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-rw-r--r--Documentation/devicetree/bindings/pinctrl/atmel,at91-pinctrl.txt22
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: