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 u8 axp_get_gpio_ctrl_reg(unsigned pin)
32 case 0: return AXP_GPIO0_CTRL;
33 case 1: return AXP_GPIO1_CTRL;
35 case 2: return AXP_GPIO2_CTRL;
38 case 3: return AXP_GPIO3_CTRL;
44 int axp_gpio_direction_input(struct udevice *dev, unsigned pin)
49 #ifndef CONFIG_AXP152_POWER /* NA on axp152 */
50 case SUNXI_GPIO_AXP0_VBUS_DETECT:
54 reg = axp_get_gpio_ctrl_reg(pin);
58 return pmic_bus_write(reg, AXP_GPIO_CTRL_INPUT);
62 int axp_gpio_direction_output(struct udevice *dev, unsigned pin, int val)
64 __maybe_unused int ret;
68 #ifdef CONFIG_AXP221_POWER /* Only available on axp221/axp223 */
69 case SUNXI_GPIO_AXP0_VBUS_ENABLE:
70 ret = pmic_bus_clrbits(AXP221_MISC_CTRL,
71 AXP221_MISC_CTRL_N_VBUSEN_FUNC);
75 return axp_gpio_set_value(dev, pin, val);
78 reg = axp_get_gpio_ctrl_reg(pin);
82 return pmic_bus_write(reg, val ? AXP_GPIO_CTRL_OUTPUT_HIGH :
83 AXP_GPIO_CTRL_OUTPUT_LOW);
87 int axp_gpio_get_value(struct udevice *dev, unsigned pin)
93 #ifndef CONFIG_AXP152_POWER /* NA on axp152 */
94 case SUNXI_GPIO_AXP0_VBUS_DETECT:
95 ret = pmic_bus_read(AXP_POWER_STATUS, &val);
96 mask = AXP_POWER_STATUS_VBUS_PRESENT;
99 #ifdef CONFIG_AXP221_POWER /* Only available on axp221/axp223 */
100 case SUNXI_GPIO_AXP0_VBUS_ENABLE:
101 ret = pmic_bus_read(AXP221_VBUS_IPSOUT, &val);
102 mask = AXP221_VBUS_IPSOUT_DRIVEBUS;
106 reg = axp_get_gpio_ctrl_reg(pin);
110 ret = pmic_bus_read(AXP_GPIO_STATE, &val);
111 mask = 1 << (pin + AXP_GPIO_STATE_OFFSET);
116 return (val & mask) ? 1 : 0;
119 int axp_gpio_set_value(struct udevice *dev, unsigned pin, int val)
124 #ifdef CONFIG_AXP221_POWER /* Only available on axp221/axp223 */
125 case SUNXI_GPIO_AXP0_VBUS_ENABLE:
127 return pmic_bus_setbits(AXP221_VBUS_IPSOUT,
128 AXP221_VBUS_IPSOUT_DRIVEBUS);
130 return pmic_bus_clrbits(AXP221_VBUS_IPSOUT,
131 AXP221_VBUS_IPSOUT_DRIVEBUS);
134 reg = axp_get_gpio_ctrl_reg(pin);
138 return pmic_bus_write(reg, val ? AXP_GPIO_CTRL_OUTPUT_HIGH :
139 AXP_GPIO_CTRL_OUTPUT_LOW);
143 #ifdef CONFIG_DM_GPIO
144 static const struct dm_gpio_ops gpio_axp_ops = {
145 .direction_input = axp_gpio_direction_input,
146 .direction_output = axp_gpio_direction_output,
147 .get_value = axp_gpio_get_value,
148 .set_value = axp_gpio_set_value,
151 static int gpio_axp_probe(struct udevice *dev)
153 struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
155 /* Tell the uclass how many GPIOs we have */
156 uc_priv->bank_name = strdup(SUNXI_GPIO_AXP0_PREFIX);
157 uc_priv->gpio_count = SUNXI_GPIO_AXP0_GPIO_COUNT;
162 U_BOOT_DRIVER(gpio_axp) = {
165 .ops = &gpio_axp_ops,
166 .probe = gpio_axp_probe,
170 int axp_gpio_init(void)
172 __maybe_unused struct udevice *dev;
175 ret = pmic_bus_init();
179 #ifdef CONFIG_DM_GPIO
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);