At present U-Boot does not support the different ACPI status values, but it is best to put this logic in a central place. Add a function to get the device status.
Signed-off-by: Simon Glass sjg@chromium.org ---
Changes in v8: None Changes in v3: None Changes in v2: None
include/acpi/acpi_device.h | 26 ++++++++++++++++++++++++++ lib/acpi/acpi_device.c | 5 +++++ test/dm/acpi.c | 12 ++++++++++++ 3 files changed, 43 insertions(+)
diff --git a/include/acpi/acpi_device.h b/include/acpi/acpi_device.h index 37a675f101..1b4e3d7b5f 100644 --- a/include/acpi/acpi_device.h +++ b/include/acpi/acpi_device.h @@ -14,6 +14,21 @@ struct udevice; /* Length of a full path to an ACPI device */ #define ACPI_PATH_MAX 30
+/* Values that can be returned for ACPI device _STA method */ +enum acpi_dev_status { + ACPI_DSTATUS_PRESENT = BIT(0), + ACPI_DSTATUS_ENABLED = BIT(1), + ACPI_DSTATUS_SHOW_IN_UI = BIT(2), + ACPI_DSTATUS_OK = BIT(3), + ACPI_DSTATUS_HAS_BATTERY = BIT(4), + + ACPI_DSTATUS_ALL_OFF = 0, + ACPI_DSTATUS_HIDDEN_ON = ACPI_DSTATUS_PRESENT | ACPI_DSTATUS_ENABLED | + ACPI_DSTATUS_OK, + ACPI_DSTATUS_ALL_ON = ACPI_DSTATUS_HIDDEN_ON | + ACPI_DSTATUS_SHOW_IN_UI, +}; + /** * acpi_device_path() - Get the full path to an ACPI device * @@ -41,4 +56,15 @@ int acpi_device_path(const struct udevice *dev, char *buf, int maxlen); */ int acpi_device_scope(const struct udevice *dev, char *scope, int maxlen);
+/** + * acpi_device_status() - Get the status of a device + * + * This currently just returns ACPI_DSTATUS_ALL_ON. It does not support + * inactive or hidden devices. + * + * @dev: Device to check + * @return device status, as ACPI_DSTATUS_... + */ +enum acpi_dev_status acpi_device_status(const struct udevice *dev); + #endif diff --git a/lib/acpi/acpi_device.c b/lib/acpi/acpi_device.c index d4f7245b6c..54daf96f27 100644 --- a/lib/acpi/acpi_device.c +++ b/lib/acpi/acpi_device.c @@ -80,3 +80,8 @@ int acpi_device_scope(const struct udevice *dev, char *scope, int maxlen)
return 0; } + +enum acpi_dev_status acpi_device_status(const struct udevice *dev) +{ + return ACPI_DSTATUS_ALL_ON; +} diff --git a/test/dm/acpi.c b/test/dm/acpi.c index c25fe805c4..0c2e12d170 100644 --- a/test/dm/acpi.c +++ b/test/dm/acpi.c @@ -384,3 +384,15 @@ static int dm_test_acpi_device_path(struct unit_test_state *uts) return 0; } DM_TEST(dm_test_acpi_device_path, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT); + +/* Test acpi_device_status() */ +static int dm_test_acpi_device_status(struct unit_test_state *uts) +{ + struct udevice *dev; + + ut_assertok(uclass_first_device_err(UCLASS_TEST_ACPI, &dev)); + ut_asserteq(ACPI_DSTATUS_ALL_ON, acpi_device_status(dev)); + + return 0; +} +DM_TEST(dm_test_acpi_device_status, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);