A-Team_Digital_Solutions/android_kernel_motorola_sm6375
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of/gpio: add default of_xlate function if device has a node pointer

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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 <[email protected]>
Signed-off-by: Grant Likely <[email protected]>
Cc: David Brownell <[email protected]>
Cc: Bill Gatliff <[email protected]>
Cc: Dmitry Eremin-Solenikov <[email protected]>
Cc: Benjamin Herrenschmidt <[email protected]>
Cc: Jean Delvare <[email protected]>
Cc: Andrew Morton <[email protected]>
CC: [email protected]
CC: [email protected]
This commit is contained in:
Anton Vorontsov 2010-06-08 07:48:17 -06:00 • committed by Grant Likely
commit 391c970c0d
13 changed files with 34 additions and 26 deletions
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5
drivers/gpio/gpiolib.c
View file

@ -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;

1
drivers/gpio/xilinx_gpio.c
View file

@ -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;