LXR linux/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
  43struct 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
  53struct wmt_pinctrl_group {
  54        const char *name;
  55        const unsigned int *pins;
  56        const unsigned npins;
  57};
  58
  59struct 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
  77int wmt_pinctrl_probe(struct platform_device *pdev,
  78                      struct wmt_pinctrl_data *data);
  79int wmt_pinctrl_remove(struct platform_device *pdev);
  80