Some SoCs (like Keystone) may require to perform special sequence of operations to assign output GPIO value, so default implementation of .set() callback from gpio-syscon driver can't be used.
Hence, add optional, SoC specific callback to assign output gpio value. Signed-off-by: Grygorii Strashko <[email protected]> --- drivers/gpio/gpio-syscon.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/gpio/gpio-syscon.c b/drivers/gpio/gpio-syscon.c index 30884fb..03b4699 100644 --- a/drivers/gpio/gpio-syscon.c +++ b/drivers/gpio/gpio-syscon.c @@ -37,6 +37,8 @@ * dat_bit_offset: Offset (in bits) to the first GPIO bit. * dir_bit_offset: Optional offset (in bits) to the first bit to switch * GPIO direction (Used with GPIO_SYSCON_FEAT_DIR flag). + * set: HW specific callback to assigns output value + * for signal "offset" */ struct syscon_gpio_data { @@ -45,6 +47,8 @@ struct syscon_gpio_data { unsigned int bit_count; unsigned int dat_bit_offset; unsigned int dir_bit_offset; + void (*set)(struct gpio_chip *chip, + unsigned offset, int value); }; struct syscon_gpio_priv { @@ -77,6 +81,11 @@ static void syscon_gpio_set(struct gpio_chip *chip, unsigned offset, int val) struct syscon_gpio_priv *priv = to_syscon_gpio(chip); unsigned int offs = priv->data->dat_bit_offset + offset; + if (priv->data->set) { + priv->data->set(chip, offset, val); + return; + } + regmap_update_bits(priv->syscon, (offs / SYSCON_REG_BITS) * SYSCON_REG_SIZE, BIT(offs % SYSCON_REG_BITS), -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-gpio" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
