| Message ID | 20230607165738.138357-1-biju.das.jz@bp.renesas.com (mailing list archive) |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
| Series | [v4] i2c: Add i2c_get_match_data() | expand |
On Wed, Jun 07, 2023 at 05:57:38PM +0100, Biju Das wrote: > Add i2c_get_match_data() to get match data for I2C, ACPI and > DT-based matching, so that we can optimize the driver code. > > Suggested-by: Geert Uytterhoeven <geert+renesas@glider.be> > Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com> No further comments, yet I like it, so: Applied to for-next, thanks! With one minor change, I hope you are okay with it: > + struct device_driver *drv = client->dev.driver; > + struct i2c_driver *driver = to_i2c_driver(drv); Variables 'drv' and 'driver' sounds like it could cause confusion later. I merged the two and eliminated 'drv' that way.
Hi Wolfram Sang, > Subject: Re: [PATCH v4] i2c: Add i2c_get_match_data() > > On Wed, Jun 07, 2023 at 05:57:38PM +0100, Biju Das wrote: > > Add i2c_get_match_data() to get match data for I2C, ACPI and DT-based > > matching, so that we can optimize the driver code. > > > > Suggested-by: Geert Uytterhoeven <geert+renesas@glider.be> > > Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com> > > No further comments, yet I like it, so: > > Applied to for-next, thanks! > > With one minor change, I hope you are okay with it: > > > + struct device_driver *drv = client->dev.driver; > > + struct i2c_driver *driver = to_i2c_driver(drv); > > Variables 'drv' and 'driver' sounds like it could cause confusion later. > I merged the two and eliminated 'drv' that way. Yes, it is much better. Cheers, Biju
diff --git a/drivers/i2c/i2c-core-base.c b/drivers/i2c/i2c-core-base.c index ae3af738b03f..040544b2ced4 100644 --- a/drivers/i2c/i2c-core-base.c +++ b/drivers/i2c/i2c-core-base.c @@ -114,6 +114,26 @@ const struct i2c_device_id *i2c_match_id(const struct i2c_device_id *id, } EXPORT_SYMBOL_GPL(i2c_match_id); +const void *i2c_get_match_data(const struct i2c_client *client) +{ + struct device_driver *drv = client->dev.driver; + struct i2c_driver *driver = to_i2c_driver(drv); + const struct i2c_device_id *match; + const void *data; + + data = device_get_match_data(&client->dev); + if (!data) { + match = i2c_match_id(driver->id_table, client); + if (!match) + return NULL; + + data = (const void *)match->driver_data; + } + + return data; +} +EXPORT_SYMBOL(i2c_get_match_data); + static int i2c_device_match(struct device *dev, struct device_driver *drv) { struct i2c_client *client = i2c_verify_client(dev); diff --git a/include/linux/i2c.h b/include/linux/i2c.h index 13a1ce38cb0c..3430cc2b05a6 100644 --- a/include/linux/i2c.h +++ b/include/linux/i2c.h @@ -367,6 +367,8 @@ struct i2c_adapter *i2c_verify_adapter(struct device *dev); const struct i2c_device_id *i2c_match_id(const struct i2c_device_id *id, const struct i2c_client *client); +const void *i2c_get_match_data(const struct i2c_client *client); + static inline struct i2c_client *kobj_to_i2c_client(struct kobject *kobj) { struct device * const dev = kobj_to_dev(kobj);
Add i2c_get_match_data() to get match data for I2C, ACPI and DT-based matching, so that we can optimize the driver code. Suggested-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com> --- v3->v4: * Added support for ACPI matching as well by replacing of_device_ get_match_data->device_get_match_data. * Removed Rb tag from Geert as there is change in logic. v2->v3: * Added support for getting match data for both I2C and DT-based matching. * Added Rb tag from Geert and retained the Rb tag as change is trivial. v1->v2: * Dropped parameter const struct i2c_device_id *id and the helper function. eg: The RTC pcf85063/isl1208 driver code can be optimized with this patch. - if (client->dev.of_node) { - config = of_device_get_match_data(&client->dev); - if (!config) - return -ENODEV; - } else { - enum pcf85063_type type = - i2c_match_id(pcf85063_ids, client)->driver_data; - if (type >= PCF85063_LAST_ID) - return -ENODEV; - config = &pcf85063_cfg[type]; - } + config = i2c_get_match_data(client); + if (!config) + return -ENODEV; similar case exists for adding I2C match support for the below clock drivers along with already supported OF/ACPI based matching. https://elixir.bootlin.com/linux/latest/source/drivers/clk/clk-renesas-pcie.c#L282 https://elixir.bootlin.com/linux/latest/source/drivers/clk/clk-versaclock5.c#L956 https://elixir.bootlin.com/linux/latest/source/drivers/clk/clk-versaclock7.c#L1111 --- drivers/i2c/i2c-core-base.c | 20 ++++++++++++++++++++ include/linux/i2c.h | 2 ++ 2 files changed, 22 insertions(+)