tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Copyright (c) 2016-2019, The Linux Foundation. All rights reserved.
4 * Copyright (c) 2020 Linaro Ltd.
5 */
6#ifndef __PINCTRL_LPASS_LPI_H__
7#define __PINCTRL_LPASS_LPI_H__
8
9#include <linux/array_size.h>
10#include <linux/bits.h>
11
12#include "../core.h"
13
14struct platform_device;
15
16struct pinctrl_pin_desc;
17
18#define LPI_SLEW_RATE_CTL_REG 0xa000
19#define LPI_TLMM_REG_OFFSET 0x1000
20#define LPI_SLEW_RATE_MAX 0x03
21#define LPI_SLEW_BITS_SIZE 0x02
22#define LPI_SLEW_RATE_MASK GENMASK(1, 0)
23#define LPI_GPIO_CFG_REG 0x00
24#define LPI_GPIO_PULL_MASK GENMASK(1, 0)
25#define LPI_GPIO_FUNCTION_MASK GENMASK(5, 2)
26#define LPI_GPIO_OUT_STRENGTH_MASK GENMASK(8, 6)
27#define LPI_GPIO_OE_MASK BIT(9)
28#define LPI_GPIO_VALUE_REG 0x04
29#define LPI_GPIO_VALUE_IN_MASK BIT(0)
30#define LPI_GPIO_VALUE_OUT_MASK BIT(1)
31
32#define LPI_GPIO_BIAS_DISABLE 0x0
33#define LPI_GPIO_PULL_DOWN 0x1
34#define LPI_GPIO_KEEPER 0x2
35#define LPI_GPIO_PULL_UP 0x3
36#define LPI_GPIO_DS_TO_VAL(v) (v / 2 - 1)
37#define LPI_NO_SLEW -1
38
39#define LPI_FUNCTION(fname) \
40 [LPI_MUX_##fname] = { \
41 .name = #fname, \
42 .groups = fname##_groups, \
43 .ngroups = ARRAY_SIZE(fname##_groups), \
44 }
45
46#define LPI_PINGROUP(id, soff, f1, f2, f3, f4) \
47 { \
48 .pin = id, \
49 .slew_offset = soff, \
50 .funcs = (int[]){ \
51 LPI_MUX_gpio, \
52 LPI_MUX_##f1, \
53 LPI_MUX_##f2, \
54 LPI_MUX_##f3, \
55 LPI_MUX_##f4, \
56 }, \
57 .nfuncs = 5, \
58 .pin_offset = 0, \
59 }
60
61#define LPI_PINGROUP_OFFSET(id, soff, f1, f2, f3, f4, poff) \
62 { \
63 .pin = id, \
64 .slew_offset = soff, \
65 .funcs = (int[]){ \
66 LPI_MUX_gpio, \
67 LPI_MUX_##f1, \
68 LPI_MUX_##f2, \
69 LPI_MUX_##f3, \
70 LPI_MUX_##f4, \
71 }, \
72 .nfuncs = 5, \
73 .pin_offset = poff, \
74 }
75
76/*
77 * Slew rate control is done in the same register as rest of the
78 * pin configuration.
79 */
80#define LPI_FLAG_SLEW_RATE_SAME_REG BIT(0)
81#define LPI_FLAG_USE_PREDEFINED_PIN_OFFSET BIT(1)
82
83struct lpi_pingroup {
84 unsigned int pin;
85 /* Bit offset in slew register for SoundWire pins only */
86 int slew_offset;
87 unsigned int *funcs;
88 unsigned int nfuncs;
89 unsigned int pin_offset;
90};
91
92struct lpi_function {
93 const char *name;
94 const char * const *groups;
95 unsigned int ngroups;
96};
97
98struct lpi_pinctrl_variant_data {
99 const struct pinctrl_pin_desc *pins;
100 int npins;
101 const struct lpi_pingroup *groups;
102 int ngroups;
103 const struct lpi_function *functions;
104 int nfunctions;
105 unsigned int flags;
106};
107
108int lpi_pinctrl_probe(struct platform_device *pdev);
109void lpi_pinctrl_remove(struct platform_device *pdev);
110
111#endif /*__PINCTRL_LPASS_LPI_H__*/