[PATCH v5 4/4] i2c: allow specify device properties in i2c_board_info

[Dmitry Torokhov]

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.torok...@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