3 #include <dm/pinctrl.h>
4 #include <asm/arch/gpio.h>
8 DECLARE_GLOBAL_DATA_PTR;
10 #define MAX_PINS_ONE_IP 70
11 #define MODE_BITS_MASK 3
17 static int stm32_gpio_config(struct gpio_desc *desc,
18 const struct stm32_gpio_ctl *ctl)
20 struct stm32_gpio_priv *priv = dev_get_priv(desc->dev);
21 struct stm32_gpio_regs *regs = priv->regs;
24 if (!ctl || ctl->af > 15 || ctl->mode > 3 || ctl->otype > 1 ||
25 ctl->pupd > 2 || ctl->speed > 3)
28 index = (desc->offset & 0x07) * 4;
29 clrsetbits_le32(®s->afr[desc->offset >> 3], AFR_MASK << index,
32 index = desc->offset * 2;
33 clrsetbits_le32(®s->moder, MODE_BITS_MASK << index,
35 clrsetbits_le32(®s->ospeedr, OSPEED_MASK << index,
37 clrsetbits_le32(®s->pupdr, PUPD_MASK << index, ctl->pupd << index);
40 clrsetbits_le32(®s->otyper, OTYPE_MSK << index, ctl->otype << index);
44 static int prep_gpio_dsc(struct stm32_gpio_dsc *gpio_dsc, u32 port_pin)
46 gpio_dsc->port = (port_pin & 0xF000) >> 12;
47 gpio_dsc->pin = (port_pin & 0x0F00) >> 8;
48 debug("%s: GPIO:port= %d, pin= %d\n", __func__, gpio_dsc->port,
54 static int prep_gpio_ctl(struct stm32_gpio_ctl *gpio_ctl, u32 gpio_fn, int node)
61 gpio_ctl->mode = STM32_GPIO_MODE_IN;
64 gpio_ctl->mode = STM32_GPIO_MODE_AF;
65 gpio_ctl->af = gpio_fn - 1;
68 gpio_ctl->mode = STM32_GPIO_MODE_AN;
71 gpio_ctl->mode = STM32_GPIO_MODE_OUT;
75 gpio_ctl->speed = fdtdec_get_int(gd->fdt_blob, node, "slew-rate", 0);
77 if (fdtdec_get_bool(gd->fdt_blob, node, "drive-open-drain"))
78 gpio_ctl->otype = STM32_GPIO_OTYPE_OD;
80 gpio_ctl->otype = STM32_GPIO_OTYPE_PP;
82 if (fdtdec_get_bool(gd->fdt_blob, node, "bias-pull-up"))
83 gpio_ctl->pupd = STM32_GPIO_PUPD_UP;
84 else if (fdtdec_get_bool(gd->fdt_blob, node, "bias-pull-down"))
85 gpio_ctl->pupd = STM32_GPIO_PUPD_DOWN;
87 gpio_ctl->pupd = STM32_GPIO_PUPD_NO;
89 debug("%s: gpio fn= %d, slew-rate= %x, op type= %x, pull-upd is = %x\n",
90 __func__, gpio_fn, gpio_ctl->speed, gpio_ctl->otype,
96 static int stm32_pinctrl_config(int offset)
98 u32 pin_mux[MAX_PINS_ONE_IP];
102 * check for "pinmux" property in each subnode (e.g. pins1 and pins2 for
103 * usart1) of pin controller phandle "pinctrl-0"
105 fdt_for_each_subnode(offset, gd->fdt_blob, offset) {
106 struct stm32_gpio_dsc gpio_dsc;
107 struct stm32_gpio_ctl gpio_ctl;
110 len = fdtdec_get_int_array_count(gd->fdt_blob, offset,
112 ARRAY_SIZE(pin_mux));
113 debug("%s: no of pinmux entries= %d\n", __func__, len);
116 for (i = 0; i < len; i++) {
117 struct gpio_desc desc;
118 debug("%s: pinmux = %x\n", __func__, *(pin_mux + i));
119 prep_gpio_dsc(&gpio_dsc, *(pin_mux + i));
120 prep_gpio_ctl(&gpio_ctl, *(pin_mux + i), offset);
121 rv = uclass_get_device_by_seq(UCLASS_GPIO,
122 gpio_dsc.port, &desc.dev);
125 desc.offset = gpio_dsc.pin;
126 rv = stm32_gpio_config(&desc, &gpio_ctl);
127 debug("%s: rv = %d\n\n", __func__, rv);
136 #if CONFIG_IS_ENABLED(PINCTRL_FULL)
137 static int stm32_pinctrl_set_state(struct udevice *dev, struct udevice *config)
139 return stm32_pinctrl_config(dev_of_offset(config));
141 #else /* PINCTRL_FULL */
142 static int stm32_pinctrl_set_state_simple(struct udevice *dev,
143 struct udevice *periph)
145 const void *fdt = gd->fdt_blob;
151 list = fdt_getprop(fdt, dev_of_offset(periph), "pinctrl-0", &size);
155 debug("%s: periph->name = %s\n", __func__, periph->name);
157 size /= sizeof(*list);
158 for (i = 0; i < size; i++) {
159 phandle = fdt32_to_cpu(*list++);
161 config_node = fdt_node_offset_by_phandle(fdt, phandle);
162 if (config_node < 0) {
163 pr_err("prop pinctrl-0 index %d invalid phandle\n", i);
167 ret = stm32_pinctrl_config(config_node);
174 #endif /* PINCTRL_FULL */
176 static struct pinctrl_ops stm32_pinctrl_ops = {
177 #if CONFIG_IS_ENABLED(PINCTRL_FULL)
178 .set_state = stm32_pinctrl_set_state,
179 #else /* PINCTRL_FULL */
180 .set_state_simple = stm32_pinctrl_set_state_simple,
181 #endif /* PINCTRL_FULL */
184 static const struct udevice_id stm32_pinctrl_ids[] = {
185 { .compatible = "st,stm32f429-pinctrl" },
186 { .compatible = "st,stm32f469-pinctrl" },
187 { .compatible = "st,stm32f746-pinctrl" },
188 { .compatible = "st,stm32h743-pinctrl" },
192 U_BOOT_DRIVER(pinctrl_stm32) = {
193 .name = "pinctrl_stm32",
194 .id = UCLASS_PINCTRL,
195 .of_match = stm32_pinctrl_ids,
196 .ops = &stm32_pinctrl_ops,
197 .bind = dm_scan_fdt_dev,