A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-30 03:27:44 -04:00
Code Issues Projects Releases Packages Wiki Activity

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

Browse source 
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
Download patch file Download diff file Expand all files Collapse all files

33
drivers/of/gpio.c
View file

@ -125,8 +125,8 @@ EXPORT_SYMBOL(of_gpio_count);
* gpio chips. This function performs only one sanity check: whether gpio
* is less than ngpios (that is specified in the gpio_chip).
*/
int of_gpio_simple_xlate(struct gpio_chip *gc, struct device_node *np,
const void *gpio_spec, u32 *flags)
static int of_gpio_simple_xlate(struct gpio_chip *gc, struct device_node *np,
const void *gpio_spec, u32 *flags)
{
const __be32 *gpio = gpio_spec;
const u32 n = be32_to_cpup(gpio);
@ -150,7 +150,6 @@ int of_gpio_simple_xlate(struct gpio_chip *gc, struct device_node *np,
return n;
}
EXPORT_SYMBOL(of_gpio_simple_xlate);
/**
* of_mm_gpiochip_add - Add memory mapped GPIO chip (bank)
@ -187,9 +186,6 @@ int of_mm_gpiochip_add(struct device_node *np,
gc->base = -1;
if (!gc->of_xlate)
gc->of_xlate = of_gpio_simple_xlate;
if (mm_gc->save_regs)
mm_gc->save_regs(mm_gc);
@ -199,9 +195,6 @@ int of_mm_gpiochip_add(struct device_node *np,
if (ret)
goto err2;
/* We don't want to lose the node and its ->data */
of_node_get(np);
pr_debug("%s: registered as generic GPIO chip, base is %d\n",
np->full_name, gc->base);
return 0;
@ -216,6 +209,28 @@ err0:
}
EXPORT_SYMBOL(of_mm_gpiochip_add);
void of_gpiochip_add(struct gpio_chip *chip)
{
if ((!chip->of_node) && (chip->dev))
chip->of_node = chip->dev->of_node;
if (!chip->of_node)
return;
if (!chip->of_xlate) {
chip->of_gpio_n_cells = 2;
chip->of_xlate = of_gpio_simple_xlate;
}
of_node_get(chip->of_node);
}
void of_gpiochip_remove(struct gpio_chip *chip)
{
if (chip->of_node)
of_node_put(chip->of_node);
}
/* Private function for resolving node pointer to gpio_chip */
static int of_gpiochip_is_match(struct gpio_chip *chip, void *data)
{