2 * (C) Copyright 2015 Google, Inc
4 * (C) Copyright 2008-2014 Rockchip Electronics
5 * Peter, Software Engineering, <superpeter.cai@gmail.com>.
7 * SPDX-License-Identifier: GPL-2.0+
12 #include <asm/errno.h>
15 #include <dt-bindings/gpio/gpio.h>
18 ROCKCHIP_GPIOS_PER_BANK = 32,
21 #define OFFSET_TO_BIT(bit) (1UL << (bit))
23 struct rockchip_gpio_priv {
24 struct rockchip_gpio_regs *regs;
28 static int rockchip_gpio_direction_input(struct udevice *dev, unsigned offset)
30 struct rockchip_gpio_priv *priv = dev_get_priv(dev);
31 struct rockchip_gpio_regs *regs = priv->regs;
33 clrbits_le32(®s->swport_ddr, OFFSET_TO_BIT(offset));
38 static int rockchip_gpio_direction_output(struct udevice *dev, unsigned offset,
41 struct rockchip_gpio_priv *priv = dev_get_priv(dev);
42 struct rockchip_gpio_regs *regs = priv->regs;
43 int mask = OFFSET_TO_BIT(offset);
45 clrsetbits_le32(®s->swport_dr, mask, value ? mask : 0);
46 setbits_le32(®s->swport_ddr, mask);
51 static int rockchip_gpio_get_value(struct udevice *dev, unsigned offset)
53 struct rockchip_gpio_priv *priv = dev_get_priv(dev);
54 struct rockchip_gpio_regs *regs = priv->regs;
56 return readl(®s->ext_port) & OFFSET_TO_BIT(offset);
59 static int rockchip_gpio_set_value(struct udevice *dev, unsigned offset,
62 struct rockchip_gpio_priv *priv = dev_get_priv(dev);
63 struct rockchip_gpio_regs *regs = priv->regs;
64 int mask = OFFSET_TO_BIT(offset);
66 clrsetbits_le32(®s->swport_dr, mask, value ? mask : 0);
71 static int rockchip_gpio_get_function(struct udevice *dev, unsigned offset)
76 static int rockchip_gpio_xlate(struct udevice *dev, struct gpio_desc *desc,
77 struct fdtdec_phandle_args *args)
79 desc->offset = args->args[0];
80 desc->flags = args->args[1] & GPIO_ACTIVE_LOW ? GPIOD_ACTIVE_LOW : 0;
85 static int rockchip_gpio_probe(struct udevice *dev)
87 struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
88 struct rockchip_gpio_priv *priv = dev_get_priv(dev);
92 priv->regs = (struct rockchip_gpio_regs *)dev_get_addr(dev);
93 uc_priv->gpio_count = ROCKCHIP_GPIOS_PER_BANK;
94 end = strrchr(dev->name, '@');
95 bank = trailing_strtoln(dev->name, end);
96 priv->name[0] = 'A' + bank;
97 uc_priv->bank_name = priv->name;
102 static const struct dm_gpio_ops gpio_rockchip_ops = {
103 .direction_input = rockchip_gpio_direction_input,
104 .direction_output = rockchip_gpio_direction_output,
105 .get_value = rockchip_gpio_get_value,
106 .set_value = rockchip_gpio_set_value,
107 .get_function = rockchip_gpio_get_function,
108 .xlate = rockchip_gpio_xlate,
111 static const struct udevice_id rockchip_gpio_ids[] = {
112 { .compatible = "rockchip,gpio-bank" },
116 U_BOOT_DRIVER(gpio_rockchip) = {
117 .name = "gpio_rockchip",
119 .of_match = rockchip_gpio_ids,
120 .ops = &gpio_rockchip_ops,
121 .priv_auto_alloc_size = sizeof(struct rockchip_gpio_priv),
122 .probe = rockchip_gpio_probe,