[media] dvb-usb-dvbsky: add TechnoTrend CT2-4400 and CT2-4650 devices support

[linux-2.6-microblaze.git] / drivers / mfd / mfd-core.c

diff --git a/drivers/mfd/mfd-core.c b/drivers/mfd/mfd-core.c
index 5d0fbe1..f3338fe 100644 (file)
--- a/drivers/mfd/mfd-core.c
+++ b/drivers/mfd/mfd-core.c
@@ -78,6 +78,44 @@ static int mfd_platform_add_cell(struct platform_device *pdev,
        return 0;
 }
 
+#if IS_ENABLED(CONFIG_ACPI)
+static void mfd_acpi_add_device(const struct mfd_cell *cell,
+                               struct platform_device *pdev)
+{
+       struct acpi_device *parent_adev;
+       struct acpi_device *adev;
+
+       parent_adev = ACPI_COMPANION(pdev->dev.parent);
+       if (!parent_adev)
+               return;
+
+       /*
+        * MFD child device gets its ACPI handle either from the ACPI
+        * device directly under the parent that matches the acpi_pnpid or
+        * it will use the parent handle if is no acpi_pnpid is given.
+        */
+       adev = parent_adev;
+       if (cell->acpi_pnpid) {
+               struct acpi_device_id ids[2] = {};
+               struct acpi_device *child_adev;
+
+               strlcpy(ids[0].id, cell->acpi_pnpid, sizeof(ids[0].id));
+               list_for_each_entry(child_adev, &parent_adev->children, node)
+                       if (acpi_match_device_ids(child_adev, ids)) {
+                               adev = child_adev;
+                               break;
+                       }
+       }
+
+       ACPI_COMPANION_SET(&pdev->dev, adev);
+}
+#else
+static inline void mfd_acpi_add_device(const struct mfd_cell *cell,
+                                      struct platform_device *pdev)
+{
+}
+#endif
+
 static int mfd_add_device(struct device *parent, int id,
                          const struct mfd_cell *cell, atomic_t *usage_count,
                          struct resource *mem_base,
@@ -119,6 +157,8 @@ static int mfd_add_device(struct device *parent, int id,
                }
        }
 
+       mfd_acpi_add_device(cell, pdev);
+
        if (cell->pdata_size) {
                ret = platform_device_add_data(pdev,
                                        cell->platform_data, cell->pdata_size);