kconfig: remove redundant 'default n'

[karo-tx-uboot.git] / drivers / gpio / Kconfig

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index d21302f8da95316cdf7891556a73bb0de576b8e1..6264c03443eced21906e0690070e28acaddcd582 100644 (file)
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -1,6 +1,56 @@
+#
+# GPIO infrastructure and drivers
+#
+
+menu "GPIO Support"
+
 config DM_GPIO
        bool "Enable Driver Model for GPIO drivers"
        depends on DM
        help
-         If you want to use driver model for GPIO drivers, say Y.
-         To use legacy GPIO drivers, say N.
+         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 DWAPB_GPIO
+       bool "DWAPB GPIO driver"
+       depends on DM && DM_GPIO
+       help
+         Support for the Designware APB GPIO driver.
+
+config LPC32XX_GPIO
+       bool "LPC32XX GPIO driver"
+       depends on DM
+       help
+         Support for the LPC32XX GPIO driver.
+
+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 VYBRID_GPIO
+       bool "Vybrid GPIO driver"
+       depends on DM
+       help
+         Say yes here to support Vybrid vf610 GPIOs.
+
+endmenu