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arm: dra7xx: Fix error path in iodelay recalibration

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When an error is reported in __recalibrate_iodelay_start(), de-isolation
of IO doesn't happen. Because of this, undefined behaviour is observed
on many peripherals without any error. So make sure io is out of isolation
at the end of iodelay recalibration.

Reported-by: Richard Woodruff <r-woodruff2@ti.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
This commit is contained in:
Lokesh Vutla 2019-10-01 10:41:00 +05:30 committed by Tom Rini
parent 2fff0e96a6
commit 60e3d43a26
1 changed files with 3 additions and 2 deletions
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5
arch/arm/mach-omap2/omap5/dra7xx_iodelay.c
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@ -202,8 +202,9 @@ void __recalibrate_iodelay_end(int ret)
return;
}
if (!ret)
ret = isolate_io(DEISOLATE_IO);
/* Deisolate IO if it is already isolated */
if (readl((*ctrl)->ctrl_core_sma_sw_0) & CTRL_ISOLATE_MASK)
isolate_io(DEISOLATE_IO);
/* lock IODELAY CONFIG registers */
writel(CFG_IODELAY_LOCK_KEY, (*ctrl)->iodelay_config_base +