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authorLinus Torvalds2013-01-03 15:10:18 -0600
committerLinus Torvalds2013-01-03 15:10:18 -0600
commit5f738967e89584f99c6a11c6bf09b16c50b6a03e (patch)
treec807b116deb121277799f316052349a5fa663af0 /Documentation
parent2318aa272072f6906de8e00a332da1485506b3c5 (diff)
parent9fcb4cc2d7dd192ae718f0e7484c6f5c08b8af23 (diff)
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Merge tag 'pinctrl-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl
Pull pinctrl fixes from Linus Walleij: "A first round of pinctrl fixes for v3.8: - i.MX5 register configuration - Swap a kfree to devm_kfree() to avoid memory corruption in the at91 driver - Add the missing device tree binding doc for the SIRF pin controller - Enable the SIRF GPIO pull up/down configuration from the device tree, it was previously retired from the hard-coded approach. - NULL check for the prcm_base in the Nomadik pin controller. - Provide the prcm_base from the device tree in the DT boot path for the Nomadik pin controller." * tag 'pinctrl-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: ARM: ux500: add pinctrl address resources pinctrl: nomadik: return if prcm_base is NULL pinctrl: sirf: enable GPIO pullup/down configuration from dts pinctrl: sirf: add missing DT-binding document pinctrl: fix comment mistake drivers/pinctrl/pinctrl-at91.c: convert kfree to devm_kfree pinctrl: imx5: fix GPIO_8 pad CAN1_RXCAN configuration
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/devicetree/bindings/pinctrl/pinctrl-sirf.txt47
1 files changed, 47 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/pinctrl/pinctrl-sirf.txt b/Documentation/devicetree/bindings/pinctrl/pinctrl-sirf.txt
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1CSR SiRFprimaII pinmux controller
2
3Required properties:
4- compatible : "sirf,prima2-pinctrl"
5- reg : Address range of the pinctrl registers
6- interrupts : Interrupts used by every GPIO group
7- gpio-controller : Indicates this device is a GPIO controller
8- interrupt-controller : Marks the device node as an interrupt controller
9Optional properties:
10- sirf,pullups : if n-th bit of m-th bank is set, set a pullup on GPIO-n of bank m
11- sirf,pulldowns : if n-th bit of m-th bank is set, set a pulldown on GPIO-n of bank m
12
13Please refer to pinctrl-bindings.txt in this directory for details of the common
14pinctrl bindings used by client devices.
15
16SiRFprimaII's pinmux nodes act as a container for an abitrary number of subnodes.
17Each of these subnodes represents some desired configuration for a group of pins.
18
19Required subnode-properties:
20- sirf,pins : An array of strings. Each string contains the name of a group.
21- sirf,function: A string containing the name of the function to mux to the
22 group.
23
24 Valid values for group and function names can be found from looking at the
25 group and function arrays in driver files:
26 drivers/pinctrl/pinctrl-sirf.c
27
28For example, pinctrl might have subnodes like the following:
29 uart2_pins_a: uart2@0 {
30 uart {
31 sirf,pins = "uart2grp";
32 sirf,function = "uart2";
33 };
34 };
35 uart2_noflow_pins_a: uart2@1 {
36 uart {
37 sirf,pins = "uart2_nostreamctrlgrp";
38 sirf,function = "uart2_nostreamctrl";
39 };
40 };
41
42For a specific board, if it wants to use uart2 without hardware flow control,
43it can add the following to its board-specific .dts file.
44uart2: uart@0xb0070000 {
45 pinctrl-names = "default";
46 pinctrl-0 = <&uart2_noflow_pins_a>;
47}