From: Dave Jiang <dave.jiang@intel.com>

KEYP ACPI table can be parsed using the common fw_table handlers. Add
additional support to detect and parse the table.

Co-developed-by: Xu Yilun <yilun.xu@linux.intel.com>
Signed-off-by: Xu Yilun <yilun.xu@linux.intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>
---
 include/linux/acpi.h     |  3 +++
 include/linux/fw_table.h |  1 +
 drivers/acpi/tables.c    | 12 +++++++++++-
 lib/fw_table.c           |  9 +++++++++
 4 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index 4d2f0bed7a06..e5b51bd46600 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -247,6 +247,9 @@ int acpi_table_parse_madt(enum acpi_madt_type id,
 int __init_or_acpilib
 acpi_table_parse_cedt(enum acpi_cedt_type id,
 		      acpi_tbl_entry_handler_arg handler_arg, void *arg);
+int __init_or_acpilib
+acpi_table_parse_keyp(enum acpi_keyp_type id,
+		      acpi_tbl_entry_handler_arg handler_arg, void *arg);
 
 int acpi_parse_mcfg (struct acpi_table_header *header);
 void acpi_table_print_madt_entry (struct acpi_subtable_header *madt);
diff --git a/include/linux/fw_table.h b/include/linux/fw_table.h
index 9bd605b87c4c..293252cb0b7e 100644
--- a/include/linux/fw_table.h
+++ b/include/linux/fw_table.h
@@ -36,6 +36,7 @@ union acpi_subtable_headers {
 	struct acpi_prmt_module_header prmt;
 	struct acpi_cedt_header cedt;
 	struct acpi_cdat_header cdat;
+	struct acpi_keyp_common_header keyp;
 };
 
 int acpi_parse_entries_array(char *id, unsigned long table_size,
diff --git a/drivers/acpi/tables.c b/drivers/acpi/tables.c
index 4286e4af1092..8dc60632faf3 100644
--- a/drivers/acpi/tables.c
+++ b/drivers/acpi/tables.c
@@ -299,6 +299,16 @@ acpi_table_parse_cedt(enum acpi_cedt_type id,
 }
 EXPORT_SYMBOL_ACPI_LIB(acpi_table_parse_cedt);
 
+int __init_or_acpilib
+acpi_table_parse_keyp(enum acpi_keyp_type id,
+		      acpi_tbl_entry_handler_arg handler_arg, void *arg)
+{
+	return __acpi_table_parse_entries(ACPI_SIG_KEYP,
+					  sizeof(struct acpi_table_keyp), id,
+					  NULL, handler_arg, arg, 0);
+}
+EXPORT_SYMBOL_ACPI_LIB(acpi_table_parse_keyp);
+
 int __init acpi_table_parse_entries(char *id, unsigned long table_size,
 				    int entry_id,
 				    acpi_tbl_entry_handler handler,
@@ -408,7 +418,7 @@ static const char table_sigs[][ACPI_NAMESEG_SIZE] __nonstring_array __initconst
 	ACPI_SIG_PSDT, ACPI_SIG_RSDT, ACPI_SIG_XSDT, ACPI_SIG_SSDT,
 	ACPI_SIG_IORT, ACPI_SIG_NFIT, ACPI_SIG_HMAT, ACPI_SIG_PPTT,
 	ACPI_SIG_NHLT, ACPI_SIG_AEST, ACPI_SIG_CEDT, ACPI_SIG_AGDI,
-	ACPI_SIG_NBFT, ACPI_SIG_SWFT, ACPI_SIG_MPAM};
+	ACPI_SIG_NBFT, ACPI_SIG_SWFT, ACPI_SIG_MPAM, ACPI_SIG_KEYP};
 
 #define ACPI_HEADER_SIZE sizeof(struct acpi_table_header)
 
diff --git a/lib/fw_table.c b/lib/fw_table.c
index 16291814450e..147e3895e94c 100644
--- a/lib/fw_table.c
+++ b/lib/fw_table.c
@@ -20,6 +20,7 @@ enum acpi_subtable_type {
 	ACPI_SUBTABLE_PRMT,
 	ACPI_SUBTABLE_CEDT,
 	CDAT_SUBTABLE,
+	ACPI_SUBTABLE_KEYP,
 };
 
 struct acpi_subtable_entry {
@@ -41,6 +42,8 @@ acpi_get_entry_type(struct acpi_subtable_entry *entry)
 		return entry->hdr->cedt.type;
 	case CDAT_SUBTABLE:
 		return entry->hdr->cdat.type;
+	case ACPI_SUBTABLE_KEYP:
+		return entry->hdr->keyp.type;
 	}
 	return 0;
 }
@@ -61,6 +64,8 @@ acpi_get_entry_length(struct acpi_subtable_entry *entry)
 		__le16 length = (__force __le16)entry->hdr->cdat.length;
 
 		return le16_to_cpu(length);
+	case ACPI_SUBTABLE_KEYP:
+		return entry->hdr->keyp.length;
 	}
 	}
 	return 0;
@@ -80,6 +85,8 @@ acpi_get_subtable_header_length(struct acpi_subtable_entry *entry)
 		return sizeof(entry->hdr->cedt);
 	case CDAT_SUBTABLE:
 		return sizeof(entry->hdr->cdat);
+	case ACPI_SUBTABLE_KEYP:
+		return sizeof(entry->hdr->keyp);
 	}
 	return 0;
 }
@@ -95,6 +102,8 @@ acpi_get_subtable_type(char *id)
 		return ACPI_SUBTABLE_CEDT;
 	if (strncmp(id, ACPI_SIG_CDAT, 4) == 0)
 		return CDAT_SUBTABLE;
+	if (strncmp(id, ACPI_SIG_KEYP, 4) == 0)
+		return ACPI_SUBTABLE_KEYP;
 	return ACPI_SUBTABLE_COMMON;
 }
 
-- 
2.25.1