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authorAnton Vorontsov <avorontsov@ru.mvista.com>2010-06-08 07:48:17 -0600
committerGrant Likely <grant.likely@secretlab.ca>2010-07-05 16:14:30 -0600
commit391c970c0dd1100e3b9e1681f7d0f20aac35455a (patch)
tree05a42941269f77b22de6b640953df61f2da5d13c /drivers/gpio
parent594fa265e084073443390c5b93d5410fd28e9bcd (diff)
downloadop-kernel-dev-391c970c0dd1100e3b9e1681f7d0f20aac35455a.zip
op-kernel-dev-391c970c0dd1100e3b9e1681f7d0f20aac35455a.tar.gz
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
Diffstat (limited to 'drivers/gpio')
-rw-r--r--drivers/gpio/gpiolib.c5
-rw-r--r--drivers/gpio/xilinx_gpio.c1
2 files changed, 5 insertions, 1 deletions
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 73fd328..83cbc34 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -8,6 +8,7 @@
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/gpio.h>
+#include <linux/of_gpio.h>
#include <linux/idr.h>
#include <linux/slab.h>
@@ -1099,6 +1100,8 @@ int gpiochip_add(struct gpio_chip *chip)
}
}
+ of_gpiochip_add(chip);
+
unlock:
spin_unlock_irqrestore(&gpio_lock, flags);
@@ -1133,6 +1136,8 @@ int gpiochip_remove(struct gpio_chip *chip)
spin_lock_irqsave(&gpio_lock, flags);
+ of_gpiochip_remove(chip);
+
for (id = chip->base; id < chip->base + chip->ngpio; id++) {
if (test_bit(FLAG_REQUESTED, &gpio_desc[id].flags)) {
status = -EBUSY;
diff --git a/drivers/gpio/xilinx_gpio.c b/drivers/gpio/xilinx_gpio.c
index 2993c40..7096909 100644
--- a/drivers/gpio/xilinx_gpio.c
+++ b/drivers/gpio/xilinx_gpio.c
@@ -190,7 +190,6 @@ static int __devinit xgpio_of_probe(struct device_node *np)
spin_lock_init(&chip->gpio_lock);
- chip->mmchip.gc.of_gpio_n_cells = 2;
chip->mmchip.gc.direction_input = xgpio_dir_in;
chip->mmchip.gc.direction_output = xgpio_dir_out;
chip->mmchip.gc.get = xgpio_get;
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