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

9 files changed, 0 insertions, 14 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,
diff --git a/arch/powerpc/platforms/83xx/mcu_mpc8349emitx.c b/arch/powerpc/platforms/83xx/mcu_mpc8349emitx.c
index f0dbace6185a..59b0ed1a56b1 100644
--- a/arch/powerpc/platforms/83xx/mcu_mpc8349emitx.c
+++ b/arch/powerpc/platforms/83xx/mcu_mpc8349emitx.c
@@ -90,8 +90,6 @@ static int mcu_gpiochip_add(struct mcu *mcu)
 	gc->base = -1;
 	gc->set = mcu_gpio_set;
 	gc->direction_output = mcu_gpio_dir_out;
-	gc->of_gpio_n_cells = 2;
-	gc->of_xlate = of_gpio_simple_xlate;
 	gc->of_node = np;
 
 	return gpiochip_add(gc);
diff --git a/arch/powerpc/sysdev/cpm1.c b/arch/powerpc/sysdev/cpm1.c
index d5cf7d4ccf81..00852124ff4a 100644
--- a/arch/powerpc/sysdev/cpm1.c
+++ b/arch/powerpc/sysdev/cpm1.c
@@ -633,7 +633,6 @@ int cpm1_gpiochip_add16(struct device_node *np)
 	gc = &mm_gc->gc;
 
 	mm_gc->save_regs = cpm1_gpio16_save_regs;
-	gc->of_gpio_n_cells = 2;
 	gc->ngpio = 16;
 	gc->direction_input = cpm1_gpio16_dir_in;
 	gc->direction_output = cpm1_gpio16_dir_out;
@@ -755,7 +754,6 @@ int cpm1_gpiochip_add32(struct device_node *np)
 	gc = &mm_gc->gc;
 
 	mm_gc->save_regs = cpm1_gpio32_save_regs;
-	gc->of_gpio_n_cells = 2;
 	gc->ngpio = 32;
 	gc->direction_input = cpm1_gpio32_dir_in;
 	gc->direction_output = cpm1_gpio32_dir_out;
diff --git a/arch/powerpc/sysdev/cpm_common.c b/arch/powerpc/sysdev/cpm_common.c
index 67e9b47dcf8e..2b69aa0315b3 100644
--- a/arch/powerpc/sysdev/cpm_common.c
+++ b/arch/powerpc/sysdev/cpm_common.c
@@ -337,7 +337,6 @@ int cpm2_gpiochip_add32(struct device_node *np)
 	gc = &mm_gc->gc;
 
 	mm_gc->save_regs = cpm2_gpio32_save_regs;
-	gc->of_gpio_n_cells = 2;
 	gc->ngpio = 32;
 	gc->direction_input = cpm2_gpio32_dir_in;
 	gc->direction_output = cpm2_gpio32_dir_out;
diff --git a/arch/powerpc/sysdev/mpc8xxx_gpio.c b/arch/powerpc/sysdev/mpc8xxx_gpio.c
index ec8fcd42101e..2b69084d0f0c 100644
--- a/arch/powerpc/sysdev/mpc8xxx_gpio.c
+++ b/arch/powerpc/sysdev/mpc8xxx_gpio.c
@@ -273,7 +273,6 @@ static void __init mpc8xxx_add_controller(struct device_node *np)
 	gc = &mm_gc->gc;
 
 	mm_gc->save_regs = mpc8xxx_gpio_save_regs;
-	gc->of_gpio_n_cells = 2;
 	gc->ngpio = MPC8XXX_GPIO_PINS;
 	gc->direction_input = mpc8xxx_gpio_dir_in;
 	gc->direction_output = mpc8xxx_gpio_dir_out;
diff --git a/arch/powerpc/sysdev/ppc4xx_gpio.c b/arch/powerpc/sysdev/ppc4xx_gpio.c
index 42e7a5eea665..fc65ad1b3293 100644
--- a/arch/powerpc/sysdev/ppc4xx_gpio.c
+++ b/arch/powerpc/sysdev/ppc4xx_gpio.c
@@ -194,7 +194,6 @@ static int __init ppc4xx_add_gpiochips(void)
 		mm_gc = &ppc4xx_gc->mm_gc;
 		gc = &mm_gc->gc;
 
-		gc->of_gpio_n_cells = 2;
 		gc->ngpio = 32;
 		gc->direction_input = ppc4xx_gpio_dir_in;
 		gc->direction_output = ppc4xx_gpio_dir_out;
diff --git a/arch/powerpc/sysdev/qe_lib/gpio.c b/arch/powerpc/sysdev/qe_lib/gpio.c
index 32e9440010a1..36bf845df127 100644
--- a/arch/powerpc/sysdev/qe_lib/gpio.c
+++ b/arch/powerpc/sysdev/qe_lib/gpio.c
@@ -321,7 +321,6 @@ static int __init qe_add_gpiochips(void)
 		gc = &mm_gc->gc;
 
 		mm_gc->save_regs = qe_gpio_save_regs;
-		gc->of_gpio_n_cells = 2;
 		gc->ngpio = QE_PIO_PINS;
 		gc->direction_input = qe_gpio_dir_in;
 		gc->direction_output = qe_gpio_dir_out;
diff --git a/arch/powerpc/sysdev/simple_gpio.c b/arch/powerpc/sysdev/simple_gpio.c
index b7559aa0c165..b6defda5ccc9 100644
--- a/arch/powerpc/sysdev/simple_gpio.c
+++ b/arch/powerpc/sysdev/simple_gpio.c
@@ -103,7 +103,6 @@ static int __init u8_simple_gpiochip_add(struct device_node *np)
 	gc = &mm_gc->gc;
 
 	mm_gc->save_regs = u8_gpio_save_regs;
-	gc->of_gpio_n_cells = 2;
 	gc->ngpio = 8;
 	gc->direction_input = u8_gpio_dir_in;
 	gc->direction_output = u8_gpio_dir_out;