diff options
| author | Alexander Holler <holler@ahsoftware.de> | 2014-03-05 12:21:01 +0100 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2014-03-11 11:14:19 +0100 |
| commit | 758afe429c501924ac650ad667fd79f4bb06c05a (patch) | |
| tree | d2d038b3f4126f7aea3d37f4234315f7b4ace592 /drivers/gpio | |
| parent | d3e144532703fe2454b56eddb56f30d2d620187b (diff) | |
| download | linux-758afe429c501924ac650ad667fd79f4bb06c05a.tar.bz2 | |
gpio: davinci: fix gpio selection for OF
The driver missed an of_xlate function to translate gpio numbers
as found in the DT to the correct chip and number.
While there I've set #gpio_cells to a fixed value of 2.
I've used gpio-pxa.c as template for those changes and tested my changes
successfully on a da850 board using entries for gpio-leds in a DT. So I didn't
reinvent the wheel but just copied and tested stuff.
Thanks to Grygorii Strashko for the hint to the existing code in gpio-pxa.
Signed-off-by: Alexander Holler <holler@ahsoftware.de>
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/gpio-davinci.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/gpio/gpio-davinci.c b/drivers/gpio/gpio-davinci.c index 52470382a964..339f9dac591b 100644 --- a/drivers/gpio/gpio-davinci.c +++ b/drivers/gpio/gpio-davinci.c @@ -174,6 +174,27 @@ of_err: return NULL; } +#ifdef CONFIG_OF_GPIO +static int davinci_gpio_of_xlate(struct gpio_chip *gc, + const struct of_phandle_args *gpiospec, + u32 *flags) +{ + struct davinci_gpio_controller *chips = dev_get_drvdata(gc->dev); + struct davinci_gpio_platform_data *pdata = dev_get_platdata(gc->dev); + + if (gpiospec->args[0] > pdata->ngpio) + return -EINVAL; + + if (gc != &chips[gpiospec->args[0] / 32].chip) + return -EINVAL; + + if (flags) + *flags = gpiospec->args[1]; + + return gpiospec->args[0] % 32; +} +#endif + static int davinci_gpio_probe(struct platform_device *pdev) { int i, base; @@ -238,6 +259,9 @@ static int davinci_gpio_probe(struct platform_device *pdev) chips[i].chip.ngpio = 32; #ifdef CONFIG_OF_GPIO + chips[i].chip.of_gpio_n_cells = 2; + chips[i].chip.of_xlate = davinci_gpio_of_xlate; + chips[i].chip.dev = dev; chips[i].chip.of_node = dev->of_node; #endif spin_lock_init(&chips[i].lock); |