3 * Henrik Nordstrom <henrik@henriknordstrom.net>
5 * SPDX-License-Identifier: GPL-2.0+
10 #include <asm/arch/gpio.h>
14 AXP209_POWER_STATUS = 0x00,
15 AXP209_CHIP_VERSION = 0x03,
16 AXP209_DCDC2_VOLTAGE = 0x23,
17 AXP209_DCDC3_VOLTAGE = 0x27,
18 AXP209_LDO24_VOLTAGE = 0x28,
19 AXP209_LDO3_VOLTAGE = 0x29,
20 AXP209_IRQ_ENABLE1 = 0x40,
21 AXP209_IRQ_ENABLE2 = 0x41,
22 AXP209_IRQ_ENABLE3 = 0x42,
23 AXP209_IRQ_ENABLE4 = 0x43,
24 AXP209_IRQ_ENABLE5 = 0x44,
25 AXP209_IRQ_STATUS5 = 0x4c,
26 AXP209_SHUTDOWN = 0x32,
27 AXP209_GPIO0_CTRL = 0x90,
28 AXP209_GPIO1_CTRL = 0x92,
29 AXP209_GPIO2_CTRL = 0x93,
30 AXP209_GPIO_STATE = 0x94,
31 AXP209_GPIO3_CTRL = 0x95,
34 #define AXP209_POWER_STATUS_ON_BY_DC (1 << 0)
35 #define AXP209_POWER_STATUS_VBUS_USABLE (1 << 4)
37 #define AXP209_IRQ5_PEK_UP (1 << 6)
38 #define AXP209_IRQ5_PEK_DOWN (1 << 5)
40 #define AXP209_POWEROFF (1 << 7)
42 #define AXP209_GPIO_OUTPUT_LOW 0x00 /* Drive pin low */
43 #define AXP209_GPIO_OUTPUT_HIGH 0x01 /* Drive pin high */
44 #define AXP209_GPIO_INPUT 0x02 /* Float pin */
46 /* GPIO3 is different from the others */
47 #define AXP209_GPIO3_OUTPUT_LOW 0x00 /* Drive pin low, Output mode */
48 #define AXP209_GPIO3_OUTPUT_HIGH 0x02 /* Float pin, Output mode */
49 #define AXP209_GPIO3_INPUT 0x06 /* Float pin, Input mode */
51 static int axp209_write(enum axp209_reg reg, u8 val)
53 return i2c_write(0x34, reg, 1, &val, 1);
56 static int axp209_read(enum axp209_reg reg, u8 *val)
58 return i2c_read(0x34, reg, 1, val, 1);
61 static u8 axp209_mvolt_to_cfg(int mvolt, int min, int max, int div)
68 return (mvolt - min) / div;
71 int axp209_set_dcdc2(int mvolt)
76 cfg = axp209_mvolt_to_cfg(mvolt, 700, 2275, 25);
78 /* Do we really need to be this gentle? It has built-in voltage slope */
79 while ((rc = axp209_read(AXP209_DCDC2_VOLTAGE, ¤t)) == 0 &&
86 rc = axp209_write(AXP209_DCDC2_VOLTAGE, current);
94 int axp209_set_dcdc3(int mvolt)
96 u8 cfg = axp209_mvolt_to_cfg(mvolt, 700, 3500, 25);
98 return axp209_write(AXP209_DCDC3_VOLTAGE, cfg);
101 int axp209_set_ldo2(int mvolt)
106 cfg = axp209_mvolt_to_cfg(mvolt, 1800, 3300, 100);
108 rc = axp209_read(AXP209_LDO24_VOLTAGE, ®);
112 /* LDO2 configuration is in upper 4 bits */
113 reg = (reg & 0x0f) | (cfg << 4);
114 return axp209_write(AXP209_LDO24_VOLTAGE, reg);
117 int axp209_set_ldo3(int mvolt)
122 cfg = 0x80; /* determined by LDO3IN pin */
124 cfg = axp209_mvolt_to_cfg(mvolt, 700, 3500, 25);
126 return axp209_write(AXP209_LDO3_VOLTAGE, cfg);
129 int axp209_set_ldo4(int mvolt)
132 static const int vindex[] = {
133 1250, 1300, 1400, 1500, 1600, 1700, 1800, 1900, 2000, 2500,
134 2700, 2800, 3000, 3100, 3200, 3300
138 /* Translate mvolt to register cfg value, requested <= selected */
139 for (cfg = 15; vindex[cfg] > mvolt && cfg > 0; cfg--);
141 rc = axp209_read(AXP209_LDO24_VOLTAGE, ®);
145 /* LDO4 configuration is in lower 4 bits */
146 reg = (reg & 0xf0) | (cfg << 0);
147 return axp209_write(AXP209_LDO24_VOLTAGE, reg);
150 int axp209_init(void)
155 rc = axp209_read(AXP209_CHIP_VERSION, &ver);
159 /* Low 4 bits is chip version */
165 /* Mask all interrupts */
166 for (i = AXP209_IRQ_ENABLE1; i <= AXP209_IRQ_ENABLE5; i++) {
167 rc = axp209_write(i, 0);
175 int axp209_poweron_by_dc(void)
179 if (axp209_read(AXP209_POWER_STATUS, &v))
182 return (v & AXP209_POWER_STATUS_ON_BY_DC);
185 int axp209_power_button(void)
189 if (axp209_read(AXP209_IRQ_STATUS5, &v))
192 axp209_write(AXP209_IRQ_STATUS5, AXP209_IRQ5_PEK_DOWN);
194 return v & AXP209_IRQ5_PEK_DOWN;
197 static u8 axp209_get_gpio_ctrl_reg(unsigned int pin)
200 case 0: return AXP209_GPIO0_CTRL;
201 case 1: return AXP209_GPIO1_CTRL;
202 case 2: return AXP209_GPIO2_CTRL;
203 case 3: return AXP209_GPIO3_CTRL;
208 int axp_gpio_direction_input(unsigned int pin)
210 if (pin == SUNXI_GPIO_AXP0_VBUS_DETECT)
213 u8 reg = axp209_get_gpio_ctrl_reg(pin);
214 /* GPIO3 is "special" */
215 u8 val = (pin == 3) ? AXP209_GPIO3_INPUT : AXP209_GPIO_INPUT;
217 return axp209_write(reg, val);
220 int axp_gpio_direction_output(unsigned int pin, unsigned int val)
222 u8 reg = axp209_get_gpio_ctrl_reg(pin);
225 val = (pin == 3) ? AXP209_GPIO3_OUTPUT_HIGH :
226 AXP209_GPIO_OUTPUT_HIGH;
228 val = (pin == 3) ? AXP209_GPIO3_OUTPUT_LOW :
229 AXP209_GPIO_OUTPUT_LOW;
232 return axp209_write(reg, val);
235 int axp_gpio_get_value(unsigned int pin)
240 if (pin == SUNXI_GPIO_AXP0_VBUS_DETECT) {
241 rc = axp209_read(AXP209_POWER_STATUS, &val);
242 mask = AXP209_POWER_STATUS_VBUS_USABLE;
243 } else if (pin == 3) {
244 rc = axp209_read(AXP209_GPIO3_CTRL, &val);
247 rc = axp209_read(AXP209_GPIO_STATE, &val);
248 mask = 1 << (pin + 4);
253 return (val & mask) ? 1 : 0;
256 int axp_gpio_set_value(unsigned int pin, unsigned int val)
258 return axp_gpio_direction_output(pin, val);