Messages in this thread | | | From | "Rafael J. Wysocki" <> | Subject | Re: [PATCH 7/7] OF/ACPI/I2C: Add generic match function for the aforementioned systems | Date | Wed, 04 Jun 2014 14:37:42 +0200 |
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On Wednesday, June 04, 2014 01:09:56 PM Lee Jones wrote: > Currently this is a helper function for the I2C subsystem to aid the > matching of non-standard compatible strings and devices which use DT > and/or ACPI, but do not supply any nodes (see: [1] Method 4). However, > it has been made more generic as it can be used to only make one call > for drivers which support any mixture of OF, ACPI and/or I2C matching. > > The initial aim is for of_match_device() to be replaced by this call > in all I2C device drivers. > > [1] Documentation/i2c/instantiating-devices > > Signed-off-by: Lee Jones <lee.jones@linaro.org>
Mika, can you please have a look at this, please?
> --- > include/linux/match.h | 40 ++++++++++++++++++++++++++++++++++++++++ > 1 file changed, 40 insertions(+) > create mode 100644 include/linux/match.h > > diff --git a/include/linux/match.h b/include/linux/match.h > new file mode 100644 > index 0000000..20a08e2 > --- /dev/null > +++ b/include/linux/match.h > @@ -0,0 +1,40 @@ > +#include <linux/of.h> > +#include <linux/acpi.h> > +#include <linux/i2c.h> > + > +static void *device_match(struct device *dev) > +{ > + struct device_driver *driver = dev->driver; > + > + if (!driver) > + return NULL; > + > + /* Attempt an OF style match */ > + if (IS_ENABLED(CONFIG_OF)) { > + const struct of_device_id *of_match = > + i2c_of_match_device(driver->of_match_table, dev); > + if (of_match) > + return (void *)of_match; > + } > + > + /* Then ACPI style match */ > + if (IS_ENABLED(CONFIG_ACPI)) { > + const struct acpi_device_id *acpi_match = > + acpi_match_device(driver->acpi_match_table, dev); > + if (acpi_match) > + return (void *)acpi_match; > + } > + > + /* Finally an I2C match */ > + if (IS_ENABLED(CONFIG_I2C)) { > + struct i2c_client *client = i2c_verify_client(dev); > + struct i2c_driver *i2c_drv = to_i2c_driver(driver); > + struct i2c_device_id *i2c_match; > + > + i2c_match = i2c_match_id(i2c_drv->id_table, client); > + if (i2c_match) > + return (void *)i2c_match; > + } > + > + return NULL; > +} >
-- I speak only for myself. Rafael J. Wysocki, Intel Open Source Technology Center.
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