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,
23 #define AXP209_POWER_STATUS_ON_BY_DC (1 << 0)
25 #define AXP209_IRQ5_PEK_UP (1 << 6)
26 #define AXP209_IRQ5_PEK_DOWN (1 << 5)
28 #define AXP209_POWEROFF (1 << 7)
30 static int axp209_write(enum axp209_reg reg, u8 val)
32 return i2c_write(0x34, reg, 1, &val, 1);
35 static int axp209_read(enum axp209_reg reg, u8 *val)
37 return i2c_read(0x34, reg, 1, val, 1);
40 static u8 axp209_mvolt_to_cfg(int mvolt, int min, int max, int div)
47 return (mvolt - min) / div;
50 int axp209_set_dcdc2(int mvolt)
55 cfg = axp209_mvolt_to_cfg(mvolt, 700, 2275, 25);
57 /* Do we really need to be this gentle? It has built-in voltage slope */
58 while ((rc = axp209_read(AXP209_DCDC2_VOLTAGE, ¤t)) == 0 &&
65 rc = axp209_write(AXP209_DCDC2_VOLTAGE, current);
73 int axp209_set_dcdc3(int mvolt)
75 u8 cfg = axp209_mvolt_to_cfg(mvolt, 700, 3500, 25);
77 return axp209_write(AXP209_DCDC3_VOLTAGE, cfg);
80 int axp209_set_ldo2(int mvolt)
85 cfg = axp209_mvolt_to_cfg(mvolt, 1800, 3300, 100);
87 rc = axp209_read(AXP209_LDO24_VOLTAGE, ®);
91 /* LDO2 configuration is in upper 4 bits */
92 reg = (reg & 0x0f) | (cfg << 4);
93 return axp209_write(AXP209_LDO24_VOLTAGE, reg);
96 int axp209_set_ldo3(int mvolt)
101 cfg = 0x80; /* determined by LDO3IN pin */
103 cfg = axp209_mvolt_to_cfg(mvolt, 700, 2275, 25);
105 return axp209_write(AXP209_LDO3_VOLTAGE, cfg);
108 int axp209_set_ldo4(int mvolt)
111 static const int vindex[] = {
112 1250, 1300, 1400, 1500, 1600, 1700, 1800, 1900, 2000, 2500,
113 2700, 2800, 3000, 3100, 3200, 3300
117 /* Translate mvolt to register cfg value, requested <= selected */
118 for (cfg = 15; vindex[cfg] > mvolt && cfg > 0; cfg--);
120 rc = axp209_read(AXP209_LDO24_VOLTAGE, ®);
124 /* LDO4 configuration is in lower 4 bits */
125 reg = (reg & 0xf0) | (cfg << 0);
126 return axp209_write(AXP209_LDO24_VOLTAGE, reg);
129 int axp209_init(void)
134 rc = axp209_read(AXP209_CHIP_VERSION, &ver);
138 /* Low 4 bits is chip version */
147 int axp209_poweron_by_dc(void)
151 if (axp209_read(AXP209_POWER_STATUS, &v))
154 return (v & AXP209_POWER_STATUS_ON_BY_DC);
157 int axp209_power_button(void)
161 if (axp209_read(AXP209_IRQ_STATUS5, &v))
164 axp209_write(AXP209_IRQ_STATUS5, AXP209_IRQ5_PEK_DOWN);
166 return v & AXP209_IRQ5_PEK_DOWN;