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
sun8i_a83t_dphy_configure(struct phy * dphy,union phy_configure_opts * opts)13 static 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
sun8i_a83t_dphy_power_on(struct phy * dphy)19 static 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
sun8i_a83t_dphy_power_off(struct phy * dphy)36 static 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
46 static 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
sun8i_a83t_dphy_register(struct sun8i_a83t_mipi_csi2_device * csi2_dev)52 int 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