linux-next: build failure after merge of the gpio tree

[Stephen Rothwell]

Hi Linus,

After merging the gpio tree, today's linux-next build (arm
multi_v7_defconfig) failed like this:

drivers/tty/serial/st-asc.c: In function 'asc_set_termios':
drivers/tty/serial/st-asc.c:578:12: error: implicit declaration of function 'devm_get_gpiod_from_child' [-Werror=implicit-function-declaration]
    gpiod = devm_get_gpiod_from_child(port->dev, "rts",
            ^
drivers/tty/serial/st-asc.c:578:10: warning: assignment makes pointer from integer without a cast [-Wint-conversion]
    gpiod = devm_get_gpiod_from_child(port->dev, "rts",
          ^

Caused by commits

  a264d10ff45c ("gpiolib: Convert fwnode_get_named_gpiod() to configure GPIO")
  b2987d7438e0 ("gpio: Pass GPIO label down to gpiod_request")
  4b0947974e59 ("gpio: Rename devm_get_gpiod_from_child()")

interacting with commit

  d7356256488c ("serial: st-asc: (De)Register GPIOD and swap Pinctrl profiles")

from the tty tree.

I applied the following merge fix patch (I guessed about the new arguments):

From: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
Date: Wed, 8 Feb 2017 15:50:22 +1100
Subject: [PATCH] serial: st-asc: merge fix for devm_get_gpiod_from_child rename

Signed-off-by: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
---
 drivers/tty/serial/st-asc.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/tty/serial/st-asc.c b/drivers/tty/serial/st-asc.c
index bcf1d33e6ffe..c02e6b089364 100644
--- a/drivers/tty/serial/st-asc.c
+++ b/drivers/tty/serial/st-asc.c
@@ -575,8 +575,11 @@ 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);
+			gpiod =	devm_fwnode_get_gpiod_from_child(port->dev,
+								 "rts",
+								 &np->fwnode,
+								 GPIOD_IN,
+								 np->name);
 			if (!IS_ERR(gpiod)) {
 				gpiod_direction_output(gpiod, 0);
 				ascport->rts = gpiod;
-- 
2.10.2

-- 
Cheers,
Stephen Rothwell