Add a function to write a scope to the generated ACPI code.
Signed-off-by: Simon Glass sjg@chromium.org Reviewed-by: Wolfgang Wallner wolfgang.wallner@br-automation.com ---
Changes in v2: - Rename parameter from 'name' to 'scope'
include/acpi/acpigen.h | 9 +++++++++ lib/acpi/acpigen.c | 7 +++++++ test/dm/acpi.c | 3 +-- test/dm/acpigen.c | 30 ++++++++++++++++++++++++++++++ 4 files changed, 47 insertions(+), 2 deletions(-)
diff --git a/include/acpi/acpigen.h b/include/acpi/acpigen.h index c6644bc2b2..4a606125de 100644 --- a/include/acpi/acpigen.h +++ b/include/acpi/acpigen.h @@ -31,6 +31,7 @@ enum { DWORD_PREFIX = 0x0c, STRING_PREFIX = 0x0d, QWORD_PREFIX = 0x0e, + SCOPE_OP = 0x10, BUFFER_OP = 0x11, PACKAGE_OP = 0x12, METHOD_OP = 0x14, @@ -261,6 +262,14 @@ void acpigen_emit_namestring(struct acpi_ctx *ctx, const char *namepath); */ void acpigen_write_name(struct acpi_ctx *ctx, const char *namepath);
+/** + * acpigen_write_scope() - Write a scope + * + * @ctx: ACPI context pointer + * @scope: Scope to write (e.g. "\_SB.ABCD") + */ +void acpigen_write_scope(struct acpi_ctx *ctx, const char *scope); + /** * acpigen_write_uuid() - Write a UUID * diff --git a/lib/acpi/acpigen.c b/lib/acpi/acpigen.c index 45216c1f9d..1e0a489d7b 100644 --- a/lib/acpi/acpigen.c +++ b/lib/acpi/acpigen.c @@ -258,6 +258,13 @@ void acpigen_write_name(struct acpi_ctx *ctx, const char *namepath) acpigen_emit_namestring(ctx, namepath); }
+void acpigen_write_scope(struct acpi_ctx *ctx, const char *scope) +{ + acpigen_emit_byte(ctx, SCOPE_OP); + acpigen_write_len_f(ctx); + acpigen_emit_namestring(ctx, scope); +} + static void acpigen_write_method_internal(struct acpi_ctx *ctx, const char *name, uint flags) { diff --git a/test/dm/acpi.c b/test/dm/acpi.c index 7768f9514c..b94c4ba4d1 100644 --- a/test/dm/acpi.c +++ b/test/dm/acpi.c @@ -20,9 +20,8 @@ #include <dm/acpi.h> #include <dm/test.h> #include <test/ut.h> +#include "acpi.h"
-#define ACPI_TEST_DEV_NAME "ABCD" -#define ACPI_TEST_CHILD_NAME "EFGH" #define BUF_SIZE 4096
/** diff --git a/test/dm/acpigen.c b/test/dm/acpigen.c index 167a014553..1031185b96 100644 --- a/test/dm/acpigen.c +++ b/test/dm/acpigen.c @@ -917,3 +917,33 @@ static int dm_test_acpi_write_values(struct unit_test_state *uts) } DM_TEST(dm_test_acpi_write_values, 0);
+/* Test writing a scope */ +static int dm_test_acpi_scope(struct unit_test_state *uts) +{ + char buf[ACPI_PATH_MAX]; + struct acpi_ctx *ctx; + struct udevice *dev; + u8 *ptr; + + ut_assertok(alloc_context(&ctx)); + ptr = acpigen_get_current(ctx); + + ut_assertok(uclass_first_device_err(UCLASS_TEST_ACPI, &dev)); + ut_assertok(acpi_device_path(dev, buf, sizeof(buf))); + acpigen_write_scope(ctx, buf); + acpigen_pop_len(ctx); + + ut_asserteq(SCOPE_OP, *ptr++); + ut_asserteq(13, get_length(ptr)); + ptr += 3; + ut_asserteq(ROOT_PREFIX, *ptr++); + ut_asserteq(DUAL_NAME_PREFIX, *ptr++); + ut_asserteq_strn("_SB_" ACPI_TEST_DEV_NAME, (char *)ptr); + ptr += 8; + ut_asserteq_ptr(ptr, ctx->current); + + free_context(&ctx); + + return 0; +} +DM_TEST(dm_test_acpi_scope, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);