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
|
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2019 Disruptive Technologies Research AS
* Sven Schwermer <sven.svenschwermer@disruptive-technologies.com>
*/
#include "regulator_common.h"
#include <common.h>
#include <power/regulator.h>
int regulator_common_ofdata_to_platdata(struct udevice *dev,
struct regulator_common_platdata *dev_pdata, const char *enable_gpio_name)
{
struct gpio_desc *gpio;
struct dm_regulator_uclass_platdata *uc_pdata;
int flags = GPIOD_IS_OUT;
int ret;
uc_pdata = dev_get_uclass_platdata(dev);
if (!dev_read_bool(dev, "enable-active-high"))
flags |= GPIOD_ACTIVE_LOW;
if (uc_pdata->boot_on)
flags |= GPIOD_IS_OUT_ACTIVE;
/* Get optional enable GPIO desc */
gpio = &dev_pdata->gpio;
ret = gpio_request_by_name(dev, enable_gpio_name, 0, gpio, flags);
if (ret) {
debug("Regulator '%s' optional enable GPIO - not found! Error: %d\n",
dev->name, ret);
if (ret != -ENOENT)
return ret;
}
/* Get optional ramp up delay */
dev_pdata->startup_delay_us = dev_read_u32_default(dev,
"startup-delay-us", 0);
dev_pdata->off_on_delay_us =
dev_read_u32_default(dev, "off-on-delay-us", 0);
if (!dev_pdata->off_on_delay_us) {
dev_pdata->off_on_delay_us =
dev_read_u32_default(dev, "u-boot,off-on-delay-us", 0);
}
return 0;
}
int regulator_common_get_enable(const struct udevice *dev,
struct regulator_common_platdata *dev_pdata)
{
/* Enable GPIO is optional */
if (!dev_pdata->gpio.dev)
return true;
return dm_gpio_get_value(&dev_pdata->gpio);
}
int regulator_common_set_enable(const struct udevice *dev,
struct regulator_common_platdata *dev_pdata, bool enable)
{
int ret;
debug("%s: dev='%s', enable=%d, delay=%d, has_gpio=%d\n", __func__,
dev->name, enable, dev_pdata->startup_delay_us,
dm_gpio_is_valid(&dev_pdata->gpio));
/* Enable GPIO is optional */
if (!dm_gpio_is_valid(&dev_pdata->gpio)) {
if (!enable)
return -ENOSYS;
return 0;
}
ret = dm_gpio_set_value(&dev_pdata->gpio, enable);
if (ret) {
pr_err("Can't set regulator : %s gpio to: %d\n", dev->name,
enable);
return ret;
}
if (enable && dev_pdata->startup_delay_us)
udelay(dev_pdata->startup_delay_us);
debug("%s: done\n", __func__);
if (!enable && dev_pdata->off_on_delay_us)
udelay(dev_pdata->off_on_delay_us);
return 0;
}
|
