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authorJiri Kosina <jkosina@suse.cz>2018-08-20 19:07:01 +0300
committerJiri Kosina <jkosina@suse.cz>2018-08-20 19:07:01 +0300
commit4435b5774cdf9b3547934333e8facbb3fc1057be (patch)
tree41ffa9a86d6d801fe935f600a91dedce8d5be628
parent5a12d86ce3a93b6442963e5f6e6511e8f470f760 (diff)
parent6136f97cd2dd2b5a88d62bd73cc663a803124c09 (diff)
downloadlinux-4435b5774cdf9b3547934333e8facbb3fc1057be.tar.xz
Merge branch 'for-4.19/i2c-hid' into for-linus
Low voltage support for i2c-hid
-rw-r--r--Documentation/devicetree/bindings/input/hid-over-i2c.txt3
-rw-r--r--drivers/hid/i2c-hid/i2c-hid.c57
-rw-r--r--include/linux/platform_data/i2c-hid.h7
3 files changed, 32 insertions, 35 deletions
diff --git a/Documentation/devicetree/bindings/input/hid-over-i2c.txt b/Documentation/devicetree/bindings/input/hid-over-i2c.txt
index 4d3da9d91de4..89e6ab89ba38 100644
--- a/Documentation/devicetree/bindings/input/hid-over-i2c.txt
+++ b/Documentation/devicetree/bindings/input/hid-over-i2c.txt
@@ -26,7 +26,8 @@ device-specific compatible properties, which should be used in addition to the
- compatible:
* "wacom,w9013" (Wacom W9013 digitizer). Supports:
- - vdd-supply
+ - vdd-supply (3.3V)
+ - vddl-supply (1.8V)
- post-power-on-delay-ms
- vdd-supply: phandle of the regulator that provides the supply voltage.
diff --git a/drivers/hid/i2c-hid/i2c-hid.c b/drivers/hid/i2c-hid/i2c-hid.c
index eae0cb3ddec6..2ce194a84868 100644
--- a/drivers/hid/i2c-hid/i2c-hid.c
+++ b/drivers/hid/i2c-hid/i2c-hid.c
@@ -1002,18 +1002,18 @@ static int i2c_hid_probe(struct i2c_client *client,
return client->irq;
}
- ihid = kzalloc(sizeof(struct i2c_hid), GFP_KERNEL);
+ ihid = devm_kzalloc(&client->dev, sizeof(*ihid), GFP_KERNEL);
if (!ihid)
return -ENOMEM;
if (client->dev.of_node) {
ret = i2c_hid_of_probe(client, &ihid->pdata);
if (ret)
- goto err;
+ return ret;
} else if (!platform_data) {
ret = i2c_hid_acpi_pdata(client, &ihid->pdata);
if (ret)
- goto err;
+ return ret;
} else {
ihid->pdata = *platform_data;
}
@@ -1021,21 +1021,20 @@ static int i2c_hid_probe(struct i2c_client *client,
/* 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);
- if (ret != -EPROBE_DEFER)
- dev_err(&client->dev, "Failed to get regulator: %d\n",
- ret);
- goto err;
- }
+ ihid->pdata.supplies[0].supply = "vdd";
+ ihid->pdata.supplies[1].supply = "vddl";
+
+ ret = devm_regulator_bulk_get(&client->dev,
+ ARRAY_SIZE(ihid->pdata.supplies),
+ ihid->pdata.supplies);
+ if (ret)
+ return ret;
+
+ ret = regulator_bulk_enable(ARRAY_SIZE(ihid->pdata.supplies),
+ ihid->pdata.supplies);
+ if (ret < 0)
+ return ret;
- ret = regulator_enable(ihid->pdata.supply);
- if (ret < 0) {
- dev_err(&client->dev, "Failed to enable regulator: %d\n",
- ret);
- goto err;
- }
if (ihid->pdata.post_power_delay_ms)
msleep(ihid->pdata.post_power_delay_ms);
@@ -1122,11 +1121,9 @@ err_pm:
pm_runtime_disable(&client->dev);
err_regulator:
- regulator_disable(ihid->pdata.supply);
-
-err:
+ regulator_bulk_disable(ARRAY_SIZE(ihid->pdata.supplies),
+ ihid->pdata.supplies);
i2c_hid_free_buffers(ihid);
- kfree(ihid);
return ret;
}
@@ -1148,9 +1145,8 @@ static int i2c_hid_remove(struct i2c_client *client)
if (ihid->bufsize)
i2c_hid_free_buffers(ihid);
- regulator_disable(ihid->pdata.supply);
-
- kfree(ihid);
+ regulator_bulk_disable(ARRAY_SIZE(ihid->pdata.supplies),
+ ihid->pdata.supplies);
return 0;
}
@@ -1201,9 +1197,8 @@ static int i2c_hid_suspend(struct device *dev)
hid_warn(hid, "Failed to enable irq wake: %d\n",
wake_status);
} else {
- ret = regulator_disable(ihid->pdata.supply);
- if (ret < 0)
- hid_warn(hid, "Failed to disable supply: %d\n", ret);
+ regulator_bulk_disable(ARRAY_SIZE(ihid->pdata.supplies),
+ ihid->pdata.supplies);
}
return 0;
@@ -1218,9 +1213,11 @@ static int i2c_hid_resume(struct device *dev)
int wake_status;
if (!device_may_wakeup(&client->dev)) {
- ret = regulator_enable(ihid->pdata.supply);
- if (ret < 0)
- hid_warn(hid, "Failed to enable supply: %d\n", ret);
+ ret = regulator_bulk_enable(ARRAY_SIZE(ihid->pdata.supplies),
+ ihid->pdata.supplies);
+ if (ret)
+ hid_warn(hid, "Failed to enable supplies: %d\n", ret);
+
if (ihid->pdata.post_power_delay_ms)
msleep(ihid->pdata.post_power_delay_ms);
} else if (ihid->irq_wake_enabled) {
diff --git a/include/linux/platform_data/i2c-hid.h b/include/linux/platform_data/i2c-hid.h
index 1fb088239d12..c628bb5e1061 100644
--- a/include/linux/platform_data/i2c-hid.h
+++ b/include/linux/platform_data/i2c-hid.h
@@ -12,14 +12,13 @@
#ifndef __LINUX_I2C_HID_H
#define __LINUX_I2C_HID_H
+#include <linux/regulator/consumer.h>
#include <linux/types.h>
-struct regulator;
-
/**
* struct i2chid_platform_data - used by hid over i2c implementation.
* @hid_descriptor_address: i2c register where the HID descriptor is stored.
- * @supply: regulator for powering on the device.
+ * @supplies: regulators for powering on the device.
* @post_power_delay_ms: delay after powering on before device is usable.
*
* Note that it is the responsibility of the platform driver (or the acpi 5.0
@@ -35,7 +34,7 @@ struct regulator;
*/
struct i2c_hid_platform_data {
u16 hid_descriptor_address;
- struct regulator *supply;
+ struct regulator_bulk_data supplies[2];
int post_power_delay_ms;
};