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
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
|
/*
* (C) Copyright 2015 Hans de Goede <hdegoede@redhat.com>
*
* X-Powers AXP Power Management ICs gpio driver
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/arch/gpio.h>
#include <asm/arch/pmic_bus.h>
#include <asm/gpio.h>
#include <dm.h>
#include <dm/device-internal.h>
#include <dm/lists.h>
#include <dm/root.h>
#include <errno.h>
#ifdef CONFIG_AXP152_POWER
#include <axp152.h>
#elif defined CONFIG_AXP209_POWER
#include <axp209.h>
#elif defined CONFIG_AXP221_POWER
#include <axp221.h>
#else
#error Unknown AXP model
#endif
static int axp_gpio_set_value(struct udevice *dev, unsigned pin, int val);
static u8 axp_get_gpio_ctrl_reg(unsigned pin)
{
switch (pin) {
case 0: return AXP_GPIO0_CTRL;
case 1: return AXP_GPIO1_CTRL;
#ifdef AXP_GPIO2_CTRL
case 2: return AXP_GPIO2_CTRL;
#endif
#ifdef AXP_GPIO3_CTRL
case 3: return AXP_GPIO3_CTRL;
#endif
}
return 0;
}
static int axp_gpio_direction_input(struct udevice *dev, unsigned pin)
{
u8 reg;
switch (pin) {
#ifndef CONFIG_AXP152_POWER /* NA on axp152 */
case SUNXI_GPIO_AXP0_VBUS_DETECT:
return 0;
#endif
default:
reg = axp_get_gpio_ctrl_reg(pin);
if (reg == 0)
return -EINVAL;
return pmic_bus_write(reg, AXP_GPIO_CTRL_INPUT);
}
}
static int axp_gpio_direction_output(struct udevice *dev, unsigned pin,
int val)
{
__maybe_unused int ret;
u8 reg;
switch (pin) {
#ifdef CONFIG_AXP221_POWER /* Only available on axp221/axp223 */
case SUNXI_GPIO_AXP0_VBUS_ENABLE:
ret = pmic_bus_clrbits(AXP221_MISC_CTRL,
AXP221_MISC_CTRL_N_VBUSEN_FUNC);
if (ret)
return ret;
return axp_gpio_set_value(dev, pin, val);
#endif
default:
reg = axp_get_gpio_ctrl_reg(pin);
if (reg == 0)
return -EINVAL;
return pmic_bus_write(reg, val ? AXP_GPIO_CTRL_OUTPUT_HIGH :
AXP_GPIO_CTRL_OUTPUT_LOW);
}
}
static int axp_gpio_get_value(struct udevice *dev, unsigned pin)
{
u8 reg, val, mask;
int ret;
switch (pin) {
#ifndef CONFIG_AXP152_POWER /* NA on axp152 */
case SUNXI_GPIO_AXP0_VBUS_DETECT:
ret = pmic_bus_read(AXP_POWER_STATUS, &val);
mask = AXP_POWER_STATUS_VBUS_PRESENT;
break;
#endif
#ifdef CONFIG_AXP221_POWER /* Only available on axp221/axp223 */
case SUNXI_GPIO_AXP0_VBUS_ENABLE:
ret = pmic_bus_read(AXP221_VBUS_IPSOUT, &val);
mask = AXP221_VBUS_IPSOUT_DRIVEBUS;
break;
#endif
default:
reg = axp_get_gpio_ctrl_reg(pin);
if (reg == 0)
return -EINVAL;
ret = pmic_bus_read(AXP_GPIO_STATE, &val);
mask = 1 << (pin + AXP_GPIO_STATE_OFFSET);
}
if (ret)
return ret;
return (val & mask) ? 1 : 0;
}
static int axp_gpio_set_value(struct udevice *dev, unsigned pin, int val)
{
u8 reg;
switch (pin) {
#ifdef CONFIG_AXP221_POWER /* Only available on axp221/axp223 */
case SUNXI_GPIO_AXP0_VBUS_ENABLE:
if (val)
return pmic_bus_setbits(AXP221_VBUS_IPSOUT,
AXP221_VBUS_IPSOUT_DRIVEBUS);
else
return pmic_bus_clrbits(AXP221_VBUS_IPSOUT,
AXP221_VBUS_IPSOUT_DRIVEBUS);
#endif
default:
reg = axp_get_gpio_ctrl_reg(pin);
if (reg == 0)
return -EINVAL;
return pmic_bus_write(reg, val ? AXP_GPIO_CTRL_OUTPUT_HIGH :
AXP_GPIO_CTRL_OUTPUT_LOW);
}
}
static const struct dm_gpio_ops gpio_axp_ops = {
.direction_input = axp_gpio_direction_input,
.direction_output = axp_gpio_direction_output,
.get_value = axp_gpio_get_value,
.set_value = axp_gpio_set_value,
};
static int gpio_axp_probe(struct udevice *dev)
{
struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
/* Tell the uclass how many GPIOs we have */
uc_priv->bank_name = strdup(SUNXI_GPIO_AXP0_PREFIX);
uc_priv->gpio_count = SUNXI_GPIO_AXP0_GPIO_COUNT;
return 0;
}
U_BOOT_DRIVER(gpio_axp) = {
.name = "gpio_axp",
.id = UCLASS_GPIO,
.ops = &gpio_axp_ops,
.probe = gpio_axp_probe,
};
int axp_gpio_init(void)
{
struct udevice *dev;
int ret;
ret = pmic_bus_init();
if (ret)
return ret;
/* There is no devicetree support for the axp yet, so bind directly */
ret = device_bind_driver(dm_root(), "gpio_axp", "AXP-gpio", &dev);
if (ret)
return ret;
return 0;
}
|
