A-Team_Digital_Solutions/android_kernel_motorola_sm6375
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staging: mt7621-gpio: use custom xlate function

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The default gpio.of_xlate function assumes there is one gpio chip
for each devicetree node. Device tree had changed to only use one node,
which corresponds to 3 different gpio chips now. For that approach
to work we need a custom xlate function.

Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Reviewed-by: NeilBrown <neil@brown.name>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sergio Paracuellos 2018-07-05 08:00:27 +02:00 • committed by Greg Kroah-Hartman
commit cf229037c5
1 changed files with 18 additions and 0 deletions
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18
drivers/staging/mt7621-gpio/gpio-mt7621.c
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@ -205,6 +205,22 @@ static inline const char * const mediatek_gpio_bank_name(int bank)
return bank_names[bank];
}
static int
mediatek_gpio_xlate(struct gpio_chip *chip,
const struct of_phandle_args *spec, u32 *flags)
{
int gpio = spec->args[0];
struct mtk_gc *rg = to_mediatek_gpio(chip);
if (rg->bank != gpio / MTK_BANK_WIDTH)
return -EINVAL;
if (flags)
*flags = spec->args[1];
return gpio % MTK_BANK_WIDTH;
}
static int
mediatek_gpio_bank_probe(struct platform_device *pdev,
struct device_node *node, int bank)
@ -220,6 +236,8 @@ mediatek_gpio_bank_probe(struct platform_device *pdev,
spin_lock_init(&rg->lock);
rg->chip.of_node = node;
rg->bank = bank;
rg->chip.of_gpio_n_cells = 2;
rg->chip.of_xlate = mediatek_gpio_xlate;
rg->chip.label = mediatek_gpio_bank_name(rg->bank);
dat = gpio->gpio_membase + GPIO_REG_DATA + (rg->bank * GPIO_BANK_WIDE);