f07512e615
This update adds a debugfs interface to modify a pin configuration for a given state in the pinctrl map. This allows to modify the configuration for a non-active state, typically sleep state. This configuration is not applied right away, but only when the state will be entered. This solution is mandated for us by HW validation: in order to test and verify several pin configurations during sleep without recompiling the software. Change log in this patch set; Take into account latest feedback from Stephen Warren: - stale comments update - improved code efficiency and readibility - limit size of global variable pinconf_dbg_conf - remove req_type as it can easily be added later when add/delete requests support is implemented Signed-off-by: Laurent Meunier <laurent.meunier@st.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
74 lines
2.6 KiB
C
74 lines
2.6 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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#include <linux/pinctrl/machine.h>
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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_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_group_dbg_set: optional debugfs to modify a pin configuration
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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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* @pin_config_config_dbg_show: optional debugfs display hook that will decode
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* and display a driver's pin configuration parameter
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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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int (*pin_config_dbg_parse_modify) (struct pinctrl_dev *pctldev,
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const char *arg,
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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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void (*pin_config_config_dbg_show) (struct pinctrl_dev *pctldev,
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struct seq_file *s,
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unsigned long config);
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};
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#endif
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#endif /* __LINUX_PINCTRL_PINCONF_H */
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