From: Ben Zong-You Xie <ben717@andestech.com>
To: <opensbi@lists.infradead.org>
Subject: [PATCH 4/7] lib: utils/suspend: restore Andes CSRs on system-suspend resume
Date: Tue, 28 Jul 2026 16:10:38 +0800 [thread overview]
Message-ID: <20260728081041.2724668-5-ben717@andestech.com> (raw)
In-Reply-To: <20260728081041.2724668-1-ben717@andestech.com>
A deep sleep resume leaves the boot hart in SUSPENDED state, so
init_warmboot() dispatches to init_warm_resume(), which calls the SUSP
device's system_resume callback and not sbi_platform_early_init(). The
restore in ae350_early_init() is dead code on that path.
Fixes: b27ecec76b8a ("lib: utils/suspend: add Andes ATCSMU suspend driver")
Signed-off-by: Ben Zong-You Xie <ben717@andestech.com>
---
lib/utils/suspend/fdt_suspend_andes_atcsmu.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/lib/utils/suspend/fdt_suspend_andes_atcsmu.c b/lib/utils/suspend/fdt_suspend_andes_atcsmu.c
index 072accc031a0..6722b70f0e6e 100644
--- a/lib/utils/suspend/fdt_suspend_andes_atcsmu.c
+++ b/lib/utils/suspend/fdt_suspend_andes_atcsmu.c
@@ -91,8 +91,10 @@ static void ae350_system_resume(void)
u32 hartid = current_hartid();
u32 sleep_type = atcsmu_get_sleep_type(hartid);
- if (sleep_type == SBI_SUSP_SLEEP_TYPE_SUSPEND)
+ if (sleep_type == SBI_SUSP_SLEEP_TYPE_SUSPEND) {
fdt_cmo_llc_enable(true);
+ ae350_non_ret_restore(sbi_scratch_thishart_ptr());
+ }
}
static struct sbi_system_suspend_device suspend_andes_atcsmu = {
--
2.34.1
--
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next prev parent reply other threads:[~2026-07-28 8:11 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-28 8:10 [PATCH 0/7] Fix and improve the Andes ATCSMU and LLC drivers Ben Zong-You Xie
2026-07-28 8:10 ` [PATCH 1/7] lib: utils/cache: fix andes_llcache_enable() return value Ben Zong-You Xie
2026-07-28 8:10 ` [PATCH 2/7] lib: utils/andes: add the SMU and LLC registers to the root domain Ben Zong-You Xie
2026-07-28 8:10 ` [PATCH 3/7] platform: generic/andes: pair non-retentive CSR save/restore with a flag Ben Zong-You Xie
2026-07-28 8:10 ` Ben Zong-You Xie [this message]
2026-07-28 8:10 ` [PATCH 5/7] lib: utils/hsm: wake sleeping Andes harts with an IPI Ben Zong-You Xie
2026-07-28 8:10 ` [PATCH 6/7] lib: utils/suspend: wait for the secondary Andes harts to sleep Ben Zong-You Xie
2026-07-28 8:10 ` [PATCH 7/7] lib: utils/andes: arm the SMU sleep command last Ben Zong-You Xie
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