1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (C) 2019 Disruptive Technologies Research AS
4 * Sven Schwermer <sven.svenschwermer@disruptive-technologies.com>
5 */
6
7 #include "regulator_common.h"
8 #include <common.h>
9 #include <power/regulator.h>
10
regulator_common_ofdata_to_platdata(struct udevice * dev,struct regulator_common_platdata * dev_pdata,const char * enable_gpio_name)11 int regulator_common_ofdata_to_platdata(struct udevice *dev,
12 struct regulator_common_platdata *dev_pdata, const char *enable_gpio_name)
13 {
14 struct gpio_desc *gpio;
15 struct dm_regulator_uclass_platdata *uc_pdata;
16 int flags = GPIOD_IS_OUT;
17 int ret;
18
19 uc_pdata = dev_get_uclass_platdata(dev);
20
21 if (!dev_read_bool(dev, "enable-active-high"))
22 flags |= GPIOD_ACTIVE_LOW;
23 if (uc_pdata->boot_on)
24 flags |= GPIOD_IS_OUT_ACTIVE;
25
26 /* Get optional enable GPIO desc */
27 gpio = &dev_pdata->gpio;
28 ret = gpio_request_by_name(dev, enable_gpio_name, 0, gpio, flags);
29 if (ret) {
30 debug("Regulator '%s' optional enable GPIO - not found! Error: %d\n",
31 dev->name, ret);
32 if (ret != -ENOENT)
33 return ret;
34 }
35
36 /* Get optional ramp up delay */
37 dev_pdata->startup_delay_us = dev_read_u32_default(dev,
38 "startup-delay-us", 0);
39 dev_pdata->off_on_delay_us =
40 dev_read_u32_default(dev, "u-boot,off-on-delay-us", 0);
41
42 return 0;
43 }
44
regulator_common_get_enable(const struct udevice * dev,struct regulator_common_platdata * dev_pdata)45 int regulator_common_get_enable(const struct udevice *dev,
46 struct regulator_common_platdata *dev_pdata)
47 {
48 /* Enable GPIO is optional */
49 if (!dev_pdata->gpio.dev)
50 return true;
51
52 return dm_gpio_get_value(&dev_pdata->gpio);
53 }
54
regulator_common_set_enable(const struct udevice * dev,struct regulator_common_platdata * dev_pdata,bool enable)55 int regulator_common_set_enable(const struct udevice *dev,
56 struct regulator_common_platdata *dev_pdata, bool enable)
57 {
58 int ret;
59
60 debug("%s: dev='%s', enable=%d, delay=%d, has_gpio=%d\n", __func__,
61 dev->name, enable, dev_pdata->startup_delay_us,
62 dm_gpio_is_valid(&dev_pdata->gpio));
63 /* Enable GPIO is optional */
64 if (!dm_gpio_is_valid(&dev_pdata->gpio)) {
65 if (!enable)
66 return -ENOSYS;
67 return 0;
68 }
69
70 ret = dm_gpio_set_value(&dev_pdata->gpio, enable);
71 if (ret) {
72 pr_err("Can't set regulator : %s gpio to: %d\n", dev->name,
73 enable);
74 return ret;
75 }
76
77 if (enable && dev_pdata->startup_delay_us)
78 udelay(dev_pdata->startup_delay_us);
79 debug("%s: done\n", __func__);
80
81 if (!enable && dev_pdata->off_on_delay_us)
82 udelay(dev_pdata->off_on_delay_us);
83
84 return 0;
85 }
86