1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Copyright 2020-2022 Bootlin
4 * Author: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
5 */
6
7#include <linux/phy/phy.h>
8#include <linux/regmap.h>
9
10#include "sun8i_a83t_dphy.h"
11#include "sun8i_a83t_mipi_csi2.h"
12
13static int sun8i_a83t_dphy_configure(struct phy *dphy,
14				     union phy_configure_opts *opts)
15{
16	return phy_mipi_dphy_config_validate(&opts->mipi_dphy);
17}
18
19static int sun8i_a83t_dphy_power_on(struct phy *dphy)
20{
21	struct sun8i_a83t_mipi_csi2_device *csi2_dev = phy_get_drvdata(dphy);
22	struct regmap *regmap = csi2_dev->regmap;
23
24	regmap_write(regmap, SUN8I_A83T_DPHY_CTRL_REG,
25		     SUN8I_A83T_DPHY_CTRL_RESET_N |
26		     SUN8I_A83T_DPHY_CTRL_SHUTDOWN_N);
27
28	regmap_write(regmap, SUN8I_A83T_DPHY_ANA0_REG,
29		     SUN8I_A83T_DPHY_ANA0_REXT_EN |
30		     SUN8I_A83T_DPHY_ANA0_RINT(2) |
31		     SUN8I_A83T_DPHY_ANA0_SNK(2));
32
33	return 0;
34};
35
36static int sun8i_a83t_dphy_power_off(struct phy *dphy)
37{
38	struct sun8i_a83t_mipi_csi2_device *csi2_dev = phy_get_drvdata(dphy);
39	struct regmap *regmap = csi2_dev->regmap;
40
41	regmap_write(regmap, SUN8I_A83T_DPHY_CTRL_REG, 0);
42
43	return 0;
44};
45
46static const struct phy_ops sun8i_a83t_dphy_ops = {
47	.configure	= sun8i_a83t_dphy_configure,
48	.power_on	= sun8i_a83t_dphy_power_on,
49	.power_off	= sun8i_a83t_dphy_power_off,
50};
51
52int sun8i_a83t_dphy_register(struct sun8i_a83t_mipi_csi2_device *csi2_dev)
53{
54	struct device *dev = csi2_dev->dev;
55	struct phy_provider *phy_provider;
56
57	csi2_dev->dphy = devm_phy_create(dev, NULL, &sun8i_a83t_dphy_ops);
58	if (IS_ERR(csi2_dev->dphy)) {
59		dev_err(dev, "failed to create D-PHY\n");
60		return PTR_ERR(csi2_dev->dphy);
61	}
62
63	phy_set_drvdata(csi2_dev->dphy, csi2_dev);
64
65	phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
66	if (IS_ERR(phy_provider)) {
67		dev_err(dev, "failed to register D-PHY provider\n");
68		return PTR_ERR(phy_provider);
69	}
70
71	return 0;
72}
73