1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
|
// SPDX-License-Identifier: GPL-2.0
/*
* Microchip KSZ9477 series register access through SPI
*
* Copyright (C) 2017-2019 Microchip Technology Inc.
*/
#include <asm/unaligned.h>
#include <linux/delay.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/regmap.h>
#include <linux/spi/spi.h>
#include "ksz_common.h"
#define SPI_ADDR_SHIFT 24
#define SPI_ADDR_ALIGN 3
#define SPI_TURNAROUND_SHIFT 5
KSZ_REGMAP_TABLE(ksz9477, 32, SPI_ADDR_SHIFT,
SPI_TURNAROUND_SHIFT, SPI_ADDR_ALIGN);
static int ksz9477_spi_probe(struct spi_device *spi)
{
struct regmap_config rc;
struct ksz_device *dev;
int i, ret;
dev = ksz_switch_alloc(&spi->dev, spi);
if (!dev)
return -ENOMEM;
for (i = 0; i < ARRAY_SIZE(ksz9477_regmap_config); i++) {
rc = ksz9477_regmap_config[i];
rc.lock_arg = &dev->regmap_mutex;
dev->regmap[i] = devm_regmap_init_spi(spi, &rc);
if (IS_ERR(dev->regmap[i])) {
ret = PTR_ERR(dev->regmap[i]);
dev_err(&spi->dev,
"Failed to initialize regmap%i: %d\n",
ksz9477_regmap_config[i].val_bits, ret);
return ret;
}
}
if (spi->dev.platform_data)
dev->pdata = spi->dev.platform_data;
/* setup spi */
spi->mode = SPI_MODE_3;
ret = spi_setup(spi);
if (ret)
return ret;
ret = ksz9477_switch_register(dev);
/* Main DSA driver may not be started yet. */
if (ret)
return ret;
spi_set_drvdata(spi, dev);
return 0;
}
static int ksz9477_spi_remove(struct spi_device *spi)
{
struct ksz_device *dev = spi_get_drvdata(spi);
if (dev)
ksz_switch_remove(dev);
spi_set_drvdata(spi, NULL);
return 0;
}
static void ksz9477_spi_shutdown(struct spi_device *spi)
{
struct ksz_device *dev = spi_get_drvdata(spi);
if (dev)
dsa_switch_shutdown(dev->ds);
spi_set_drvdata(spi, NULL);
}
static const struct of_device_id ksz9477_dt_ids[] = {
{ .compatible = "microchip,ksz9477" },
{ .compatible = "microchip,ksz9897" },
{ .compatible = "microchip,ksz9893" },
{ .compatible = "microchip,ksz9563" },
{ .compatible = "microchip,ksz8563" },
{ .compatible = "microchip,ksz9567" },
{},
};
MODULE_DEVICE_TABLE(of, ksz9477_dt_ids);
static const struct spi_device_id ksz9477_spi_ids[] = {
{ "ksz9477" },
{ "ksz9897" },
{ "ksz9893" },
{ "ksz9563" },
{ "ksz8563" },
{ "ksz9567" },
{ },
};
MODULE_DEVICE_TABLE(spi, ksz9477_spi_ids);
static struct spi_driver ksz9477_spi_driver = {
.driver = {
.name = "ksz9477-switch",
.owner = THIS_MODULE,
.of_match_table = of_match_ptr(ksz9477_dt_ids),
},
.id_table = ksz9477_spi_ids,
.probe = ksz9477_spi_probe,
.remove = ksz9477_spi_remove,
.shutdown = ksz9477_spi_shutdown,
};
module_spi_driver(ksz9477_spi_driver);
MODULE_ALIAS("spi:ksz9477");
MODULE_ALIAS("spi:ksz9897");
MODULE_ALIAS("spi:ksz9893");
MODULE_ALIAS("spi:ksz9563");
MODULE_ALIAS("spi:ksz8563");
MODULE_ALIAS("spi:ksz9567");
MODULE_AUTHOR("Woojung Huh <Woojung.Huh@microchip.com>");
MODULE_DESCRIPTION("Microchip KSZ9477 Series Switch SPI access Driver");
MODULE_LICENSE("GPL");
|
