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earlycon: add reg-offset to physical address before mapping

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It will get the wrong virtual address because port->mapbase is not added
the correct reg-offset yet. We have to update it before earlycon_map()
is called

Signed-off-by: Greentime Hu <[email protected]>
Acked-by: Arnd Bergmann <[email protected]>
Cc: Peter Hurley <[email protected]>
Cc: [email protected]
Fixes: 088da2a176 ("of: earlycon: Initialize port fields from DT properties")
Acked-by: Rob Herring <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Greentime Hu 2018-02-13 17:09:08 +08:00 • committed by Greg Kroah-Hartman
commit 1f66dd36bb
1 changed files with 2 additions and 1 deletions
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3
drivers/tty/serial/earlycon.c
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@ -245,11 +245,12 @@ int __init of_setup_earlycon(const struct earlycon_id *match,
}
port->mapbase = addr;
port->uartclk = BASE_BAUD * 16;
port->membase = earlycon_map(port->mapbase, SZ_4K);
val = of_get_flat_dt_prop(node, "reg-offset", NULL);
if (val)
port->mapbase += be32_to_cpu(*val);
port->membase = earlycon_map(port->mapbase, SZ_4K);
val = of_get_flat_dt_prop(node, "reg-shift", NULL);
if (val)
port->regshift = be32_to_cpu(*val);