pinctrl-intel.h
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/*
* Core pinctrl/GPIO driver for Intel GPIO controllers
*
* Copyright (C) 2015, Intel Corporation
* Authors: Mathias Nyman <mathias.nyman@linux.intel.com>
* Mika Westerberg <mika.westerberg@linux.intel.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef PINCTRL_INTEL_H
#define PINCTRL_INTEL_H
struct pinctrl_pin_desc;
struct platform_device;
struct device;
/**
* struct intel_pingroup - Description about group of pins
* @name: Name of the groups
* @pins: All pins in this group
* @npins: Number of pins in this groups
* @mode: Native mode in which the group is muxed out @pins. Used if @modes
* is %NULL.
* @modes: If not %NULL this will hold mode for each pin in @pins
*/
struct intel_pingroup {
const char *name;
const unsigned *pins;
size_t npins;
unsigned short mode;
const unsigned *modes;
};
/**
* struct intel_function - Description about a function
* @name: Name of the function
* @groups: An array of groups for this function
* @ngroups: Number of groups in @groups
*/
struct intel_function {
const char *name;
const char * const *groups;
size_t ngroups;
};
/**
* struct intel_padgroup - Hardware pad group information
* @reg_num: GPI_IS register number
* @base: Starting pin of this group
* @size: Size of this group (maximum is 32).
* @padown_num: PAD_OWN register number (assigned by the core driver)
*
* If pad groups of a community are not the same size, use this structure
* to specify them.
*/
struct intel_padgroup {
unsigned reg_num;
unsigned base;
unsigned size;
unsigned padown_num;
};
/**
* struct intel_community - Intel pin community description
* @barno: MMIO BAR number where registers for this community reside
* @padown_offset: Register offset of PAD_OWN register from @regs. If %0
* then there is no support for owner.
* @padcfglock_offset: Register offset of PADCFGLOCK from @regs. If %0 then
* locking is not supported.
* @hostown_offset: Register offset of HOSTSW_OWN from @regs. If %0 then it
* is assumed that the host owns the pin (rather than
* ACPI).
* @ie_offset: Register offset of GPI_IE from @regs.
* @pin_base: Starting pin of pins in this community
* @gpp_size: Maximum number of pads in each group, such as PADCFGLOCK,
* HOSTSW_OWN, GPI_IS, GPI_IE, etc. Used when @gpps is %NULL.
* @gpp_num_padown_regs: Number of pad registers each pad group consumes at
* minimum. Use %0 if the number of registers can be
* determined by the size of the group.
* @npins: Number of pins in this community
* @features: Additional features supported by the hardware
* @gpps: Pad groups if the controller has variable size pad groups
* @ngpps: Number of pad groups in this community
* @regs: Community specific common registers (reserved for core driver)
* @pad_regs: Community specific pad registers (reserved for core driver)
*
* Most Intel GPIO host controllers this driver supports each pad group is
* of equal size (except the last one). In that case the driver can just
* fill in @gpp_size field and let the core driver to handle the rest. If
* the controller has pad groups of variable size the client driver can
* pass custom @gpps and @ngpps instead.
*/
struct intel_community {
unsigned barno;
unsigned padown_offset;
unsigned padcfglock_offset;
unsigned hostown_offset;
unsigned ie_offset;
unsigned pin_base;
unsigned gpp_size;
unsigned gpp_num_padown_regs;
size_t npins;
unsigned features;
const struct intel_padgroup *gpps;
size_t ngpps;
/* Reserved for the core driver */
void __iomem *regs;
void __iomem *pad_regs;
};
/* Additional features supported by the hardware */
#define PINCTRL_FEATURE_DEBOUNCE BIT(0)
#define PINCTRL_FEATURE_1K_PD BIT(1)
/**
* PIN_GROUP - Declare a pin group
* @n: Name of the group
* @p: An array of pins this group consists
* @m: Mode which the pins are put when this group is active. Can be either
* a single integer or an array of integers in which case mode is per
* pin.
*/
#define PIN_GROUP(n, p, m) \
{ \
.name = (n), \
.pins = (p), \
.npins = ARRAY_SIZE((p)), \
.mode = __builtin_choose_expr( \
__builtin_constant_p((m)), (m), 0), \
.modes = __builtin_choose_expr( \
__builtin_constant_p((m)), NULL, (m)), \
}
#define FUNCTION(n, g) \
{ \
.name = (n), \
.groups = (g), \
.ngroups = ARRAY_SIZE((g)), \
}
/**
* struct intel_pinctrl_soc_data - Intel pin controller per-SoC configuration
* @uid: ACPI _UID for the probe driver use if needed
* @pins: Array if pins this pinctrl controls
* @npins: Number of pins in the array
* @groups: Array of pin groups
* @ngroups: Number of groups in the array
* @functions: Array of functions
* @nfunctions: Number of functions in the array
* @communities: Array of communities this pinctrl handles
* @ncommunities: Number of communities in the array
*
* The @communities is used as a template by the core driver. It will make
* copy of all communities and fill in rest of the information.
*/
struct intel_pinctrl_soc_data {
const char *uid;
const struct pinctrl_pin_desc *pins;
size_t npins;
const struct intel_pingroup *groups;
size_t ngroups;
const struct intel_function *functions;
size_t nfunctions;
const struct intel_community *communities;
size_t ncommunities;
};
int intel_pinctrl_probe(struct platform_device *pdev,
const struct intel_pinctrl_soc_data *soc_data);
#ifdef CONFIG_PM_SLEEP
int intel_pinctrl_suspend(struct device *dev);
int intel_pinctrl_resume(struct device *dev);
#endif
#endif /* PINCTRL_INTEL_H */