These patches add the bindings and the gpio driver for Realtek DHC(Digital Home Center) RTD SoCs, including RTD1295, RTD1395, RTD1619, RTD1319, RTD1619B, RTD1319D and RTD1315E. Change log: v4->v5: 1. Add more description in the Kconfig. 2. Add comment for the counter-intuitive number 31. 3. Convert to use cleanup API and module_platform_driver() macro. 4. Simplify some of the code as suggested in patch v4. v3->v4: 1. Arrange the compatible list in alphanumerical order. 2. Remove the size check for the offset array. 3. Add the debounce callback. 4. Conducted a review of the critical section, employing raw_spinlock_t for locking purposes. 5. Add gpiochip_enable_irq/gpiochip_disable_irq to fulfill the immutability requirements. 6. Use irqd_to_hwirq to get hwirq. v2->v3: 1. Remove generic compatible and use SoC-specific compatible instead. 2. Add the missing descriptions for the rtd_gpio_info structure members. 3. Assign gpio_chip fwnode. v1->v2: 1. Add description for DHC RTD SoCs in the bindings. 2. Revise the compatible names in the bindings. 3. Transitioned from OF API to platform_device API. 4. Use u8 for the offset array within the rtd_gpio_info structure. 5. Record the size of each array within the rtd_gpio_info structure and implement checks to prevent out-of-bounds access. 6. Use GPIOLIB_IRQCHIP helpers to register interrupts. 7. Use dynamic allocation for GPIO base. Tzuyi Chang (2): dt-bindings: gpio: realtek: Add realtek,rtd-gpio Add GPIO support for Realtek DHC(Digital Home Center) RTD SoCs. .../bindings/gpio/realtek,rtd-gpio.yaml | 69 ++ drivers/gpio/Kconfig | 13 + drivers/gpio/Makefile | 1 + drivers/gpio/gpio-rtd.c | 604 ++++++++++++++++++ 4 files changed, 687 insertions(+) create mode 100644 Documentation/devicetree/bindings/gpio/realtek,rtd-gpio.yaml create mode 100644 drivers/gpio/gpio-rtd.c -- 2.43.0
