diff options
Diffstat (limited to 'drivers/pinctrl')
| -rw-r--r-- | drivers/pinctrl/Kconfig | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig index 30b8e45..918a859 100644 --- 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" |