drivers/pinctrl/pinctrl-mxs.h

   1 /*
   2  * Copyright 2012 Freescale Semiconductor, Inc.
   3  *
   4  * The code contained herein is licensed under the GNU General Public
   5  * License. You may obtain a copy of the GNU General Public License
   6  * Version 2 or later at the following locations:
   7  *
   8  * http://www.opensource.org/licenses/gpl-license.html
   9  * http://www.gnu.org/copyleft/gpl.html
  10  */
  11
  12 #ifndef __PINCTRL_MXS_H
  13 #define __PINCTRL_MXS_H
  14
  15 #include <linux/platform_device.h>
  16 #include <linux/pinctrl/pinctrl.h>
  17
  18 #define SET     0x4
  19 #define CLR     0x8
  20 #define TOG     0xc
  21
  22 #define MXS_PINCTRL_PIN(pin)    PINCTRL_PIN(pin, #pin)
  23 #define PINID(bank, pin)        ((bank) * 32 + (pin))
  24
  25 /*
  26  * pinmux-id bit field definitions
  27  *
  28  * bank:        15..12  (4)
  29  * pin:         11..4   (8)
  30  * muxsel:      3..0    (4)
  31  */
  32 #define MUXID_TO_PINID(m)       PINID((m) >> 12 & 0xf, (m) >> 4 & 0xff)
  33 #define MUXID_TO_MUXSEL(m)      ((m) & 0xf)
  34
  35 #define PINID_TO_BANK(p)        ((p) >> 5)
  36 #define PINID_TO_PIN(p)         ((p) % 32)
  37
  38 /*
  39  * pin config bit field definitions
  40  *
  41  * pull-up:     6..5    (2)
  42  * voltage:     4..3    (2)
  43  * mA:          2..0    (3)
  44  *
  45  * MSB of each field is presence bit for the config.
  46  */
  47 #define PULL_PRESENT            (1 << 6)
  48 #define PULL_SHIFT              5
  49 #define VOL_PRESENT             (1 << 4)
  50 #define VOL_SHIFT               3
  51 #define MA_PRESENT              (1 << 2)
  52 #define MA_SHIFT                0
  53 #define CONFIG_TO_PULL(c)       ((c) >> PULL_SHIFT & 0x1)
  54 #define CONFIG_TO_VOL(c)        ((c) >> VOL_SHIFT & 0x1)
  55 #define CONFIG_TO_MA(c)         ((c) >> MA_SHIFT & 0x3)
  56
  57 struct mxs_function {
  58         const char *name;
  59         const char **groups;
  60         unsigned ngroups;
  61 };
  62
  63 struct mxs_group {
  64         const char *name;
  65         unsigned int *pins;
  66         unsigned npins;
  67         u8 *muxsel;
  68         u8 config;
  69 };
  70
  71 struct mxs_regs {
  72         u16 muxsel;
  73         u16 drive;
  74         u16 pull;
  75 };
  76
  77 struct mxs_pinctrl_soc_data {
  78         const struct mxs_regs *regs;
  79         const struct pinctrl_pin_desc *pins;
  80         unsigned npins;
  81         struct mxs_function *functions;
  82         unsigned nfunctions;
  83         struct mxs_group *groups;
  84         unsigned ngroups;
  85 };
  86
  87 int mxs_pinctrl_probe(struct platform_device *pdev,
  88                       struct mxs_pinctrl_soc_data *soc);
  89 int mxs_pinctrl_remove(struct platform_device *pdev);
  90
  91 #endif /* __PINCTRL_MXS_H */