1 // SPDX-License-Identifier: GPL-2.0+
3 * (C) Copyright 2016 - Beniamino Galvani <b.galvani@gmail.com>
9 #include <dm/pinctrl.h>
11 #include "pinctrl-meson-gx.h"
13 static void meson_gx_pinmux_disable_other_groups(struct meson_pinctrl *priv,
17 struct meson_pmx_group *group;
18 struct meson_gx_pmx_data *pmx_data;
22 for (i = 0; i < priv->data->num_groups; i++) {
23 group = &priv->data->groups[i];
24 pmx_data = (struct meson_gx_pmx_data *)group->data;
25 if (pmx_data->is_gpio || i == sel_group)
28 for (j = 0; j < group->num_pins; j++) {
29 if (group->pins[j] == pin) {
30 /* We have found a group using the pin */
31 debug("pinmux: disabling %s\n", group->name);
32 addr = priv->reg_mux + pmx_data->reg * 4;
33 writel(readl(addr) & ~BIT(pmx_data->bit), addr);
39 static int meson_gx_pinmux_group_set(struct udevice *dev,
40 unsigned int group_selector,
41 unsigned int func_selector)
43 struct meson_pinctrl *priv = dev_get_priv(dev);
44 const struct meson_pmx_group *group;
45 const struct meson_pmx_func *func;
46 struct meson_gx_pmx_data *pmx_data;
50 group = &priv->data->groups[group_selector];
51 pmx_data = (struct meson_gx_pmx_data *)group->data;
52 func = &priv->data->funcs[func_selector];
54 debug("pinmux: set group %s func %s\n", group->name, func->name);
57 * Disable groups using the same pins.
58 * The selected group is not disabled to avoid glitches.
60 for (i = 0; i < group->num_pins; i++) {
61 meson_gx_pinmux_disable_other_groups(priv,
66 /* Function 0 (GPIO) doesn't need any additional setting */
68 addr = priv->reg_mux + pmx_data->reg * 4;
69 writel(readl(addr) | BIT(pmx_data->bit), addr);
75 static int meson_gx_pinmux_get(struct udevice *dev,
76 unsigned int selector,
79 struct meson_pinctrl *priv = dev_get_priv(dev);
80 struct meson_pmx_group *group;
81 struct meson_gx_pmx_data *pmx_data;
87 pin = selector + priv->data->pin_base;
89 for (i = 0; i < priv->data->num_groups; i++) {
90 group = &priv->data->groups[i];
91 pmx_data = (struct meson_gx_pmx_data *)group->data;
92 if (pmx_data->is_gpio)
95 for (j = 0; j < group->num_pins; j++) {
96 if (group->pins[j] == pin) {
97 /* We have found a group using the pin */
98 addr = priv->reg_mux + pmx_data->reg * 4;
99 reg = readl(addr) & BIT(pmx_data->bit);
101 pos += snprintf(buf + pos, size - pos,
102 "%s ", group->name) - 1;
109 /* Fallback, must be used as GPIO */
110 snprintf(buf, size, "%s or Unknown",
111 priv->data->groups[selector].name);
116 const struct pinconf_param meson_gx_pinconf_params[] = {
117 { "bias-disable", PIN_CONFIG_BIAS_DISABLE, 0 },
118 { "bias-pull-up", PIN_CONFIG_BIAS_PULL_UP, 1 },
119 { "bias-pull-down", PIN_CONFIG_BIAS_PULL_DOWN, 1 },
122 const struct pinctrl_ops meson_gx_pinctrl_ops = {
123 .get_groups_count = meson_pinctrl_get_groups_count,
124 .get_group_name = meson_pinctrl_get_group_name,
125 .get_functions_count = meson_pinmux_get_functions_count,
126 .get_function_name = meson_pinmux_get_function_name,
127 .pinmux_group_set = meson_gx_pinmux_group_set,
128 .set_state = pinctrl_generic_set_state,
129 .pinconf_params = meson_gx_pinconf_params,
130 .pinconf_num_params = ARRAY_SIZE(meson_gx_pinconf_params),
131 .pinconf_set = meson_pinconf_set,
132 .pinconf_group_set = meson_pinconf_group_set,
133 .get_pin_name = meson_pinctrl_get_pin_name,
134 .get_pins_count = meson_pinctrl_get_pins_count,
135 .get_pin_muxing = meson_gx_pinmux_get,
138 static const struct dm_gpio_ops meson_gx_gpio_ops = {
139 .set_value = meson_gpio_set,
140 .get_value = meson_gpio_get,
141 .get_function = meson_gpio_get_direction,
142 .direction_input = meson_gpio_direction_input,
143 .direction_output = meson_gpio_direction_output,
146 const struct driver meson_gx_gpio_driver = {
147 .name = "meson-gx-gpio",
149 .probe = meson_gpio_probe,
150 .ops = &meson_gx_gpio_ops,