[PATCH v2] serial: 8250_dw: get index of serial line from DT aliases
From: Julien CHAUVEAU <hidden>
Date: 2014-11-04 12:10:23
Also in:
lkml
Subsystem:
8250/16?50 (and clone uarts) serial driver, synopsys designware 8250 uart driver, the rest, tty layer and serial drivers · Maintainers:
Greg Kroah-Hartman, Ilpo Järvinen, Linus Torvalds, Jiri Slaby
Get index of serial line from device tree using function of_alias_get_id(). If no alias is found, the 8250 core takes care of incrementing the line number. Signed-off-by: Julien CHAUVEAU <redacted> --- Changes since v1: - use int type to get the value from of_alias_get_id (fix always true condition) drivers/tty/serial/8250/8250_dw.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c
index beea6ca..d96fc78 100644
--- a/drivers/tty/serial/8250/8250_dw.c
+++ b/drivers/tty/serial/8250/8250_dw.c@@ -258,6 +258,7 @@ static int dw8250_probe_of(struct uart_port *p, struct uart_8250_port *up = up_to_u8250p(p); u32 val; bool has_ucv = true; + int id; if (of_device_is_compatible(np, "cavium,octeon-3860-uart")) { #ifdef __BIG_ENDIAN
@@ -293,6 +294,11 @@ static int dw8250_probe_of(struct uart_port *p, if (!of_property_read_u32(np, "reg-shift", &val)) p->regshift = val; + /* get index of serial line, if found in DT aliases */ + id = of_alias_get_id(np, "serial"); + if (id >= 0) + p->line = id; + /* clock got configured through clk api, all done */ if (p->uartclk) return 0;
--
2.1.0