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serial: st-asc: Use new GPIOD API to obtain RTS pin

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The commits mentioned below adapt the GPIO API to allow more information
to be passed directly through devm_get_gpiod_from_child() in the first
instance.  This facilitates the removal of subsequent calls, such as
gpiod_direction_output().  This patch firstly moves to utilise the new
API and secondly removes the now superfluous call do set the direction.

Reported-by: Stephen Rothwell <[email protected]>
Suggested-by: Boris Brezillon <[email protected]>
Signed-off-by: Lee Jones <[email protected]>
[Also drop the header file dummies that only this driver was using]
Acked-by: Greg Kroah-Hartman <[email protected]>
Signed-off-by: Linus Walleij <[email protected]>
This commit is contained in:
Lee Jones 2017-02-08 09:24:25 +00:00 • committed by Linus Walleij
commit 0043c1dfbe
2 changed files with 6 additions and 21 deletions
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11
drivers/tty/serial/st-asc.c
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@ -575,12 +575,13 @@ static void asc_set_termios(struct uart_port *port, struct ktermios *termios,
pinctrl_select_state(ascport->pinctrl,
ascport->states[NO_HW_FLOWCTRL]);
gpiod = devm_get_gpiod_from_child(port->dev, "rts",
&np->fwnode);
if (!IS_ERR(gpiod)) {
gpiod_direction_output(gpiod, 0);
gpiod = devm_fwnode_get_gpiod_from_child(port->dev,
"rts",
&np->fwnode,
GPIOD_OUT_LOW,
np->name);
if (!IS_ERR(gpiod))
ascport->rts = gpiod;
}
}
}