A 'Power Resource for Wake' list the resources a device depends on for wake. Add a function to generate this.
Signed-off-by: Simon Glass sjg@chromium.org ---
Changes in v4: - Correct comment for dm_test_acpi_write_prw()
include/acpi/acpigen.h | 10 ++++++++++ lib/acpi/acpigen.c | 10 ++++++++++ test/dm/acpigen.c | 30 ++++++++++++++++++++++++++++++ 3 files changed, 50 insertions(+)
diff --git a/include/acpi/acpigen.h b/include/acpi/acpigen.h index 228ac9c404b..a9b70123c0a 100644 --- a/include/acpi/acpigen.h +++ b/include/acpi/acpigen.h @@ -563,4 +563,14 @@ int acpigen_set_enable_tx_gpio(struct acpi_ctx *ctx, u32 tx_state_val, const char *dw0_read, const char *dw0_write, struct acpi_gpio *gpio, bool enable);
+/** + * acpigen_write_prw() - Write a power resource for wake (_PRW) + * + * @ctx: ACPI context pointer + * @wake: GPE that wakes up the device + * @level: Deepest power system sleeping state that can be entered while still + * providing wake functionality + */ +void acpigen_write_prw(struct acpi_ctx *ctx, uint wake, uint level); + #endif diff --git a/lib/acpi/acpigen.c b/lib/acpi/acpigen.c index c609ef4daa4..527de89b1e1 100644 --- a/lib/acpi/acpigen.c +++ b/lib/acpi/acpigen.c @@ -426,6 +426,16 @@ void acpigen_write_register_resource(struct acpi_ctx *ctx, acpigen_write_resourcetemplate_footer(ctx); }
+void acpigen_write_prw(struct acpi_ctx *ctx, uint wake, uint level) +{ + /* Name (_PRW, Package () { wake, level } */ + acpigen_write_name(ctx, "_PRW"); + acpigen_write_package(ctx, 2); + acpigen_write_integer(ctx, wake); + acpigen_write_integer(ctx, level); + acpigen_pop_len(ctx); +} + /* * ToUUID(uuid) * diff --git a/test/dm/acpigen.c b/test/dm/acpigen.c index 1b2767e732d..1dc064ffbcf 100644 --- a/test/dm/acpigen.c +++ b/test/dm/acpigen.c @@ -1097,3 +1097,33 @@ static int dm_test_acpi_write_name(struct unit_test_state *uts) return 0; } DM_TEST(dm_test_acpi_write_name, 0); + +/* Test emitting a _PRW component */ +static int dm_test_acpi_write_prw(struct unit_test_state *uts) +{ + struct acpi_ctx *ctx; + u8 *ptr; + + ut_assertok(alloc_context(&ctx)); + + ptr = acpigen_get_current(ctx); + acpigen_write_prw(ctx, 5, 3); + ut_asserteq(NAME_OP, *ptr++); + + ut_asserteq_strn("_PRW", (char *)ptr); + ptr += 4; + ut_asserteq(PACKAGE_OP, *ptr++); + ut_asserteq(8, acpi_test_get_length(ptr)); + ptr += 3; + ut_asserteq(2, *ptr++); + ut_asserteq(BYTE_PREFIX, *ptr++); + ut_asserteq(5, *ptr++); + ut_asserteq(BYTE_PREFIX, *ptr++); + ut_asserteq(3, *ptr++); + ut_asserteq_ptr(ptr, ctx->current); + + free_context(&ctx); + + return 0; +} +DM_TEST(dm_test_acpi_write_prw, 0);