Merge branch 'acpi-uid'

Merge ACPI _UID handling unification changes for 6.1-rc1:

 - Introduce acpi_dev_uid_to_integer() to convert a _UID string into an
   integer value (Andy Shevchenko).

 - Use acpi_dev_uid_to_integer() in several places to unify _UID
   handling (Andy Shevchenko).

* acpi-uid:
  efi/dev-path-parser: Refactor _UID handling to use acpi_dev_uid_to_integer()
  spi: pxa2xx: Refactor _UID handling to use acpi_dev_uid_to_integer()
  perf: qcom_l2_pmu: Refactor _UID handling to use acpi_dev_uid_to_integer()
  i2c: mlxbf: Refactor _UID handling to use acpi_dev_uid_to_integer()
  i2c: amd-mp2-plat: Refactor _UID handling to use acpi_dev_uid_to_integer()
  ACPI: x86: Refactor _UID handling to use acpi_dev_uid_to_integer()
  ACPI: LPSS: Refactor _UID handling to use acpi_dev_uid_to_integer()
  ACPI: utils: Add acpi_dev_uid_to_integer() helper to get _UID as integer

3 files changed, 41 insertions, 12 deletions

diff --git a/drivers/acpi/acpi_lpss.c b/drivers/acpi/acpi_lpss.c
index 7a73528aa9c2..f08ffa75f4a7 100644
--- a/drivers/acpi/acpi_lpss.c
+++ b/drivers/acpi/acpi_lpss.c
@@ -167,10 +167,10 @@ static struct pwm_lookup byt_pwm_lookup[] = {
 
 static void byt_pwm_setup(struct lpss_private_data *pdata)
 {
-	struct acpi_device *adev = pdata->adev;
+	u64 uid;
 
 	/* Only call pwm_add_table for the first PWM controller */
-	if (!adev->pnp.unique_id || strcmp(adev->pnp.unique_id, "1"))
+	if (acpi_dev_uid_to_integer(pdata->adev, &uid) || uid != 1)
 		return;
 
 	pwm_add_table(byt_pwm_lookup, ARRAY_SIZE(byt_pwm_lookup));
@@ -180,14 +180,13 @@ static void byt_pwm_setup(struct lpss_private_data *pdata)
 
 static void byt_i2c_setup(struct lpss_private_data *pdata)
 {
-	const char *uid_str = acpi_device_uid(pdata->adev);
 	acpi_handle handle = pdata->adev->handle;
 	unsigned long long shared_host = 0;
 	acpi_status status;
-	long uid = 0;
+	u64 uid;
 
-	/* Expected to always be true, but better safe then sorry */
-	if (uid_str && !kstrtol(uid_str, 10, &uid) && uid) {
+	/* Expected to always be successfull, but better safe then sorry */
+	if (!acpi_dev_uid_to_integer(pdata->adev, &uid) && uid) {
 		/* Detect I2C bus shared with PUNIT and ignore its d3 status */
 		status = acpi_evaluate_integer(handle, "_SEM", NULL, &shared_host);
 		if (ACPI_SUCCESS(status) && shared_host)
@@ -211,10 +210,10 @@ static struct pwm_lookup bsw_pwm_lookup[] = {
 
 static void bsw_pwm_setup(struct lpss_private_data *pdata)
 {
-	struct acpi_device *adev = pdata->adev;
+	u64 uid;
 
 	/* Only call pwm_add_table for the first PWM controller */
-	if (!adev->pnp.unique_id || strcmp(adev->pnp.unique_id, "1"))
+	if (acpi_dev_uid_to_integer(pdata->adev, &uid) || uid != 1)
 		return;
 
 	pwm_add_table(bsw_pwm_lookup, ARRAY_SIZE(bsw_pwm_lookup));
diff --git a/drivers/acpi/utils.c b/drivers/acpi/utils.c
index 4acd6f7d1395..2ea14648a661 100644
--- a/drivers/acpi/utils.c
+++ b/drivers/acpi/utils.c
@@ -794,6 +794,30 @@ bool acpi_dev_hid_uid_match(struct acpi_device *adev,
 EXPORT_SYMBOL(acpi_dev_hid_uid_match);
 
 /**
+ * acpi_dev_uid_to_integer - treat ACPI device _UID as integer
+ * @adev: ACPI device to get _UID from
+ * @integer: output buffer for integer
+ *
+ * Considers _UID as integer and converts it to @integer.
+ *
+ * Returns 0 on success, or negative error code otherwise.
+ */
+int acpi_dev_uid_to_integer(struct acpi_device *adev, u64 *integer)
+{
+	const char *uid;
+
+	if (!adev)
+		return -ENODEV;
+
+	uid = acpi_device_uid(adev);
+	if (!uid)
+		return -ENODATA;
+
+	return kstrtou64(uid, 0, integer);
+}
+EXPORT_SYMBOL(acpi_dev_uid_to_integer);
+
+/**
  * acpi_dev_found - Detect presence of a given ACPI device in the namespace.
  * @hid: Hardware ID of the device.
  *
diff --git a/drivers/acpi/x86/utils.c b/drivers/acpi/x86/utils.c
index d7cdd8406c84..f8a2cbdc0ce2 100644
--- a/drivers/acpi/x86/utils.c
+++ b/drivers/acpi/x86/utils.c
@@ -368,11 +368,17 @@ int acpi_quirk_skip_serdev_enumeration(struct device *controller_parent, bool *s
 	struct acpi_device *adev = ACPI_COMPANION(controller_parent);
 	const struct dmi_system_id *dmi_id;
 	long quirks = 0;
+	u64 uid;
+	int ret;
 
 	*skip = false;
 
-	/* !dev_is_platform() to not match on PNP enumerated debug UARTs */
-	if (!adev || !adev->pnp.unique_id || !dev_is_platform(controller_parent))
+	ret = acpi_dev_uid_to_integer(adev, &uid);
+	if (ret)
+		return 0;
+
+	/* to not match on PNP enumerated debug UARTs */
+	if (!dev_is_platform(controller_parent))
 		return 0;
 
 	dmi_id = dmi_first_match(acpi_quirk_skip_dmi_ids);
@@ -380,10 +386,10 @@ int acpi_quirk_skip_serdev_enumeration(struct device *controller_parent, bool *s
 		quirks = (unsigned long)dmi_id->driver_data;
 
 	if (quirks & ACPI_QUIRK_UART1_TTY_UART2_SKIP) {
-		if (!strcmp(adev->pnp.unique_id, "1"))
+		if (uid == 1)
 			return -ENODEV; /* Create tty cdev instead of serdev */
 
-		if (!strcmp(adev->pnp.unique_id, "2"))
+		if (uid == 2)
 			*skip = true;
 	}