kernel/drivers/pinctrl/vt8500/pinctrl-wmt.h

   1 /*
   2  * Pinctrl driver for the Wondermedia SoC's
   3  *
   4  * Copyright (c) 2013 Tony Prisk <linux@prisktech.co.nz>
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms and conditions of the GNU General Public License,
   8  * version 2, as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13  * more details.
  14  */
  15
  16 #include <linux/gpio.h>
  17
  18 /* VT8500 has no enable register in the extgpio bank. */
  19 #define NO_REG  0xFFFF
  20
  21 #define WMT_PINCTRL_BANK(__en, __dir, __dout, __din, __pen, __pcfg)     \
  22 {                                                                       \
  23         .reg_en         = __en,                                         \
  24         .reg_dir        = __dir,                                        \
  25         .reg_data_out   = __dout,                                       \
  26         .reg_data_in    = __din,                                        \
  27         .reg_pull_en    = __pen,                                        \
  28         .reg_pull_cfg   = __pcfg,                                       \
  29 }
  30
  31 /* Encode/decode the bank/bit pairs into a pin value */
  32 #define WMT_PIN(__bank, __offset)       ((__bank << 5) | __offset)
  33 #define WMT_BANK_FROM_PIN(__pin)        (__pin >> 5)
  34 #define WMT_BIT_FROM_PIN(__pin)         (__pin & 0x1f)
  35
  36 #define WMT_GROUP(__name, __data)               \
  37 {                                               \
  38         .name = __name,                         \
  39         .pins = __data,                         \
  40         .npins = ARRAY_SIZE(__data),            \
  41 }
  42
  43 struct wmt_pinctrl_bank_registers {
  44         u32     reg_en;
  45         u32     reg_dir;
  46         u32     reg_data_out;
  47         u32     reg_data_in;
  48
  49         u32     reg_pull_en;
  50         u32     reg_pull_cfg;
  51 };
  52
  53 struct wmt_pinctrl_group {
  54         const char *name;
  55         const unsigned int *pins;
  56         const unsigned npins;
  57 };
  58
  59 struct wmt_pinctrl_data {
  60         struct device *dev;
  61         struct pinctrl_dev *pctl_dev;
  62
  63         /* must be initialized before calling wmt_pinctrl_probe */
  64         void __iomem *base;
  65         const struct wmt_pinctrl_bank_registers *banks;
  66         const struct pinctrl_pin_desc *pins;
  67         const char * const *groups;
  68
  69         u32 nbanks;
  70         u32 npins;
  71         u32 ngroups;
  72
  73         struct gpio_chip gpio_chip;
  74         struct pinctrl_gpio_range gpio_range;
  75 };
  76
  77 int wmt_pinctrl_probe(struct platform_device *pdev,
  78                       struct wmt_pinctrl_data *data);
  79 int wmt_pinctrl_remove(struct platform_device *pdev);