[PATCH] riscv: acpi: update FADT revision check to 6.6

[rom.wang]

From: Yufeng Wang <wangyufeng at kylinos.cn>

ACPI 6.6 is required for RISC-V as it introduces RISC-V specific
tables such as RHCT (RISC-V Hart Capabilities Table) and
RIMT (RISC-V I/O Mapping Table).

Update the FADT revision check from 6.5 to 6.6 and remove
the TODO comment since ACPI 6.6 has been officially released.

Signed-off-by: Yufeng Wang <wangyufeng at kylinos.cn>
---
 arch/riscv/kernel/acpi.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/arch/riscv/kernel/acpi.c b/arch/riscv/kernel/acpi.c
index 71698ee11621..ff681db9f4f1 100644
--- a/arch/riscv/kernel/acpi.c
+++ b/arch/riscv/kernel/acpi.c
@@ -85,12 +85,12 @@ static int __init acpi_fadt_sanity_check(void)
 	 * The revision in the table header is the FADT's Major revision. The
 	 * FADT also has a minor revision, which is stored in the FADT itself.
 	 *
-	 * TODO: Currently, we check for 6.5 as the minimum version to check
-	 * for HW_REDUCED flag. However, once RISC-V updates are released in
-	 * the ACPI spec, we need to update this check for exact minor revision
+	 * ACPI 6.6 is required for RISC-V as it introduces RISC-V specific
+	 * tables such as RHCT (RISC-V Hart Capabilities Table) and RIMT
+	 * (RISC-V I/O Mapping Table).
 	 */
-	if (table->revision < 6 || (table->revision == 6 && fadt->minor_revision < 5))
-		pr_err(FW_BUG "Unsupported FADT revision %d.%d, should be 6.5+\n",
+	if (table->revision < 6 || (table->revision == 6 && fadt->minor_revision < 6))
+		pr_err(FW_BUG "Unsupported FADT revision %d.%d, should be 6.6+\n",
 		       table->revision, fadt->minor_revision);
 
 	if (!(fadt->flags & ACPI_FADT_HW_REDUCED)) {
-- 
2.34.1