1 // SPDX-License-Identifier: GPL-2.0+
3 * (C) Copyright 2015 Hans de Goede <hdegoede@redhat.com>
5 * X-Powers AXP Power Management ICs gpio driver
9 #include <asm/arch/gpio.h>
10 #include <asm/arch/pmic_bus.h>
14 #include <dm/device-internal.h>
19 static int axp_gpio_set_value(struct udevice *dev, unsigned pin, int val);
21 static u8 axp_get_gpio_ctrl_reg(unsigned pin)
24 case 0: return AXP_GPIO0_CTRL;
25 case 1: return AXP_GPIO1_CTRL;
27 case 2: return AXP_GPIO2_CTRL;
30 case 3: return AXP_GPIO3_CTRL;
36 static int axp_gpio_direction_input(struct udevice *dev, unsigned pin)
41 #ifndef CONFIG_AXP152_POWER /* NA on axp152 */
42 case SUNXI_GPIO_AXP0_VBUS_DETECT:
46 reg = axp_get_gpio_ctrl_reg(pin);
50 return pmic_bus_write(reg, AXP_GPIO_CTRL_INPUT);
54 static int axp_gpio_direction_output(struct udevice *dev, unsigned pin,
57 __maybe_unused int ret;
61 #ifdef AXP_MISC_CTRL_N_VBUSEN_FUNC
62 /* Only available on later PMICs */
63 case SUNXI_GPIO_AXP0_VBUS_ENABLE:
64 ret = pmic_bus_clrbits(AXP_MISC_CTRL,
65 AXP_MISC_CTRL_N_VBUSEN_FUNC);
69 return axp_gpio_set_value(dev, pin, val);
72 reg = axp_get_gpio_ctrl_reg(pin);
76 return pmic_bus_write(reg, val ? AXP_GPIO_CTRL_OUTPUT_HIGH :
77 AXP_GPIO_CTRL_OUTPUT_LOW);
81 static int axp_gpio_get_value(struct udevice *dev, unsigned pin)
87 #ifndef CONFIG_AXP152_POWER /* NA on axp152 */
88 case SUNXI_GPIO_AXP0_VBUS_DETECT:
89 ret = pmic_bus_read(AXP_POWER_STATUS, &val);
90 mask = AXP_POWER_STATUS_VBUS_PRESENT;
93 #ifdef AXP_MISC_CTRL_N_VBUSEN_FUNC
94 /* Only available on later PMICs */
95 case SUNXI_GPIO_AXP0_VBUS_ENABLE:
96 ret = pmic_bus_read(AXP_VBUS_IPSOUT, &val);
97 mask = AXP_VBUS_IPSOUT_DRIVEBUS;
101 reg = axp_get_gpio_ctrl_reg(pin);
105 ret = pmic_bus_read(AXP_GPIO_STATE, &val);
106 mask = 1 << (pin + AXP_GPIO_STATE_OFFSET);
111 return (val & mask) ? 1 : 0;
114 static int axp_gpio_set_value(struct udevice *dev, unsigned pin, int val)
119 #ifdef AXP_MISC_CTRL_N_VBUSEN_FUNC
120 /* Only available on later PMICs */
121 case SUNXI_GPIO_AXP0_VBUS_ENABLE:
123 return pmic_bus_setbits(AXP_VBUS_IPSOUT,
124 AXP_VBUS_IPSOUT_DRIVEBUS);
126 return pmic_bus_clrbits(AXP_VBUS_IPSOUT,
127 AXP_VBUS_IPSOUT_DRIVEBUS);
130 reg = axp_get_gpio_ctrl_reg(pin);
134 return pmic_bus_write(reg, val ? AXP_GPIO_CTRL_OUTPUT_HIGH :
135 AXP_GPIO_CTRL_OUTPUT_LOW);
139 static const struct dm_gpio_ops gpio_axp_ops = {
140 .direction_input = axp_gpio_direction_input,
141 .direction_output = axp_gpio_direction_output,
142 .get_value = axp_gpio_get_value,
143 .set_value = axp_gpio_set_value,
146 static int gpio_axp_probe(struct udevice *dev)
148 struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
150 /* Tell the uclass how many GPIOs we have */
151 uc_priv->bank_name = strdup(SUNXI_GPIO_AXP0_PREFIX);
152 uc_priv->gpio_count = SUNXI_GPIO_AXP0_GPIO_COUNT;
157 U_BOOT_DRIVER(gpio_axp) = {
160 .ops = &gpio_axp_ops,
161 .probe = gpio_axp_probe,
164 int axp_gpio_init(void)
169 ret = pmic_bus_init();
173 /* There is no devicetree support for the axp yet, so bind directly */
174 ret = device_bind_driver(dm_root(), "gpio_axp", "AXP-gpio", &dev);