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| author | Simon Glass <sjg@chromium.org> | 2020-07-07 13:11:40 -0600 |
|---|---|---|
| committer | Bin Meng <bmeng.cn@gmail.com> | 2020-07-17 14:32:24 +0800 |
| commit | 2715b3623c08bf1ad2dfe6076ad86c24e3138016 (patch) | |
| tree | 9b94a2499392579322f5c250e83b1a82b131c1f8 | |
| parent | 1361a53c1ae1f0534825e12ed41fb44aefd2c224 (diff) | |
| download | u-boot-2715b3623c08bf1ad2dfe6076ad86c24e3138016.tar.gz u-boot-2715b3623c08bf1ad2dfe6076ad86c24e3138016.tar.bz2 u-boot-2715b3623c08bf1ad2dfe6076ad86c24e3138016.zip | |
acpi: Add a way to check device status
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>
Reviewed-by: Wolfgang Wallner <wolfgang.wallner@br-automation.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
| -rw-r--r-- | include/acpi/acpi_device.h | 28 | ||||
| -rw-r--r-- | lib/acpi/acpi_device.c | 5 | ||||
| -rw-r--r-- | test/dm/acpi.c | 12 |
3 files changed, 45 insertions, 0 deletions
diff --git a/include/acpi/acpi_device.h b/include/acpi/acpi_device.h index 37a675f101..09c227489a 100644 --- a/include/acpi/acpi_device.h +++ b/include/acpi/acpi_device.h @@ -9,11 +9,28 @@ #ifndef __ACPI_DEVICE_H #define __ACPI_DEVICE_H +#include <linux/bitops.h> + 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 +58,15 @@ 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 3a9424e7ee..60f4fd8cd5 100644 --- a/lib/acpi/acpi_device.c +++ b/lib/acpi/acpi_device.c @@ -81,3 +81,8 @@ 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 5b8459311c..07b0daaab0 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); |