diff options
| author | Anup Patel <anup.patel@wdc.com> | 2022-02-10 11:19:40 +0530 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2022-03-10 09:29:21 -0800 |
| commit | f6e64b66629e8fff0997825ade06619f09a06583 (patch) | |
| tree | 7f054cbebc4b84847e99a1aed50a84d70f5531fc /arch/riscv/include/asm/cpuidle.h | |
| parent | e783362eb54cd99b2cac8b3a9aeac942e6f6ac07 (diff) | |
| download | linux-f6e64b66629e8fff0997825ade06619f09a06583.tar.gz | |
RISC-V: Enable CPU_IDLE drivers
We force select CPU_PM and provide asm/cpuidle.h so that we can
use CPU IDLE drivers for Linux RISC-V kernel.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
Signed-off-by: Anup Patel <apatel@vetanamicro.com>
Reviewed-by: Guo Ren <guoren@kernel.org>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'arch/riscv/include/asm/cpuidle.h')
| -rw-r--r-- | arch/riscv/include/asm/cpuidle.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/arch/riscv/include/asm/cpuidle.h b/arch/riscv/include/asm/cpuidle.h new file mode 100644 index 000000000000..71fdc607d4bc --- /dev/null +++ b/arch/riscv/include/asm/cpuidle.h @@ -0,0 +1,24 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2021 Allwinner Ltd + * Copyright (C) 2021 Western Digital Corporation or its affiliates. + */ + +#ifndef _ASM_RISCV_CPUIDLE_H +#define _ASM_RISCV_CPUIDLE_H + +#include <asm/barrier.h> +#include <asm/processor.h> + +static inline void cpu_do_idle(void) +{ + /* + * Add mb() here to ensure that all + * IO/MEM accesses are completed prior + * to entering WFI. + */ + mb(); + wait_for_interrupt(); +} + +#endif |