1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2012 Samsung Electronics
4 * Rajeshwari Shinde <rajeshwari.s@samsung.com>
10 #include <power/pmic.h>
11 #include <power/max77686_pmic.h>
14 DECLARE_GLOBAL_DATA_PTR;
16 static const char max77686_buck_addr[] = {
17 0xff, 0x10, 0x12, 0x1c, 0x26, 0x30, 0x32, 0x34, 0x36, 0x38
20 static unsigned int max77686_ldo_volt2hex(int ldo, ulong uV)
31 hex = (uV - 800000) / 25000;
34 hex = (uV - 800000) / 50000;
37 if (hex >= 0 && hex <= MAX77686_LDO_VOLT_MAX_HEX)
40 debug("%s: %ld is wrong voltage value for LDO%d\n", __func__, uV, ldo);
44 static int max77686_buck_volt2hex(int buck, ulong uV)
48 if (buck < 5 || buck > 9) {
49 debug("%s: buck %d is not supported\n", __func__, buck);
53 hex = (uV - 750000) / 50000;
55 if (hex >= 0 && hex <= MAX77686_BUCK_VOLT_MAX_HEX)
58 debug("%s: %ld is wrong voltage value for BUCK%d\n",
63 int max77686_set_ldo_voltage(struct pmic *p, int ldo, ulong uV)
65 unsigned int val, ret, hex, adr;
67 if (ldo < 1 || ldo > 26) {
68 printf("%s: %d is wrong ldo number\n", __func__, ldo);
72 adr = MAX77686_REG_PMIC_LDO1CTRL1 + ldo - 1;
73 hex = max77686_ldo_volt2hex(ldo, uV);
78 ret = pmic_reg_read(p, adr, &val);
82 val &= ~MAX77686_LDO_VOLT_MASK;
84 ret |= pmic_reg_write(p, adr, val);
89 int max77686_set_buck_voltage(struct pmic *p, int buck, ulong uV)
91 unsigned int val, adr;
94 if (buck < 5 || buck > 9) {
95 printf("%s: %d is an unsupported bucket number\n",
100 adr = max77686_buck_addr[buck] + 1;
101 hex = max77686_buck_volt2hex(buck, uV);
106 ret = pmic_reg_read(p, adr, &val);
110 val &= ~MAX77686_BUCK_VOLT_MASK;
111 ret |= pmic_reg_write(p, adr, val | hex);
116 int max77686_set_ldo_mode(struct pmic *p, int ldo, char opmode)
118 unsigned int val, ret, adr, mode;
120 if (ldo < 1 || 26 < ldo) {
121 printf("%s: %d is wrong ldo number\n", __func__, ldo);
125 adr = MAX77686_REG_PMIC_LDO1CTRL1 + ldo - 1;
130 mode = MAX77686_LDO_MODE_OFF;
144 mode = MAX77686_LDO_MODE_STANDBY;
151 mode = MAX77686_LDO_MODE_LPM;
154 mode = MAX77686_LDO_MODE_ON;
161 printf("%s: %d is not supported on LDO%d\n",
162 __func__, opmode, ldo);
166 ret = pmic_reg_read(p, adr, &val);
170 val &= ~MAX77686_LDO_MODE_MASK;
172 ret |= pmic_reg_write(p, adr, val);
177 int max77686_set_buck_mode(struct pmic *p, int buck, char opmode)
179 unsigned int val, ret, mask, adr, size, mode, mode_shift;
181 size = ARRAY_SIZE(max77686_buck_addr);
183 printf("%s: %d is wrong buck number\n", __func__, buck);
187 adr = max77686_buck_addr[buck];
194 mode_shift = MAX77686_BUCK_MODE_SHIFT_2;
197 mode_shift = MAX77686_BUCK_MODE_SHIFT_1;
200 mask = MAX77686_BUCK_MODE_MASK << mode_shift;
205 mode = MAX77686_BUCK_MODE_OFF << mode_shift;
213 mode = MAX77686_BUCK_MODE_STANDBY << mode_shift;
224 mode = MAX77686_BUCK_MODE_LPM << mode_shift;
231 mode = MAX77686_BUCK_MODE_ON << mode_shift;
238 printf("%s: %d is not supported on BUCK%d\n",
239 __func__, opmode, buck);
243 ret = pmic_reg_read(p, adr, &val);
249 ret |= pmic_reg_write(p, adr, val);
254 int pmic_init(unsigned char bus)
256 static const char name[] = "MAX77686_PMIC";
257 struct pmic *p = pmic_alloc();
258 #if CONFIG_IS_ENABLED(OF_CONTROL)
259 const void *blob = gd->fdt_blob;
260 int node, parent, tmp;
264 printf("%s: POWER allocation error!\n", __func__);
268 #if CONFIG_IS_ENABLED(OF_CONTROL)
269 node = fdtdec_next_compatible(blob, 0, COMPAT_MAXIM_MAX77686_PMIC);
271 debug("PMIC: No node for PMIC Chip in device tree\n");
272 debug("node = %d\n", node);
276 parent = fdt_parent_offset(blob, node);
278 debug("%s: Cannot find node parent\n", __func__);
282 /* tmp since p->bus is unsigned */
283 tmp = i2c_get_bus_num_fdt(parent);
285 debug("%s: Cannot find I2C bus\n", __func__);
289 p->hw.i2c.addr = fdtdec_get_int(blob, node, "reg", 9);
292 p->hw.i2c.addr = MAX77686_I2C_ADDR;
296 p->interface = PMIC_I2C;
297 p->number_of_regs = MAX77686_NUM_OF_REGS;
298 p->hw.i2c.tx_num = 1;
300 puts("Board PMIC init\n");