394349f778
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_
64 lines
2.2 KiB
C
64 lines
2.2 KiB
C
/*
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* Interface the pinconfig portions of the pinctrl subsystem
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*
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* Copyright (C) 2011 ST-Ericsson SA
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* Written on behalf of Linaro for ST-Ericsson
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* This interface is used in the core to keep track of pins.
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*
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* Author: Linus Walleij <linus.walleij@linaro.org>
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*
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* License terms: GNU General Public License (GPL) version 2
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*/
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#ifndef __LINUX_PINCTRL_PINCONF_H
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#define __LINUX_PINCTRL_PINCONF_H
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#ifdef CONFIG_PINCONF
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struct pinctrl_dev;
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struct seq_file;
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/**
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* struct pinconf_ops - pin config operations, to be implemented by
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* pin configuration capable drivers.
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* @is_generic: for pin controllers that want to use the generic interface,
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* this flag tells the framework that it's generic.
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* @pin_config_get: get the config of a certain pin, if the requested config
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* is not available on this controller this should return -ENOTSUPP
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* and if it is available but disabled it should return -EINVAL
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* @pin_config_get: get the config of a certain pin
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* @pin_config_set: configure an individual pin
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* @pin_config_group_get: get configurations for an entire pin group
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* @pin_config_group_set: configure all pins in a group
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* @pin_config_dbg_show: optional debugfs display hook that will provide
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* per-device info for a certain pin in debugfs
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* @pin_config_group_dbg_show: optional debugfs display hook that will provide
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* per-device info for a certain group in debugfs
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*/
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struct pinconf_ops {
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#ifdef CONFIG_GENERIC_PINCONF
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bool is_generic;
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#endif
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int (*pin_config_get) (struct pinctrl_dev *pctldev,
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unsigned pin,
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unsigned long *config);
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int (*pin_config_set) (struct pinctrl_dev *pctldev,
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unsigned pin,
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unsigned long config);
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int (*pin_config_group_get) (struct pinctrl_dev *pctldev,
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unsigned selector,
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unsigned long *config);
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int (*pin_config_group_set) (struct pinctrl_dev *pctldev,
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unsigned selector,
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unsigned long config);
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void (*pin_config_dbg_show) (struct pinctrl_dev *pctldev,
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struct seq_file *s,
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unsigned offset);
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void (*pin_config_group_dbg_show) (struct pinctrl_dev *pctldev,
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struct seq_file *s,
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unsigned selector);
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};
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#endif
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#endif /* __LINUX_PINCTRL_PINCONF_H */
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