pinctrl: uniphier: add UniPhier pinctrl core support

[platform/kernel/u-boot.git] / drivers / pinctrl / Kconfig

diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig
index 30b8e45..3b6e3b7 100644 (file)
--- a/drivers/pinctrl/Kconfig
+++ b/drivers/pinctrl/Kconfig
@@ -47,7 +47,10 @@ config PINMUX
        default y
        help
          This option enables pin multiplexing through the generic pinctrl
-         framework.
+         framework. Most SoCs have their own own multiplexing arrangement
+         where a single pin can be used for several functions. An SoC pinctrl
+         driver allows the required function to be selected for each pin.
+         The driver is typically controlled by the device tree.
 
 config PINCONF
        bool "Support pin configuration controllers"
@@ -86,6 +89,12 @@ config SPL_PINMUX
        help
          This option is an SPL-variant of the PINMUX option.
          See the help of PINMUX for details.
+         The pinctrl subsystem can add a substantial overhead to the SPL
+         image since it typically requires quite a few tables either in the
+         driver or in the device tree. If this is acceptable and you need
+         to adjust pin multiplexing in SPL in order to boot into U-Boot,
+         enable this option. You will need to enable device tree in SPL
+         for this to work.
 
 config SPL_PINCONF
        bool "Support pin configuration controllers in SPL"
@@ -96,6 +105,15 @@ config SPL_PINCONF
 
 if PINCTRL || SPL_PINCTRL
 
+config ROCKCHIP_PINCTRL
+       bool "Rockchip pin control driver"
+       depends on DM
+       help
+         Support pin multiplexing control on Rockchip SoCs. The driver is
+         controlled by a device tree node which contains both the GPIO
+         definitions and pin control functions for each available multiplex
+         function.
+
 config PINCTRL_SANDBOX
        bool "Sandbox pinctrl driver"
        depends on SANDBOX
@@ -106,4 +124,6 @@ config PINCTRL_SANDBOX
 
 endif
 
+source "drivers/pinctrl/uniphier/Kconfig"
+
 endmenu