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path: root/drivers/pinctrl/pinconf-generic.c
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* pinctrl: generic: Add bi-directional and output-enableJacopo Mondi2017-04-111-0/+3
| | | | | | | | | | | | | | | | Add bi-directional and output-enable pin configuration properties. bi-directional allows to specify when a pin shall operate in input and output mode at the same time. This is particularly useful in platforms where input and output buffers have to be manually enabled. output-enable is just syntactic sugar to specify that a pin shall operate in output mode, ignoring the provided argument. This pairs with input-enable pin configuration option. Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* pinctrl: Fix spelling typosAndy Shevchenko2017-03-141-1/+1
| | | | | | | Just fix spelling typos in comments. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* pinctrl: generic: Parse pinmux init nodes if node status is okayLaxman Dewangan2016-10-291-1/+1
| | | | | | | | | | | | | During pinmux registration, pinmux table is parsed from DT for making the pinmux table configuration of pins. Parse the only those node whose status is not disabled. This will help on reusing the pin configuration table across platform and disabling the node by status property if that node is not needed on given platform. Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* Merge branch 'devel-dt-free-map' into develLinus Walleij2016-06-231-0/+8
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| * pinctrl: pinconf: Add generic helper function for freeing mappingsJon Hunter2016-06-231-0/+8
| | | | | | | | | | | | | | | | | | The pinconf-generic.h file exposes functions for creating generic mappings but it does not expose a function for freeing the mappings. Add a function for freeing generic mappings. Signed-off-by: Jon Hunter <jonathanh@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* | pinctrl: pinconf: separate config parameters with commas for debugfsMasahiro Yamada2016-05-311-5/+9
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | To improve debugfs readability, use commas instead of whitespaces for separating configuration parameters. For example, the "pinconf-pins" dump on my board will change as follows: Without this commit: # head -5 pinconf-pins Pin config settings per pin Format: pin (name): configs pin 0 (ED0): input bias pull down output drive strength (8 mA) input enabled pin 1 (ED1): input bias pull down output drive strength (8 mA) input enabled pin 2 (ED2): input bias pull down output drive strength (8 mA) input enabled With this commit: # head -5 pinconf-pins Pin config settings per pin Format: pin (name): configs pin 0 (ED0): input bias pull down, output drive strength (8 mA), input enabled pin 1 (ED1): input bias pull down, output drive strength (8 mA), input enabled pin 2 (ED2): input bias pull down, output drive strength (8 mA), input enabled Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* pinctrl: Rename pinctrl_utils_dt_free_map to pinctrl_utils_free_mapIrina Tirdea2016-04-011-1/+1
| | | | | | | | | | | Rename pinctrl_utils_dt_free_map to pinctrl_utils_free_map, since it does not depend on device tree despite the current name. This will enforce a consistent naming in pinctr-utils.c and will make it clear it can be called from outside device tree (e.g. from ACPI handling code). Signed-off-by: Irina Tirdea <irina.tirdea@intel.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* pinctrl: update document for pinconf_generic_parse_dt_configYingjoe Chen2015-12-011-0/+1
| | | | | | | | | The returned configs from pinconf_generic_parse_dt_config() is duplicated from original. Make it clear it must be freed when no longer necessary. Signed-off-by: Yingjoe Chen <yingjoe.chen@mediatek.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* pinctrl: pinconf-generic: add "input-schmitt" DT propertyMasahiro Yamada2015-10-021-0/+1
| | | | | | | | PIN_CONFIG_INPUT_SCHMITT is defined in enum_pin_config_param, but the corresponding DT property is missing. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* pinctrl: pinconf-generic: sort pin configuration params alphabeticallyMasahiro Yamada2015-10-021-17/+17
| | | | | | | | | | | | Currently, the dt_params array in drivers/pinctrl/pinconf-generic.c is not sorted in the same order as the enum pin_config_param in include/linux/pinctrl/pinconf-generic.h. Sort enum pin_config_param, conf_items, dt_params, alphabetically for consistency. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* pinctrl: pinconf-generic: add dt node names to error messagesBaruch Siach2015-03-271-2/+4
| | | | | | | This makes the error message much more useful. Signed-off-by: Baruch Siach <baruch@tkos.co.il> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* pinctrl: pinconf-generic: scan also referenced phandle nodeBaruch Siach2015-03-271-20/+28
| | | | | | | | | | | | | | | | | Make pinconf_generic_dt_node_to_map() also scan the dt pin configuration node directly referenced by phandle, not only its child nodes. The "parent scan" feature needs a few other changes: * Move the pinconf_generic_dt_node_to_map() error handling code to a common place, under the 'exit' label. * Move the pins/groups strings count earlier in pinconf_generic_dt_subnode_to_map(), to allow us to bail out early when these properties are missing or wrong Signed-off-by: Baruch Siach <baruch@tkos.co.il> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* pinctrl: pinconf-generic: loose DT dependenceLinus Walleij2015-01-141-17/+22
| | | | | | | | | | | | | New pin controllers such as ACPI-based may also have custom properties to parse, and should be able to use generic pin config. Let's make the code compile on !OF systems and rename members a bit to underscore it is custom parameters and not necessarily DT parameters. This fixes a build regression for x86_64 on the zeroday kernel builds. Reported-by: kbuild test robot <fengguang.wu@intel.com> Reviewed-and-tested-by: Soren Brinkmann <soren.brinkmann@xilinx.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* pinctrl: pinconf-generic: Allow driver to specify DT paramsSoren Brinkmann2015-01-111-82/+100
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Additionally to the generic DT parameters, allow drivers to provide driver-specific DT parameters to be used with the generic parser infrastructure. To achieve this 'struct pinctrl_desc' is extended to pass custom pinconf option to the core. In order to pass this kind of information, the related data structures - 'struct pinconf_generic_dt_params', 'pin_config_item' - are moved from pinconf internals to the pinconf-generic header. Additionally pinconfg-generic is refactored to not only iterate over the generic pinconf parameters but also take the parameters into account that are provided through the driver's 'struct pinctrl_desc'. In particular 'pinconf_generic_parse_dt_config()' and 'pinconf_generic_dump' helpers are split into two parts each. In order to have a more generic helper that can be used to process the generic parameters as well as the driver-specific ones. v2: - fix typo - add missing documentation for @conf_items member in struct - rebase to pinctrl/devel: conflict in abx500 - rename _pinconf_generic_dump() to pinconf_generic_dump_one() - removed '_' from _parse_dt_cfg() - removed BUG_ONs, error condition is handled in if statements - removed pinconf_generic_dump_group() & pinconf_generic_dump_pin helpers - fixed up corresponding call sites - renamed pinconf_generic_dump() to pinconf_generic_dump_pins() - added kernel-doc to pinconf_generic_dump_pins() - add kernel-doc - more verbose commit message Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com> Tested-by: Andreas Färber <afaerber@suse.de> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* pinctrl: pinconf-generic: Infer map type from DT propertySoren Brinkmann2015-01-111-3/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | With the new 'groups' property, the DT parser can infer the map type from the fact whether 'pins' or 'groups' is used to specify the pin group to work on. To maintain backwards compatibitliy with current usage of the DT binding, this is only done when PIN_MAP_TYPE_INVALID is passed to the parsing function as type. Also, a new helper 'pinconf_generic_dt_node_to_map_all()' is introduced, which can be used by drivers as generic callback for dt_node_to_map() to leverage the new feature. Changes since v2: - rename dt_pin_specifier to subnode_target_type - add additional comment in header file explaining passing an invalid map type - mention map_all() helper in commit message Changes since RFC v2: - none Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com> Tested-by: Andreas Färber <afaerber@suse.de> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* pinctrl: pinconf-generic: Declare dt_params/conf_items constSoren Brinkmann2014-11-111-3/+3
| | | | | Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* pinctrl: pinconf-generic: Add flag to print argumentsSoren Brinkmann2014-10-281-28/+37
| | | | | | | | | | | | | When dumping pinconf information in debugfs, config arguments are only printed when a unit is present and the argument is != 0. For parameters like the slew rate, this does not work. The slew rate uses a driver specific format for the argument, i.e. 0 can be a valid argument and a unit is not provided for it. For that reason, add a flag to enable printing the argument instead of inferring it from the presence of a unit and the value of the argument. Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* pinctrl: Enable "power-source" to be extracted from DT filesIvan T. Ivanov2014-05-281-0/+1
| | | | | | | | | Add "power-source" property to generic options used for DT parsing files. This enables drivers, which use generic pin configurations, to get the value passed to this property. Signed-off-by: Ivan T. Ivanov <iivanov@mm-sol.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* pinctrl: pinconf-generic: Use kmemdup instead of kmalloc + memcpyBenoit Taine2014-05-271-2/+1
| | | | | | | | This issue was reported by coccicheck using the semantic patch at scripts/coccinelle/api/memdup.cocci Signed-off-by: Benoit Taine <benoit.taine@lip6.fr> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* pinctrl: Adds slew-rate, input-enable/disableSherman Yin2013-12-161-0/+4
| | | | | | | | This commit adds slew-rate and input-enable/disable support for pinconf -generic. Signed-off-by: Sherman Yin <syin@broadcom.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* pinctrl: pinconf-generic: Remove ti prefix in dev_err messagesAxel Lin2013-08-291-3/+2
| | | | | | | | It does not make sense to show ti prefix in pinconf_generic_dt_subnode_to_map() dev_err messages. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* pinctrl: utils : add support to pass config type in generic util APIsLaxman Dewangan2013-08-231-4/+5
| | | | | | | | | | | | | | | | | | | Add support to pass the config type like GROUP or PIN when using the utils or generic pin configuration APIs. This will make the APIs more generic. Added additional inline APIs such that it can be use directly as callback for the pinctrl_ops. Changes from V1: - Remove separate implementation for pins and group for pinctrl_utils_dt_free_map and improve this function to support both i.e. PINS and GROUPs. Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-by: Stephen Warren <swarren@nvidia.com> Tested-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* pinctrl: pinconf-generic: add generic APIs for mapping pinctrl nodeLaxman Dewangan2013-08-141-0/+96
| | | | | | | | | | | | | | | | | | | | Add generic APIs to map the DT node and its sub node in pinconf generic driver. These APIs can be used from driver to parse the DT node who uses the pinconf generic APIs for defining their nodes. Changes from V1: - Add generic property for pins and functions in pinconf-generic. - Add APIs to map the DT and subnode. - Move common utils APIs to the pinctrl-utils from this file. - Update the binding document accordingly. Changes from V2: - Rebased the pinctrl binding doc on top of Stephen's cleanup. - Rename properties "pinctrl-pins" and "pinctrl-function" to "pins" and "function". Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* pinctrl: remove bindings for pinconf options needing more thoughtHeiko Stübner2013-06-251-3/+0
| | | | | | | | | | | | | Some options currently take arguments in unspecified driver-specific units. As pointed out by Stephen Warren, driver specific values should not be part of generic devicetree bindings describing the hardware. Therefore remove the critical bindings again, before they become part of an official release. Signed-off-by: Heiko Stuebner <heiko@sntech.de> Reviewed-by: James Hogan <james.hogan@imgtec.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* pinctrl: set unit for debounce time pinconfig to usecHeiko Stübner2013-06-251-1/+1
| | | | | | | | | | | | Currently the debounce time pinconfig option uses an unspecified "time units" unit. As pinconfig options should use SI units and a real unit is also necessary for generic dt bindings, change it to usec. Currently no driver is using the generic pinconfig option for this, so the unit change is safe to do. Signed-off-by: Heiko Stuebner <heiko@sntech.de> Reviewed-by: James Hogan <james.hogan@imgtec.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* pinctrl: dynamically alloc temp array when parsing dt pinconf optionsHeiko Stübner2013-06-171-6/+18
| | | | | | | | | | | Allocating the temorary array in pinconf_generic_parse_dt_config on stack might cause problems later on, when the number of options grows over time. Therefore also allocate this array dynamically to be on the safe side. Suggested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Heiko Stuebner <heiko@sntech.de> Reviewed-by: James Hogan <james.hogan@imgtec.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* pinctrl: handle zero found dt pinconfig properties betterHeiko Stübner2013-06-171-0/+7
| | | | | | | | | | This adds a shortcut when no valid pinconf properties are found in the parsed dt node, to set the values immediately and return. Suggested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Heiko Stuebner <heiko@sntech.de> Reviewed-by: James Hogan <james.hogan@imgtec.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* pinctrl: clarify some dt pinconfig optionsHeiko Stübner2013-06-171-4/+5
| | | | | | | | | | | | | | The bias-pull-* options use values > 0 to indicate that the pull should be activated and optionally also indicate the strength of the pull. Therefore use an default value of 1 for these options. Split the low-power-mode option into low-power-enable and -disable. Update the documentation to describe the param arguments better. Reported-by: James Hogan <james.hogan@imgtec.com> Signed-off-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* pinctrl: add function to parse generic pinconfig properties from a dt nodeHeiko Stübner2013-06-161-0/+81
| | | | | | | | | | | | pinconf_generic_parse_dt_config() takes a node as input and generates an array of generic pinconfig values from the properties of this node. As I couldn't find a mechanism to count the number of properties of a node the function uses internally an array to accept one of parameter and copies the real present options to a smaller variable at its end. Signed-off-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* pinctrl: add pinconf-generic define for a pin-default pullHeiko Stübner2013-06-161-0/+2
| | | | | | | | | | | | | | | There exist controllers that don't support to set the pull to up or down separately but instead automatically set the pull direction based on embedded knowledge inside the controller, for example depending on the selected mux function of the pin. Therefore this patch adds another config option to use this default pull-state for a pin where it is not possible to know or decide if the pin will be pulled up or down. Signed-off-by: Heiko Stuebner <heiko@sntech.de> Reviewed-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* pinconf-generic: add BIAS_BUS_HOLD pinconfJames Hogan2013-06-161-0/+1
| | | | | | | | | | | | Add a new PIN_CONFIG_BIAS_BUS_HOLD pin configuration for a bus holder pin mode (also known as bus keeper, or repeater). This is a weak latch which drives the last value on a tristate bus. Another device on the bus can drive the bus high or low before going tristate to change the value driven by the pin. Signed-off-by: James Hogan <james.hogan@imgtec.com> Cc: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* pinconf-generic: add drive strength to debugfs outputJames Hogan2013-06-161-0/+1
| | | | | | | | Add the drive strength pinconf to debugfs output (with the unit "mA"). Signed-off-by: James Hogan <james.hogan@imgtec.com> Cc: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* pinctrl: generic: Fix checkpatch errorsSachin Kamat2013-03-271-3/+3
| | | | | | | | Fixes the following type of checkpatch errors: ERROR: space required before the open parenthesis '(' Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* pinctrl: generic: Make 'conf_items' staticSachin Kamat2013-03-271-1/+1
| | | | | | | | | | 'conf_items' is used only in this file. Silences the below sparse warning: drivers/pinctrl/pinconf-generic.c:37:24: warning: symbol 'conf_items' was not declared. Should it be static? Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* pinctrl: generic: dump pin configurationHaojian Zhuang2013-03-071-0/+14
| | | | | | | Add the support of dumping pin configuration. Signed-off-by: Haojian Zhuang <haojian.zhuang@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* pinctrl: generic: rename input schmitt disableHaojian Zhuang2013-02-151-1/+1
| | | | | | | | | Rename PIN_CONFIG_INPUT_SCHMITT_DISABLE to PIN_CONFIG_INPUT_SCHMITT_ENABLE. It's used to make it more generialize. Signed-off-by: Haojian Zhuang <haojian.zhuang@linaro.org> Acked-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* pinctrl: generic: add slew rate config parameterHaojian Zhuang2013-01-211-0/+1
| | | | | | | Add PIN_CONFIG_SLEW_RATE parameter into pinconf-generic driver. Signed-off-by: Haojian Zhuang <haojian.zhuang@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* pinctrl: add pinconf-generic defines for outputLinus Walleij2013-01-111-0/+1
| | | | | | | | | | | | | | | This adds a definition of a generic output configuration for a certain pin when using the generic pin configuration library. Whereas driving pins low/high is usually a GPIO business, you may want to set up pins into a default state using hogs, and never touch them again. This helps out with that scenario. Based on a patch from Patrice Chotard. Signed-off-by: Patrice Chotard <patrice.chotard@stericsson.com> Reviewed-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* pinctrl: generic: add input schmitt disable parameterHaojian Zhuang2012-11-211-0/+1
| | | | | | | | In Marvell PXA/MMP silicons, input schmitt disable value is 0x40, not 0. So append new config parameter -- input schmitt disable. Signed-off-by: Haojian Zhuang <haojian.zhuang@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* pinctrl: introduce generic pin configLinus Walleij2012-03-121-0/+120
This is a split-off from the earlier patch set which adds generic pin configuration for the pin controllers that want it. Since we may have a system with mixed generic and custom pin controllers, we pass a boolean in the pin controller ops vtable to indicate if it is generic. ChangeLog v1->v5: - Follow parent patch versioning number system. - Document the semantic meaning of return values from pin config get functions, so we can iterate over pins and check their properties from debugfs as part of the generic config code. - Use proper cast functions in the generic debugfs pin config file. - Expand generic config to optionally cover groups too. ChangeLog v5->v6: - Update to match underlying changes. ChangeLog v6->v7: - Drop DRIVE_OFF parameter, use bias high impedance for this - Delete argument for drive modes push-pull, od and os. These are now just state transitions. - Delete slew rate rising/falling due to discussions on on proper semantics - Drop config wakeup, struct irq_chip does this for now, add back if need be. - Set PIN_CONFIG_END to 0x7fff making room for custom config parameters from 0x8000 and up. - Prefix accessor functions with pinconf_
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