diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/dm/acpi.h | 73 | ||||
| -rw-r--r-- | include/dm/device.h | 5 | ||||
| -rw-r--r-- | include/log.h | 2 |
3 files changed, 80 insertions, 0 deletions
diff --git a/include/dm/acpi.h b/include/dm/acpi.h new file mode 100644 index 0000000000..ba0813fa21 --- /dev/null +++ b/include/dm/acpi.h @@ -0,0 +1,73 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Core ACPI (Advanced Configuration and Power Interface) support + * + * Copyright 2019 Google LLC + * Written by Simon Glass <sjg@chromium.org> + */ + +#ifndef __DM_ACPI_H__ +#define __DM_ACPI_H__ + +/* Allow operations to be optional for ACPI */ +#if CONFIG_IS_ENABLED(ACPIGEN) +#define ACPI_OPS_PTR(_ptr) .acpi_ops = _ptr, +#else +#define ACPI_OPS_PTR(_ptr) +#endif + +/* Length of an ACPI name string, excluding nul terminator */ +#define ACPI_NAME_LEN 4 + +/* Length of an ACPI name string including nul terminator */ +#define ACPI_NAME_MAX (ACPI_NAME_LEN + 1) + +/** + * struct acpi_ops - ACPI operations supported by driver model + */ +struct acpi_ops { + /** + * get_name() - Obtain the ACPI name of a device + * + * @dev: Device to check + * @out_name: Place to put the name, must hold at least ACPI_NAME_MAX + * bytes + * @return 0 if OK, -ENOENT if no name is available, other -ve value on + * other error + */ + int (*get_name)(const struct udevice *dev, char *out_name); +}; + +#define device_get_acpi_ops(dev) ((dev)->driver->acpi_ops) + +/** + * acpi_get_name() - Obtain the ACPI name of a device + * + * @dev: Device to check + * @out_name: Place to put the name, must hold at least ACPI_NAME_MAX + * bytes + * @return 0 if OK, -ENOENT if no name is available, other -ve value on + * other error + */ +int acpi_get_name(const struct udevice *dev, char *out_name); + +/** + * acpi_copy_name() - Copy an ACPI name to an output buffer + * + * This convenience function can be used to return a literal string as a name + * in functions that implement the get_name() method. + * + * For example: + * + * static int mydev_get_name(const struct udevice *dev, char *out_name) + * { + * return acpi_copy_name(out_name, "WIBB"); + * } + * + * @out_name: Place to put the name + * @name: Name to copy + * @return 0 (always) + */ +int acpi_copy_name(char *out_name, const char *name); + +#endif diff --git a/include/dm/device.h b/include/dm/device.h index a56164b19b..35e19d8700 100644 --- a/include/dm/device.h +++ b/include/dm/device.h @@ -245,6 +245,8 @@ struct udevice_id { * pointers defined by the driver, to implement driver functions required by * the uclass. * @flags: driver flags - see DM_FLAGS_... + * @acpi_ops: Advanced Configuration and Power Interface (ACPI) operations, + * allowing the device to add things to the ACPI tables passed to Linux */ struct driver { char *name; @@ -264,6 +266,9 @@ struct driver { int per_child_platdata_auto_alloc_size; const void *ops; /* driver-specific operations */ uint32_t flags; +#if CONFIG_IS_ENABLED(ACPIGEN) + struct acpi_ops *acpi_ops; +#endif }; /* Declare a new U-Boot driver */ diff --git a/include/log.h b/include/log.h index 62fb8afbd0..fbcbd42fb4 100644 --- a/include/log.h +++ b/include/log.h @@ -51,6 +51,8 @@ enum log_category_t { LOGC_SANDBOX, /* Related to the sandbox board */ LOGC_BLOBLIST, /* Bloblist */ LOGC_DEVRES, /* Device resources (devres_... functions) */ + /* Advanced Configuration and Power Interface (ACPI) */ + LOGC_ACPI, LOGC_COUNT, /* Number of log categories */ LOGC_END, /* Sentinel value for a list of log categories */ |