid/i2c-hid-of.c
@@ -21,6 +21,7 @@

#include <linux/delay.h>
#include <linux/device.h>
+#include <linux/hid.h>
#include <linux/i2c.h>
#include <linux/kernel.h>
#include <linux/module.h>
@@ -71,6 +72,7 @@ static int i2c_hid_of_probe(struct i2c_client *client,
struct device *dev = &client->dev;
struct i2c_hid_of *ihid_of;
u16 hid_descriptor_address;
+ u32 quirks = 0;
int ret;
u32 val;

@@ -105,8 +107,15 @@ static int i2c_hid_of_probe(struct i2c_client *client,
if (ret)
return ret;

+ if (device_property_read_bool(dev, "touchscreen-inverted-x")) {
+ quirks |= HID_QUIRK_X_INVERT;
+ }
+ if (device_property_read_bool(dev, "touchscreen-inverted-y")) {
+ quirks |= HID_QUIRK_Y_INVERT;
+ }
+
return i2c_hid_core_probe(client, &ihid_of->ops,
- hid_descriptor_address);
+ hid_descriptor_address, quirks);
}

static const struct of_device_id i2c_hid_of_match[] = {
diff --git a/drivers/hid/i2c-hid/i2c-hid.h b/drivers/hid/i2c-hid/i2c-hid.h
index 05a7827d211a..236cc062d5ef 100644
--- a/drivers/hid/i2c-hid/i2c-hid.h
+++ b/drivers/hid/i2c-hid/i2c-hid.h
@@ -32,7 +32,7 @@ struct i2chid_ops {
};

int i2c_hid_core_probe(struct i2c_client *client, struct i2chid_ops *ops,
- u16 hid_descriptor_address);
+ u16 hid_descriptor_address, u32 quirks);
int i2c_hid_core_remove(struct i2c_client *client);

void i2c_hid_core_shutdown(struct i2c_client *client);
--
2.31.1