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acpi: Support generation of a device

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Allow writing an ACPI device to the generated ACPI code.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Wolfgang Wallner <wolfgang.wallner@br-automation.com>
[bmeng: Fix build failures on Sandbox]
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Simon Glass 2020-07-07 21:32:14 -06:00 committed by Bin Meng
parent 70303d2480
commit 91c2f9c32e
3 changed files with 43 additions and 0 deletions
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9
include/acpi/acpigen.h
View File

@ -56,6 +56,7 @@ enum {
AND_OP = 0x7b, AND_OP = 0x7b,
OR_OP = 0x7d, OR_OP = 0x7d,
NOT_OP = 0x80, NOT_OP = 0x80,
DEVICE_OP = 0x82,
POWER_RES_OP = 0x84, POWER_RES_OP = 0x84,
RETURN_OP = 0xa4, RETURN_OP = 0xa4,
}; };
@ -313,6 +314,14 @@ void acpigen_write_method(struct acpi_ctx *ctx, const char *name, int nargs);
void acpigen_write_method_serialized(struct acpi_ctx *ctx, const char *name, void acpigen_write_method_serialized(struct acpi_ctx *ctx, const char *name,
int nargs); int nargs);
/**
* acpigen_write_device() - Write an ACPI device
*
* @ctx: ACPI context pointer
* @name: Device name to write
*/
void acpigen_write_device(struct acpi_ctx *ctx, const char *name);
/** /**
* acpigen_write_sta() - Write a _STA method * acpigen_write_sta() - Write a _STA method
* *

7
lib/acpi/acpigen.c
View File

@ -291,6 +291,13 @@ void acpigen_write_method_serialized(struct acpi_ctx *ctx, const char *name,
ACPI_METHOD_SERIALIZED_MASK); ACPI_METHOD_SERIALIZED_MASK);
} }
void acpigen_write_device(struct acpi_ctx *ctx, const char *name)
{
acpigen_emit_ext_op(ctx, DEVICE_OP);
acpigen_write_len_f(ctx);
acpigen_emit_namestring(ctx, name);
}
void acpigen_write_sta(struct acpi_ctx *ctx, uint status) void acpigen_write_sta(struct acpi_ctx *ctx, uint status)
{ {
/* Method (_STA, 0, NotSerialized) { Return (status) } */ /* Method (_STA, 0, NotSerialized) { Return (status) } */

27
test/dm/acpigen.c
View File

@ -993,3 +993,30 @@ static int dm_test_acpi_resource_template(struct unit_test_state *uts)
return 0; return 0;
} }
DM_TEST(dm_test_acpi_resource_template, 0); DM_TEST(dm_test_acpi_resource_template, 0);
/* Test writing a device */
static int dm_test_acpi_device(struct unit_test_state *uts)
{
struct acpi_ctx *ctx;
u8 *ptr;
ut_assertok(alloc_context(&ctx));
ptr = acpigen_get_current(ctx);
acpigen_write_device(ctx, "\\_SB." ACPI_TEST_DEV_NAME);
acpigen_pop_len(ctx);
ut_asserteq(EXT_OP_PREFIX, *ptr++);
ut_asserteq(DEVICE_OP, *ptr++);
ut_asserteq(0xd, acpi_test_get_length(ptr));
ptr += 3;
ut_asserteq(ROOT_PREFIX, *ptr++);
ut_asserteq(DUAL_NAME_PREFIX, *ptr++);
ptr += 8;
ut_asserteq_ptr(ptr, ctx->current);
free_context(&ctx);
return 0;
}
DM_TEST(dm_test_acpi_device, 0);