5.4-stable review patch. If anyone has any objections, please let me know.
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From: Julien Panis jpanis@baylibre.com
[ Upstream commit d929b2b7464f95ec01e47f560b1e687482ba8929 ]
The am335x-evm started producing boot errors because of subtle timing changes:
Unhandled fault: external abort on non-linefetch (0x1008) at 0xf03c1010 ... sysc_reset from sysc_probe+0xf60/0x1514 sysc_probe from platform_probe+0x5c/0xbc ...
The fix consists in using the appropriate sleep function in sysc reset. For flexible sleeping, fsleep is recommended. Here, sysc delay parameter can take any value in [0 - 255] us range. As a result, fsleep() should be used, calling udelay() for a sysc delay lower than 10 us.
Signed-off-by: Julien Panis jpanis@baylibre.com Fixes: e709ed70d122 ("bus: ti-sysc: Fix missing reset delay handling") Message-ID: 20230821-fix-ti-sysc-reset-v1-1-5a0a5d8fae55@baylibre.com Signed-off-by: Tony Lindgren tony@atomide.com Stable-dep-of: f71f6ff8c1f6 ("bus: ti-sysc: Flush posted write only after srst_udelay") Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/bus/ti-sysc.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c index 70339f73181ea..8d82752c54d40 100644 --- a/drivers/bus/ti-sysc.c +++ b/drivers/bus/ti-sysc.c @@ -1842,8 +1842,7 @@ static int sysc_reset(struct sysc *ddata) }
if (ddata->cfg.srst_udelay) - usleep_range(ddata->cfg.srst_udelay, - ddata->cfg.srst_udelay * 2); + fsleep(ddata->cfg.srst_udelay);
if (ddata->post_reset_quirk) ddata->post_reset_quirk(ddata);