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iio: Allow to read mount matrix from ACPI

Bladeren bron 
Currently mount matrix is allowed in Device Tree, though there is
no technical issue to extend it to support ACPI.

Convert the function to use device_property_read_string_array() and
thus allow to read mount matrix from ACPI if available.

Example of use in _DSD method:

  Name (_DSD, Package ()
  {
     ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
     Package ()
     {
        Package () { "mount-matrix", Package() {
                "1", "0",     "0",
                "0", "0.866", "0.5",
                "0", "-0.5",  "0.866",
        } },
     }
  })

At the same time drop the "of" prefix from its name and
convert current users.

No functional change intended.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Andy Shevchenko
2019-02-21 18:02:46 +01:00
gecommit door Jonathan Cameron
bovenliggende 0a39ac29e0
commit fb1589710e
7 gewijzigde bestanden met toevoegingen van 28 en 43 verwijderingen
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4
drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
Bestand weergeven

@@ -1021,8 +1021,8 @@ int inv_mpu_core_probe(struct regmap *regmap, int irq, const char *name,
pdata = dev_get_platdata(dev);
if (!pdata) {
result = of_iio_read_mount_matrix(dev, "mount-matrix",
&st->orientation);
result = iio_read_mount_matrix(dev, "mount-matrix",
&st->orientation);
if (result) {
dev_err(dev, "Failed to retrieve mounting matrix %d\n",
result);