2 #include <asm/arch/gpio.h>
4 #include <dm/pinctrl.h>
6 DECLARE_GLOBAL_DATA_PTR;
8 static int prep_gpio_dsc(struct stm32_gpio_dsc *gpio_dsc, u32 port_pin)
10 gpio_dsc->port = (port_pin & 0xF000) >> 12;
11 gpio_dsc->pin = (port_pin & 0x0F00) >> 8;
12 debug("%s: GPIO:port= %d, pin= %d\n", __func__, gpio_dsc->port,
18 static int prep_gpio_ctl(struct stm32_gpio_ctl *gpio_ctl, u32 gpio_fn, int node)
24 gpio_ctl->mode = STM32_GPIO_MODE_IN;
27 gpio_ctl->mode = STM32_GPIO_MODE_AF;
28 gpio_ctl->af = gpio_fn - 1;
31 gpio_ctl->mode = STM32_GPIO_MODE_AN;
34 gpio_ctl->mode = STM32_GPIO_MODE_OUT;
38 gpio_ctl->speed = fdtdec_get_int(gd->fdt_blob, node, "slew-rate", 0);
40 if (fdtdec_get_bool(gd->fdt_blob, node, "drive-open-drain"))
41 gpio_ctl->otype = STM32_GPIO_OTYPE_OD;
43 gpio_ctl->otype = STM32_GPIO_OTYPE_PP;
45 if (fdtdec_get_bool(gd->fdt_blob, node, "bias-pull-up"))
46 gpio_ctl->pupd = STM32_GPIO_PUPD_UP;
47 else if (fdtdec_get_bool(gd->fdt_blob, node, "bias-pull-down"))
48 gpio_ctl->pupd = STM32_GPIO_PUPD_DOWN;
50 gpio_ctl->pupd = STM32_GPIO_PUPD_NO;
52 debug("%s: gpio fn= %d, slew-rate= %x, op type= %x, pull-upd is = %x\n",
53 __func__, gpio_fn, gpio_ctl->speed, gpio_ctl->otype,
59 static int stm32_pinctrl_set_state_simple(struct udevice *dev,
60 struct udevice *periph)
63 struct fdtdec_phandle_args args;
66 /* Get node pinctrl-0 */
67 rv = fdtdec_parse_phandle_with_args(gd->fdt_blob, periph->of_offset,
68 "pinctrl-0", 0, 0, 0, &args);
72 * check for "pinmux" property in each subnode (e.g. pins1 and pins2 for
73 * usart1) of pin controller phandle "pinctrl-0"
75 fdt_for_each_subnode(args.node, gd->fdt_blob, args.node) {
76 struct stm32_gpio_dsc gpio_dsc;
77 struct stm32_gpio_ctl gpio_ctl;
80 len = fdtdec_get_int_array_count(gd->fdt_blob, args.node,
83 debug("%s: periph->name = %s, no of pinmux entries= %d\n",
84 __func__, periph->name, len);
87 for (i = 0; i < len; i++) {
88 debug("%s: pinmux = %x\n", __func__, *(pin_mux + i));
89 prep_gpio_dsc(&gpio_dsc, *(pin_mux + i));
90 prep_gpio_ctl(&gpio_ctl, *(pin_mux + i), args.node);
92 rv = stm32_gpio_config(&gpio_dsc, &gpio_ctl);
93 debug("%s: rv = %d\n\n", __func__, rv);
102 static struct pinctrl_ops stm32_pinctrl_ops = {
103 .set_state_simple = stm32_pinctrl_set_state_simple,
106 static const struct udevice_id stm32_pinctrl_ids[] = {
107 { .compatible = "st,stm32f746-pinctrl" },
111 U_BOOT_DRIVER(pinctrl_stm32) = {
112 .name = "pinctrl_stm32",
113 .id = UCLASS_PINCTRL,
114 .of_match = stm32_pinctrl_ids,
115 .ops = &stm32_pinctrl_ops,
116 .bind = dm_scan_fdt_dev,