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author | Linus Torvalds <torvalds@linux-foundation.org> | 2015-09-04 10:22:09 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-09-04 10:22:09 -0700 |
commit | 88a99886c26fec8bf662e7b6bc080431a8660326 (patch) | |
tree | 615b9a9a959ab093f6d8d0dd94d3bbc5299fc4c6 /Documentation/devicetree/bindings/pinctrl/cnxt,cx92755-pinctrl.txt | |
parent | 8d2faea672606827c2018143ec7d88c760f2d6de (diff) | |
parent | 1ab36387ea4face01aac3560b396b1e2ce07c4ff (diff) | |
download | op-kernel-dev-88a99886c26fec8bf662e7b6bc080431a8660326.zip op-kernel-dev-88a99886c26fec8bf662e7b6bc080431a8660326.tar.gz |
Merge tag 'pinctrl-v4.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl
Pull pin control updates from Linus Walleij:
"This is the bulk of pin control changes for the v4.3 development
cycle.
Like with GPIO it's a lot of stuff. If my subsystems are any sign of
the overall tempo of the kernel v4.3 will be a gigantic diff.
[ It looks like 4.3 is calmer than 4.2 in most other subsystems, but
we'll see - Linus ]
Core changes:
- It is possible configure groups in debugfs.
- Consolidation of chained IRQ handler install/remove replacing all
call sites where irq_set_handler_data() and
irq_set_chained_handler() were done in succession with a combined
call to irq_set_chained_handler_and_data(). This series was
created by Thomas Gleixner after the problem was observed by
Russell King.
- Tglx also made another series of patches switching
__irq_set_handler_locked() for irq_set_handler_locked() which is
way cleaner.
- Tglx also wrote a good bunch of patches to make use of
irq_desc_get_xxx() accessors and avoid looking up irq_descs from
IRQ numbers. The goal is to get rid of the irq number from the
handlers in the IRQ flow which is nice.
Driver feature enhancements:
- Power management support for the SiRF SoC Atlas 7.
- Power down support for the Qualcomm driver.
- Intel Cherryview and Baytrail: switch drivers to use raw spinlocks
in IRQ handlers to play nice with the realtime patch set.
- Rework and new modes handling for Qualcomm SPMI-MPP.
- Pinconf power source config for SH PFC.
New drivers and subdrivers:
- A new driver for Conexant Digicolor CX92755.
- A new driver for UniPhier PH1-LD4, PH1-Pro4, PH1-sLD8, PH1-Pro5,
ProXtream2 and PH1-LD6b SoC pin control support.
- Reverse-egineered the S/PDIF settings for the Allwinner sun4i
driver.
- Support for Qualcomm Technologies QDF2xxx ARM64 SoCs
- A new Freescale i.mx6ul subdriver.
Cleanup:
- Remove platform data support in a number of SH PFC subdrivers"
* tag 'pinctrl-v4.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (95 commits)
pinctrl: at91: fix null pointer dereference
pinctrl: mediatek: Implement wake handler and suspend resume
pinctrl: mediatek: Fix multiple registration issue.
pinctrl: sh-pfc: r8a7794: add USB pin groups
pinctrl: at91: Use generic irq_{request,release}_resources()
pinctrl: cherryview: Use raw_spinlock for locking
pinctrl: baytrail: Use raw_spinlock for locking
pinctrl: imx6ul: Remove .owner field
pinctrl: zynq: Fix typos in smc0_nand_grp and smc0_nor_grp
pinctrl: sh-pfc: Implement pinconf power-source param for voltage switching
clk: rockchip: add pclk_pd_pmu to the list of rk3288 critical clocks
pinctrl: sun4i: add spdif to pin description.
pinctrl: atlas7: clear ugly branch statements for pull and drivestrength
pinctrl: baytrail: Serialize all register access
pinctrl: baytrail: Drop FSF mailing address
pinctrl: rockchip: only enable gpio clock when it setting
pinctrl/mediatek: fix spelling mistake in dev_err error message
pinctrl: cherryview: Serialize all register access
pinctrl: UniPhier: PH1-Pro5: add I2C ch6 pin-mux setting
pinctrl: nomadik: reflect current input value
...
Diffstat (limited to 'Documentation/devicetree/bindings/pinctrl/cnxt,cx92755-pinctrl.txt')
-rw-r--r-- | Documentation/devicetree/bindings/pinctrl/cnxt,cx92755-pinctrl.txt | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/pinctrl/cnxt,cx92755-pinctrl.txt b/Documentation/devicetree/bindings/pinctrl/cnxt,cx92755-pinctrl.txt new file mode 100644 index 0000000..23ce8dc26 --- /dev/null +++ b/Documentation/devicetree/bindings/pinctrl/cnxt,cx92755-pinctrl.txt @@ -0,0 +1,86 @@ +Conexant Digicolor CX92755 General Purpose Pin Mapping + +This document describes the device tree binding of the pin mapping hardware +modules in the Conexant Digicolor CX92755 SoCs. The CX92755 in one of the +Digicolor series of SoCs. + +=== Pin Controller Node === + +Required Properties: + +- compatible: Must be "cnxt,cx92755-pinctrl" +- reg: Base address of the General Purpose Pin Mapping register block and the + size of the block. +- gpio-controller: Marks the device node as a GPIO controller. +- #gpio-cells: Must be <2>. The first cell is the pin number and the + second cell is used to specify flags. See include/dt-bindings/gpio/gpio.h + for possible values. + +For example, the following is the bare minimum node: + + pinctrl: pinctrl@f0000e20 { + compatible = "cnxt,cx92755-pinctrl"; + reg = <0xf0000e20 0x100>; + gpio-controller; + #gpio-cells = <2>; + }; + +As a pin controller device, in addition to the required properties, this node +should also contain the pin configuration nodes that client devices reference, +if any. + +For a general description of GPIO bindings, please refer to ../gpio/gpio.txt. + +=== Pin Configuration Node === + +Each pin configuration node is a sub-node of the pin controller node and is a +container of an arbitrary number of subnodes, called pin group nodes in this +document. + +Please refer to the pinctrl-bindings.txt in this directory for details of the +common pinctrl bindings used by client devices, including the definition of a +"pin configuration node". + +=== Pin Group Node === + +A pin group node specifies the desired pin mux for an arbitrary number of +pins. The name of the pin group node is optional and not used. + +A pin group node only affects the properties specified in the node, and has no +effect on any properties that are omitted. + +The pin group node accepts a subset of the generic pin config properties. For +details generic pin config properties, please refer to pinctrl-bindings.txt +and <include/linux/pinctrl/pinconfig-generic.h>. + +Required Pin Group Node Properties: + +- pins: Multiple strings. Specifies the name(s) of one or more pins to be + configured by this node. The format of a pin name string is "GP_xy", where x + is an uppercase character from 'A' to 'R', and y is a digit from 0 to 7. +- function: String. Specifies the pin mux selection. Values must be one of: + "gpio", "client_a", "client_b", "client_c" + +Example: + pinctrl: pinctrl@f0000e20 { + compatible = "cnxt,cx92755-pinctrl"; + reg = <0xf0000e20 0x100>; + + uart0_default: uart0_active { + data_signals { + pins = "GP_O0", "GP_O1"; + function = "client_b"; + }; + }; + }; + + uart0: uart@f0000740 { + compatible = "cnxt,cx92755-usart"; + ... + pinctrl-0 = <&uart0_default>; + pinctrl-names = "default"; + }; + +In the example above, a single pin group configuration node defines the +"client select" for the Rx and Tx signals of uart0. The uart0 node references +that pin configuration node using the &uart0_default phandle. |