From 458a070076dc920a7106f0c8f0cfa880503ce498 Mon Sep 17 00:00:00 2001 From: Simon Glass <sjg@chromium.org> Date: Sun, 30 Aug 2015 16:55:12 -0600 Subject: [PATCH] pinctrl: Add help text to Kconfig The pinctrl Kconfig options should have help messages. Add this to a few options. Signed-off-by: Simon Glass <sjg@chromium.org> --- drivers/pinctrl/Kconfig | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig index 30b8e452efe..918a8592bba 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" -- GitLab