# # GPIO infrastructure and drivers # menuconfig GPIO bool "GPIO support" default y help Enable support for GPIOs (General-purpose Input/Output) in U-Boot. GPIOs allow U-Boot to read the state of an input line (high or low) and set the state of an output line. This can be used to drive LEDs, control power to various system parts and read user input. GPIOs can be useful to enable a 'sign-of-life' LED, for example. Enable this option to build the drivers in drivers/gpio as part of an U-Boot build. if GPIO 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 SPL_DM_GPIO bool "Enable Driver Model for GPIO drivers in SPL" depends on DM_GPIO && SPL_DM && SPL_GPIO default y help Enable driver model for GPIO access in SPL. 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 TPL_DM_GPIO bool "Enable Driver Model for GPIO drivers in TPL" depends on DM_GPIO && TPL_DM && TPL_GPIO default y help Enable driver model for GPIO access in TPL. 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 VPL_DM_GPIO bool "Enable Driver Model for GPIO drivers in VPL" depends on DM_GPIO && VPL_DM && VPL_GPIO default y help Enable driver model for GPIO access in VPL. 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 GPIO_HOG bool "Enable GPIO hog support" depends on DM_GPIO help Enable gpio hog support The GPIO chip may contain GPIO hog definitions. GPIO hogging is a mechanism providing automatic GPIO request and config- uration as part of the gpio-controller's driver probe function. config SPL_GPIO_HOG bool "Enable GPIO hog support in SPL" depends on SPL_GPIO help Enable gpio hog support in SPL The GPIO chip may contain GPIO hog definitions. GPIO hogging is a mechanism providing automatic GPIO request and config- uration as part of the gpio-controller's driver probe function. config DM_GPIO_LOOKUP_LABEL bool "Enable searching for gpio labelnames" depends on DM_GPIO help This option enables searching for gpio names in the defined gpio labels, if the search for the gpio bank name failed. This makes sense if you use different gpios on different hardware versions for the same functionality in board code. config SPL_DM_GPIO_LOOKUP_LABEL bool "Enable searching for gpio labelnames" depends on SPL_DM_GPIO help This option enables searching for gpio names in the defined gpio labels, if the search for the gpio bank name failed. This makes sense if you use different gpios on different hardware versions for the same functionality in board code. 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 BCM2835_GPIO bool "BCM2835 GPIO driver" depends on DM_GPIO config BCM6345_GPIO bool "BCM6345 GPIO driver" depends on DM_GPIO && (ARCH_BMIPS || ARCH_BCM68360 || \ ARCH_BCM6858 || ARCH_BCM63158 || \ ARCH_BCM6753) help This driver supports the GPIO banks on BCM6345 SoCs. config CORTINA_GPIO bool "Cortina-Access GPIO driver" depends on DM_GPIO && CORTINA_PLATFORM help Enable support for the GPIO controller in Cortina CAxxxx SoCs. This driver supports all CPU ISA variants supported by Cortina Access CAxxxx SoCs. config DWAPB_GPIO bool "DWAPB GPIO driver" depends on DM && DM_GPIO help Support for the Designware APB GPIO driver. config AT91_GPIO bool "AT91 PIO GPIO driver" help Say yes here to select AT91 PIO GPIO driver. AT91 PIO controller manages up to 32 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. The assignment to a function of an embedded peripheral is the responsibility of AT91 Pinctrl driver. This driver is responsible for the general-purpose I/O. config ATMEL_PIO4 bool "ATMEL PIO4 driver" depends on DM_GPIO 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 ASPEED_GPIO bool "Aspeed GPIO Driver" help Say yes here to support the Aspeed GPIO driver. The controller is found in the AST2400, AST2500 and AST2600 BMC SoCs and provides access to over 200 GPIOs on each chip. config DA8XX_GPIO bool "DA8xx GPIO Driver" help This driver supports the DA8xx GPIO controller config FXL6408_GPIO bool "FXL6408 I2C GPIO expander driver" depends on DM_GPIO && DM_I2C help This driver supports the Fairchild FXL6408 device. FXL6408 is a fully configurable 8-bit I2C-controlled GPIO expander. 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 INTEL_GPIO bool "Intel generic GPIO driver" depends on DM_GPIO help Say yes here to select Intel generic GPIO driver. This controller supports recent chips (e.g. Apollo Lake). It permits basic GPIO control including setting pins to input/output. It makes use of its parent pinctrl driver to actually effect changes. config INTEL_ICH6_GPIO bool "Intel ICH6 compatible legacy GPIO driver" depends on DM_GPIO help Say yes here to select Intel ICH6 compatible legacy GPIO driver. config IMX_RGPIO2P bool "i.MX7ULP RGPIO2P driver" depends on DM help This driver supports i.MX7ULP Rapid GPIO2P controller. config IPROC_GPIO bool "Broadcom iProc GPIO driver(without pinconf)" help The Broadcom iProc based SoCs- Cygnus, NS2, NS3, NSP and Stingray, use the same GPIO Controller IP hence this driver could be used for all. The Broadcom iProc based SoCs have multiple GPIO controllers and only the always-ON GPIO controller (CRMU/AON) is supported by this driver. config HSDK_CREG_GPIO bool "HSDK CREG GPIO griver" depends on DM_GPIO help This driver supports CREG GPIOs on Synopsys HSDK SOC. config KIRKWOOD_GPIO bool "Kirkwood GPIO driver" help This drdiver supports GPIOs on Kirkwood platforms config LPC32XX_GPIO bool "LPC32XX GPIO driver" depends on DM help Support for the LPC32XX GPIO driver. config MAX7320_GPIO bool "MAX7320 I2C GPIO Expander driver" depends on DM_GPIO && DM_I2C help Support for MAX7320 I2C 8/16-bit GPIO expander. original maxim device has 8 push/pull outputs, some clones offers 16bit. config MCP230XX_GPIO bool "MCP230XX GPIO driver" depends on DM help Support for Microchip's MCP230XX I2C connected GPIO devices. The following chips are supported: - MCP23008 - MCP23017 - MCP23018 config MSCC_SGPIO bool "Microsemi Serial GPIO driver" depends on DM_GPIO && SOC_VCOREIII help Support for the VCoreIII SoC serial GPIO device. By using a serial interface, the SIO controller significantly extends the number of available GPIOs with a minimum number of additional pins on the device. The primary purpose of the SIO controller is to connect control signals from SFP modules and to act as an LED controller. config MSM_GPIO bool "Qualcomm GPIO driver" depends on DM_GPIO 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 MXC_GPIO bool "Freescale/NXP MXC GPIO driver" help Support GPIO controllers on various i.MX platforms config MXS_GPIO bool "Freescale/NXP MXS GPIO driver" help Support GPIO controllers on i.MX23 and i.MX28 platforms config NPCM_GPIO bool "Nuvoton NPCM GPIO driver" depends on DM_GPIO help Support GPIO controllers on Nuvovon NPCM SoCs. NPCM7xx/NPCM8xx contain 8 GPIO banks, each bank contains 32 pins. config OMAP_GPIO bool "TI OMAP GPIO driver" depends on ARCH_OMAP2PLUS default y help Support GPIO controllers on the TI OMAP3/4/5 and related (such as AM335x/AM43xx/AM57xx/DRA7xx/etc) families of SoCs. config CMD_PCA953X bool "Enable the pca953x command" help Deprecated: This should be converted to driver model. This command provides access to a pca953x GPIO device using the legacy GPIO interface. Several subcommands are provided which mirror the standard 'gpio' command. It should use that instead. config QCOM_PMIC_GPIO bool "Qualcomm generic PMIC GPIO/keypad driver" depends on DM_GPIO && PMIC_QCOM help Support for GPIO pins and power/reset buttons found on Qualcomm SoCs PMIC. Default name for GPIO bank is "pm8916". Power and reset buttons are placed in "pwkey_qcom" bank and have gpio numbers 0 and 1 respectively. config PCF8575_GPIO bool "PCF8575 I2C GPIO Expander driver" depends on DM_GPIO && DM_I2C help Support for PCF8575 I2C 16-bit GPIO expander. Most of these chips are from NXP and TI. config RCAR_GPIO bool "Renesas RCar GPIO driver" depends on DM_GPIO && ARCH_RMOBILE help This driver supports the GPIO banks on Renesas RCar SoCs. config RZA1_GPIO bool "Renesas RZ/A1 GPIO driver" depends on DM_GPIO && RZA1 help This driver supports the GPIO banks on Renesas RZ/A1 R7S72100 SoCs. 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 SUNXI_GPIO bool "Allwinner GPIO driver" depends on ARCH_SUNXI select SPL_STRTO if SPL help Support the GPIO device in Allwinner SoCs. config XILINX_GPIO bool "Xilinx GPIO driver" depends on DM_GPIO help This config enable the Xilinx GPIO driver for Microblaze. config CMD_TCA642X bool "tca642x - Command to access tca642x state" help DEPRECATED - This needs conversion to driver model This provides a way to looking at the pin state of this device. This mirrors the 'gpio' command and that should be used in preference to custom code. 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 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 OCTEON_GPIO bool "Octeon II/III/TX/TX2 GPIO driver" depends on DM_GPIO && PCI && (ARCH_OCTEON || ARCH_OCTEONTX || ARCH_OCTEONTX2) default y help Add support for the Marvell Octeon GPIO driver. This is used with various Octeon parts such as Octeon II/III and OcteonTX/TX2. Octeon II/III has 32 GPIOs (count defined via DT) and OcteonTX/TX2 has 64 GPIOs (count defined via internal register). config STM32_GPIO bool "ST STM32 GPIO driver" depends on DM_GPIO && (ARCH_STM32 || ARCH_STM32MP) default y help Device model driver support for STM32 GPIO controller. It should be usable on many stm32 families like stm32f4/f7/h7 and stm32mp1. Tested on STM32F7. config SIFIVE_GPIO bool "SiFive GPIO driver" depends on DM_GPIO help Device model driver for GPIO controller present in SiFive FU540 SoC. This driver enables GPIO interface on HiFive Unleashed A00 board. config MVEBU_GPIO bool "Marvell MVEBU GPIO driver" depends on DM_GPIO && (ARCH_MVEBU || ARCH_KIRKWOOD) 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 default y if ARCH_ZYNQ || ARCH_ZYNQMP || ARCH_VERSAL 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 && DM_I2C 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 SPL_DM_PCA953X bool "PCA95[357]x, PCA9698, TCA64xx, and MAX7310 I/O ports in SPL" depends on SPL_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 MPC8XXX_GPIO bool "Freescale MPC8XXX GPIO driver" depends on DM_GPIO help This driver supports the built-in GPIO controller of MPC8XXX 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. config MPC83XX_SPISEL_BOOT bool "Freescale MPC83XX SPISEL_BOOT driver" depends on DM_GPIO && ARCH_MPC830X help GPIO driver to set/clear dedicated SPISEL_BOOT output on MPC83XX. This pin is typically used as spi chip select to a spi nor flash. config MT7620_GPIO bool "MediaTek MT7620 GPIO driver" depends on DM_GPIO && SOC_MT7620 default y help Device model driver for GPIO controller present in MediaTek MT7620 and earlier SoCs. config MT7621_GPIO bool "MediaTek MT7621 GPIO driver" depends on DM_GPIO && (SOC_MT7621 || SOC_MT7628) default y help Say yes here to support MediaTek MT7621 compatible GPIOs. config NX_GPIO bool "Nexell GPIO driver" depends on DM_GPIO help Support GPIO access on Nexell 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 NOMADIK_GPIO bool "Nomadik GPIO driver" depends on DM_GPIO help Support GPIO access on ST-Ericsson Ux500 SoCs. The GPIOs are arranged into a number of banks each with 32 GPIOs. The GPIOs for a device are defined in the device tree with one node for each bank. config ZYNQMP_GPIO_MODEPIN bool "ZynqMP gpio modepin" depends on DM_GPIO help This config enables the ZynqMP gpio modepin driver. ZynqMP modepin driver will set and get the status of PS_MODE pins. These modepins are accessed using xilinx firmware. In modepin register, [3:0] bits set direction, [7:4] bits read IO, [11:8] bits set/clear IO. config SL28CPLD_GPIO bool "Kontron sl28cpld GPIO driver" depends on DM_GPIO && SL28CPLD help Support GPIO access on Kontron sl28cpld board management controllers. config SLG7XL45106_I2C_GPO bool "slg7xl45106 i2c gpo expander" depends on DM_GPIO help Support for slg7xl45106 i2c gpo expander. It is an i2c based 8-bit gpo expander, all gpo lines are controlled by writing value into data register. config TURRIS_OMNIA_MCU bool "Turris Omnia MCU GPIO driver" depends on DM_GPIO default y if TARGET_TURRIS_OMNIA help Support for GPIOs on MCU connected to Turris Omnia via i2c. endif