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>
14 #include <dm/device-internal.h>
19 #ifdef CONFIG_AXP152_POWER
21 #elif defined CONFIG_AXP209_POWER
23 #elif defined CONFIG_AXP221_POWER
26 #error Unknown AXP model
29 static int axp_gpio_set_value(struct udevice *dev, unsigned pin, int val);
31 static u8 axp_get_gpio_ctrl_reg(unsigned pin)
34 case 0: return AXP_GPIO0_CTRL;
35 case 1: return AXP_GPIO1_CTRL;
37 case 2: return AXP_GPIO2_CTRL;
40 case 3: return AXP_GPIO3_CTRL;
46 static int axp_gpio_direction_input(struct udevice *dev, unsigned pin)
51 #ifndef CONFIG_AXP152_POWER /* NA on axp152 */
52 case SUNXI_GPIO_AXP0_VBUS_DETECT:
56 reg = axp_get_gpio_ctrl_reg(pin);
60 return pmic_bus_write(reg, AXP_GPIO_CTRL_INPUT);
64 static int axp_gpio_direction_output(struct udevice *dev, unsigned pin,
67 __maybe_unused int ret;
71 #ifdef CONFIG_AXP221_POWER /* Only available on axp221/axp223 */
72 case SUNXI_GPIO_AXP0_VBUS_ENABLE:
73 ret = pmic_bus_clrbits(AXP221_MISC_CTRL,
74 AXP221_MISC_CTRL_N_VBUSEN_FUNC);
78 return axp_gpio_set_value(dev, pin, val);
81 reg = axp_get_gpio_ctrl_reg(pin);
85 return pmic_bus_write(reg, val ? AXP_GPIO_CTRL_OUTPUT_HIGH :
86 AXP_GPIO_CTRL_OUTPUT_LOW);
90 static int axp_gpio_get_value(struct udevice *dev, unsigned pin)
96 #ifndef CONFIG_AXP152_POWER /* NA on axp152 */
97 case SUNXI_GPIO_AXP0_VBUS_DETECT:
98 ret = pmic_bus_read(AXP_POWER_STATUS, &val);
99 mask = AXP_POWER_STATUS_VBUS_PRESENT;
102 #ifdef CONFIG_AXP221_POWER /* Only available on axp221/axp223 */
103 case SUNXI_GPIO_AXP0_VBUS_ENABLE:
104 ret = pmic_bus_read(AXP221_VBUS_IPSOUT, &val);
105 mask = AXP221_VBUS_IPSOUT_DRIVEBUS;
109 reg = axp_get_gpio_ctrl_reg(pin);
113 ret = pmic_bus_read(AXP_GPIO_STATE, &val);
114 mask = 1 << (pin + AXP_GPIO_STATE_OFFSET);
119 return (val & mask) ? 1 : 0;
122 static int axp_gpio_set_value(struct udevice *dev, unsigned pin, int val)
127 #ifdef CONFIG_AXP221_POWER /* Only available on axp221/axp223 */
128 case SUNXI_GPIO_AXP0_VBUS_ENABLE:
130 return pmic_bus_setbits(AXP221_VBUS_IPSOUT,
131 AXP221_VBUS_IPSOUT_DRIVEBUS);
133 return pmic_bus_clrbits(AXP221_VBUS_IPSOUT,
134 AXP221_VBUS_IPSOUT_DRIVEBUS);
137 reg = axp_get_gpio_ctrl_reg(pin);
141 return pmic_bus_write(reg, val ? AXP_GPIO_CTRL_OUTPUT_HIGH :
142 AXP_GPIO_CTRL_OUTPUT_LOW);
146 static const struct dm_gpio_ops gpio_axp_ops = {
147 .direction_input = axp_gpio_direction_input,
148 .direction_output = axp_gpio_direction_output,
149 .get_value = axp_gpio_get_value,
150 .set_value = axp_gpio_set_value,
153 static int gpio_axp_probe(struct udevice *dev)
155 struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
157 /* Tell the uclass how many GPIOs we have */
158 uc_priv->bank_name = strdup(SUNXI_GPIO_AXP0_PREFIX);
159 uc_priv->gpio_count = SUNXI_GPIO_AXP0_GPIO_COUNT;
164 U_BOOT_DRIVER(gpio_axp) = {
167 .ops = &gpio_axp_ops,
168 .probe = gpio_axp_probe,
171 int axp_gpio_init(void)
176 ret = pmic_bus_init();
180 /* There is no devicetree support for the axp yet, so bind directly */
181 ret = device_bind_driver(dm_root(), "gpio_axp", "AXP-gpio", &dev);