diff options
| author | Simon Glass <sjg@chromium.org> | 2020-07-07 13:12:00 -0600 |
|---|---|---|
| committer | Bin Meng <bmeng.cn@gmail.com> | 2020-07-17 14:32:24 +0800 |
| commit | f9189d5ada8d48932463dc1d56ea4d44c050ebbd (patch) | |
| tree | ac8c5c634ce28b5f31a35ab4586163df375d1ab9 /include/acpi | |
| parent | 9c70e7e556339ce9fa864782445f7927fafc5c03 (diff) | |
acpi: Add support for writing a Power Resource
These are used in ACPI to disable power to various pats of the system when
in sleep. Add a way to create a power resource, with the caller finishing
off the details.
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>
Diffstat (limited to 'include/acpi')
| -rw-r--r-- | include/acpi/acpigen.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/include/acpi/acpigen.h b/include/acpi/acpigen.h index 2dd806aa27..2c07a56208 100644 --- a/include/acpi/acpigen.h +++ b/include/acpi/acpigen.h @@ -51,6 +51,7 @@ enum { AND_OP = 0x7b, OR_OP = 0x7d, NOT_OP = 0x80, + POWER_RES_OP = 0x84, RETURN_OP = 0xa4, }; @@ -321,4 +322,25 @@ void acpigen_write_and(struct acpi_ctx *ctx, u8 arg1, u8 arg2, u8 res); */ void acpigen_write_not(struct acpi_ctx *ctx, u8 arg, u8 res); +/** + * acpigen_write_power_res() - Write a power resource + * + * Name (_PRx, Package(One) { name }) + * ... + * PowerResource (name, level, order) + * + * The caller should fill in the rest of the power resource and then call + * acpigen_pop_len() to close it off + * + * @ctx: ACPI context pointer + * @name: Name of power resource (e.g. "PRIC") + * @level: Deepest sleep level that this resource must be kept on (0=S0, 3=S3) + * @order: Order that this must be enabled/disabled (e.g. 0) + * @dev_stats: List of states to define, e.g. {"_PR0", "_PR3"} + * @dev_states_count: Number of dev states + */ +void acpigen_write_power_res(struct acpi_ctx *ctx, const char *name, uint level, + uint order, const char *const dev_states[], + size_t dev_states_count); + #endif |