of/gpio: add default of_xlate function if device has a node pointer

Implement generic OF gpio hooks and thus make device-enabled GPIO chips
(i.e.  the ones that have gpio_chip->dev specified) automatically attach
to the OpenFirmware subsystem.  Which means that now we can handle I2C and
SPI GPIO chips almost* transparently.

* "Almost" because some chips still require platform data, and for these
  chips OF-glue is still needed, though with this change the glue will
  be much smaller.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Cc: David Brownell <dbrownell@users.sourceforge.net>
Cc: Bill Gatliff <bgat@billgatliff.com>
Cc: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Jean Delvare <khali@linux-fr.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
CC: linux-kernel@vger.kernel.org
CC: devicetree-discuss@lists.ozlabs.org

2 files changed, 0 insertions, 5 deletions

diff --git a/arch/powerpc/platforms/52xx/mpc52xx_gpio.c b/arch/powerpc/platforms/52xx/mpc52xx_gpio.c
index fd0912eeffe2..0855e804fc0d 100644
--- a/arch/powerpc/platforms/52xx/mpc52xx_gpio.c
+++ b/arch/powerpc/platforms/52xx/mpc52xx_gpio.c
@@ -161,7 +161,6 @@ static int __devinit mpc52xx_wkup_gpiochip_probe(struct of_device *ofdev,
 
         gc = &chip->mmchip.gc;
 
-        gc->of_gpio_n_cells  = 2;
         gc->ngpio            = 8;
         gc->direction_input  = mpc52xx_wkup_gpio_dir_in;
         gc->direction_output = mpc52xx_wkup_gpio_dir_out;
@@ -325,7 +324,6 @@ static int __devinit mpc52xx_simple_gpiochip_probe(struct of_device *ofdev,
 
         gc = &chip->mmchip.gc;
 
-        gc->of_gpio_n_cells  = 2;
         gc->ngpio            = 32;
         gc->direction_input  = mpc52xx_simple_gpio_dir_in;
         gc->direction_output = mpc52xx_simple_gpio_dir_out;
diff --git a/arch/powerpc/platforms/52xx/mpc52xx_gpt.c b/arch/powerpc/platforms/52xx/mpc52xx_gpt.c
index 6e82bd27132c..5d7d607617cd 100644
--- a/arch/powerpc/platforms/52xx/mpc52xx_gpt.c
+++ b/arch/powerpc/platforms/52xx/mpc52xx_gpt.c
@@ -348,10 +348,7 @@ mpc52xx_gpt_gpio_setup(struct mpc52xx_gpt_priv *gpt, struct device_node *node)
         gpt->gc.get = mpc52xx_gpt_gpio_get;
         gpt->gc.set = mpc52xx_gpt_gpio_set;
         gpt->gc.base = -1;
-        gpt->gc.of_gpio_n_cells = 2;
-        gpt->gc.of_xlate = of_gpio_simple_xlate;
         gpt->gc.of_node = node;
-        of_node_get(node);
 
         /* Setup external pin in GPIO mode */
         clrsetbits_be32(&gpt->regs->mode, MPC52xx_GPT_MODE_MS_MASK,