1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Microchip KSZ9477 series register access through SPI
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (C) 2017-2019 Microchip Technology Inc.
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #include <asm/unaligned.h>
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun #include <linux/delay.h>
11*4882a593Smuzhiyun #include <linux/kernel.h>
12*4882a593Smuzhiyun #include <linux/module.h>
13*4882a593Smuzhiyun #include <linux/regmap.h>
14*4882a593Smuzhiyun #include <linux/spi/spi.h>
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun #include "ksz_common.h"
17*4882a593Smuzhiyun
18*4882a593Smuzhiyun #define SPI_ADDR_SHIFT 24
19*4882a593Smuzhiyun #define SPI_ADDR_ALIGN 3
20*4882a593Smuzhiyun #define SPI_TURNAROUND_SHIFT 5
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun KSZ_REGMAP_TABLE(ksz9477, 32, SPI_ADDR_SHIFT,
23*4882a593Smuzhiyun SPI_TURNAROUND_SHIFT, SPI_ADDR_ALIGN);
24*4882a593Smuzhiyun
ksz9477_spi_probe(struct spi_device * spi)25*4882a593Smuzhiyun static int ksz9477_spi_probe(struct spi_device *spi)
26*4882a593Smuzhiyun {
27*4882a593Smuzhiyun struct regmap_config rc;
28*4882a593Smuzhiyun struct ksz_device *dev;
29*4882a593Smuzhiyun int i, ret;
30*4882a593Smuzhiyun
31*4882a593Smuzhiyun dev = ksz_switch_alloc(&spi->dev, spi);
32*4882a593Smuzhiyun if (!dev)
33*4882a593Smuzhiyun return -ENOMEM;
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun for (i = 0; i < ARRAY_SIZE(ksz9477_regmap_config); i++) {
36*4882a593Smuzhiyun rc = ksz9477_regmap_config[i];
37*4882a593Smuzhiyun rc.lock_arg = &dev->regmap_mutex;
38*4882a593Smuzhiyun dev->regmap[i] = devm_regmap_init_spi(spi, &rc);
39*4882a593Smuzhiyun if (IS_ERR(dev->regmap[i])) {
40*4882a593Smuzhiyun ret = PTR_ERR(dev->regmap[i]);
41*4882a593Smuzhiyun dev_err(&spi->dev,
42*4882a593Smuzhiyun "Failed to initialize regmap%i: %d\n",
43*4882a593Smuzhiyun ksz9477_regmap_config[i].val_bits, ret);
44*4882a593Smuzhiyun return ret;
45*4882a593Smuzhiyun }
46*4882a593Smuzhiyun }
47*4882a593Smuzhiyun
48*4882a593Smuzhiyun if (spi->dev.platform_data)
49*4882a593Smuzhiyun dev->pdata = spi->dev.platform_data;
50*4882a593Smuzhiyun
51*4882a593Smuzhiyun ret = ksz9477_switch_register(dev);
52*4882a593Smuzhiyun
53*4882a593Smuzhiyun /* Main DSA driver may not be started yet. */
54*4882a593Smuzhiyun if (ret)
55*4882a593Smuzhiyun return ret;
56*4882a593Smuzhiyun
57*4882a593Smuzhiyun spi_set_drvdata(spi, dev);
58*4882a593Smuzhiyun
59*4882a593Smuzhiyun return 0;
60*4882a593Smuzhiyun }
61*4882a593Smuzhiyun
ksz9477_spi_remove(struct spi_device * spi)62*4882a593Smuzhiyun static int ksz9477_spi_remove(struct spi_device *spi)
63*4882a593Smuzhiyun {
64*4882a593Smuzhiyun struct ksz_device *dev = spi_get_drvdata(spi);
65*4882a593Smuzhiyun
66*4882a593Smuzhiyun if (dev)
67*4882a593Smuzhiyun ksz_switch_remove(dev);
68*4882a593Smuzhiyun
69*4882a593Smuzhiyun return 0;
70*4882a593Smuzhiyun }
71*4882a593Smuzhiyun
ksz9477_spi_shutdown(struct spi_device * spi)72*4882a593Smuzhiyun static void ksz9477_spi_shutdown(struct spi_device *spi)
73*4882a593Smuzhiyun {
74*4882a593Smuzhiyun struct ksz_device *dev = spi_get_drvdata(spi);
75*4882a593Smuzhiyun
76*4882a593Smuzhiyun if (dev && dev->dev_ops->shutdown)
77*4882a593Smuzhiyun dev->dev_ops->shutdown(dev);
78*4882a593Smuzhiyun }
79*4882a593Smuzhiyun
80*4882a593Smuzhiyun static const struct of_device_id ksz9477_dt_ids[] = {
81*4882a593Smuzhiyun { .compatible = "microchip,ksz9477" },
82*4882a593Smuzhiyun { .compatible = "microchip,ksz9897" },
83*4882a593Smuzhiyun { .compatible = "microchip,ksz9893" },
84*4882a593Smuzhiyun { .compatible = "microchip,ksz9563" },
85*4882a593Smuzhiyun { .compatible = "microchip,ksz8563" },
86*4882a593Smuzhiyun { .compatible = "microchip,ksz9567" },
87*4882a593Smuzhiyun {},
88*4882a593Smuzhiyun };
89*4882a593Smuzhiyun MODULE_DEVICE_TABLE(of, ksz9477_dt_ids);
90*4882a593Smuzhiyun
91*4882a593Smuzhiyun static const struct spi_device_id ksz9477_spi_ids[] = {
92*4882a593Smuzhiyun { "ksz9477" },
93*4882a593Smuzhiyun { "ksz9897" },
94*4882a593Smuzhiyun { "ksz9893" },
95*4882a593Smuzhiyun { "ksz9563" },
96*4882a593Smuzhiyun { "ksz8563" },
97*4882a593Smuzhiyun { "ksz9567" },
98*4882a593Smuzhiyun { },
99*4882a593Smuzhiyun };
100*4882a593Smuzhiyun MODULE_DEVICE_TABLE(spi, ksz9477_spi_ids);
101*4882a593Smuzhiyun
102*4882a593Smuzhiyun static struct spi_driver ksz9477_spi_driver = {
103*4882a593Smuzhiyun .driver = {
104*4882a593Smuzhiyun .name = "ksz9477-switch",
105*4882a593Smuzhiyun .owner = THIS_MODULE,
106*4882a593Smuzhiyun .of_match_table = of_match_ptr(ksz9477_dt_ids),
107*4882a593Smuzhiyun },
108*4882a593Smuzhiyun .id_table = ksz9477_spi_ids,
109*4882a593Smuzhiyun .probe = ksz9477_spi_probe,
110*4882a593Smuzhiyun .remove = ksz9477_spi_remove,
111*4882a593Smuzhiyun .shutdown = ksz9477_spi_shutdown,
112*4882a593Smuzhiyun };
113*4882a593Smuzhiyun
114*4882a593Smuzhiyun module_spi_driver(ksz9477_spi_driver);
115*4882a593Smuzhiyun
116*4882a593Smuzhiyun MODULE_ALIAS("spi:ksz9477");
117*4882a593Smuzhiyun MODULE_ALIAS("spi:ksz9897");
118*4882a593Smuzhiyun MODULE_ALIAS("spi:ksz9893");
119*4882a593Smuzhiyun MODULE_ALIAS("spi:ksz9563");
120*4882a593Smuzhiyun MODULE_ALIAS("spi:ksz8563");
121*4882a593Smuzhiyun MODULE_ALIAS("spi:ksz9567");
122*4882a593Smuzhiyun MODULE_AUTHOR("Woojung Huh <Woojung.Huh@microchip.com>");
123*4882a593Smuzhiyun MODULE_DESCRIPTION("Microchip KSZ9477 Series Switch SPI access Driver");
124*4882a593Smuzhiyun MODULE_LICENSE("GPL");
125