1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * serdes-pinctrl.c -- serdes pin control driver.
4 *
5 * Copyright (c) 2023-2028 Rockchip Electronics Co. Ltd.
6 *
7 * Author: luowei <lw@rock-chips.com>
8 */
9
10 #include "core.h"
11
12 static const struct pinconf_param serdes_conf_params[] = {
13 { "bias-disable", PIN_CONFIG_BIAS_DISABLE, 0 },
14 { "bias-high-impedance", PIN_CONFIG_BIAS_HIGH_IMPEDANCE, 0 },
15 { "bias-bus-hold", PIN_CONFIG_BIAS_BUS_HOLD, 0 },
16 { "bias-pull-up", PIN_CONFIG_BIAS_PULL_UP, 1 },
17 { "bias-pull-down", PIN_CONFIG_BIAS_PULL_DOWN, 1 },
18 { "bias-pull-pin-default", PIN_CONFIG_BIAS_PULL_PIN_DEFAULT, 1 },
19 { "drive-open-drain", PIN_CONFIG_DRIVE_OPEN_DRAIN, 0 },
20 { "drive-open-source", PIN_CONFIG_DRIVE_OPEN_SOURCE, 0 },
21 { "drive-strength", PIN_CONFIG_DRIVE_STRENGTH, 0 },
22 { "input-enable", PIN_CONFIG_INPUT_ENABLE, 1 },
23 { "input-disable", PIN_CONFIG_INPUT_ENABLE, 0 },
24 };
25
serdes_pinctrl_get_pins_count(struct udevice * dev)26 static int serdes_pinctrl_get_pins_count(struct udevice *dev)
27 {
28 struct serdes *serdes = dev_get_priv(dev->parent);
29
30 if (serdes->chip_data->pinctrl_info->num_pins)
31 return serdes->chip_data->pinctrl_info->num_pins;
32 else
33 return 0;
34 }
35
serdes_pinctrl_get_pin_name(struct udevice * dev,unsigned int selector)36 static const char *serdes_pinctrl_get_pin_name(struct udevice *dev,
37 unsigned int selector)
38 {
39 struct serdes *serdes = dev_get_priv(dev->parent);
40
41 if (serdes->chip_data->pinctrl_info->pins[selector].name)
42 return serdes->chip_data->pinctrl_info->pins[selector].name;
43 else
44 return "unknow-pin";
45 }
46
serdes_pinctrl_get_groups_count(struct udevice * dev)47 static int serdes_pinctrl_get_groups_count(struct udevice *dev)
48 {
49 struct serdes *serdes = dev_get_priv(dev->parent);
50
51 if (serdes->chip_data->pinctrl_info->num_groups)
52 return serdes->chip_data->pinctrl_info->num_groups;
53 else
54 return 0;
55 }
56
serdes_pinctrl_get_group_name(struct udevice * dev,unsigned int selector)57 static const char *serdes_pinctrl_get_group_name(struct udevice *dev,
58 unsigned int selector)
59 {
60 struct serdes *serdes = dev_get_priv(dev->parent);
61
62 if (serdes->chip_data->pinctrl_info->groups[selector].name)
63 return serdes->chip_data->pinctrl_info->groups[selector].name;
64 else
65 return "unknow-group";
66 }
67
serdes_pinctrl_get_functions_count(struct udevice * dev)68 static int serdes_pinctrl_get_functions_count(struct udevice *dev)
69 {
70 struct serdes *serdes = dev_get_priv(dev->parent);
71
72 if (serdes->chip_data->pinctrl_info->num_functions)
73 return serdes->chip_data->pinctrl_info->num_functions;
74 else
75 return 0;
76 }
77
serdes_pinctrl_get_function_name(struct udevice * dev,unsigned int selector)78 static const char *serdes_pinctrl_get_function_name(struct udevice *dev,
79 unsigned int selector)
80 {
81 struct serdes *serdes = dev_get_priv(dev->parent);
82
83 if (serdes->chip_data->pinctrl_info->functions[selector].name)
84 return serdes->chip_data->pinctrl_info->functions[selector].name;
85 else
86 return "unknow-function";
87 }
88
serdes_pinmux_set_mux(struct udevice * dev,unsigned int pin_selector,unsigned int func_selector)89 static int serdes_pinmux_set_mux(struct udevice *dev,
90 unsigned int pin_selector,
91 unsigned int func_selector)
92 {
93 struct serdes *serdes = dev_get_priv(dev->parent);
94 int ret = 0;
95
96 if (serdes->chip_data->pinctrl_ops->pinmux_set)
97 ret = serdes->chip_data->pinctrl_ops->pinmux_set(serdes,
98 pin_selector, func_selector);
99
100 SERDES_DBG_MFD("%s: %s pin=%d,func=%d\n", __func__,
101 serdes->chip_data->name, pin_selector, func_selector);
102 return ret;
103 }
104
serdes_pinmux_group_set_mux(struct udevice * dev,unsigned int group_selector,unsigned int func_selector)105 static int serdes_pinmux_group_set_mux(struct udevice *dev,
106 unsigned int group_selector,
107 unsigned int func_selector)
108 {
109 struct serdes *serdes = dev_get_priv(dev->parent);
110 int ret = 0;
111
112 if (serdes->chip_data->pinctrl_ops->pinmux_group_set)
113 ret = serdes->chip_data->pinctrl_ops->pinmux_group_set(serdes,
114 group_selector, func_selector);
115
116 SERDES_DBG_MFD("%s: %s function=%d,group=%d\n", __func__,
117 serdes->chip_data->name, func_selector, group_selector);
118 return ret;
119 }
120
serdes_pinconf_set(struct udevice * dev,unsigned int pin_selector,unsigned int param,unsigned int argument)121 static int serdes_pinconf_set(struct udevice *dev, unsigned int pin_selector,
122 unsigned int param, unsigned int argument)
123 {
124 int ret = 0;
125 struct serdes *serdes = dev_get_priv(dev->parent);
126
127 if (serdes->chip_data->pinctrl_ops->pinconf_set)
128 ret = serdes->chip_data->pinctrl_ops->pinconf_set(serdes,
129 pin_selector, param, argument);
130
131 SERDES_DBG_MFD("serdes: pin = %d (%s), param = %d, arg = %d\n",
132 pin_selector,
133 serdes_pinctrl_get_pin_name(dev, pin_selector),
134 param, argument);
135
136 return ret;
137 }
138
serdes_pinconf_group_set(struct udevice * dev,unsigned int group_selector,unsigned int param,unsigned int argument)139 static int serdes_pinconf_group_set(struct udevice *dev,
140 unsigned int group_selector,
141 unsigned int param, unsigned int argument)
142 {
143 int ret = 0;
144 struct serdes *serdes = dev_get_priv(dev->parent);
145
146 if (serdes->chip_data->pinctrl_ops->pinconf_group_set)
147 ret = serdes->chip_data->pinctrl_ops->pinconf_group_set(serdes,
148 group_selector, param, argument);
149
150 SERDES_DBG_MFD("serdes: group = %d (%s), param = %d, arg = %d\n",
151 group_selector,
152 serdes_pinctrl_get_group_name(dev, group_selector),
153 param, argument);
154 return ret;
155 }
156
157 static struct pinctrl_ops serdes_pinctrl_ops = {
158 .get_pins_count = serdes_pinctrl_get_pins_count,
159 .get_pin_name = serdes_pinctrl_get_pin_name,
160 .get_groups_count = serdes_pinctrl_get_groups_count,
161 .get_group_name = serdes_pinctrl_get_group_name,
162 .get_functions_count = serdes_pinctrl_get_functions_count,
163 .get_function_name = serdes_pinctrl_get_function_name,
164 .set_state = pinctrl_generic_set_state,
165 .pinmux_set = serdes_pinmux_set_mux,
166 .pinmux_group_set = serdes_pinmux_group_set_mux,
167 .pinconf_num_params = ARRAY_SIZE(serdes_conf_params),
168 .pinconf_params = serdes_conf_params,
169 .pinconf_set = serdes_pinconf_set,
170 .pinconf_group_set = serdes_pinconf_group_set,
171 };
172
serdes_pinctrl_probe(struct udevice * dev)173 int serdes_pinctrl_probe(struct udevice *dev)
174 {
175 struct serdes *serdes = dev_get_priv(dev->parent);
176 struct serdes_pinctrl *serdes_pinctrl;
177 int ret = 0;
178
179 SERDES_DBG_MFD("%s: %s %s start\n", __func__, dev->name,
180 serdes->chip_data->name);
181
182 serdes_pinctrl = calloc(1, sizeof(*serdes_pinctrl));
183 if (!serdes_pinctrl)
184 return -ENOMEM;
185
186 serdes->serdes_pinctrl = serdes_pinctrl;
187
188 serdes_pinctrl->parent = serdes;
189
190 ret = serdes_gpio_register(dev);
191 if (ret)
192 return ret;
193
194 return 0;
195 }
196
197 static const struct udevice_id serdes_of_match[] = {
198 #if IS_ENABLED(CONFIG_SERDES_DISPLAY_CHIP_ROHM_BU18TL82)
199 { .compatible = "rohm,bu18tl82-pinctrl" },
200 #endif
201 #if IS_ENABLED(CONFIG_SERDES_DISPLAY_CHIP_ROHM_BU18RL82)
202 { .compatible = "rohm,bu18rl82-pinctrl" },
203 #endif
204 #if IS_ENABLED(CONFIG_SERDES_DISPLAY_CHIP_MAXIM_MAX96745)
205 { .compatible = "maxim,max96745-pinctrl", },
206 #endif
207 #if IS_ENABLED(CONFIG_SERDES_DISPLAY_CHIP_MAXIM_MAX96755)
208 { .compatible = "maxim,max96755-pinctrl" },
209 #endif
210 #if IS_ENABLED(CONFIG_SERDES_DISPLAY_CHIP_ROCKCHIP_RKX111)
211 { .compatible = "rockchip,rkx111-pinctrl" },
212 #endif
213 { }
214 };
215
216 U_BOOT_DRIVER(serdes_pinctrl) = {
217 .name = "serdes-pinctrl",
218 .id = UCLASS_PINCTRL,
219 .of_match = serdes_of_match,
220 .probe = serdes_pinctrl_probe,
221 .ops = &serdes_pinctrl_ops,
222 .priv_auto_alloc_size = sizeof(struct serdes_pinctrl),
223 };
224