diff mbox series

LoongArch: Enable PG when wakeup from suspend

Message ID 20230411094959.3368451-1-chenhuacai@loongson.cn
State New
Headers
Series LoongArch: Enable PG when wakeup from suspend |

Commit Message

Huacai Chen April 11, 2023, 9:49 a.m. UTC 
  Some firmwares don't enable PG when wakeup from suspend, so do it in
kernel. This can improve code compatibility for boot kernel.

Signed-off-by: Baoqi Zhang <zhangbaoqi@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
---
 arch/loongarch/power/suspend_asm.S | 4 ++++
 1 file changed, 4 insertions(+)
diff mbox series

Patch

diff --git a/arch/loongarch/power/suspend_asm.S b/arch/loongarch/power/suspend_asm.S
index 90da899c06a1..e2fc3b4e31f0 100644
--- a/arch/loongarch/power/suspend_asm.S
+++ b/arch/loongarch/power/suspend_asm.S
@@ -80,6 +80,10 @@  SYM_INNER_LABEL(loongarch_wakeup_start, SYM_L_GLOBAL)
 
 	JUMP_VIRT_ADDR	t0, t1
 
+	/* Enable PG */
+	li.w		t0, 0xb0		# PLV=0, IE=0, PG=1
+	csrwr		t0, LOONGARCH_CSR_CRMD
+
 	la.pcrel	t0, acpi_saved_sp
 	ld.d		sp, t0, 0
 	SETUP_WAKEUP