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author | Icenowy Zheng <icenowy@sipeed.com> | 2021-07-22 09:32:57 +0800 |
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committer | Icenowy Zheng <icenowy@aosc.io> | 2021-08-25 00:15:27 +0800 |
commit | 86a7429e477786dad6fab002538aef825f4ca35a (patch) | |
tree | 894dd3226d13487400be81558d070d6d42b22733 /plat | |
parent | 9fcefe38d54bdfd86648248854944d95bb99a92a (diff) | |
download | trusted-firmware-a-86a7429e477786dad6fab002538aef825f4ca35a.tar.gz |
fix(plat/allwinner): delay after enabling CPU power
Adds a 1us delay after enabling power to a CPU core, to prevent
inrush-caused CPU crash before it's up.
Change-Id: I8f4c1b0dc0d1d976b31ddc30efe7a77a1619b1b3
Signed-off-by: Icenowy Zheng <icenowy@sipeed.com>
Diffstat (limited to 'plat')
-rw-r--r-- | plat/allwinner/common/sunxi_cpu_ops.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/plat/allwinner/common/sunxi_cpu_ops.c b/plat/allwinner/common/sunxi_cpu_ops.c index 420b507abe..8a29dbbd58 100644 --- a/plat/allwinner/common/sunxi_cpu_ops.c +++ b/plat/allwinner/common/sunxi_cpu_ops.c @@ -42,6 +42,7 @@ static void sunxi_cpu_enable_power(unsigned int cluster, unsigned int core) mmio_write_32(SUNXI_CPU_POWER_CLAMP_REG(cluster, core), 0xe0); mmio_write_32(SUNXI_CPU_POWER_CLAMP_REG(cluster, core), 0x80); mmio_write_32(SUNXI_CPU_POWER_CLAMP_REG(cluster, core), 0x00); + udelay(1); } /* We can't turn ourself off like this, but it works for other cores. */ |