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