[PATCH v2 4/4] i2c: allow specify device properties in i2c_board_info

Dmitry Torokhov
2017-02-01T02:11:37Z

With many drivers converting to using generic device properties, it is
useful to provide array of device properties when instantiating new i2c
client via i2c_board_info and have them automatically added to the device
in question.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
drivers/i2c/i2c-core.c | 16 +++++++++++++++-
include/linux/i2c.h | 3 +++
2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index f009549f86a5..3897e78e5e9a 100644
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -1335,15 +1335,29 @@ i2c_new_device(struct i2c_adapter *adap, struct i2c_board_info const *info)
client->dev.fwnode = info->fwnode;

i2c_dev_set_name(adap, client);
+
+ if (info->properties) {
+ status = device_add_properties(&client->dev, info->properties);
+ if (status) {
+ dev_err(&adap->dev,
+ "Failed to add properties to client %s: %d\n",
+ client->name, status);
+ goto out_err;
+ }
+ }
+
status = device_register(&client->dev);
if (status)
- goto out_err;
+ goto out_free_props;

dev_dbg(&adap->dev, "client [%s] registered with bus id %s\n",
client->name, dev_name(&client->dev));

return client;

+out_free_props:
+ if (info->properties)
+ device_remove_properties(&client->dev);
out_err:
dev_err(&adap->dev,
"Failed to register i2c client %s at 0x%02x (%d)\n",
diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index 4aa7d244b38a..ec8f866a5656 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -51,6 +51,7 @@ enum i2c_slave_event;
typedef int (*i2c_slave_cb_t)(struct i2c_client *, enum i2c_slave_event, u8 *);

struct module;
+struct property_entry;

#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
/*
@@ -310,6 +311,7 @@ static inline int i2c_slave_event(struct i2c_client *client,
* @archdata: copied into i2c_client.dev.archdata
* @of_node: pointer to OpenFirmware device node
* @fwnode: device node supplied by the platform firmware
+ * @properties: additional device properties for the device
* @irq: stored in i2c_client.irq
*
* I2C doesn't actually support hardware probing, although controllers and
@@ -331,6 +333,7 @@ struct i2c_board_info {
struct dev_archdata *archdata;
struct device_node *of_node;
struct fwnode_handle *fwnode;
+ const struct property_entry *properties;
int irq;
};

--
2.11.0.483.g087da7b7c-goog