2 * (C) Copyright 2015 Hans de Goede <hdegoede@redhat.com>
4 * X-Powers AXP Power Management ICs gpio driver
6 * SPDX-License-Identifier: GPL-2.0+
10 #include <asm/arch/gpio.h>
11 #include <asm/arch/pmic_bus.h>
15 #include <dm/device-internal.h>
20 static int axp_gpio_set_value(struct udevice *dev, unsigned pin, int val);
22 static u8 axp_get_gpio_ctrl_reg(unsigned pin)
25 case 0: return AXP_GPIO0_CTRL;
26 case 1: return AXP_GPIO1_CTRL;
28 case 2: return AXP_GPIO2_CTRL;
31 case 3: return AXP_GPIO3_CTRL;
37 static int axp_gpio_direction_input(struct udevice *dev, unsigned pin)
42 #ifndef CONFIG_AXP152_POWER /* NA on axp152 */
43 case SUNXI_GPIO_AXP0_VBUS_DETECT:
47 reg = axp_get_gpio_ctrl_reg(pin);
51 return pmic_bus_write(reg, AXP_GPIO_CTRL_INPUT);
55 static int axp_gpio_direction_output(struct udevice *dev, unsigned pin,
58 __maybe_unused int ret;
62 #ifdef CONFIG_AXP221_POWER /* Only available on axp221/axp223 */
63 case SUNXI_GPIO_AXP0_VBUS_ENABLE:
64 ret = pmic_bus_clrbits(AXP221_MISC_CTRL,
65 AXP221_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 CONFIG_AXP221_POWER /* Only available on axp221/axp223 */
94 case SUNXI_GPIO_AXP0_VBUS_ENABLE:
95 ret = pmic_bus_read(AXP221_VBUS_IPSOUT, &val);
96 mask = AXP221_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 CONFIG_AXP221_POWER /* Only available on axp221/axp223 */
119 case SUNXI_GPIO_AXP0_VBUS_ENABLE:
121 return pmic_bus_setbits(AXP221_VBUS_IPSOUT,
122 AXP221_VBUS_IPSOUT_DRIVEBUS);
124 return pmic_bus_clrbits(AXP221_VBUS_IPSOUT,
125 AXP221_VBUS_IPSOUT_DRIVEBUS);
128 reg = axp_get_gpio_ctrl_reg(pin);
132 return pmic_bus_write(reg, val ? AXP_GPIO_CTRL_OUTPUT_HIGH :
133 AXP_GPIO_CTRL_OUTPUT_LOW);
137 static const struct dm_gpio_ops gpio_axp_ops = {
138 .direction_input = axp_gpio_direction_input,
139 .direction_output = axp_gpio_direction_output,
140 .get_value = axp_gpio_get_value,
141 .set_value = axp_gpio_set_value,
144 static int gpio_axp_probe(struct udevice *dev)
146 struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
148 /* Tell the uclass how many GPIOs we have */
149 uc_priv->bank_name = strdup(SUNXI_GPIO_AXP0_PREFIX);
150 uc_priv->gpio_count = SUNXI_GPIO_AXP0_GPIO_COUNT;
155 U_BOOT_DRIVER(gpio_axp) = {
158 .ops = &gpio_axp_ops,
159 .probe = gpio_axp_probe,
162 int axp_gpio_init(void)
167 ret = pmic_bus_init();
171 /* There is no devicetree support for the axp yet, so bind directly */
172 ret = device_bind_driver(dm_root(), "gpio_axp", "AXP-gpio", &dev);