# # GPIO infrastructure and drivers # menu "GPIO Support" config DM_GPIO bool "Enable Driver Model for GPIO drivers" depends on DM help Enable driver model for GPIO access. The standard GPIO interface (gpio_get_value(), etc.) is then implemented by the GPIO uclass. Drivers provide methods to query the particular GPIOs that they provide. The uclass interface is defined in include/asm-generic/gpio.h. config ALTERA_PIO bool "Altera PIO driver" depends on DM_GPIO help Select this to enable PIO for Altera devices. Please find details on the "Embedded Peripherals IP User Guide" of Altera. config DWAPB_GPIO bool "DWAPB GPIO driver" depends on DM && DM_GPIO default n help Support for the Designware APB GPIO driver. config ATMEL_PIO4 bool "ATMEL PIO4 driver" depends on DM default n help Say yes here to support the Atmel PIO4 driver. The PIO4 is new version of Atmel PIO controller, which manages up to 128 fully programmable input/output lines. Each I/O line may be dedicated as a general purpose I/O or be assigned to a function of an embedded peripheral. config INTEL_BROADWELL_GPIO bool "Intel Broadwell GPIO driver" depends on DM help This driver supports Broadwell U devices which have an expanded GPIO feature set. The difference is large enough to merit a separate driver from the common Intel ICH6 driver. It supports a total of 95 GPIOs which can be configured from the device tree. config LPC32XX_GPIO bool "LPC32XX GPIO driver" depends on DM default n help Support for the LPC32XX GPIO driver. config MSM_GPIO bool "Qualcomm GPIO driver" depends on DM_GPIO default n help Support GPIO controllers on Qualcomm Snapdragon family of SoCs. This controller have single bank (default name "soc"), every gpio has it's own set of registers. Only simple GPIO operations are supported (get/set, change of direction and checking pin function). Supported devices: - APQ8016 - MSM8916 config PM8916_GPIO bool "Qualcomm PM8916 PMIC GPIO/keypad driver" depends on DM_GPIO && PMIC_PM8916 help Support for GPIO pins and power/reset buttons found on Qualcomm PM8916 PMIC. Default name for GPIO bank is "pm8916". Power and reset buttons are placed in "pm8916_key" bank and have gpio numbers 0 and 1 respectively. config ROCKCHIP_GPIO bool "Rockchip GPIO driver" depends on DM_GPIO help Support GPIO access on Rockchip SoCs. The GPIOs are arranged into a number of banks (different for each SoC type) each with 32 GPIOs. The GPIOs for a device are defined in the device tree with one node for each bank. config SANDBOX_GPIO bool "Enable sandbox GPIO driver" depends on SANDBOX && DM && DM_GPIO help This driver supports some simulated GPIOs which can be adjusted using 'back door' functions like sandbox_gpio_set_value(). Then the GPIOs can be inspected through the normal get_get_value() interface. The purpose of this is to allow GPIOs to be used as normal in sandbox, perhaps with test code actually driving the behaviour of those GPIOs. config SANDBOX_GPIO_COUNT int "Number of sandbox GPIOs" depends on SANDBOX_GPIO default 128 help The sandbox driver can support any number of GPIOs. Generally these are specified using the device tree. But you can also have a number of 'anonymous' GPIOs that do not belong to any device or bank. Select a suitable value depending on your needs. config TEGRA_GPIO bool "Tegra20..210 GPIO driver" depends on DM_GPIO help Support for the GPIO controller contained in NVIDIA Tegra20 through Tegra210. config TEGRA186_GPIO bool "Tegra186 GPIO driver" depends on DM_GPIO help Support for the GPIO controller contained in NVIDIA Tegra186. This covers both the "main" and "AON" controller instances, even though they have slightly different register layout. config GPIO_UNIPHIER bool "UniPhier GPIO" depends on ARCH_UNIPHIER help Say yes here to support UniPhier GPIOs. config VYBRID_GPIO bool "Vybrid GPIO driver" depends on DM default n help Say yes here to support Vybrid vf610 GPIOs. config PIC32_GPIO bool "Microchip PIC32 GPIO driver" depends on DM_GPIO && MACH_PIC32 default y help Say yes here to support Microchip PIC32 GPIOs. config MVEBU_GPIO bool "Marvell MVEBU GPIO driver" depends on DM_GPIO && ARCH_MVEBU default y help Say yes here to support Marvell MVEBU (Armada XP/38x) GPIOs. config ZYNQ_GPIO bool "Zynq GPIO driver" depends on DM_GPIO && (ARCH_ZYNQ || ARCH_ZYNQMP) default y help Supports GPIO access on Zynq SoC. config DM_74X164 bool "74x164 serial-in/parallel-out 8-bits shift register" depends on DM_GPIO help Driver for 74x164 compatible serial-in/parallel-out 8-outputs shift registers, such as 74lv165, 74hc595. This driver can be used to provide access to more gpio outputs. config DM_PCA953X bool "PCA95[357]x, PCA9698, TCA64xx, and MAX7310 I/O ports" depends on DM_GPIO help Say yes here to provide access to several register-oriented SMBus I/O expanders, made mostly by NXP or TI. Compatible models include: 4 bits: pca9536, pca9537 8 bits: max7310, max7315, pca6107, pca9534, pca9538, pca9554, pca9556, pca9557, pca9574, tca6408, xra1202 16 bits: max7312, max7313, pca9535, pca9539, pca9555, pca9575, tca6416 24 bits: tca6424 40 bits: pca9505, pca9698 Now, max 24 bits chips and PCA953X compatible chips are supported config MPC85XX_GPIO bool "Freescale MPC85XX GPIO driver" depends on DM_GPIO help This driver supports the built-in GPIO controller of MPC85XX CPUs. Each GPIO bank is identified by its own entry in the device tree, i.e. gpio-controller@fc00 { #gpio-cells = <2>; compatible = "fsl,pq3-gpio"; reg = <0xfc00 0x100> } By default, each bank is assumed to have 32 GPIOs, but the ngpios setting is honored, so the number of GPIOs for each bank is configurable to match the actual GPIO count of the SoC (e.g. the 32/32/23 banks of the P1022 SoC). Aside from the standard functions of input/output mode, and output value setting, the open-drain feature, which can configure individual GPIOs to work as open-drain outputs, is supported. The driver has been tested on MPC85XX, but it is likely that other PowerQUICC III devices will work as well. endmenu