3 * Henrik Nordstrom <henrik@henriknordstrom.net>
5 * SPDX-License-Identifier: GPL-2.0+
10 #include <asm/arch/gpio.h>
13 static int axp209_write(enum axp209_reg reg
, u8 val
)
15 return i2c_write(0x34, reg
, 1, &val
, 1);
18 static int axp209_read(enum axp209_reg reg
, u8
*val
)
20 return i2c_read(0x34, reg
, 1, val
, 1);
23 static u8
axp209_mvolt_to_cfg(int mvolt
, int min
, int max
, int div
)
30 return (mvolt
- min
) / div
;
33 int axp209_set_dcdc2(int mvolt
)
38 cfg
= axp209_mvolt_to_cfg(mvolt
, 700, 2275, 25);
40 /* Do we really need to be this gentle? It has built-in voltage slope */
41 while ((rc
= axp209_read(AXP209_DCDC2_VOLTAGE
, ¤t
)) == 0 &&
48 rc
= axp209_write(AXP209_DCDC2_VOLTAGE
, current
);
56 int axp209_set_dcdc3(int mvolt
)
58 u8 cfg
= axp209_mvolt_to_cfg(mvolt
, 700, 3500, 25);
60 return axp209_write(AXP209_DCDC3_VOLTAGE
, cfg
);
63 int axp209_set_ldo2(int mvolt
)
68 cfg
= axp209_mvolt_to_cfg(mvolt
, 1800, 3300, 100);
70 rc
= axp209_read(AXP209_LDO24_VOLTAGE
, ®
);
74 /* LDO2 configuration is in upper 4 bits */
75 reg
= (reg
& 0x0f) | (cfg
<< 4);
76 return axp209_write(AXP209_LDO24_VOLTAGE
, reg
);
79 int axp209_set_ldo3(int mvolt
)
84 cfg
= 0x80; /* determined by LDO3IN pin */
86 cfg
= axp209_mvolt_to_cfg(mvolt
, 700, 3500, 25);
88 return axp209_write(AXP209_LDO3_VOLTAGE
, cfg
);
91 int axp209_set_ldo4(int mvolt
)
94 static const int vindex
[] = {
95 1250, 1300, 1400, 1500, 1600, 1700, 1800, 1900, 2000, 2500,
96 2700, 2800, 3000, 3100, 3200, 3300
100 /* Translate mvolt to register cfg value, requested <= selected */
101 for (cfg
= 15; vindex
[cfg
] > mvolt
&& cfg
> 0; cfg
--);
103 rc
= axp209_read(AXP209_LDO24_VOLTAGE
, ®
);
107 /* LDO4 configuration is in lower 4 bits */
108 reg
= (reg
& 0xf0) | (cfg
<< 0);
109 return axp209_write(AXP209_LDO24_VOLTAGE
, reg
);
112 int axp209_init(void)
117 rc
= axp209_read(AXP209_CHIP_VERSION
, &ver
);
121 /* Low 4 bits is chip version */
127 /* Mask all interrupts */
128 for (i
= AXP209_IRQ_ENABLE1
; i
<= AXP209_IRQ_ENABLE5
; i
++) {
129 rc
= axp209_write(i
, 0);
137 int axp209_poweron_by_dc(void)
141 if (axp209_read(AXP209_POWER_STATUS
, &v
))
144 return (v
& AXP209_POWER_STATUS_ON_BY_DC
);
147 int axp209_power_button(void)
151 if (axp209_read(AXP209_IRQ_STATUS5
, &v
))
154 axp209_write(AXP209_IRQ_STATUS5
, AXP209_IRQ5_PEK_DOWN
);
156 return v
& AXP209_IRQ5_PEK_DOWN
;