Il 06/06/2018 13:56, Andy Shevchenko ha scritto:
On Wed, 2018-06-06 at 11:49 +0200, Giulio Benetti wrote:
em485 gets lost during serial8250_register_8250_port().
Copy em485 to final uart port.
Is it needed at all?
The individual driver decides either to use software emulation (and
calls explicitly serial8250_em485_init() for that) or do HW assisted
stuff.
In 8250_dw.c, during probe(), I need to call dw8250_rs485_config()
against local struct uart_8250_port uart = {};
Inside serial8250_register_8250_port() not all uart fields are
copied(em485 too).
So after probe, em485 is NULL.
Another way could be to call dw8250_rs485_config() against real uart
port, after calling serial8250_register_8250_port(),
would it make sense?
Signed-off-by: Giulio Benetti <giulio.benetti@xxxxxxxxxxxxxxxx>
---
drivers/tty/serial/8250/8250_core.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/tty/serial/8250/8250_core.c
b/drivers/tty/serial/8250/8250_core.c
index 9342fc2ee7df..c8c2b260c681 100644
--- a/drivers/tty/serial/8250/8250_core.c
+++ b/drivers/tty/serial/8250/8250_core.c
@@ -994,6 +994,7 @@ int serial8250_register_8250_port(struct
uart_8250_port *up)
uart->port.rs485_config = up-
port.rs485_config;
uart->port.rs485 = up->port.rs485;
uart->dma = up->dma;
+ uart->em485 = up->em485;
/* Take tx_loadsz from fifosize if it wasn't set
separately */
if (uart->port.fifosize && !uart->tx_loadsz)
--
Giulio Benetti
CTO
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