i2c: mlxbf: Refactor _UID handling to use acpi_dev_uid_to_integer()

ACPI utils provide acpi_dev_uid_to_integer() helper to extract _UID as
an integer. Use it instead of custom approach.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Wolfram Sang <wsa@kernel.org>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/i2c/busses/i2c-mlxbf.c b/drivers/i2c/busses/i2c-mlxbf.c
index 8716032..32235c6 100644 (file)
--- a/drivers/i2c/busses/i2c-mlxbf.c
+++ b/drivers/i2c/busses/i2c-mlxbf.c
@@ -2229,35 +2229,27 @@ MODULE_DEVICE_TABLE(acpi, mlxbf_i2c_acpi_ids);
 static int mlxbf_i2c_acpi_probe(struct device *dev, struct mlxbf_i2c_priv *priv)
 {
        const struct acpi_device_id *aid;
-       struct acpi_device *adev;
-       unsigned long bus_id = 0;
-       const char *uid;
+       u64 bus_id;
        int ret;
 
        if (acpi_disabled)
                return -ENOENT;
 
-       adev = ACPI_COMPANION(dev);
-       if (!adev)
-               return -ENXIO;
-
        aid = acpi_match_device(mlxbf_i2c_acpi_ids, dev);
        if (!aid)
                return -ENODEV;
 
        priv->chip = (struct mlxbf_i2c_chip_info *)aid->driver_data;
 
-       uid = acpi_device_uid(adev);
-       if (!uid || !(*uid)) {
+       ret = acpi_dev_uid_to_integer(ACPI_COMPANION(dev), &bus_id);
+       if (ret) {
                dev_err(dev, "Cannot retrieve UID\n");
-               return -ENODEV;
+               return ret;
        }
 
-       ret = kstrtoul(uid, 0, &bus_id);
-       if (!ret)
-               priv->bus = bus_id;
+       priv->bus = bus_id;
 
-       return ret;
+       return 0;
 }
 #else
 static int mlxbf_i2c_acpi_probe(struct device *dev, struct mlxbf_i2c_priv *priv)