diff options
| author | Ioana Ciornei <ioana.ciornei@nxp.com> | 2025-10-31 16:12:00 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-11-02 16:14:42 +0300 |
| commit | 92a15817f0fbd13fb8153151a2918446cf48dbf5 (patch) | |
| tree | 51ac49d7370ae533be76768c82610a71c1447767 /include/linux/gpio | |
| parent | 38f50558b50cf92d71db828ae59414f52ab0cac8 (diff) | |
| download | linux-92a15817f0fbd13fb8153151a2918446cf48dbf5.tar.xz | |
gpio: regmap: add the .fixed_direction_output configuration parameter
[ Upstream commit 00aaae60faf554c27c95e93d47f200a93ff266ef ]
There are GPIO controllers such as the one present in the LX2160ARDB
QIXIS FPGA which have fixed-direction input and output GPIO lines mixed
together in a single register. This cannot be modeled using the
gpio-regmap as-is since there is no way to present the true direction of
a GPIO line.
In order to make this use case possible, add a new configuration
parameter - fixed_direction_output - into the gpio_regmap_config
structure. This will enable user drivers to provide a bitmap that
represents the fixed direction of the GPIO lines.
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Acked-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Michael Walle <mwalle@kernel.org>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Stable-dep-of: 2ba5772e530f ("gpio: idio-16: Define fixed direction of the GPIO lines")
Signed-off-by: William Breathitt Gray <wbg@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/gpio')
| -rw-r--r-- | include/linux/gpio/regmap.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/gpio/regmap.h b/include/linux/gpio/regmap.h index 76f6c73106dc..cf55202aaec2 100644 --- a/include/linux/gpio/regmap.h +++ b/include/linux/gpio/regmap.h @@ -37,6 +37,10 @@ struct regmap; * offset to a register/bitmask pair. If not * given the default gpio_regmap_simple_xlate() * is used. + * @fixed_direction_output: + * (Optional) Bitmap representing the fixed direction of + * the GPIO lines. Useful when there are GPIO lines with a + * fixed direction mixed together in the same register. * @drvdata: (Optional) Pointer to driver specific data which is * not used by gpio-remap but is provided "as is" to the * driver callback(s). @@ -82,6 +86,7 @@ struct gpio_regmap_config { int reg_stride; int ngpio_per_reg; struct irq_domain *irq_domain; + unsigned long *fixed_direction_output; #ifdef CONFIG_REGMAP_IRQ struct regmap_irq_chip *regmap_irq_chip; |