[PATCH v2 31/35] earlycon: add reg-offset to physical address before mapping
From: Greentime Hu <hidden>
Date: 2017-11-27 12:57:21
Also in:
linux-arch, linux-serial, lkml, netdev
Subsystem:
the rest, tty layer and serial drivers · Maintainers:
Linus Torvalds, Greg Kroah-Hartman, Jiri Slaby
From: Greentime Hu <redacted> 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 --- drivers/tty/serial/earlycon.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/tty/serial/earlycon.c b/drivers/tty/serial/earlycon.c
index 98928f0..17dba0a 100644
--- a/drivers/tty/serial/earlycon.c
+++ b/drivers/tty/serial/earlycon.c@@ -253,11 +253,12 @@ 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);
--
1.7.9.5