pinctrl-mxs.h

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/*
 * Copyright 2012 Freescale Semiconductor, Inc.
 *
 * The code contained herein is licensed under the GNU General Public
 * License. You may obtain a copy of the GNU General Public License
 * Version 2 or later at the following locations:
 *
 * http://www.opensource.org/licenses/gpl-license.html
 * http://www.gnu.org/copyleft/gpl.html
 */

#ifndef __PINCTRL_MXS_H
#define __PINCTRL_MXS_H

#include <linux/platform_device.h>
#include <linux/pinctrl/pinctrl.h>

#define SET 0x4
#define CLR 0x8
#define TOG 0xc

#define MXS_PINCTRL_PIN(pin)    PINCTRL_PIN(pin, #pin)
#define PINID(bank, pin)    ((bank) * 32 + (pin))

/*
 * pinmux-id bit field definitions
 *
 * bank:    15..12  (4)
 * pin:     11..4   (8)
 * muxsel:  3..0    (4)
 */
#define MUXID_TO_PINID(m)   PINID((m) >> 12 & 0xf, (m) >> 4 & 0xff)
#define MUXID_TO_MUXSEL(m)  ((m) & 0xf)

#define PINID_TO_BANK(p)    ((p) >> 5)
#define PINID_TO_PIN(p)     ((p) % 32)

/*
 * pin config bit field definitions
 *
 * pull-up: 6..5    (2)
 * voltage: 4..3    (2)
 * mA:      2..0    (3)
 *
 * MSB of each field is presence bit for the config.
 */
#define PULL_PRESENT        (1 << 6)
#define PULL_SHIFT      5
#define VOL_PRESENT     (1 << 4)
#define VOL_SHIFT       3
#define MA_PRESENT      (1 << 2)
#define MA_SHIFT        0
#define CONFIG_TO_PULL(c)   ((c) >> PULL_SHIFT & 0x1)
#define CONFIG_TO_VOL(c)    ((c) >> VOL_SHIFT & 0x1)
#define CONFIG_TO_MA(c)     ((c) >> MA_SHIFT & 0x3)

struct mxs_function {
    const char *name;
    const char **groups;
    unsigned ngroups;
};

struct mxs_group {
    const char *name;
    unsigned int *pins;
    unsigned npins;
    u8 *muxsel;
    u8 config;
};

struct mxs_regs {
    u16 muxsel;
    u16 drive;
    u16 pull;
};

struct mxs_pinctrl_soc_data {
    const struct mxs_regs *regs;
    const struct pinctrl_pin_desc *pins;
    unsigned npins;
    struct mxs_function *functions;
    unsigned nfunctions;
    struct mxs_group *groups;
    unsigned ngroups;
};

int mxs_pinctrl_probe(struct platform_device *pdev,
              struct mxs_pinctrl_soc_data *soc);
int mxs_pinctrl_remove(struct platform_device *pdev);

#endif /* __PINCTRL_MXS_H */