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@@ -9,11 +9,28 @@
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#ifndef __ACPI_DEVICE_H
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#define __ACPI_DEVICE_H
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+#include <linux/bitops.h>
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+
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struct udevice;
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/* Length of a full path to an ACPI device */
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#define ACPI_PATH_MAX 30
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+/* Values that can be returned for ACPI device _STA method */
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+enum acpi_dev_status {
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+ ACPI_DSTATUS_PRESENT = BIT(0),
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+ ACPI_DSTATUS_ENABLED = BIT(1),
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+ ACPI_DSTATUS_SHOW_IN_UI = BIT(2),
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+ ACPI_DSTATUS_OK = BIT(3),
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+ ACPI_DSTATUS_HAS_BATTERY = BIT(4),
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+
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+ ACPI_DSTATUS_ALL_OFF = 0,
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+ ACPI_DSTATUS_HIDDEN_ON = ACPI_DSTATUS_PRESENT | ACPI_DSTATUS_ENABLED |
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+ ACPI_DSTATUS_OK,
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+ ACPI_DSTATUS_ALL_ON = ACPI_DSTATUS_HIDDEN_ON |
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+ ACPI_DSTATUS_SHOW_IN_UI,
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+};
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+
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/**
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* acpi_device_path() - Get the full path to an ACPI device
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*
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@@ -41,4 +58,15 @@ int acpi_device_path(const struct udevice *dev, char *buf, int maxlen);
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*/
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int acpi_device_scope(const struct udevice *dev, char *scope, int maxlen);
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+/**
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+ * acpi_device_status() - Get the status of a device
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+ *
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+ * This currently just returns ACPI_DSTATUS_ALL_ON. It does not support
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+ * inactive or hidden devices.
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+ *
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+ * @dev: Device to check
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+ * @return device status, as ACPI_DSTATUS_...
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+ */
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+enum acpi_dev_status acpi_device_status(const struct udevice *dev);
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+
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#endif
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