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HID: i2c-hid: Allow ACPI systems to specify "post-power-on-delay-ms" 

The property "post-power-on-delay-ms" allows a platform to specify
the delay needed after power-on, but only via device trees currently.
Use device_property_* instead of of_* reads to allow ACPI systems to
also provide the same information. This is useful for Wacom hardware
on ACPI systems.

Signed-off-by: Rajat Jain <rajatja@google.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
hifive-unleashed-5.1
Rajat Jain 2017-10-03 11:19:21 -07:00 committed by Jiri Kosina
parent 20df15783a
commit 847989e548
2 changed files with 14 additions and 6 deletions
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2
Documentation/devicetree/bindings/input/hid-over-i2c.txt
View File

@ -31,7 +31,7 @@ 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
before it is ready for communication. Must be used with 'vdd-supply'.
or powering it on, before it is ready for communication.
Example:

18
drivers/hid/i2c-hid/i2c-hid.c
View File

@ -934,11 +934,6 @@ static int i2c_hid_of_probe(struct i2c_client *client,
}
pdata->hid_descriptor_address = val;
ret = of_property_read_u32(dev->of_node, "post-power-on-delay-ms",
&val);
if (!ret)
pdata->post_power_delay_ms = val;
return 0;
}
@ -955,6 +950,16 @@ static inline int i2c_hid_of_probe(struct i2c_client *client,
}
#endif
static void i2c_hid_fwnode_probe(struct i2c_client *client,
struct i2c_hid_platform_data *pdata)
{
u32 val;
if (!device_property_read_u32(&client->dev, "post-power-on-delay-ms",
&val))
pdata->post_power_delay_ms = val;
}
static int i2c_hid_probe(struct i2c_client *client,
const struct i2c_device_id *dev_id)
{
@ -998,6 +1003,9 @@ static int i2c_hid_probe(struct i2c_client *client,
ihid->pdata = *platform_data;
}
/* Parse platform agnostic common properties from ACPI / device tree */
i2c_hid_fwnode_probe(client, &ihid->pdata);
ihid->pdata.supply = devm_regulator_get(&client->dev, "vdd");
if (IS_ERR(ihid->pdata.supply)) {
ret = PTR_ERR(ihid->pdata.supply);