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/pmic_bus.h>
13 #include <dm/device-internal.h>
18 static int axp_gpio_set_value(struct udevice *dev, unsigned pin, int val);
20 static u8 axp_get_gpio_ctrl_reg(unsigned pin)
23 case 0: return AXP_GPIO0_CTRL;
24 case 1: return AXP_GPIO1_CTRL;
26 case 2: return AXP_GPIO2_CTRL;
29 case 3: return AXP_GPIO3_CTRL;
35 static int axp_gpio_direction_input(struct udevice *dev, unsigned pin)
40 #ifndef CONFIG_AXP152_POWER /* NA on axp152 */
41 case SUNXI_GPIO_AXP0_VBUS_DETECT:
45 reg = axp_get_gpio_ctrl_reg(pin);
49 return pmic_bus_write(reg, AXP_GPIO_CTRL_INPUT);
53 static int axp_gpio_direction_output(struct udevice *dev, unsigned pin,
56 __maybe_unused int ret;
60 #ifdef AXP_MISC_CTRL_N_VBUSEN_FUNC
61 /* Only available on later PMICs */
62 case SUNXI_GPIO_AXP0_VBUS_ENABLE:
63 ret = pmic_bus_clrbits(AXP_MISC_CTRL,
64 AXP_MISC_CTRL_N_VBUSEN_FUNC);
68 return axp_gpio_set_value(dev, pin, val);
71 reg = axp_get_gpio_ctrl_reg(pin);
75 return pmic_bus_write(reg, val ? AXP_GPIO_CTRL_OUTPUT_HIGH :
76 AXP_GPIO_CTRL_OUTPUT_LOW);
80 static int axp_gpio_get_value(struct udevice *dev, unsigned pin)
86 #ifndef CONFIG_AXP152_POWER /* NA on axp152 */
87 case SUNXI_GPIO_AXP0_VBUS_DETECT:
88 ret = pmic_bus_read(AXP_POWER_STATUS, &val);
89 mask = AXP_POWER_STATUS_VBUS_PRESENT;
92 #ifdef AXP_MISC_CTRL_N_VBUSEN_FUNC
93 /* Only available on later PMICs */
94 case SUNXI_GPIO_AXP0_VBUS_ENABLE:
95 ret = pmic_bus_read(AXP_VBUS_IPSOUT, &val);
96 mask = AXP_VBUS_IPSOUT_DRIVEBUS;
100 reg = axp_get_gpio_ctrl_reg(pin);
104 ret = pmic_bus_read(AXP_GPIO_STATE, &val);
105 mask = 1 << (pin + AXP_GPIO_STATE_OFFSET);
110 return (val & mask) ? 1 : 0;
113 static int axp_gpio_set_value(struct udevice *dev, unsigned pin, int val)
118 #ifdef AXP_MISC_CTRL_N_VBUSEN_FUNC
119 /* Only available on later PMICs */
120 case SUNXI_GPIO_AXP0_VBUS_ENABLE:
122 return pmic_bus_setbits(AXP_VBUS_IPSOUT,
123 AXP_VBUS_IPSOUT_DRIVEBUS);
125 return pmic_bus_clrbits(AXP_VBUS_IPSOUT,
126 AXP_VBUS_IPSOUT_DRIVEBUS);
129 reg = axp_get_gpio_ctrl_reg(pin);
133 return pmic_bus_write(reg, val ? AXP_GPIO_CTRL_OUTPUT_HIGH :
134 AXP_GPIO_CTRL_OUTPUT_LOW);
138 static const struct dm_gpio_ops gpio_axp_ops = {
139 .direction_input = axp_gpio_direction_input,
140 .direction_output = axp_gpio_direction_output,
141 .get_value = axp_gpio_get_value,
142 .set_value = axp_gpio_set_value,
145 static int gpio_axp_probe(struct udevice *dev)
147 struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
149 /* Tell the uclass how many GPIOs we have */
150 uc_priv->bank_name = strdup(SUNXI_GPIO_AXP0_PREFIX);
151 uc_priv->gpio_count = SUNXI_GPIO_AXP0_GPIO_COUNT;
156 U_BOOT_DRIVER(gpio_axp) = {
159 .ops = &gpio_axp_ops,
160 .probe = gpio_axp_probe,
163 int axp_gpio_init(void)
168 ret = pmic_bus_init();
172 /* There is no devicetree support for the axp yet, so bind directly */
173 ret = device_bind_driver(dm_root(), "gpio_axp", "AXP-gpio", &dev);