linux-kernel - [PATCH v2 1/7] acpi: utils: move acpi_lpss

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Date:   Mon, 18 Jan 2021 00:34:22 +0000
From:   Daniel Scally <djrscally@...il.com>
To:     linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org,
        linux-gpio@...r.kernel.org, linux-i2c@...r.kernel.org,
        platform-driver-x86@...r.kernel.org, devel@...ica.org
Cc:     rjw@...ysocki.net, lenb@...nel.org, andy@...nel.org,
        mika.westerberg@...ux.intel.com, linus.walleij@...aro.org,
        bgolaszewski@...libre.com, wsa@...nel.org, lee.jones@...aro.org,
        hdegoede@...hat.com, mgross@...ux.intel.com,
        robert.moore@...el.com, erik.kaneda@...el.com,
        sakari.ailus@...ux.intel.com, andriy.shevchenko@...ux.intel.com,
        laurent.pinchart@...asonboard.com, kieran.bingham@...asonboard.com
Subject: [PATCH v2 1/7] acpi: utils: move acpi_lpss_dep() to utils

I need to be able to identify devices which declare themselves to be
dependent on other devices through _DEP; add this function to utils.c
and export it to the rest of the ACPI layer.

Suggested-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Signed-off-by: Daniel Scally <djrscally@...il.com>
---
Changes in v2:
	- Introduced

 drivers/acpi/acpi_lpss.c | 24 ------------------------
 drivers/acpi/internal.h  |  1 +
 drivers/acpi/utils.c     | 24 ++++++++++++++++++++++++
 3 files changed, 25 insertions(+), 24 deletions(-)

diff --git a/drivers/acpi/acpi_lpss.c b/drivers/acpi/acpi_lpss.c
index be73974ce449..70c7d9a3f715 100644
--- a/drivers/acpi/acpi_lpss.c
+++ b/drivers/acpi/acpi_lpss.c
@@ -543,30 +543,6 @@ static struct device *acpi_lpss_find_device(const char *hid, const char *uid)
 	return bus_find_device(&pci_bus_type, NULL, &data, match_hid_uid);
 }
 
-static bool acpi_lpss_dep(struct acpi_device *adev, acpi_handle handle)
-{
-	struct acpi_handle_list dep_devices;
-	acpi_status status;
-	int i;
-
-	if (!acpi_has_method(adev->handle, "_DEP"))
-		return false;
-
-	status = acpi_evaluate_reference(adev->handle, "_DEP", NULL,
-					 &dep_devices);
-	if (ACPI_FAILURE(status)) {
-		dev_dbg(&adev->dev, "Failed to evaluate _DEP.\n");
-		return false;
-	}
-
-	for (i = 0; i < dep_devices.count; i++) {
-		if (dep_devices.handles[i] == handle)
-			return true;
-	}
-
-	return false;
-}
-
 static void acpi_lpss_link_consumer(struct device *dev1,
 				    const struct lpss_device_links *link)
 {
diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h
index cb229e24c563..ee62c0973576 100644
--- a/drivers/acpi/internal.h
+++ b/drivers/acpi/internal.h
@@ -79,6 +79,7 @@ static inline void acpi_lpss_init(void) {}
 #endif
 
 void acpi_apd_init(void);
+bool acpi_lpss_dep(struct acpi_device *adev, acpi_handle handle);
 
 acpi_status acpi_hotplug_schedule(struct acpi_device *adev, u32 src);
 bool acpi_queue_hotplug_work(struct work_struct *work);
diff --git a/drivers/acpi/utils.c b/drivers/acpi/utils.c
index ddca1550cce6..78b38775f18b 100644
--- a/drivers/acpi/utils.c
+++ b/drivers/acpi/utils.c
@@ -807,6 +807,30 @@ static int acpi_dev_match_cb(struct device *dev, const void *data)
 	return hrv == match->hrv;
 }
 
+bool acpi_lpss_dep(struct acpi_device *adev, acpi_handle handle)
+{
+	struct acpi_handle_list dep_devices;
+	acpi_status status;
+	int i;
+
+	if (!acpi_has_method(adev->handle, "_DEP"))
+		return false;
+
+	status = acpi_evaluate_reference(adev->handle, "_DEP", NULL,
+					 &dep_devices);
+	if (ACPI_FAILURE(status)) {
+		dev_dbg(&adev->dev, "Failed to evaluate _DEP.\n");
+		return false;
+	}
+
+	for (i = 0; i < dep_devices.count; i++) {
+		if (dep_devices.handles[i] == handle)
+			return true;
+	}
+
+	return false;
+}
+
 /**
  * acpi_dev_present - Detect that a given ACPI device is present
  * @hid: Hardware ID of the device.
-- 
2.25.1