Re: [PATCH] bus: ti-sysc: Fix external abort for am335x pruss probe
flat view
From: Suman Anna <hidden>
Date: 2021-09-16 17:03:07
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Hi Tony, On 9/15/21 1:50 AM, Tony Lindgren wrote:
Starting with v5.15-rc1, I'm now seeing am335x beaglebone black produce the following error on pruss probe: Unhandled fault: external abort on non-linefetch (0x1008) at 0xe0326000 This seems to have started with the enabling of pruss for am335x in the dts files. Adding a read-back after write to the sysconfig register fixes the issue for me.
Let me take a look at this during the weekend. I did verify the AM335x PRUSS when I posted the dts patches on 5.14-rc. You should be able to check as well from your staging branch with PRUSS patches. regards Suman
quoted hunk ↗ jump to hunk
Cc: Suman Anna <redacted> Signed-off-by: Tony Lindgren <tony@atomide.com> --- drivers/bus/ti-sysc.c | 3 +++ 1 file changed, 3 insertions(+)diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c --- a/drivers/bus/ti-sysc.c +++ b/drivers/bus/ti-sysc.c@@ -2037,6 +2037,9 @@ static int sysc_reset(struct sysc *ddata) sysc_val = sysc_read_sysconfig(ddata); sysc_val |= sysc_mask; sysc_write(ddata, sysc_offset, sysc_val); + + /* Flush posted write */ + sysc_read_sysconfig(ddata); } if (ddata->cfg.srst_udelay)
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