1 /*
2 * Copyright (c) 2022 Schlumberger
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 */
6
7 #define DT_DRV_COMPAT infineon_xmc4xxx_pinctrl
8
9 #include <zephyr/devicetree.h>
10 #include <zephyr/drivers/pinctrl.h>
11 #include <zephyr/dt-bindings/pinctrl/xmc4xxx-pinctrl.h>
12
13 #include <xmc_gpio.h>
14
15 #define GPIO_REG_SIZE 0x100
16
pinctrl_configure_pin(const pinctrl_soc_pin_t pinmux)17 static int pinctrl_configure_pin(const pinctrl_soc_pin_t pinmux)
18 {
19 int port_id, pin, alt_fun, hwctrl;
20 XMC_GPIO_CONFIG_t pin_cfg = {0};
21 XMC_GPIO_PORT_t *gpio_port;
22
23 port_id = XMC4XXX_PINMUX_GET_PORT(pinmux);
24 if (port_id >= DT_INST_REG_SIZE(0) / GPIO_REG_SIZE) {
25 return -EINVAL;
26 }
27
28 pin = XMC4XXX_PINMUX_GET_PIN(pinmux);
29
30 if (XMC4XXX_PINMUX_GET_PULL_DOWN(pinmux)) {
31 pin_cfg.mode = XMC_GPIO_MODE_INPUT_PULL_DOWN;
32 }
33
34 if (XMC4XXX_PINMUX_GET_PULL_UP(pinmux)) {
35 pin_cfg.mode = XMC_GPIO_MODE_INPUT_PULL_UP;
36 }
37
38 if (XMC4XXX_PINMUX_GET_INV_INPUT(pinmux)) {
39 pin_cfg.mode |= 0x4;
40 }
41
42 if (XMC4XXX_PINMUX_GET_OPEN_DRAIN(pinmux)) {
43 pin_cfg.mode = XMC_GPIO_MODE_OUTPUT_OPEN_DRAIN;
44 }
45
46 if (XMC4XXX_PINMUX_GET_PUSH_PULL(pinmux)) {
47 pin_cfg.mode = XMC_GPIO_MODE_OUTPUT_PUSH_PULL;
48 }
49
50 alt_fun = XMC4XXX_PINMUX_GET_ALT(pinmux);
51 pin_cfg.mode |= alt_fun << PORT0_IOCR0_PC0_Pos;
52
53 /* only has effect if mode is push_pull */
54 if (XMC4XXX_PINMUX_GET_OUT_HIGH(pinmux)) {
55 pin_cfg.output_level = XMC_GPIO_OUTPUT_LEVEL_HIGH;
56 }
57
58 /* only has effect if mode is push_pull */
59 if (XMC4XXX_PINMUX_GET_OUT_LOW(pinmux)) {
60 pin_cfg.output_level = XMC_GPIO_OUTPUT_LEVEL_LOW;
61 }
62
63 /* only has effect if mode is push_pull */
64 pin_cfg.output_strength = XMC4XXX_PINMUX_GET_DRIVE(pinmux);
65
66 gpio_port = (XMC_GPIO_PORT_t *)((uint32_t)DT_INST_REG_ADDR(0) + port_id * GPIO_REG_SIZE);
67 XMC_GPIO_Init(gpio_port, pin, &pin_cfg);
68
69 hwctrl = XMC4XXX_PINMUX_GET_HWCTRL(pinmux);
70 if (hwctrl) {
71 XMC_GPIO_SetHardwareControl(gpio_port, pin, hwctrl);
72 }
73
74 return 0;
75 }
76
pinctrl_configure_pins(const pinctrl_soc_pin_t * pins,uint8_t pin_cnt,uintptr_t reg)77 int pinctrl_configure_pins(const pinctrl_soc_pin_t *pins, uint8_t pin_cnt, uintptr_t reg)
78 {
79 ARG_UNUSED(reg);
80
81 for (uint8_t i = 0U; i < pin_cnt; i++) {
82 int ret = pinctrl_configure_pin(*pins++);
83
84 if (ret < 0) {
85 return ret;
86 }
87 }
88
89 return 0;
90 }
91
