3 * Henrik Nordstrom <henrik@henriknordstrom.net>
5 * SPDX-License-Identifier: GPL-2.0+
12 static int axp209_write(enum axp209_reg reg, u8 val)
14 return i2c_write(0x34, reg, 1, &val, 1);
17 static int axp209_read(enum axp209_reg reg, u8 *val)
19 return i2c_read(0x34, reg, 1, val, 1);
22 static u8 axp209_mvolt_to_cfg(int mvolt, int min, int max, int div)
29 return (mvolt - min) / div;
32 int axp_set_dcdc2(unsigned int mvolt)
37 cfg = axp209_mvolt_to_cfg(mvolt, 700, 2275, 25);
39 /* Do we really need to be this gentle? It has built-in voltage slope */
40 while ((rc = axp209_read(AXP209_DCDC2_VOLTAGE, ¤t)) == 0 &&
47 rc = axp209_write(AXP209_DCDC2_VOLTAGE, current);
55 int axp_set_dcdc3(unsigned int mvolt)
57 u8 cfg = axp209_mvolt_to_cfg(mvolt, 700, 3500, 25);
59 return axp209_write(AXP209_DCDC3_VOLTAGE, cfg);
62 int axp_set_aldo2(unsigned int mvolt)
67 cfg = axp209_mvolt_to_cfg(mvolt, 1800, 3300, 100);
69 rc = axp209_read(AXP209_LDO24_VOLTAGE, ®);
73 /* LDO2 configuration is in upper 4 bits */
74 reg = (reg & 0x0f) | (cfg << 4);
75 return axp209_write(AXP209_LDO24_VOLTAGE, reg);
78 int axp_set_aldo3(unsigned int mvolt)
83 cfg = 0x80; /* determined by LDO3IN pin */
85 cfg = axp209_mvolt_to_cfg(mvolt, 700, 3500, 25);
87 return axp209_write(AXP209_LDO3_VOLTAGE, cfg);
90 int axp_set_aldo4(unsigned int mvolt)
93 static const unsigned int vindex[] = {
94 1250, 1300, 1400, 1500, 1600, 1700, 1800, 1900, 2000, 2500,
95 2700, 2800, 3000, 3100, 3200, 3300
99 /* Translate mvolt to register cfg value, requested <= selected */
100 for (cfg = 15; vindex[cfg] > mvolt && cfg > 0; cfg--);
102 rc = axp209_read(AXP209_LDO24_VOLTAGE, ®);
106 /* LDO4 configuration is in lower 4 bits */
107 reg = (reg & 0xf0) | (cfg << 0);
108 return axp209_write(AXP209_LDO24_VOLTAGE, reg);
116 rc = axp209_read(AXP209_CHIP_VERSION, &ver);
120 /* Low 4 bits is chip version */
126 /* Mask all interrupts */
127 for (i = AXP209_IRQ_ENABLE1; i <= AXP209_IRQ_ENABLE5; i++) {
128 rc = axp209_write(i, 0);