linux/drivers/pinctrl, branch v3.4.9

pinctrl: implement pinctrl_check_ops

2012-04-11T07:31:02Z

Most code assumes that the pinctrl ops are present. Validate this when registering a pinctrl driver. Remove the one place in the code that was checking whether one of these non-optional ops was present. Signed-off-by: Stephen Warren Signed-off-by: Linus Walleij

pinctrl: support pinconfig on the U300

2012-03-12T21:49:03Z

This adds pin configuration support for the U300 driver pair, we can now read out the biasing and drive mode in debugfs and configure it using the new configuration API. ChangeLog v1->v2: - Migrate to pin config and generic pin config changes. ChangeLog v2->v3: - Adjust to generic pin config changes in v7 patch set. Signed-off-by: Linus Walleij

pinctrl/coh901: use generic pinconf enums and parameters

2012-03-12T21:49:02Z

Adjust the COH 901 driver to use the standard enums for biasing and driving pins, alter signature of config function to suit the framework. Signed-off-by: Linus Walleij

pinctrl: introduce generic pin config

2012-03-12T21:49:02Z

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_

pinctrl: fix error path in pinconf_map_to_setting()

2012-03-12T21:48:43Z

The code was using the union member setting->data.configs.group_or_pin to store a potential error code, but since that member is unsigned the < 0 comparison was not true, letting errors pass through, ending up as mapped to pin "-22". Fix this up and print the error. Acked-by: Stephen Warren Signed-off-by: Linus Walleij

pinctrl: allow concurrent gpio and mux function ownership of pins

2012-03-12T21:43:09Z

Per recent updates to Documentation/gpio.txt, gpiolib drivers should inform pinctrl when a GPIO is requested. pinctrl then marks that pin as in-use for that GPIO function. When an SoC muxes pins in a group, it's quite possible for the group to contain e.g. 6 pins, but only 4 of them actually be needed by the HW module that's mux'd to them. In this case, the other 2 pins could be used as GPIOs. However, pinctrl marks all the pins within the group as in-use by the selected mux function. To allow the expected gpiolib interaction, separate the concepts of pin ownership into two parts: One for the mux function and one for GPIO usage. Finally, allow those two ownerships to exist in parallel. Signed-off-by: Stephen Warren Signed-off-by: Linus Walleij

Merge branch 'pinctrl-tegra-for-next-diet' into for-next

2012-03-06T22:30:15Z

pinctrl: include machine header to core.h

2012-03-06T22:07:41Z

struct pinctrl_setting contains an enum pinctrl_map_type field, so we need to include machine.h. Also fix kerneldoc to indicate that the pinctrl_setting is about both muxing and other config. Acked-by: Stephen Warren Signed-off-by: Linus Walleij

pinctrl: add a driver for NVIDIA Tegra

2012-03-06T09:51:46Z

This adds a driver for the Tegra pinmux, and required parameterization data for Tegra20 and Tegra30. The driver is initially added with driver name and device tree compatible value that won't cause this driver to be used. A later change will switch the pinctrl driver to use the correct values, switch the old pinmux driver to be disabled, and update all code that uses the old pinmux APIs to use the new pinctrl APIs. Signed-off-by: Stephen Warren Acked-by: Olof Johansson [squashed "fix case of Tegra30's foo_groups[] arrays"] Signed-off-by: Linus Walleij

pinctrl: Show selected function and group in pinmux-pins debugfs

2012-03-05T10:26:01Z

Until recently, the pinctrl pinmux-pins debugfs file displayed the selected function for each owned pin. This feature was removed during restructing in support of recent API rework. This change restoreds this feature, and also displays the group that the function was selected on, in case a pin is a member of multiple groups. Based on work by: Linus Walleij Signed-off-by: Stephen Warren Signed-off-by: Linus Walleij