From: Jonathan Cameron <jic23@kernel.org>
To: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Hartmut Knaack <knaack.h@gmx.de>,
Lars-Peter Clausen <lars@metafoo.de>,
Peter Meerwald-Stadler <pmeerw@pmeerw.net>,
linux-iio@vger.kernel.org,
Linus Walleij <linus.walleij@linaro.org>,
"H. Nikolaus Schaller" <hns@goldelico.com>
Subject: Re: [PATCH v2] iio: Allow to read mount matrix from ACPI
Date: Wed, 20 Feb 2019 18:31:28 +0000 [thread overview]
Message-ID: <20190220183128.4ff6f950@archlinux> (raw)
In-Reply-To: <20190220175441.31455-1-andriy.shevchenko@linux.intel.com>
On Wed, 20 Feb 2019 20:54:41 +0300
Andy Shevchenko <andriy.shevchenko@linux.intel.com> wrote:
> 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>
You got a stray white space. I'll fix up.
Would like this to sit for a few days though before I take it.
We have missed this merge window anyway so no rush.
Jonathan
> ---
>
> - added _DSD example
> - fixed indentation
>
> drivers/iio/accel/kxsd9.c | 4 +-
> drivers/iio/gyro/mpu3050-core.c | 3 +-
> drivers/iio/imu/inv_mpu6050/inv_mpu_core.c | 4 +-
> drivers/iio/industrialio-core.c | 46 +++++++++-------------
> drivers/iio/magnetometer/ak8974.c | 5 +--
> drivers/iio/magnetometer/ak8975.c | 5 +--
> include/linux/iio/iio.h | 4 +-
> 7 files changed, 28 insertions(+), 43 deletions(-)
>
> diff --git a/drivers/iio/accel/kxsd9.c b/drivers/iio/accel/kxsd9.c
> index 0c0df4fce420..70c60db62247 100644
> --- a/drivers/iio/accel/kxsd9.c
> +++ b/drivers/iio/accel/kxsd9.c
> @@ -420,9 +420,7 @@ int kxsd9_common_probe(struct device *dev,
> indio_dev->available_scan_masks = kxsd9_scan_masks;
>
> /* Read the mounting matrix, if present */
> - ret = of_iio_read_mount_matrix(dev,
> - "mount-matrix",
> - &st->orientation);
> + ret = iio_read_mount_matrix(dev, "mount-matrix", &st->orientation);
> if (ret)
> return ret;
>
> diff --git a/drivers/iio/gyro/mpu3050-core.c b/drivers/iio/gyro/mpu3050-core.c
> index 77fac81a3adc..8200e48f561b 100644
> --- a/drivers/iio/gyro/mpu3050-core.c
> +++ b/drivers/iio/gyro/mpu3050-core.c
> @@ -1149,8 +1149,7 @@ int mpu3050_common_probe(struct device *dev,
> mpu3050->divisor = 99;
>
> /* Read the mounting matrix, if present */
> - ret = of_iio_read_mount_matrix(dev, "mount-matrix",
> - &mpu3050->orientation);
> + ret = iio_read_mount_matrix(dev, "mount-matrix", &mpu3050->orientation);
> if (ret)
> return ret;
>
> diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
> index 1e428c196a82..533d1f8321ac 100644
> --- a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
> +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
> @@ -990,8 +990,8 @@ 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);
> diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
> index 4f5cd9f60870..3baede140d69 100644
> --- a/drivers/iio/industrialio-core.c
> +++ b/drivers/iio/industrialio-core.c
> @@ -19,6 +19,7 @@
> #include <linux/device.h>
> #include <linux/fs.h>
> #include <linux/poll.h>
> +#include <linux/property.h>
> #include <linux/sched.h>
> #include <linux/wait.h>
> #include <linux/cdev.h>
> @@ -525,8 +526,8 @@ ssize_t iio_show_mount_matrix(struct iio_dev *indio_dev, uintptr_t priv,
> EXPORT_SYMBOL_GPL(iio_show_mount_matrix);
>
> /**
> - * of_iio_read_mount_matrix() - retrieve iio device mounting matrix from
> - * device-tree "mount-matrix" property
> + * iio_read_mount_matrix() - retrieve iio device mounting matrix from
> + * device "mount-matrix" property
> * @dev: device the mounting matrix property is assigned to
> * @propname: device specific mounting matrix property name
> * @matrix: where to store retrieved matrix
> @@ -536,40 +537,29 @@ EXPORT_SYMBOL_GPL(iio_show_mount_matrix);
> *
> * Return: 0 if success, or a negative error code on failure.
> */
> -#ifdef CONFIG_OF
> -int of_iio_read_mount_matrix(const struct device *dev,
> - const char *propname,
> - struct iio_mount_matrix *matrix)
> +int iio_read_mount_matrix(struct device *dev, const char *propname,
> + struct iio_mount_matrix *matrix)
> {
> - if (dev->of_node) {
> - int err = of_property_read_string_array(dev->of_node,
> - propname, matrix->rotation,
> - ARRAY_SIZE(iio_mount_idmatrix.rotation));
> + size_t len = ARRAY_SIZE(iio_mount_idmatrix.rotation);
Space at end of line above.
> + int err;
>
> - if (err == ARRAY_SIZE(iio_mount_idmatrix.rotation))
> - return 0;
> + err = device_property_read_string_array(dev, propname,
> + matrix->rotation, len);
> + if (err == len)
> + return 0;
>
> - if (err >= 0)
> - /* Invalid number of matrix entries. */
> - return -EINVAL;
> + if (err >= 0)
> + /* Invalid number of matrix entries. */
> + return -EINVAL;
>
> - if (err != -EINVAL)
> - /* Invalid matrix declaration format. */
> - return err;
> - }
> + if (err != -EINVAL)
> + /* Invalid matrix declaration format. */
> + return err;
>
> /* Matrix was not declared at all: fallback to identity. */
> return iio_setup_mount_idmatrix(dev, matrix);
> }
> -#else
> -int of_iio_read_mount_matrix(const struct device *dev,
> - const char *propname,
> - struct iio_mount_matrix *matrix)
> -{
> - return iio_setup_mount_idmatrix(dev, matrix);
> -}
> -#endif
> -EXPORT_SYMBOL(of_iio_read_mount_matrix);
> +EXPORT_SYMBOL(iio_read_mount_matrix);
>
> static ssize_t __iio_format_value(char *buf, size_t len, unsigned int type,
> int size, const int *vals)
> diff --git a/drivers/iio/magnetometer/ak8974.c b/drivers/iio/magnetometer/ak8974.c
> index 93be1f4c0f27..f4d0a6c0fde7 100644
> --- a/drivers/iio/magnetometer/ak8974.c
> +++ b/drivers/iio/magnetometer/ak8974.c
> @@ -733,9 +733,8 @@ static int ak8974_probe(struct i2c_client *i2c,
> ak8974->i2c = i2c;
> mutex_init(&ak8974->lock);
>
> - ret = of_iio_read_mount_matrix(&i2c->dev,
> - "mount-matrix",
> - &ak8974->orientation);
> + ret = iio_read_mount_matrix(&i2c->dev, "mount-matrix",
> + &ak8974->orientation);
> if (ret)
> return ret;
>
> diff --git a/drivers/iio/magnetometer/ak8975.c b/drivers/iio/magnetometer/ak8975.c
> index d430b80808ef..db7214ac514c 100644
> --- a/drivers/iio/magnetometer/ak8975.c
> +++ b/drivers/iio/magnetometer/ak8975.c
> @@ -911,9 +911,8 @@ static int ak8975_probe(struct i2c_client *client,
> data->eoc_irq = 0;
>
> if (!pdata) {
> - err = of_iio_read_mount_matrix(&client->dev,
> - "mount-matrix",
> - &data->orientation);
> + err = iio_read_mount_matrix(&client->dev, "mount-matrix",
> + &data->orientation);
> if (err)
> return err;
> } else
> diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h
> index a74cb177dc6f..bb10c1bee301 100644
> --- a/include/linux/iio/iio.h
> +++ b/include/linux/iio/iio.h
> @@ -130,8 +130,8 @@ struct iio_mount_matrix {
>
> ssize_t iio_show_mount_matrix(struct iio_dev *indio_dev, uintptr_t priv,
> const struct iio_chan_spec *chan, char *buf);
> -int of_iio_read_mount_matrix(const struct device *dev, const char *propname,
> - struct iio_mount_matrix *matrix);
> +int iio_read_mount_matrix(struct device *dev, const char *propname,
> + struct iio_mount_matrix *matrix);
>
> typedef const struct iio_mount_matrix *
> (iio_get_mount_matrix_t)(const struct iio_dev *indio_dev,
next prev parent reply other threads:[~2019-02-20 18:31 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-20 17:54 [PATCH v2] iio: Allow to read mount matrix from ACPI Andy Shevchenko
2019-02-20 18:31 ` Jonathan Cameron [this message]
2019-02-21 11:37 ` Andy Shevchenko
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