2 * Freescale i.MX28 GPIO control code
4 * Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com>
5 * on behalf of DENX Software Engineering GmbH
7 * SPDX-License-Identifier: GPL-2.0+
12 #include <asm/errno.h>
14 #include <asm/arch/iomux.h>
15 #include <asm/arch/imx-regs.h>
17 #if defined(CONFIG_MX23)
18 #define PINCTRL_BANKS 3
19 #define PINCTRL_DOUT(n) (0x0500 + ((n) * 0x10))
20 #define PINCTRL_DIN(n) (0x0600 + ((n) * 0x10))
21 #define PINCTRL_DOE(n) (0x0700 + ((n) * 0x10))
22 #define PINCTRL_PIN2IRQ(n) (0x0800 + ((n) * 0x10))
23 #define PINCTRL_IRQEN(n) (0x0900 + ((n) * 0x10))
24 #define PINCTRL_IRQSTAT(n) (0x0c00 + ((n) * 0x10))
25 #elif defined(CONFIG_MX28)
26 #define PINCTRL_BANKS 5
27 #define PINCTRL_DOUT(n) (0x0700 + ((n) * 0x10))
28 #define PINCTRL_DIN(n) (0x0900 + ((n) * 0x10))
29 #define PINCTRL_DOE(n) (0x0b00 + ((n) * 0x10))
30 #define PINCTRL_PIN2IRQ(n) (0x1000 + ((n) * 0x10))
31 #define PINCTRL_IRQEN(n) (0x1100 + ((n) * 0x10))
32 #define PINCTRL_IRQSTAT(n) (0x1400 + ((n) * 0x10))
34 #error "Please select CONFIG_MX23 or CONFIG_MX28"
37 #define GPIO_INT_FALL_EDGE 0x0
38 #define GPIO_INT_LOW_LEV 0x1
39 #define GPIO_INT_RISE_EDGE 0x2
40 #define GPIO_INT_HIGH_LEV 0x3
41 #define GPIO_INT_LEV_MASK (1 << 0)
42 #define GPIO_INT_POL_MASK (1 << 1)
44 void mxs_gpio_init(void)
48 for (i = 0; i < PINCTRL_BANKS; i++) {
49 writel(0, MXS_PINCTRL_BASE + PINCTRL_PIN2IRQ(i));
50 writel(0, MXS_PINCTRL_BASE + PINCTRL_IRQEN(i));
51 /* Use SCT address here to clear the IRQSTAT bits */
52 writel(0xffffffff, MXS_PINCTRL_BASE + PINCTRL_IRQSTAT(i) + 8);
56 int gpio_get_value(unsigned gpio)
58 uint32_t bank = PAD_BANK(gpio);
59 uint32_t offset = PINCTRL_DIN(bank);
60 struct mxs_register_32 *reg =
61 (struct mxs_register_32 *)(MXS_PINCTRL_BASE + offset);
63 return (readl(®->reg) >> PAD_PIN(gpio)) & 1;
66 void gpio_set_value(unsigned gpio, int value)
68 uint32_t bank = PAD_BANK(gpio);
69 uint32_t offset = PINCTRL_DOUT(bank);
70 struct mxs_register_32 *reg =
71 (struct mxs_register_32 *)(MXS_PINCTRL_BASE + offset);
74 writel(1 << PAD_PIN(gpio), ®->reg_set);
76 writel(1 << PAD_PIN(gpio), ®->reg_clr);
79 int gpio_direction_input(unsigned gpio)
81 uint32_t bank = PAD_BANK(gpio);
82 uint32_t offset = PINCTRL_DOE(bank);
83 struct mxs_register_32 *reg =
84 (struct mxs_register_32 *)(MXS_PINCTRL_BASE + offset);
86 writel(1 << PAD_PIN(gpio), ®->reg_clr);
91 int gpio_direction_output(unsigned gpio, int value)
93 uint32_t bank = PAD_BANK(gpio);
94 uint32_t offset = PINCTRL_DOE(bank);
95 struct mxs_register_32 *reg =
96 (struct mxs_register_32 *)(MXS_PINCTRL_BASE + offset);
98 gpio_set_value(gpio, value);
100 writel(1 << PAD_PIN(gpio), ®->reg_set);
105 int gpio_request(unsigned gpio, const char *label)
107 if (PAD_BANK(gpio) >= PINCTRL_BANKS)
113 int gpio_free(unsigned gpio)
118 int name_to_gpio(const char *name)
123 bank = simple_strtoul(name, &end, 10);
125 if (!*end || *end != ':')
128 pin = simple_strtoul(end + 1, NULL, 10);
130 return (bank << MXS_PAD_BANK_SHIFT) | (pin << MXS_PAD_PIN_SHIFT);