820 lines
15 KiB
C
820 lines
15 KiB
C
/*
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* Copyright (C) 2012-2015 Samsung Electronics
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*
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* Rajeshwari Shinde <rajeshwari.s@samsung.com>
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* Przemyslaw Marczak <p.marczak@samsung.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <fdtdec.h>
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#include <errno.h>
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#include <dm.h>
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#include <i2c.h>
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#include <power/pmic.h>
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#include <power/regulator.h>
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#include <power/max77686_pmic.h>
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DECLARE_GLOBAL_DATA_PTR;
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#define MODE(_id, _val, _name) { \
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.id = _id, \
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.register_value = _val, \
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.name = _name, \
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}
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/* LDO: 1,3,4,5,9,17,18,19,20,21,22,23,24,26,26,27 */
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static struct dm_regulator_mode max77686_ldo_mode_standby1[] = {
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MODE(OPMODE_OFF, MAX77686_LDO_MODE_OFF, "OFF"),
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MODE(OPMODE_LPM, MAX77686_LDO_MODE_LPM, "LPM"),
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MODE(OPMODE_STANDBY_LPM, MAX77686_LDO_MODE_STANDBY_LPM, "ON/LPM"),
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MODE(OPMODE_ON, MAX77686_LDO_MODE_ON, "ON"),
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};
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/* LDO: 2,6,7,8,10,11,12,14,15,16 */
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static struct dm_regulator_mode max77686_ldo_mode_standby2[] = {
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MODE(OPMODE_OFF, MAX77686_LDO_MODE_OFF, "OFF"),
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MODE(OPMODE_STANDBY, MAX77686_LDO_MODE_STANDBY, "ON/OFF"),
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MODE(OPMODE_STANDBY_LPM, MAX77686_LDO_MODE_STANDBY_LPM, "ON/LPM"),
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MODE(OPMODE_ON, MAX77686_LDO_MODE_ON, "ON"),
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};
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/* Buck: 1 */
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static struct dm_regulator_mode max77686_buck_mode_standby[] = {
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MODE(OPMODE_OFF, MAX77686_BUCK_MODE_OFF, "OFF"),
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MODE(OPMODE_STANDBY, MAX77686_BUCK_MODE_STANDBY, "ON/OFF"),
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MODE(OPMODE_ON, MAX77686_BUCK_MODE_ON, "ON"),
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};
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/* Buck: 2,3,4 */
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static struct dm_regulator_mode max77686_buck_mode_lpm[] = {
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MODE(OPMODE_OFF, MAX77686_BUCK_MODE_OFF, "OFF"),
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MODE(OPMODE_STANDBY, MAX77686_BUCK_MODE_STANDBY, "ON/OFF"),
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MODE(OPMODE_LPM, MAX77686_BUCK_MODE_LPM, "LPM"),
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MODE(OPMODE_ON, MAX77686_BUCK_MODE_ON, "ON"),
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};
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/* Buck: 5,6,7,8,9 */
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static struct dm_regulator_mode max77686_buck_mode_onoff[] = {
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MODE(OPMODE_OFF, MAX77686_BUCK_MODE_OFF, "OFF"),
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MODE(OPMODE_ON, MAX77686_BUCK_MODE_ON, "ON"),
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};
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static const char max77686_buck_ctrl[] = {
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0xff, 0x10, 0x12, 0x1c, 0x26, 0x30, 0x32, 0x34, 0x36, 0x38
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};
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static const char max77686_buck_out[] = {
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0xff, 0x11, 0x14, 0x1e, 0x28, 0x31, 0x33, 0x35, 0x37, 0x39
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};
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static int max77686_buck_volt2hex(int buck, int uV)
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{
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unsigned int hex = 0;
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unsigned int hex_max = 0;
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switch (buck) {
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case 2:
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case 3:
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case 4:
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/* hex = (uV - 600000) / 12500; */
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hex = (uV - MAX77686_BUCK_UV_LMIN) / MAX77686_BUCK_UV_LSTEP;
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hex_max = MAX77686_BUCK234_VOLT_MAX_HEX;
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break;
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default:
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/*
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* hex = (uV - 750000) / 50000. We assume that dynamic voltage
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* scaling via GPIOs is not enabled and don't support that.
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* If this is enabled then the driver will need to take that
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* into account and check different registers depending on
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* the current setting. See the datasheet for details.
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*/
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hex = (uV - MAX77686_BUCK_UV_HMIN) / MAX77686_BUCK_UV_HSTEP;
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hex_max = MAX77686_BUCK_VOLT_MAX_HEX;
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break;
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}
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if (hex >= 0 && hex <= hex_max)
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return hex;
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error("Value: %d uV is wrong for BUCK%d", uV, buck);
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return -EINVAL;
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}
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static int max77686_buck_hex2volt(int buck, int hex)
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{
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unsigned uV = 0;
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unsigned int hex_max = 0;
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if (hex < 0)
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goto bad_hex;
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switch (buck) {
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case 2:
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case 3:
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case 4:
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hex_max = MAX77686_BUCK234_VOLT_MAX_HEX;
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if (hex > hex_max)
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goto bad_hex;
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/* uV = hex * 12500 + 600000; */
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uV = hex * MAX77686_BUCK_UV_LSTEP + MAX77686_BUCK_UV_LMIN;
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break;
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default:
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hex_max = MAX77686_BUCK_VOLT_MAX_HEX;
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if (hex > hex_max)
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goto bad_hex;
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/* uV = hex * 50000 + 750000; */
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uV = hex * MAX77686_BUCK_UV_HSTEP + MAX77686_BUCK_UV_HMIN;
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break;
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}
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return uV;
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bad_hex:
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error("Value: %#x is wrong for BUCK%d", hex, buck);
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return -EINVAL;
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}
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static int max77686_ldo_volt2hex(int ldo, int uV)
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{
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unsigned int hex = 0;
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switch (ldo) {
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case 1:
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case 2:
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case 6:
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case 7:
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case 8:
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case 15:
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hex = (uV - MAX77686_LDO_UV_MIN) / MAX77686_LDO_UV_LSTEP;
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/* hex = (uV - 800000) / 25000; */
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break;
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default:
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hex = (uV - MAX77686_LDO_UV_MIN) / MAX77686_LDO_UV_HSTEP;
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/* hex = (uV - 800000) / 50000; */
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}
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if (hex >= 0 && hex <= MAX77686_LDO_VOLT_MAX_HEX)
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return hex;
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error("Value: %d uV is wrong for LDO%d", uV, ldo);
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return -EINVAL;
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}
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static int max77686_ldo_hex2volt(int ldo, int hex)
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{
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unsigned int uV = 0;
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if (hex > MAX77686_LDO_VOLT_MAX_HEX)
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goto bad_hex;
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switch (ldo) {
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case 1:
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case 2:
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case 6:
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case 7:
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case 8:
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case 15:
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/* uV = hex * 25000 + 800000; */
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uV = hex * MAX77686_LDO_UV_LSTEP + MAX77686_LDO_UV_MIN;
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break;
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default:
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/* uV = hex * 50000 + 800000; */
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uV = hex * MAX77686_LDO_UV_HSTEP + MAX77686_LDO_UV_MIN;
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}
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return uV;
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bad_hex:
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error("Value: %#x is wrong for ldo%d", hex, ldo);
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return -EINVAL;
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}
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static int max77686_ldo_hex2mode(int ldo, int hex)
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{
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if (hex > MAX77686_LDO_MODE_MASK)
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return -EINVAL;
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switch (hex) {
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case MAX77686_LDO_MODE_OFF:
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return OPMODE_OFF;
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case MAX77686_LDO_MODE_LPM: /* == MAX77686_LDO_MODE_STANDBY: */
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/* The same mode values but different meaning for each ldo */
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switch (ldo) {
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case 2:
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case 6:
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case 7:
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case 8:
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case 10:
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case 11:
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case 12:
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case 14:
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case 15:
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case 16:
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return OPMODE_STANDBY;
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default:
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return OPMODE_LPM;
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}
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case MAX77686_LDO_MODE_STANDBY_LPM:
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return OPMODE_STANDBY_LPM;
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case MAX77686_LDO_MODE_ON:
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return OPMODE_ON;
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default:
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return -EINVAL;
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}
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}
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static int max77686_buck_hex2mode(int buck, int hex)
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{
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if (hex > MAX77686_BUCK_MODE_MASK)
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return -EINVAL;
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switch (hex) {
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case MAX77686_BUCK_MODE_OFF:
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return OPMODE_OFF;
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case MAX77686_BUCK_MODE_ON:
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return OPMODE_ON;
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case MAX77686_BUCK_MODE_STANDBY:
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switch (buck) {
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case 1:
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case 2:
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case 3:
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case 4:
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return OPMODE_STANDBY;
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default:
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return -EINVAL;
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}
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case MAX77686_BUCK_MODE_LPM:
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switch (buck) {
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case 2:
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case 3:
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case 4:
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return OPMODE_LPM;
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default:
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return -EINVAL;
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}
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default:
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return -EINVAL;
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}
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}
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static int max77686_buck_modes(int buck, struct dm_regulator_mode **modesp)
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{
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int ret = -EINVAL;
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if (buck < 1 || buck > MAX77686_BUCK_NUM)
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return ret;
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switch (buck) {
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case 1:
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*modesp = max77686_buck_mode_standby;
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ret = ARRAY_SIZE(max77686_buck_mode_standby);
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break;
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case 2:
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case 3:
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case 4:
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*modesp = max77686_buck_mode_lpm;
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ret = ARRAY_SIZE(max77686_buck_mode_lpm);
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break;
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default:
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*modesp = max77686_buck_mode_onoff;
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ret = ARRAY_SIZE(max77686_buck_mode_onoff);
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}
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return ret;
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}
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static int max77686_ldo_modes(int ldo, struct dm_regulator_mode **modesp,
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struct udevice *dev)
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{
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int ret = -EINVAL;
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if (ldo < 1 || ldo > MAX77686_LDO_NUM)
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return ret;
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switch (ldo) {
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case 2:
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case 6:
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case 7:
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case 8:
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case 10:
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case 11:
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case 12:
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case 14:
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case 15:
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case 16:
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*modesp = max77686_ldo_mode_standby2;
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ret = ARRAY_SIZE(max77686_ldo_mode_standby2);
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break;
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default:
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*modesp = max77686_ldo_mode_standby1;
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ret = ARRAY_SIZE(max77686_ldo_mode_standby1);
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}
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return ret;
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}
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static int max77686_ldo_val(struct udevice *dev, int op, int *uV)
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{
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unsigned int hex, adr;
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unsigned char val;
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int ldo, ret;
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if (op == PMIC_OP_GET)
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*uV = 0;
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ldo = dev->driver_data;
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if (ldo < 1 || ldo > MAX77686_LDO_NUM) {
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error("Wrong ldo number: %d", ldo);
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return -EINVAL;
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}
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adr = MAX77686_REG_PMIC_LDO1CTRL1 + ldo - 1;
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ret = pmic_read(dev->parent, adr, &val, 1);
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if (ret)
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return ret;
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if (op == PMIC_OP_GET) {
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val &= MAX77686_LDO_VOLT_MASK;
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ret = max77686_ldo_hex2volt(ldo, val);
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if (ret < 0)
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return ret;
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*uV = ret;
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return 0;
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}
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hex = max77686_ldo_volt2hex(ldo, *uV);
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if (hex < 0)
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return hex;
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val &= ~MAX77686_LDO_VOLT_MASK;
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val |= hex;
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ret = pmic_write(dev->parent, adr, &val, 1);
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return ret;
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}
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static int max77686_buck_val(struct udevice *dev, int op, int *uV)
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{
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unsigned int hex, mask, adr;
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unsigned char val;
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int buck, ret;
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buck = dev->driver_data;
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if (buck < 1 || buck > MAX77686_BUCK_NUM) {
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error("Wrong buck number: %d", buck);
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return -EINVAL;
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}
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if (op == PMIC_OP_GET)
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*uV = 0;
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/* &buck_out = ctrl + 1 */
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adr = max77686_buck_out[buck];
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/* mask */
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switch (buck) {
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case 2:
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case 3:
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case 4:
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mask = MAX77686_BUCK234_VOLT_MASK;
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break;
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default:
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mask = MAX77686_BUCK_VOLT_MASK;
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break;
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}
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ret = pmic_read(dev->parent, adr, &val, 1);
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if (ret)
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return ret;
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if (op == PMIC_OP_GET) {
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val &= mask;
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ret = max77686_buck_hex2volt(buck, val);
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if (ret < 0)
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return ret;
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*uV = ret;
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return 0;
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}
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hex = max77686_buck_volt2hex(buck, *uV);
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if (hex < 0)
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return hex;
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val &= ~mask;
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val |= hex;
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ret = pmic_write(dev->parent, adr, &val, 1);
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return ret;
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}
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static int max77686_ldo_mode(struct udevice *dev, int op, int *opmode)
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{
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unsigned int adr, mode;
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unsigned char val;
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int ldo, ret;
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if (op == PMIC_OP_GET)
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*opmode = -EINVAL;
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ldo = dev->driver_data;
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if (ldo < 1 || ldo > MAX77686_LDO_NUM) {
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error("Wrong ldo number: %d", ldo);
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return -EINVAL;
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}
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adr = MAX77686_REG_PMIC_LDO1CTRL1 + ldo - 1;
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ret = pmic_read(dev->parent, adr, &val, 1);
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if (ret)
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return ret;
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if (op == PMIC_OP_GET) {
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val &= MAX77686_LDO_MODE_MASK;
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ret = max77686_ldo_hex2mode(ldo, val);
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if (ret < 0)
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return ret;
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*opmode = ret;
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return 0;
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}
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/* mode */
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switch (*opmode) {
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case OPMODE_OFF:
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mode = MAX77686_LDO_MODE_OFF;
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break;
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case OPMODE_LPM:
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switch (ldo) {
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case 2:
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case 6:
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case 7:
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case 8:
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case 10:
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case 11:
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case 12:
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case 14:
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case 15:
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case 16:
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return -EINVAL;
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default:
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mode = MAX77686_LDO_MODE_LPM;
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}
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break;
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case OPMODE_STANDBY:
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switch (ldo) {
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case 2:
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case 6:
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case 7:
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case 8:
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case 10:
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case 11:
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case 12:
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case 14:
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case 15:
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case 16:
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mode = MAX77686_LDO_MODE_STANDBY;
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break;
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default:
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return -EINVAL;
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}
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break;
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case OPMODE_STANDBY_LPM:
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mode = MAX77686_LDO_MODE_STANDBY_LPM;
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break;
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case OPMODE_ON:
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mode = MAX77686_LDO_MODE_ON;
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break;
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default:
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mode = 0xff;
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}
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if (mode == 0xff) {
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error("Wrong mode: %d for ldo%d", *opmode, ldo);
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return -EINVAL;
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}
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val &= ~MAX77686_LDO_MODE_MASK;
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val |= mode;
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ret = pmic_write(dev->parent, adr, &val, 1);
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return ret;
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}
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static int max77686_ldo_enable(struct udevice *dev, int op, bool *enable)
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{
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int ret, on_off;
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if (op == PMIC_OP_GET) {
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ret = max77686_ldo_mode(dev, op, &on_off);
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if (ret)
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return ret;
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switch (on_off) {
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case OPMODE_OFF:
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*enable = false;
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break;
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case OPMODE_ON:
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*enable = true;
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break;
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default:
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return -EINVAL;
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}
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} else if (op == PMIC_OP_SET) {
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if (*enable)
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on_off = OPMODE_ON;
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else
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on_off = OPMODE_OFF;
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ret = max77686_ldo_mode(dev, op, &on_off);
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if (ret)
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return ret;
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}
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return 0;
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}
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static int max77686_buck_mode(struct udevice *dev, int op, int *opmode)
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{
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unsigned int mask, adr, mode, mode_shift;
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unsigned char val;
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int buck, ret;
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buck = dev->driver_data;
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if (buck < 1 || buck > MAX77686_BUCK_NUM) {
|
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error("Wrong buck number: %d", buck);
|
|
return -EINVAL;
|
|
}
|
|
|
|
adr = max77686_buck_ctrl[buck];
|
|
|
|
/* mask */
|
|
switch (buck) {
|
|
case 2:
|
|
case 3:
|
|
case 4:
|
|
mode_shift = MAX77686_BUCK_MODE_SHIFT_2;
|
|
break;
|
|
default:
|
|
mode_shift = MAX77686_BUCK_MODE_SHIFT_1;
|
|
}
|
|
|
|
mask = MAX77686_BUCK_MODE_MASK << mode_shift;
|
|
|
|
ret = pmic_read(dev->parent, adr, &val, 1);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (op == PMIC_OP_GET) {
|
|
val &= mask;
|
|
val >>= mode_shift;
|
|
ret = max77686_buck_hex2mode(buck, val);
|
|
if (ret < 0)
|
|
return ret;
|
|
*opmode = ret;
|
|
return 0;
|
|
}
|
|
|
|
/* mode */
|
|
switch (*opmode) {
|
|
case OPMODE_OFF:
|
|
mode = MAX77686_BUCK_MODE_OFF;
|
|
break;
|
|
case OPMODE_STANDBY:
|
|
switch (buck) {
|
|
case 1:
|
|
case 2:
|
|
case 3:
|
|
case 4:
|
|
mode = MAX77686_BUCK_MODE_STANDBY << mode_shift;
|
|
break;
|
|
default:
|
|
mode = 0xff;
|
|
}
|
|
break;
|
|
case OPMODE_LPM:
|
|
switch (buck) {
|
|
case 2:
|
|
case 3:
|
|
case 4:
|
|
mode = MAX77686_BUCK_MODE_LPM << mode_shift;
|
|
break;
|
|
default:
|
|
mode = 0xff;
|
|
}
|
|
break;
|
|
case OPMODE_ON:
|
|
mode = MAX77686_BUCK_MODE_ON << mode_shift;
|
|
break;
|
|
default:
|
|
mode = 0xff;
|
|
}
|
|
|
|
if (mode == 0xff) {
|
|
error("Wrong mode: %d for buck: %d\n", *opmode, buck);
|
|
return -EINVAL;
|
|
}
|
|
|
|
val &= ~mask;
|
|
val |= mode;
|
|
ret = pmic_write(dev->parent, adr, &val, 1);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int max77686_buck_enable(struct udevice *dev, int op, bool *enable)
|
|
{
|
|
int ret, on_off;
|
|
|
|
if (op == PMIC_OP_GET) {
|
|
ret = max77686_buck_mode(dev, op, &on_off);
|
|
if (ret)
|
|
return ret;
|
|
|
|
switch (on_off) {
|
|
case OPMODE_OFF:
|
|
*enable = false;
|
|
break;
|
|
case OPMODE_ON:
|
|
*enable = true;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
} else if (op == PMIC_OP_SET) {
|
|
if (*enable)
|
|
on_off = OPMODE_ON;
|
|
else
|
|
on_off = OPMODE_OFF;
|
|
|
|
ret = max77686_buck_mode(dev, op, &on_off);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int max77686_ldo_probe(struct udevice *dev)
|
|
{
|
|
struct dm_regulator_uclass_platdata *uc_pdata;
|
|
|
|
uc_pdata = dev_get_uclass_platdata(dev);
|
|
|
|
uc_pdata->type = REGULATOR_TYPE_LDO;
|
|
uc_pdata->mode_count = max77686_ldo_modes(dev->driver_data,
|
|
&uc_pdata->mode, dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ldo_get_value(struct udevice *dev)
|
|
{
|
|
int uV;
|
|
int ret;
|
|
|
|
ret = max77686_ldo_val(dev, PMIC_OP_GET, &uV);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return uV;
|
|
}
|
|
|
|
static int ldo_set_value(struct udevice *dev, int uV)
|
|
{
|
|
return max77686_ldo_val(dev, PMIC_OP_SET, &uV);
|
|
}
|
|
|
|
static bool ldo_get_enable(struct udevice *dev)
|
|
{
|
|
bool enable = false;
|
|
int ret;
|
|
|
|
ret = max77686_ldo_enable(dev, PMIC_OP_GET, &enable);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return enable;
|
|
}
|
|
|
|
static int ldo_set_enable(struct udevice *dev, bool enable)
|
|
{
|
|
return max77686_ldo_enable(dev, PMIC_OP_SET, &enable);
|
|
}
|
|
|
|
static int ldo_get_mode(struct udevice *dev)
|
|
{
|
|
int mode;
|
|
int ret;
|
|
|
|
ret = max77686_ldo_mode(dev, PMIC_OP_GET, &mode);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return mode;
|
|
}
|
|
|
|
static int ldo_set_mode(struct udevice *dev, int mode)
|
|
{
|
|
return max77686_ldo_mode(dev, PMIC_OP_SET, &mode);
|
|
}
|
|
|
|
static int max77686_buck_probe(struct udevice *dev)
|
|
{
|
|
struct dm_regulator_uclass_platdata *uc_pdata;
|
|
|
|
uc_pdata = dev_get_uclass_platdata(dev);
|
|
|
|
uc_pdata->type = REGULATOR_TYPE_BUCK;
|
|
uc_pdata->mode_count = max77686_buck_modes(dev->driver_data,
|
|
&uc_pdata->mode);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int buck_get_value(struct udevice *dev)
|
|
{
|
|
int uV;
|
|
int ret;
|
|
|
|
ret = max77686_buck_val(dev, PMIC_OP_GET, &uV);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return uV;
|
|
}
|
|
|
|
static int buck_set_value(struct udevice *dev, int uV)
|
|
{
|
|
return max77686_buck_val(dev, PMIC_OP_SET, &uV);
|
|
}
|
|
|
|
static bool buck_get_enable(struct udevice *dev)
|
|
{
|
|
bool enable = false;
|
|
int ret;
|
|
|
|
ret = max77686_buck_enable(dev, PMIC_OP_GET, &enable);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return enable;
|
|
}
|
|
|
|
static int buck_set_enable(struct udevice *dev, bool enable)
|
|
{
|
|
return max77686_buck_enable(dev, PMIC_OP_SET, &enable);
|
|
}
|
|
|
|
static int buck_get_mode(struct udevice *dev)
|
|
{
|
|
int mode;
|
|
int ret;
|
|
|
|
ret = max77686_buck_mode(dev, PMIC_OP_GET, &mode);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return mode;
|
|
}
|
|
|
|
static int buck_set_mode(struct udevice *dev, int mode)
|
|
{
|
|
return max77686_buck_mode(dev, PMIC_OP_SET, &mode);
|
|
}
|
|
|
|
static const struct dm_regulator_ops max77686_ldo_ops = {
|
|
.get_value = ldo_get_value,
|
|
.set_value = ldo_set_value,
|
|
.get_enable = ldo_get_enable,
|
|
.set_enable = ldo_set_enable,
|
|
.get_mode = ldo_get_mode,
|
|
.set_mode = ldo_set_mode,
|
|
};
|
|
|
|
U_BOOT_DRIVER(max77686_ldo) = {
|
|
.name = MAX77686_LDO_DRIVER,
|
|
.id = UCLASS_REGULATOR,
|
|
.ops = &max77686_ldo_ops,
|
|
.probe = max77686_ldo_probe,
|
|
};
|
|
|
|
static const struct dm_regulator_ops max77686_buck_ops = {
|
|
.get_value = buck_get_value,
|
|
.set_value = buck_set_value,
|
|
.get_enable = buck_get_enable,
|
|
.set_enable = buck_set_enable,
|
|
.get_mode = buck_get_mode,
|
|
.set_mode = buck_set_mode,
|
|
};
|
|
|
|
U_BOOT_DRIVER(max77686_buck) = {
|
|
.name = MAX77686_BUCK_DRIVER,
|
|
.id = UCLASS_REGULATOR,
|
|
.ops = &max77686_buck_ops,
|
|
.probe = max77686_buck_probe,
|
|
};
|