1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * Copyright (C) 2015 Linaro
3*4882a593Smuzhiyun * Peter Griffin <peter.griffin@linaro.org>
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0+
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #include <common.h>
9*4882a593Smuzhiyun #include <dm.h>
10*4882a593Smuzhiyun #include <asm/gpio.h>
11*4882a593Smuzhiyun #include <asm/io.h>
12*4882a593Smuzhiyun #include <errno.h>
13*4882a593Smuzhiyun
hi6220_gpio_direction_input(struct udevice * dev,unsigned int gpio)14*4882a593Smuzhiyun static int hi6220_gpio_direction_input(struct udevice *dev, unsigned int gpio)
15*4882a593Smuzhiyun {
16*4882a593Smuzhiyun struct gpio_bank *bank = dev_get_priv(dev);
17*4882a593Smuzhiyun u8 data;
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun data = readb(bank->base + HI6220_GPIO_DIR);
20*4882a593Smuzhiyun data &= ~(1 << gpio);
21*4882a593Smuzhiyun writeb(data, bank->base + HI6220_GPIO_DIR);
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun return 0;
24*4882a593Smuzhiyun }
25*4882a593Smuzhiyun
hi6220_gpio_set_value(struct udevice * dev,unsigned gpio,int value)26*4882a593Smuzhiyun static int hi6220_gpio_set_value(struct udevice *dev, unsigned gpio,
27*4882a593Smuzhiyun int value)
28*4882a593Smuzhiyun {
29*4882a593Smuzhiyun struct gpio_bank *bank = dev_get_priv(dev);
30*4882a593Smuzhiyun
31*4882a593Smuzhiyun writeb(!!value << gpio, bank->base + (BIT(gpio + 2)));
32*4882a593Smuzhiyun return 0;
33*4882a593Smuzhiyun }
34*4882a593Smuzhiyun
hi6220_gpio_direction_output(struct udevice * dev,unsigned gpio,int value)35*4882a593Smuzhiyun static int hi6220_gpio_direction_output(struct udevice *dev, unsigned gpio,
36*4882a593Smuzhiyun int value)
37*4882a593Smuzhiyun {
38*4882a593Smuzhiyun struct gpio_bank *bank = dev_get_priv(dev);
39*4882a593Smuzhiyun u8 data;
40*4882a593Smuzhiyun
41*4882a593Smuzhiyun data = readb(bank->base + HI6220_GPIO_DIR);
42*4882a593Smuzhiyun data |= 1 << gpio;
43*4882a593Smuzhiyun writeb(data, bank->base + HI6220_GPIO_DIR);
44*4882a593Smuzhiyun
45*4882a593Smuzhiyun hi6220_gpio_set_value(dev, gpio, value);
46*4882a593Smuzhiyun
47*4882a593Smuzhiyun return 0;
48*4882a593Smuzhiyun }
49*4882a593Smuzhiyun
hi6220_gpio_get_value(struct udevice * dev,unsigned gpio)50*4882a593Smuzhiyun static int hi6220_gpio_get_value(struct udevice *dev, unsigned gpio)
51*4882a593Smuzhiyun {
52*4882a593Smuzhiyun struct gpio_bank *bank = dev_get_priv(dev);
53*4882a593Smuzhiyun
54*4882a593Smuzhiyun return !!readb(bank->base + (BIT(gpio + 2)));
55*4882a593Smuzhiyun }
56*4882a593Smuzhiyun
57*4882a593Smuzhiyun
58*4882a593Smuzhiyun
59*4882a593Smuzhiyun static const struct dm_gpio_ops gpio_hi6220_ops = {
60*4882a593Smuzhiyun .direction_input = hi6220_gpio_direction_input,
61*4882a593Smuzhiyun .direction_output = hi6220_gpio_direction_output,
62*4882a593Smuzhiyun .get_value = hi6220_gpio_get_value,
63*4882a593Smuzhiyun .set_value = hi6220_gpio_set_value,
64*4882a593Smuzhiyun };
65*4882a593Smuzhiyun
hi6220_gpio_probe(struct udevice * dev)66*4882a593Smuzhiyun static int hi6220_gpio_probe(struct udevice *dev)
67*4882a593Smuzhiyun {
68*4882a593Smuzhiyun struct gpio_bank *bank = dev_get_priv(dev);
69*4882a593Smuzhiyun struct hikey_gpio_platdata *plat = dev_get_platdata(dev);
70*4882a593Smuzhiyun struct gpio_dev_priv *uc_priv = dev->uclass_priv;
71*4882a593Smuzhiyun char name[18], *str;
72*4882a593Smuzhiyun
73*4882a593Smuzhiyun sprintf(name, "GPIO%d_", plat->bank_index);
74*4882a593Smuzhiyun
75*4882a593Smuzhiyun str = strdup(name);
76*4882a593Smuzhiyun if (!str)
77*4882a593Smuzhiyun return -ENOMEM;
78*4882a593Smuzhiyun
79*4882a593Smuzhiyun uc_priv->bank_name = str;
80*4882a593Smuzhiyun uc_priv->gpio_count = HI6220_GPIO_PER_BANK;
81*4882a593Smuzhiyun
82*4882a593Smuzhiyun bank->base = (u8 *)plat->base;
83*4882a593Smuzhiyun
84*4882a593Smuzhiyun return 0;
85*4882a593Smuzhiyun }
86*4882a593Smuzhiyun
87*4882a593Smuzhiyun U_BOOT_DRIVER(gpio_hi6220) = {
88*4882a593Smuzhiyun .name = "gpio_hi6220",
89*4882a593Smuzhiyun .id = UCLASS_GPIO,
90*4882a593Smuzhiyun .ops = &gpio_hi6220_ops,
91*4882a593Smuzhiyun .probe = hi6220_gpio_probe,
92*4882a593Smuzhiyun .priv_auto_alloc_size = sizeof(struct gpio_bank),
93*4882a593Smuzhiyun };
94*4882a593Smuzhiyun
95*4882a593Smuzhiyun
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