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spi: Introduce spi_get_device_match_data() helper

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[ Upstream commit aea672d054a21782ed8450c75febb6ba3c208ca4 ]

The proposed spi_get_device_match_data() helper is for retrieving
a driver data associated with the ID in an ID table. First, it tries
to get driver data of the device enumerated by firmware interface
(usually Device Tree or ACPI). If none is found it falls back to
the SPI ID table matching.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20221020195421.10482-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Stable-dep-of: ee4d79055aee ("iio: imu: adis16475: add spi_device_id table")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Andy Shevchenko 2022-10-20 22:54:21 +03:00 committed by Greg Kroah-Hartman
parent 457a219c84
commit 027eaeaf32
2 changed files with 15 additions and 0 deletions
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12
drivers/spi/spi.c
View File

@ -360,6 +360,18 @@ const struct spi_device_id *spi_get_device_id(const struct spi_device *sdev)
}
EXPORT_SYMBOL_GPL(spi_get_device_id);
const void *spi_get_device_match_data(const struct spi_device *sdev)
{
const void *match;
match = device_get_match_data(&sdev->dev);
if (match)
return match;
return (const void *)spi_get_device_id(sdev)->driver_data;
}
EXPORT_SYMBOL_GPL(spi_get_device_match_data);
static int spi_match_device(struct device *dev, struct device_driver *drv)
{
const struct spi_device *spi = to_spi_device(dev);

3
include/linux/spi/spi.h
View File

@ -1515,6 +1515,9 @@ extern void spi_unregister_device(struct spi_device *spi);
extern const struct spi_device_id *
spi_get_device_id(const struct spi_device *sdev);
extern const void *
spi_get_device_match_data(const struct spi_device *sdev);
static inline bool
spi_transfer_is_last(struct spi_controller *ctlr, struct spi_transfer *xfer)
{