[PATCH v2 01/16] pinctrl: intel: Introduce intel_pinctrl_probe_by_uid() internal API

[Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>]

Introduce intel_pinctrl_probe_by_uid() internal API to simplify drivers,
which are using ACPI _UID to distinguish which SoC data needs to be used
when being probed.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
---
 drivers/pinctrl/intel/pinctrl-intel.c | 38 +++++++++++++++++++++++++++
 drivers/pinctrl/intel/pinctrl-intel.h |  2 ++
 2 files changed, 40 insertions(+)

diff --git a/drivers/pinctrl/intel/pinctrl-intel.c b/drivers/pinctrl/intel/pinctrl-intel.c
index a356a5b8bab2..ea2cc0a72b67 100644
--- a/drivers/pinctrl/intel/pinctrl-intel.c
+++ b/drivers/pinctrl/intel/pinctrl-intel.c
@@ -7,11 +7,14 @@
  *          Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>
  */
 
+#include <linux/acpi.h>
 #include <linux/module.h>
 #include <linux/interrupt.h>
 #include <linux/gpio/driver.h>
 #include <linux/log2.h>
 #include <linux/platform_device.h>
+#include <linux/property.h>
+
 #include <linux/pinctrl/pinctrl.h>
 #include <linux/pinctrl/pinmux.h>
 #include <linux/pinctrl/pinconf.h>
@@ -1415,6 +1418,41 @@ int intel_pinctrl_probe(struct platform_device *pdev,
 }
 EXPORT_SYMBOL_GPL(intel_pinctrl_probe);
 
+int intel_pinctrl_probe_by_uid(struct platform_device *pdev)
+{
+	const struct intel_pinctrl_soc_data *data = NULL;
+	const struct intel_pinctrl_soc_data **table;
+	struct acpi_device *adev;
+	unsigned int i;
+
+	adev = ACPI_COMPANION(&pdev->dev);
+	if (adev) {
+		const void *match = device_get_match_data(&pdev->dev);
+
+		table = (const struct intel_pinctrl_soc_data **)match;
+		for (i = 0; table[i]; i++) {
+			if (!strcmp(adev->pnp.unique_id, table[i]->uid)) {
+				data = table[i];
+				break;
+			}
+		}
+	} else {
+		const struct platform_device_id *id;
+
+		id = platform_get_device_id(pdev);
+		if (!id)
+			return -ENODEV;
+
+		table = (const struct intel_pinctrl_soc_data **)id->driver_data;
+		data = table[pdev->id];
+	}
+	if (!data)
+		return -ENODEV;
+
+	return intel_pinctrl_probe(pdev, data);
+}
+EXPORT_SYMBOL_GPL(intel_pinctrl_probe_by_uid);
+
 #ifdef CONFIG_PM_SLEEP
 static bool intel_pinctrl_should_save(struct intel_pinctrl *pctrl, unsigned pin)
 {
diff --git a/drivers/pinctrl/intel/pinctrl-intel.h b/drivers/pinctrl/intel/pinctrl-intel.h
index 1785abf157e4..05eaed257cf0 100644
--- a/drivers/pinctrl/intel/pinctrl-intel.h
+++ b/drivers/pinctrl/intel/pinctrl-intel.h
@@ -173,6 +173,8 @@ struct intel_pinctrl_soc_data {
 
 int intel_pinctrl_probe(struct platform_device *pdev,
 			const struct intel_pinctrl_soc_data *soc_data);
+int intel_pinctrl_probe_by_uid(struct platform_device *pdev);
+
 #ifdef CONFIG_PM_SLEEP
 int intel_pinctrl_suspend(struct device *dev);
 int intel_pinctrl_resume(struct device *dev);
-- 
2.18.0