pinctrl: at91: update for drive strength options and tweaks

The drive strength patched introduced the atmel,sama5d-pinctrl
compatible string. Drive strength is now an option for the
CONFIG bits per pin. Also added note about MULTIDRIVE being
equivalent to open-drain output and added missing "s" at the
end of need everywhere in the bits descriptions.

Signed-off-by: Marek Roszko <mark.roszko@gmail.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 15 insertions, 7 deletions

diff --git a/Documentation/devicetree/bindings/pinctrl/atmel,at91-pinctrl.txt b/Documentation/devicetree/bindings/pinctrl/atmel,at91-pinctrl.txt
index 02ab5ab198a4..b7a93e80a302 100644
--- a/Documentation/devicetree/bindings/pinctrl/atmel,at91-pinctrl.txt
+++ b/Documentation/devicetree/bindings/pinctrl/atmel,at91-pinctrl.txt
@@ -19,6 +19,7 @@ such as pull-up, multi drive, etc.
 
 Required properties for iomux controller:
 - compatible: "atmel,at91rm9200-pinctrl" or "atmel,at91sam9x5-pinctrl"
+                or "atmel,sama5d3-pinctrl"
 - atmel,mux-mask: array of mask (periph per bank) to describe if a pin can be
   configured in this periph mode. All the periph and bank need to be describe.
 
@@ -85,13 +86,20 @@ Required properties for pin configuration node:
   PIN_BANK 0 is pioA, PIN_BANK 1 is pioB...
 
 Bits used for CONFIG:
-PULL_UP         (1 << 0): indicate this pin need a pull up.
-MULTIDRIVE      (1 << 1): indicate this pin need to be configured as multidrive.
-DEGLITCH        (1 << 2): indicate this pin need deglitch.
-PULL_DOWN       (1 << 3): indicate this pin need a pull down.
-DIS_SCHMIT      (1 << 4): indicate this pin need to disable schmit trigger.
-DEBOUNCE        (1 << 16): indicate this pin need debounce.
-DEBOUNCE_VAL    (0x3fff << 17): debounce val.
+PULL_UP         (1 << 0): indicate this pin needs a pull up.
+MULTIDRIVE      (1 << 1): indicate this pin needs to be configured as multi-drive.
+                        Multi-drive is equivalent to open-drain type output.
+DEGLITCH        (1 << 2): indicate this pin needs deglitch.
+PULL_DOWN       (1 << 3): indicate this pin needs a pull down.
+DIS_SCHMIT      (1 << 4): indicate this pin needs to the disable schmitt trigger.
+DRIVE_STRENGTH (3 << 5): indicate the drive strength of the pin using the
+                        following values:
+                                00 - No change (reset state value kept)
+                                01 - Low
+                                10 - Medium
+                                11 - High
+DEBOUNCE        (1 << 16): indicate this pin needs debounce.
+DEBOUNCE_VAL    (0x3fff << 17): debounce value.
 
 NOTE:
 Some requirements for using atmel,at91rm9200-pinctrl binding: