183d290c5STom Rini // SPDX-License-Identifier: GPL-2.0+
2c2012cb4SSimon Glass /*
3c2012cb4SSimon Glass * Copyright (C) 2014 NVIDIA Corporation
4c2012cb4SSimon Glass */
5c2012cb4SSimon Glass
6c2012cb4SSimon Glass #include <common.h>
7c2012cb4SSimon Glass #include <dm.h>
8c2012cb4SSimon Glass #include <asm/gpio.h>
9c2012cb4SSimon Glass #include <power/as3722.h>
10c2012cb4SSimon Glass #include <power/pmic.h>
11c2012cb4SSimon Glass
12c2012cb4SSimon Glass #define NUM_GPIOS 8
13c2012cb4SSimon Glass
as3722_gpio_configure(struct udevice * pmic,unsigned int gpio,unsigned long flags)14c2012cb4SSimon Glass int as3722_gpio_configure(struct udevice *pmic, unsigned int gpio,
15c2012cb4SSimon Glass unsigned long flags)
16c2012cb4SSimon Glass {
17c2012cb4SSimon Glass u8 value = 0;
18c2012cb4SSimon Glass int err;
19c2012cb4SSimon Glass
20c2012cb4SSimon Glass if (flags & AS3722_GPIO_OUTPUT_VDDH)
21c2012cb4SSimon Glass value |= AS3722_GPIO_CONTROL_MODE_OUTPUT_VDDH;
22c2012cb4SSimon Glass
23c2012cb4SSimon Glass if (flags & AS3722_GPIO_INVERT)
24c2012cb4SSimon Glass value |= AS3722_GPIO_CONTROL_INVERT;
25c2012cb4SSimon Glass
26c2012cb4SSimon Glass err = pmic_reg_write(pmic, AS3722_GPIO_CONTROL(gpio), value);
27c2012cb4SSimon Glass if (err) {
28*c83c436dSSimon Glass pr_err("failed to configure GPIO#%u: %d\n", gpio, err);
29c2012cb4SSimon Glass return err;
30c2012cb4SSimon Glass }
31c2012cb4SSimon Glass
32c2012cb4SSimon Glass return 0;
33c2012cb4SSimon Glass }
34c2012cb4SSimon Glass
as3722_gpio_set_value(struct udevice * dev,unsigned int gpio,int level)35c2012cb4SSimon Glass static int as3722_gpio_set_value(struct udevice *dev, unsigned int gpio,
36c2012cb4SSimon Glass int level)
37c2012cb4SSimon Glass {
38c2012cb4SSimon Glass struct udevice *pmic = dev_get_parent(dev);
39c2012cb4SSimon Glass const char *l;
40c2012cb4SSimon Glass u8 value;
41c2012cb4SSimon Glass int err;
42c2012cb4SSimon Glass
43c2012cb4SSimon Glass if (gpio >= NUM_GPIOS)
44c2012cb4SSimon Glass return -EINVAL;
45c2012cb4SSimon Glass
46c2012cb4SSimon Glass err = pmic_reg_read(pmic, AS3722_GPIO_SIGNAL_OUT);
47c2012cb4SSimon Glass if (err < 0) {
48*c83c436dSSimon Glass pr_err("failed to read GPIO signal out register: %d\n", err);
49c2012cb4SSimon Glass return err;
50c2012cb4SSimon Glass }
51c2012cb4SSimon Glass value = err;
52c2012cb4SSimon Glass
53c2012cb4SSimon Glass if (level == 0) {
54c2012cb4SSimon Glass value &= ~(1 << gpio);
55c2012cb4SSimon Glass l = "low";
56c2012cb4SSimon Glass } else {
57c2012cb4SSimon Glass value |= 1 << gpio;
58c2012cb4SSimon Glass l = "high";
59c2012cb4SSimon Glass }
60c2012cb4SSimon Glass
61c2012cb4SSimon Glass err = pmic_reg_write(pmic, AS3722_GPIO_SIGNAL_OUT, value);
62c2012cb4SSimon Glass if (err) {
63*c83c436dSSimon Glass pr_err("failed to set GPIO#%u %s: %d\n", gpio, l, err);
64c2012cb4SSimon Glass return err;
65c2012cb4SSimon Glass }
66c2012cb4SSimon Glass
67c2012cb4SSimon Glass return 0;
68c2012cb4SSimon Glass }
69c2012cb4SSimon Glass
as3722_gpio_direction_output(struct udevice * dev,unsigned int gpio,int value)70c2012cb4SSimon Glass int as3722_gpio_direction_output(struct udevice *dev, unsigned int gpio,
71c2012cb4SSimon Glass int value)
72c2012cb4SSimon Glass {
73c2012cb4SSimon Glass struct udevice *pmic = dev_get_parent(dev);
74c2012cb4SSimon Glass int err;
75c2012cb4SSimon Glass
76c2012cb4SSimon Glass if (gpio > 7)
77c2012cb4SSimon Glass return -EINVAL;
78c2012cb4SSimon Glass
79c2012cb4SSimon Glass if (value == 0)
80c2012cb4SSimon Glass value = AS3722_GPIO_CONTROL_MODE_OUTPUT_VDDL;
81c2012cb4SSimon Glass else
82c2012cb4SSimon Glass value = AS3722_GPIO_CONTROL_MODE_OUTPUT_VDDH;
83c2012cb4SSimon Glass
84c2012cb4SSimon Glass err = pmic_reg_write(pmic, AS3722_GPIO_CONTROL(gpio), value);
85c2012cb4SSimon Glass if (err) {
86*c83c436dSSimon Glass pr_err("failed to configure GPIO#%u as output: %d\n", gpio,
87*c83c436dSSimon Glass err);
88c2012cb4SSimon Glass return err;
89c2012cb4SSimon Glass }
90c2012cb4SSimon Glass
91c2012cb4SSimon Glass err = as3722_gpio_set_value(pmic, gpio, value);
92c2012cb4SSimon Glass if (err < 0) {
93*c83c436dSSimon Glass pr_err("failed to set GPIO#%u high: %d\n", gpio, err);
94c2012cb4SSimon Glass return err;
95c2012cb4SSimon Glass }
96c2012cb4SSimon Glass
97c2012cb4SSimon Glass return 0;
98c2012cb4SSimon Glass }
99c2012cb4SSimon Glass
as3722_gpio_probe(struct udevice * dev)100c2012cb4SSimon Glass static int as3722_gpio_probe(struct udevice *dev)
101c2012cb4SSimon Glass {
102c2012cb4SSimon Glass struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
103c2012cb4SSimon Glass
104c2012cb4SSimon Glass uc_priv->gpio_count = NUM_GPIOS;
105c2012cb4SSimon Glass uc_priv->bank_name = "as3722_";
106c2012cb4SSimon Glass
107c2012cb4SSimon Glass return 0;
108c2012cb4SSimon Glass }
109c2012cb4SSimon Glass
110c2012cb4SSimon Glass static const struct dm_gpio_ops gpio_as3722_ops = {
111c2012cb4SSimon Glass .direction_output = as3722_gpio_direction_output,
112c2012cb4SSimon Glass .set_value = as3722_gpio_set_value,
113c2012cb4SSimon Glass };
114c2012cb4SSimon Glass
115c2012cb4SSimon Glass U_BOOT_DRIVER(gpio_as3722) = {
116c2012cb4SSimon Glass .name = "gpio_as3722",
117c2012cb4SSimon Glass .id = UCLASS_GPIO,
118c2012cb4SSimon Glass .ops = &gpio_as3722_ops,
119c2012cb4SSimon Glass .probe = as3722_gpio_probe,
120c2012cb4SSimon Glass };
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