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author | Heinrich Schuchardt <heinrich.schuchardt@canonical.com> | 2021-09-12 21:11:46 +0200 |
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committer | Leo Yu-Chi Liang <ycliang@andestech.com> | 2021-10-07 16:08:23 +0800 |
commit | 24ed5317d427bfe278a1329abbf4522dba1025a3 (patch) | |
tree | 819a4d8ac328adbc91870b97c08e6385ec05ba6a /arch | |
parent | 09d7cc3369fcb9a6c86996ae8a58ff5dc34b3798 (diff) | |
download | u-boot-24ed5317d427bfe278a1329abbf4522dba1025a3.zip u-boot-24ed5317d427bfe278a1329abbf4522dba1025a3.tar.gz u-boot-24ed5317d427bfe278a1329abbf4522dba1025a3.tar.bz2 |
sysreset: provide SBI based sysreset driver
Provide sysreset driver using the SBI system reset extension.
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Sean Anderson <seanga2@gmail.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Samuel Holland <samuel@sholland.org>
Diffstat (limited to 'arch')
-rw-r--r-- | arch/riscv/cpu/cpu.c | 13 | ||||
-rw-r--r-- | arch/riscv/include/asm/sbi.h | 1 | ||||
-rw-r--r-- | arch/riscv/lib/sbi.c | 12 |
3 files changed, 25 insertions, 1 deletions
diff --git a/arch/riscv/cpu/cpu.c b/arch/riscv/cpu/cpu.c index c894ac1..8e49b6d 100644 --- a/arch/riscv/cpu/cpu.c +++ b/arch/riscv/cpu/cpu.c @@ -6,6 +6,7 @@ #include <common.h> #include <cpu.h> #include <dm.h> +#include <dm/lists.h> #include <init.h> #include <log.h> #include <asm/encoding.h> @@ -138,7 +139,17 @@ int arch_cpu_init_dm(void) int arch_early_init_r(void) { - return riscv_cpu_probe(); + int ret; + + ret = riscv_cpu_probe(); + if (ret) + return ret; + + if (IS_ENABLED(CONFIG_SYSRESET_SBI)) + device_bind_driver(gd->dm_root, "sbi-sysreset", + "sbi-sysreset", NULL); + + return 0; } /** diff --git a/arch/riscv/include/asm/sbi.h b/arch/riscv/include/asm/sbi.h index 34a115a..5030892 100644 --- a/arch/riscv/include/asm/sbi.h +++ b/arch/riscv/include/asm/sbi.h @@ -153,5 +153,6 @@ void sbi_set_timer(uint64_t stime_value); long sbi_get_spec_version(void); int sbi_get_impl_id(void); int sbi_probe_extension(int ext); +void sbi_srst_reset(unsigned long type, unsigned long reason); #endif diff --git a/arch/riscv/lib/sbi.c b/arch/riscv/lib/sbi.c index 77845a7..2b53896 100644 --- a/arch/riscv/lib/sbi.c +++ b/arch/riscv/lib/sbi.c @@ -108,6 +108,18 @@ int sbi_probe_extension(int extid) return -ENOTSUPP; } +/** + * sbi_srst_reset() - invoke system reset extension + * + * @type: type of reset + * @reason: reason for reset + */ +void sbi_srst_reset(unsigned long type, unsigned long reason) +{ + sbi_ecall(SBI_EXT_SRST, SBI_EXT_SRST_RESET, type, reason, + 0, 0, 0, 0); +} + #ifdef CONFIG_SBI_V01 /** |