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
|
// SPDX-License-Identifier: GPL-2.0
/*
* Renesas RZ/V2H(P) VBENCTL VBUS_SEL mux driver
*
* Copyright (C) 2026 Renesas Electronics Corp.
*/
#include <linux/auxiliary_bus.h>
#include <linux/err.h>
#include <linux/module.h>
#include <linux/mux/driver.h>
#include <linux/regmap.h>
#define RZV2H_VBENCTL 0xf0c
struct mux_rzv2h_vbenctl_priv {
struct regmap_field *field;
};
static int mux_rzv2h_vbenctl_set(struct mux_control *mux, int state)
{
struct mux_rzv2h_vbenctl_priv *priv = mux_chip_priv(mux->chip);
return regmap_field_write(priv->field, state);
}
static const struct mux_control_ops mux_rzv2h_vbenctl_ops = {
.set = mux_rzv2h_vbenctl_set,
};
static int mux_rzv2h_vbenctl_probe(struct auxiliary_device *adev,
const struct auxiliary_device_id *id)
{
const struct reg_field reg_field = REG_FIELD(RZV2H_VBENCTL, 0, 0);
struct mux_rzv2h_vbenctl_priv *priv;
struct device *dev = &adev->dev;
struct mux_chip *mux_chip;
struct regmap *regmap;
int ret;
regmap = dev_get_regmap(dev->parent, NULL);
if (!regmap)
return -ENODEV;
mux_chip = devm_mux_chip_alloc(dev, 1, sizeof(*priv));
if (IS_ERR(mux_chip))
return PTR_ERR(mux_chip);
priv = mux_chip_priv(mux_chip);
priv->field = devm_regmap_field_alloc(dev, regmap, reg_field);
if (IS_ERR(priv->field))
return PTR_ERR(priv->field);
mux_chip->ops = &mux_rzv2h_vbenctl_ops;
mux_chip->mux[0].states = 2;
mux_chip->mux[0].idle_state = MUX_IDLE_AS_IS;
ret = devm_mux_chip_register(dev, mux_chip);
if (ret < 0)
return dev_err_probe(dev, ret, "Failed to register mux chip\n");
return 0;
}
static const struct auxiliary_device_id mux_rzv2h_vbenctl_ids[] = {
{ .name = "rzv2h_usb2phy_reset.vbenctl" },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(auxiliary, mux_rzv2h_vbenctl_ids);
static struct auxiliary_driver mux_rzv2h_vbenctl_driver = {
.name = "vbenctl",
.probe = mux_rzv2h_vbenctl_probe,
.id_table = mux_rzv2h_vbenctl_ids,
};
module_auxiliary_driver(mux_rzv2h_vbenctl_driver);
MODULE_DESCRIPTION("RZ/V2H VBENCTL VBUS_SEL mux driver");
MODULE_AUTHOR("Tommaso Merciai <tommaso.merciai.xr@bp.renesas.com>");
MODULE_LICENSE("GPL");
|
