summaryrefslogtreecommitdiffstats
path: root/Documentation/devicetree/bindings/pinctrl/pinctrl-palmas.txt
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--Documentation/devicetree/bindings/pinctrl/pinctrl-palmas.txt105
1 files changed, 105 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/pinctrl/pinctrl-palmas.txt b/Documentation/devicetree/bindings/pinctrl/pinctrl-palmas.txt
new file mode 100644
index 000000000..c28d4eb83
--- /dev/null
+++ b/Documentation/devicetree/bindings/pinctrl/pinctrl-palmas.txt
@@ -0,0 +1,105 @@
+Palmas Pincontrol bindings
+
+The pins of Palmas device can be set on different option and provides
+the configuration for Pull UP/DOWN, open drain etc.
+
+Required properties:
+- compatible: It must be one of following:
+ - "ti,palmas-pinctrl" for Palma series of the pincontrol.
+ - "ti,tps65913-pinctrl" for Palma series device TPS65913.
+ - "ti,tps80036-pinctrl" for Palma series device TPS80036.
+
+Please refer to pinctrl-bindings.txt in this directory for details of the
+common pinctrl bindings used by client devices, including the meaning of the
+phrase "pin configuration node".
+
+Palmas's pin configuration nodes act as a container for an arbitrary number of
+subnodes. Each of these subnodes represents some desired configuration for a
+list of pins. This configuration can include the mux function to select on
+those pin(s), and various pin configuration parameters, such as pull-up,
+open drain.
+
+The name of each subnode is not important; all subnodes should be enumerated
+and processed purely based on their content.
+
+Each subnode only affects those parameters that are explicitly listed. In
+other words, a subnode that lists a mux function but no pin configuration
+parameters implies no information about any pin configuration parameters.
+Similarly, a pin subnode that describes a pullup parameter implies no
+information about e.g. the mux function.
+
+Optional properties:
+- ti,palmas-enable-dvfs1: Enable DVFS1. Configure pins for DVFS1 mode.
+ Selection primary or secondary function associated to I2C2_SCL_SCE,
+ I2C2_SDA_SDO pin/pad for DVFS1 interface
+- ti,palmas-enable-dvfs2: Enable DVFS2. Configure pins for DVFS2 mode.
+ Selection primary or secondary function associated to GPADC_START
+ and SYSEN2 pin/pad for DVFS2 interface
+- ti,palmas-override-powerhold: This is applicable for PMICs for which
+ GPIO7 is configured in POWERHOLD mode which has higher priority
+ over DEV_ON bit and keeps the PMIC supplies on even after the DEV_ON
+ bit is turned off. This property enables driver to over ride the
+ POWERHOLD value to GPIO7 so as to turn off the PMIC in power off
+ scenarios. So for GPIO7 if ti,palmas-override-powerhold is set
+ then the GPIO_7 field should never be muxed to anything else.
+ It should be set to POWERHOLD by default and only in case of
+ power off scenarios the driver will over ride the mux value.
+
+This binding uses the following generic properties as defined in
+pinctrl-bindings.txt:
+
+Required: pins
+Options: function, bias-disable, bias-pull-up, bias-pull-down,
+ drive-open-drain.
+
+Note that many of these properties are only valid for certain specific pins.
+See the Palmas device datasheet for complete details regarding which pins
+support which functionality.
+
+Valid values for pin names are:
+ gpio0, gpio1, gpio2, gpio3, gpio4, gpio5, gpio6, gpio7, gpio8, gpio9,
+ gpio10, gpio11, gpio12, gpio13, gpio14, gpio15, vac, powergood,
+ nreswarm, pwrdown, gpadc_start, reset_in, nsleep, enable1, enable2,
+ int.
+
+Valid value of function names are:
+ gpio, led, pwm, regen, sysen, clk32kgaudio, id, vbus_det, chrg_det,
+ vac, vacok, powergood, usb_psel, msecure, pwrhold, int, nreswarm,
+ simrsto, simrsti, low_vbat, wireless_chrg1, rcm, pwrdown, gpadc_start,
+ reset_in, nsleep, enable.
+
+There are 4 special functions: opt0, opt1, opt2 and opt3. If any of these
+functions is selected then directly pins register will be written with 0, 1, 2
+or 3 respectively if it is valid for that pins or list of pins.
+
+Example:
+ palmas: tps65913 {
+ ....
+ pinctrl {
+ compatible = "ti,tps65913-pinctrl";
+ ti,palmas-enable-dvfs1;
+ pinctrl-names = "default";
+ pinctrl-0 = <&palmas_pins_state>;
+
+ palmas_pins_state: pinmux {
+ gpio0 {
+ pins = "gpio0";
+ function = "id";
+ bias-pull-up;
+ };
+
+ vac {
+ pins = "vac";
+ function = "vacok";
+ bias-pull-down;
+ };
+
+ gpio5 {
+ pins = "gpio5";
+ function = "opt0";
+ drive-open-drain = <1>;
+ };
+ };
+ };
+ ....
+ };