3 * Henrik Nordstrom <henrik@henriknordstrom.net>
5 * SPDX-License-Identifier: GPL-2.0+
13 AXP209_POWER_STATUS = 0x00,
14 AXP209_CHIP_VERSION = 0x03,
15 AXP209_DCDC2_VOLTAGE = 0x23,
16 AXP209_DCDC3_VOLTAGE = 0x27,
17 AXP209_LDO24_VOLTAGE = 0x28,
18 AXP209_LDO3_VOLTAGE = 0x29,
19 AXP209_IRQ_STATUS5 = 0x4c,
20 AXP209_SHUTDOWN = 0x32,
21 AXP209_GPIO0_CTRL = 0x90,
22 AXP209_GPIO1_CTRL = 0x92,
23 AXP209_GPIO2_CTRL = 0x93,
24 AXP209_GPIO_STATE = 0x94,
25 AXP209_GPIO3_CTRL = 0x95,
28 #define AXP209_POWER_STATUS_ON_BY_DC (1 << 0)
30 #define AXP209_IRQ5_PEK_UP (1 << 6)
31 #define AXP209_IRQ5_PEK_DOWN (1 << 5)
33 #define AXP209_POWEROFF (1 << 7)
35 #define AXP209_GPIO_OUTPUT_LOW 0x00 /* Drive pin low */
36 #define AXP209_GPIO_OUTPUT_HIGH 0x01 /* Drive pin high */
37 #define AXP209_GPIO_INPUT 0x02 /* Float pin */
39 /* GPIO3 is different from the others */
40 #define AXP209_GPIO3_OUTPUT_LOW 0x00 /* Drive pin low, Output mode */
41 #define AXP209_GPIO3_OUTPUT_HIGH 0x02 /* Float pin, Output mode */
42 #define AXP209_GPIO3_INPUT 0x06 /* Float pin, Input mode */
44 static int axp209_write(enum axp209_reg reg, u8 val)
46 return i2c_write(0x34, reg, 1, &val, 1);
49 static int axp209_read(enum axp209_reg reg, u8 *val)
51 return i2c_read(0x34, reg, 1, val, 1);
54 static u8 axp209_mvolt_to_cfg(int mvolt, int min, int max, int div)
61 return (mvolt - min) / div;
64 int axp209_set_dcdc2(int mvolt)
69 cfg = axp209_mvolt_to_cfg(mvolt, 700, 2275, 25);
71 /* Do we really need to be this gentle? It has built-in voltage slope */
72 while ((rc = axp209_read(AXP209_DCDC2_VOLTAGE, ¤t)) == 0 &&
79 rc = axp209_write(AXP209_DCDC2_VOLTAGE, current);
87 int axp209_set_dcdc3(int mvolt)
89 u8 cfg = axp209_mvolt_to_cfg(mvolt, 700, 3500, 25);
91 return axp209_write(AXP209_DCDC3_VOLTAGE, cfg);
94 int axp209_set_ldo2(int mvolt)
99 cfg = axp209_mvolt_to_cfg(mvolt, 1800, 3300, 100);
101 rc = axp209_read(AXP209_LDO24_VOLTAGE, ®);
105 /* LDO2 configuration is in upper 4 bits */
106 reg = (reg & 0x0f) | (cfg << 4);
107 return axp209_write(AXP209_LDO24_VOLTAGE, reg);
110 int axp209_set_ldo3(int mvolt)
115 cfg = 0x80; /* determined by LDO3IN pin */
117 cfg = axp209_mvolt_to_cfg(mvolt, 700, 2275, 25);
119 return axp209_write(AXP209_LDO3_VOLTAGE, cfg);
122 int axp209_set_ldo4(int mvolt)
125 static const int vindex[] = {
126 1250, 1300, 1400, 1500, 1600, 1700, 1800, 1900, 2000, 2500,
127 2700, 2800, 3000, 3100, 3200, 3300
131 /* Translate mvolt to register cfg value, requested <= selected */
132 for (cfg = 15; vindex[cfg] > mvolt && cfg > 0; cfg--);
134 rc = axp209_read(AXP209_LDO24_VOLTAGE, ®);
138 /* LDO4 configuration is in lower 4 bits */
139 reg = (reg & 0xf0) | (cfg << 0);
140 return axp209_write(AXP209_LDO24_VOLTAGE, reg);
143 int axp209_init(void)
148 rc = axp209_read(AXP209_CHIP_VERSION, &ver);
152 /* Low 4 bits is chip version */
161 int axp209_poweron_by_dc(void)
165 if (axp209_read(AXP209_POWER_STATUS, &v))
168 return (v & AXP209_POWER_STATUS_ON_BY_DC);
171 int axp209_power_button(void)
175 if (axp209_read(AXP209_IRQ_STATUS5, &v))
178 axp209_write(AXP209_IRQ_STATUS5, AXP209_IRQ5_PEK_DOWN);
180 return v & AXP209_IRQ5_PEK_DOWN;
183 static u8 axp209_get_gpio_ctrl_reg(unsigned int pin)
186 case 0: return AXP209_GPIO0_CTRL;
187 case 1: return AXP209_GPIO1_CTRL;
188 case 2: return AXP209_GPIO2_CTRL;
189 case 3: return AXP209_GPIO3_CTRL;
194 int axp_gpio_direction_input(unsigned int pin)
196 u8 reg = axp209_get_gpio_ctrl_reg(pin);
197 /* GPIO3 is "special" */
198 u8 val = (pin == 3) ? AXP209_GPIO3_INPUT : AXP209_GPIO_INPUT;
200 return axp209_write(reg, val);
203 int axp_gpio_direction_output(unsigned int pin, unsigned int val)
205 u8 reg = axp209_get_gpio_ctrl_reg(pin);
208 val = (pin == 3) ? AXP209_GPIO3_OUTPUT_HIGH :
209 AXP209_GPIO_OUTPUT_HIGH;
211 val = (pin == 3) ? AXP209_GPIO3_OUTPUT_LOW :
212 AXP209_GPIO_OUTPUT_LOW;
215 return axp209_write(reg, val);
218 int axp_gpio_get_value(unsigned int pin)
224 rc = axp209_read(AXP209_GPIO3_CTRL, &val);
227 rc = axp209_read(AXP209_GPIO_STATE, &val);
228 mask = 1 << (pin + 4);
233 return (val & mask) ? 1 : 0;
236 int axp_gpio_set_value(unsigned int pin, unsigned int val)
238 return axp_gpio_direction_output(pin, val);