gpio: constify gpio_chip structures

These structures are only used to copy into other structures, so declare
them as const.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@r disable optional_qualifier@
identifier i;
position p;
@@
static struct gpio_chip i@p = { ... };

@ok@
identifier r.i;
expression e;
position p;
@@
e = i@p;

@bad@
position p != {r.p,ok.p};
identifier r.i;
struct gpio_chip e;
@@
e@i@p

@depends on !bad disable optional_qualifier@
identifier r.i;
@@
static
+const
 struct gpio_chip i = { ... };
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Acked-by: Joachim Eastwood <manabian@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/gpio/gpio-lpc18xx.c b/drivers/gpio/gpio-lpc18xx.c
index 98832c9f614a..f12e02e1016d 100644
--- a/drivers/gpio/gpio-lpc18xx.c
+++ b/drivers/gpio/gpio-lpc18xx.c
@@ -78,7 +78,7 @@ static int lpc18xx_gpio_direction_output(struct gpio_chip *chip,
         return lpc18xx_gpio_direction(chip, offset, true);
 }
 
-static struct gpio_chip lpc18xx_chip = {
+static const struct gpio_chip lpc18xx_chip = {
         .label                  = "lpc18xx/43xx-gpio",
         .request                = gpiochip_generic_request,
         .free                   = gpiochip_generic_free,