1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2020 Cortina-Access
5 * GPIO Driver for Cortina Access CAxxxx Line of SoCs
12 #include <linux/compat.h>
13 #include <linux/compiler.h>
15 /* GPIO Register Map */
16 #define CORTINA_GPIO_CFG 0x00
17 #define CORTINA_GPIO_OUT 0x04
18 #define CORTINA_GPIO_IN 0x08
19 #define CORTINA_GPIO_LVL 0x0C
20 #define CORTINA_GPIO_EDGE 0x10
21 #define CORTINA_GPIO_BOTHEDGE 0x14
22 #define CORTINA_GPIO_IE 0x18
23 #define CORTINA_GPIO_INT 0x1C
24 #define CORTINA_GPIO_STAT 0x20
26 struct cortina_gpio_bank {
31 static int ca_gpio_direction_input(struct udevice *dev, unsigned int offset)
33 struct cortina_gpio_bank *priv = dev_get_priv(dev);
35 setbits_32(priv->base, BIT(offset));
40 ca_gpio_direction_output(struct udevice *dev, unsigned int offset, int value)
42 struct cortina_gpio_bank *priv = dev_get_priv(dev);
44 clrbits_32(priv->base, BIT(offset));
48 static int ca_gpio_get_value(struct udevice *dev, unsigned int offset)
50 struct cortina_gpio_bank *priv = dev_get_priv(dev);
52 return readl(priv->base + CORTINA_GPIO_IN) & BIT(offset);
55 static int ca_gpio_set_value(struct udevice *dev, unsigned int offset,
58 struct cortina_gpio_bank *priv = dev_get_priv(dev);
60 setbits_32(priv->base + CORTINA_GPIO_OUT, BIT(offset));
64 static int ca_gpio_get_function(struct udevice *dev, unsigned int offset)
66 struct cortina_gpio_bank *priv = dev_get_priv(dev);
68 if (readl(priv->base) & BIT(offset))
74 static const struct dm_gpio_ops gpio_cortina_ops = {
75 .direction_input = ca_gpio_direction_input,
76 .direction_output = ca_gpio_direction_output,
77 .get_value = ca_gpio_get_value,
78 .set_value = ca_gpio_set_value,
79 .get_function = ca_gpio_get_function,
82 static int ca_gpio_probe(struct udevice *dev)
84 struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
85 struct cortina_gpio_bank *priv = dev_get_priv(dev);
87 priv->base = dev_remap_addr_index(dev, 0);
91 uc_priv->gpio_count = dev_read_u32_default(dev, "ngpios", 32);
92 uc_priv->bank_name = dev->name;
94 debug("Done Cortina GPIO init\n");
98 static const struct udevice_id ca_gpio_ids[] = {
99 {.compatible = "cortina,ca-gpio"},
103 U_BOOT_DRIVER(cortina_gpio) = {
104 .name = "cortina-gpio",
106 .ops = &gpio_cortina_ops,
107 .probe = ca_gpio_probe,
108 .priv_auto_alloc_size = sizeof(struct cortina_gpio_bank),
109 .of_match = ca_gpio_ids,
111 #endif /* CONFIG_DM_GPIO */