Hi Lee,

[auto build test ERROR on tty/tty-testing]
[cannot apply to v4.10-rc7 next-20170208]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Lee-Jones/serial-st-asc-Use-new-GPIOD-API-to-obtain-RTS-pin/20170208-180609
base:   https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git tty-testing
config: x86_64-allmodconfig (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All errors (new ones prefixed by >>):

   drivers/tty/serial/st-asc.c: In function 'asc_set_termios':

quoted

drivers/tty/serial/st-asc.c:578:12: error: implicit declaration of function 'devm_fwnode_get_gpiod_from_child' [-Werror=implicit-function-declaration]

       gpiod = devm_fwnode_get_gpiod_from_child(port->dev,
               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/tty/serial/st-asc.c:578:10: warning: assignment makes pointer from integer without a cast [-Wint-conversion]
       gpiod = devm_fwnode_get_gpiod_from_child(port->dev,
             ^
   cc1: some warnings being treated as errors

vim +/devm_fwnode_get_gpiod_from_child +578 drivers/tty/serial/st-asc.c

   572		} else {
   573			/* If flow-control disabled, it's safe to handle RTS manually */
   574			if (!ascport->rts && ascport->states[NO_HW_FLOWCTRL]) {
   575				pinctrl_select_state(ascport->pinctrl,
   576						     ascport->states[NO_HW_FLOWCTRL]);
   577	
 > 578				gpiod = devm_fwnode_get_gpiod_from_child(port->dev,
   579									 "rts",
   580									 &np->fwnode,
   581									 GPIOD_OUT_LOW,

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