blob: 41f5f2deb5d6215983012c82e9f827577ed0001c [file] [log] [blame]
Tony Prisk170c6152013-02-20 09:32:19 +13001/*
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);