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/*
* Driver header file for the ST Microelectronics SPEAr pinmux
*
* Copyright (C) 2012 ST Microelectronics
* Viresh Kumar <viresh.kumar@st.com>
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#ifndef __PINMUX_SPEAR_H__
#define __PINMUX_SPEAR_H__
#include <linux/pinctrl/pinctrl.h>
#include <linux/types.h>
struct platform_device;
struct device;
/**
* struct spear_pmx_mode - SPEAr pmx mode
* @name: name of pmx mode
* @mode: mode id
* @reg: register for configuring this mode
* @mask: mask of this mode in reg
* @val: val to be configured at reg after doing (val & mask)
*/
struct spear_pmx_mode {
const char *const name;
u16 mode;
u16 reg;
u16 mask;
u32 val;
};
/**
* struct spear_muxreg - SPEAr mux reg configuration
* @reg: register offset
* @mask: mask bits
* @val: val to be written on mask bits
*/
struct spear_muxreg {
u16 reg;
u32 mask;
u32 val;
};
/**
* struct spear_modemux - SPEAr mode mux configuration
* @modes: mode ids supported by this group of muxregs
* @nmuxregs: number of muxreg configurations to be done for modes
* @muxregs: array of muxreg configurations to be done for modes
*/
struct spear_modemux {
u16 modes;
u8 nmuxregs;
struct spear_muxreg *muxregs;
};
/**
* struct spear_pingroup - SPEAr pin group configurations
* @name: name of pin group
* @pins: array containing pin numbers
* @npins: size of pins array
* @modemuxs: array of modemux configurations for this pin group
* @nmodemuxs: size of array modemuxs
*
* A representation of a group of pins in the SPEAr pin controller. Each group
* allows some parameter or parameters to be configured.
*/
struct spear_pingroup {
const char *name;
const unsigned *pins;
unsigned npins;
struct spear_modemux *modemuxs;
unsigned nmodemuxs;
};
/**
* struct spear_function - SPEAr pinctrl mux function
* @name: The name of the function, exported to pinctrl core.
* @groups: An array of pin groups that may select this function.
* @ngroups: The number of entries in @groups.
*/
struct spear_function {
const char *name;
const char *const *groups;
unsigned ngroups;
};
/**
* struct spear_pinctrl_machdata - SPEAr pin controller machine driver
* configuration
* @pins: An array describing all pins the pin controller affects.
* All pins which are also GPIOs must be listed first within the *array,
* and be numbered identically to the GPIO controller's *numbering.
* @npins: The numbmer of entries in @pins.
* @functions: An array describing all mux functions the SoC supports.
* @nfunctions: The numbmer of entries in @functions.
* @groups: An array describing all pin groups the pin SoC supports.
* @ngroups: The numbmer of entries in @groups.
*
* @modes_supported: Does SoC support modes
* @mode: mode configured from probe
* @pmx_modes: array of modes supported by SoC
* @npmx_modes: number of entries in pmx_modes.
*/
struct spear_pinctrl_machdata {
const struct pinctrl_pin_desc *pins;
unsigned npins;
struct spear_function **functions;
unsigned nfunctions;
struct spear_pingroup **groups;
unsigned ngroups;
bool modes_supported;
u16 mode;
struct spear_pmx_mode **pmx_modes;
unsigned npmx_modes;
};
/**
* struct spear_pmx - SPEAr pinctrl mux
* @dev: pointer to struct dev of platform_device registered
* @pctl: pointer to struct pinctrl_dev
* @machdata: pointer to SoC or machine specific structure
* @vbase: virtual base address of pinmux controller
*/
struct spear_pmx {
struct device *dev;
struct pinctrl_dev *pctl;
struct spear_pinctrl_machdata *machdata;
void __iomem *vbase;
};
/* exported routines */
void __devinit pmx_init_addr(struct spear_pinctrl_machdata *machdata, u16 reg);
int __devinit spear_pinctrl_probe(struct platform_device *pdev,
struct spear_pinctrl_machdata *machdata);
int __devexit spear_pinctrl_remove(struct platform_device *pdev);
#endif /* __PINMUX_SPEAR_H__ */
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