diff options
| author | Hans de Goede <hdegoede@redhat.com> | 2024-04-25 14:57:51 +0200 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2024-04-29 21:53:25 +0200 |
| commit | 02eae0bb9538dc7dcb5a6bc2c3066bd6ca682969 (patch) | |
| tree | 846f3cf6ea9f218f0589d969c666add1fa4b7f6f /include | |
| parent | iio: buffer: initialize masklength accumulator to 0 (diff) | |
| download | linux-02eae0bb9538dc7dcb5a6bc2c3066bd6ca682969.tar.xz linux-02eae0bb9538dc7dcb5a6bc2c3066bd6ca682969.zip | |
iio: core: Add iio_read_acpi_mount_matrix() helper function
The ACPI "ROTM" rotation matrix parsing code atm is already duplicated
between bmc150-accel-core.c and kxcjk-1013.c and a third user of this
is coming.
Add an iio_read_acpi_mount_matrix() helper function for this.
The 2 existing copies of the code are identical, except that
the kxcjk-1013.c has slightly better error logging.
To new helper is a 1:1 copy of the kxcjk-1013.c version, the only change
is the addition of a "char *acpi_method" parameter since some bmc150
dual-accel setups (360° hinges with 1 accel in kbd/base + 1 in display)
declare both accels in a single ACPI device with 2 different method names
for the 2 matrices. This new acpi_method parameter is not "const char *"
because the pathname parameter to acpi_evaluate_object() is not const.
The 2 existing copies of this function will be removed in further patches
in this series.
Acked-by: Rafael J. Wysocki <rafael@kernel.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20240425125754.76010-2-hdegoede@redhat.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/iio/iio.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h index e370a7bb3300..55e2b22086a1 100644 --- a/include/linux/iio/iio.h +++ b/include/linux/iio/iio.h @@ -788,6 +788,19 @@ static inline struct dentry *iio_get_debugfs_dentry(struct iio_dev *indio_dev) } #endif +#ifdef CONFIG_ACPI +bool iio_read_acpi_mount_matrix(struct device *dev, + struct iio_mount_matrix *orientation, + char *acpi_method); +#else +static inline bool iio_read_acpi_mount_matrix(struct device *dev, + struct iio_mount_matrix *orientation, + char *acpi_method) +{ + return false; +} +#endif + ssize_t iio_format_value(char *buf, unsigned int type, int size, int *vals); int iio_str_to_fixpoint(const char *str, int fract_mult, int *integer, |