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path: root/drivers/gpio/gpio-max77620.c
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* regmap: regmap-irq/gpio-max77620: add level-irq supportMatti Vaittinen2018-12-191-32/+64
| | | | | | | | | | | | | | | | Add level active IRQ support to regmap-irq irqchip. Change breaks existing regmap-irq type setting. Convert the existing drivers which use regmap-irq with trigger type setting (gpio-max77620) to work with this new approach. So we do not magically support level-active IRQs on gpio-max77620 - but add support to the regmap-irq for chips which support them =) We do not support distinguishing situation where HW supports rising and falling edge detection but not both. Separating this would require inventing yet another flags for IRQ types. Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com> Signed-off-by: Mark Brown <broonie@kernel.org>
* gpio: max77620: Make regmap_irq_chip constBhumika Goyal2017-08-141-1/+1
| | | | | | | | | Make the structure const as it is only passed to the function devm_regmap_add_irq_chip having the corresponding argument as const. Done using Coccinelle. Signed-off-by: Bhumika Goyal <bhumirks@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* pinctrl / gpio: Introduce .set_config() callback for GPIO chipsMika Westerberg2017-01-261-10/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently we already have two pin configuration related callbacks available for GPIO chips .set_single_ended() and .set_debounce(). In future we expect to have even more, which does not scale well if we need to add yet another callback to the GPIO chip structure for each possible configuration parameter. Better solution is to reuse what we already have available in the generic pinconf. To support this, we introduce a new .set_config() callback for GPIO chips. The callback takes a single packed pin configuration value as parameter. This can then be extended easily beyond what is currently supported by just adding new types to the generic pinconf enum. If the GPIO driver is backed up by a pinctrl driver the GPIO driver can just assign gpiochip_generic_config() (introduced in this patch) to .set_config and that will take care configuration requests are directed to the pinctrl driver. We then convert the existing drivers over .set_config() and finally remove the .set_single_ended() and .set_debounce() callbacks. Suggested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* gpio: max77620: add compatible string to device id listVenkat Reddy Talla2016-11-161-0/+1
| | | | | | | | Adding max20024 compatible string to the device id list to support both max77620 and max20024 devices. Signed-off-by: Venkat Reddy Talla <vreddytalla@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* gpio: max77620: Remove unused fields from struct max77620_gpioAxel Lin2016-10-241-8/+2
| | | | | | | | | Current code does not use gpio_irq/irq_base/gpio_base fields from struct max77620_gpio, so remove them. Signed-off-by: Axel Lin <axel.lin@ingics.com> Acked-by: Laxman Dewangan <ldewangan@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* gpio: max77620: get gpio value based on directionVenkat Reddy Talla2016-07-041-1/+4
| | | | | | | | | | Gpio direction is determined by DIRx bit of GPIO configuration register, return max77620 gpio value based on direction in or out. Signed-off-by: Venkat Reddy Talla <vreddytalla@nvidia.com> Reviewed-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* gpio: max77620: use the new open drain callbackLaxman Dewangan2016-06-071-0/+23
| | | | | | | | | | The MAX77620 have a GPIO pins which can act as open drain or push pull mode. Implement support for controlling this from GPIO descriptor tables or other hardware descriptions such as device tree by implementing the .set_single_ended() callback. Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* gpio: max77620: Configure interrupt trigger levelLaxman Dewangan2016-06-071-8/+59
| | | | | | | | | | | The GPIO sub modules of MAX77620 offers to configure the GPIO interrupt trigger level as RISING and FALLING edge. Pass this information to regmap-irg when registering for GPIO interrupts. Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* gpio: max77620: add gpio driver for MAX77620/MAX20024Laxman Dewangan2016-06-071-0/+238
MAXIM Semiconductor's PMIC, MAX77620/MAX20024 has 8 GPIO pins. It also supports interrupts from these pins. Add GPIO driver for these pins to control via GPIO APIs. Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>