regulator: add voltage selection capability to mc13783 regulators v2 .
This patch, complete the mc13783 regulator subsystem driver with voltage selecting capability. Main Switches (SW1AB, SW2AB) are not supported yet. version 2 diffs: - delete the "Switchers PLL" enable and multiplication factor value selecting capability because it is not a voltage or current regulator. This will be a part of Main switcher supporting task. - Correct many coding style problems pointed me out. Signed-off-by: Alberto Panizzo <maramaopercheseimorto@gmail.com> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>hifive-unleashed-5.1
Alberto Panizzo
Liam Girdwood
parent
3a5b27bf6f
commit
1bd588fd9d
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@ -2,6 +2,7 @@
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* Regulator Driver for Freescale MC13783 PMIC
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*
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* Copyright (C) 2008 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>
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* Copyright 2009 Alberto Panizzo <maramaopercheseimorto@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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@ -16,11 +17,44 @@
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#include <linux/init.h>
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#include <linux/err.h>
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#define MC13783_REG_SWITCHERS4 28
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#define MC13783_REG_SWITCHERS4_PLLEN (1 << 18)
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#define MC13783_REG_SWITCHERS5 29
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#define MC13783_REG_SWITCHERS5_SW3EN (1 << 20)
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#define MC13783_REG_SWITCHERS5_SW3VSEL 18
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#define MC13783_REG_SWITCHERS5_SW3VSEL_M (3 << 18)
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#define MC13783_REG_REGULATORSETTING0 30
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#define MC13783_REG_REGULATORSETTING0_VIOLOVSEL 2
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#define MC13783_REG_REGULATORSETTING0_VDIGVSEL 4
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#define MC13783_REG_REGULATORSETTING0_VGENVSEL 6
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#define MC13783_REG_REGULATORSETTING0_VRFDIGVSEL 9
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#define MC13783_REG_REGULATORSETTING0_VRFREFVSEL 11
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#define MC13783_REG_REGULATORSETTING0_VRFCPVSEL 13
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#define MC13783_REG_REGULATORSETTING0_VSIMVSEL 14
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#define MC13783_REG_REGULATORSETTING0_VESIMVSEL 15
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#define MC13783_REG_REGULATORSETTING0_VCAMVSEL 16
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#define MC13783_REG_REGULATORSETTING0_VIOLOVSEL_M (3 << 2)
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#define MC13783_REG_REGULATORSETTING0_VDIGVSEL_M (3 << 4)
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#define MC13783_REG_REGULATORSETTING0_VGENVSEL_M (7 << 6)
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#define MC13783_REG_REGULATORSETTING0_VRFDIGVSEL_M (3 << 9)
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#define MC13783_REG_REGULATORSETTING0_VRFREFVSEL_M (3 << 11)
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#define MC13783_REG_REGULATORSETTING0_VRFCPVSEL_M (1 << 13)
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#define MC13783_REG_REGULATORSETTING0_VSIMVSEL_M (1 << 14)
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#define MC13783_REG_REGULATORSETTING0_VESIMVSEL_M (1 << 15)
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#define MC13783_REG_REGULATORSETTING0_VCAMVSEL_M (7 << 16)
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#define MC13783_REG_REGULATORSETTING1 31
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#define MC13783_REG_REGULATORSETTING1_VVIBVSEL 0
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#define MC13783_REG_REGULATORSETTING1_VRF1VSEL 2
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#define MC13783_REG_REGULATORSETTING1_VRF2VSEL 4
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#define MC13783_REG_REGULATORSETTING1_VMMC1VSEL 6
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#define MC13783_REG_REGULATORSETTING1_VMMC2VSEL 9
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#define MC13783_REG_REGULATORSETTING1_VVIBVSEL_M (3 << 0)
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#define MC13783_REG_REGULATORSETTING1_VRF1VSEL_M (3 << 2)
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#define MC13783_REG_REGULATORSETTING1_VRF2VSEL_M (3 << 4)
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#define MC13783_REG_REGULATORSETTING1_VMMC1VSEL_M (7 << 6)
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#define MC13783_REG_REGULATORSETTING1_VMMC2VSEL_M (7 << 9)
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#define MC13783_REG_REGULATORMODE0 32
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#define MC13783_REG_REGULATORMODE0_VAUDIOEN (1 << 0)
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@ -53,11 +87,117 @@ struct mc13783_regulator {
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struct regulator_desc desc;
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int reg;
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int enable_bit;
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int vsel_reg;
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int vsel_shift;
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int vsel_mask;
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int const *voltages;
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};
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/* Voltage Values */
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static const int const mc13783_sw3_val[] = {
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5000000, 5000000, 5000000, 5500000,
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};
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static const int const mc13783_vaudio_val[] = {
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2775000,
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};
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static const int const mc13783_viohi_val[] = {
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2775000,
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};
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static const int const mc13783_violo_val[] = {
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1200000, 1300000, 1500000, 1800000,
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};
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static const int const mc13783_vdig_val[] = {
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1200000, 1300000, 1500000, 1800000,
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};
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static const int const mc13783_vgen_val[] = {
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1200000, 1300000, 1500000, 1800000,
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1100000, 2000000, 2775000, 2400000,
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};
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static const int const mc13783_vrfdig_val[] = {
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1200000, 1500000, 1800000, 1875000,
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};
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static const int const mc13783_vrfref_val[] = {
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2475000, 2600000, 2700000, 2775000,
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};
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static const int const mc13783_vrfcp_val[] = {
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2700000, 2775000,
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};
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static const int const mc13783_vsim_val[] = {
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1800000, 2900000, 3000000,
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};
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static const int const mc13783_vesim_val[] = {
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1800000, 2900000,
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};
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static const int const mc13783_vcam_val[] = {
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1500000, 1800000, 2500000, 2550000,
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2600000, 2750000, 2800000, 3000000,
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};
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static const int const mc13783_vrfbg_val[] = {
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1250000,
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};
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static const int const mc13783_vvib_val[] = {
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1300000, 1800000, 2000000, 3000000,
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};
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static const int const mc13783_vmmc_val[] = {
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1600000, 1800000, 2000000, 2600000,
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2700000, 2800000, 2900000, 3000000,
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};
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static const int const mc13783_vrf_val[] = {
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1500000, 1875000, 2700000, 2775000,
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};
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static struct regulator_ops mc13783_regulator_ops;
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static struct regulator_ops mc13783_fixed_regulator_ops;
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#define MC13783_DEFINE(prefix, _name, _reg) \
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#define MC13783_DEFINE(prefix, _name, _reg, _vsel_reg, _voltages) \
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[MC13783_ ## prefix ## _ ## _name] = { \
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.desc = { \
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.name = #prefix "_" #_name, \
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.n_voltages = ARRAY_SIZE(_voltages), \
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.ops = &mc13783_regulator_ops, \
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.type = REGULATOR_VOLTAGE, \
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.id = MC13783_ ## prefix ## _ ## _name, \
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.owner = THIS_MODULE, \
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}, \
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.reg = MC13783_REG_ ## _reg, \
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.enable_bit = MC13783_REG_ ## _reg ## _ ## _name ## EN, \
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.vsel_reg = MC13783_REG_ ## _vsel_reg, \
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.vsel_shift = MC13783_REG_ ## _vsel_reg ## _ ## _name ## VSEL,\
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.vsel_mask = MC13783_REG_ ## _vsel_reg ## _ ## _name ## VSEL_M,\
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.voltages = _voltages, \
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}
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#define MC13783_FIXED_DEFINE(prefix, _name, _reg, _voltages) \
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[MC13783_ ## prefix ## _ ## _name] = { \
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.desc = { \
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.name = #prefix "_" #_name, \
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.n_voltages = ARRAY_SIZE(_voltages), \
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.ops = &mc13783_fixed_regulator_ops, \
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.type = REGULATOR_VOLTAGE, \
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.id = MC13783_ ## prefix ## _ ## _name, \
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.owner = THIS_MODULE, \
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}, \
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.reg = MC13783_REG_ ## _reg, \
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.enable_bit = MC13783_REG_ ## _reg ## _ ## _name ## EN, \
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.voltages = _voltages, \
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}
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#define MC13783_GPO_DEFINE(prefix, _name, _reg) \
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[MC13783_ ## prefix ## _ ## _name] = { \
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.desc = { \
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.name = #prefix "_" #_name, \
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@ -70,34 +210,49 @@ static struct regulator_ops mc13783_regulator_ops;
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.enable_bit = MC13783_REG_ ## _reg ## _ ## _name ## EN, \
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}
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#define MC13783_DEFINE_SW(_name, _reg) MC13783_DEFINE(SW, _name, _reg)
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#define MC13783_DEFINE_REGU(_name, _reg) MC13783_DEFINE(REGU, _name, _reg)
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#define MC13783_DEFINE_SW(_name, _reg, _vsel_reg, _voltages) \
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MC13783_DEFINE(SW, _name, _reg, _vsel_reg, _voltages)
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#define MC13783_DEFINE_REGU(_name, _reg, _vsel_reg, _voltages) \
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MC13783_DEFINE(REGU, _name, _reg, _vsel_reg, _voltages)
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static struct mc13783_regulator mc13783_regulators[] = {
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MC13783_DEFINE_SW(SW3, SWITCHERS5),
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MC13783_DEFINE_SW(PLL, SWITCHERS4),
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MC13783_DEFINE_SW(SW3, SWITCHERS5, SWITCHERS5, mc13783_sw3_val),
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MC13783_DEFINE_REGU(VAUDIO, REGULATORMODE0),
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MC13783_DEFINE_REGU(VIOHI, REGULATORMODE0),
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MC13783_DEFINE_REGU(VIOLO, REGULATORMODE0),
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MC13783_DEFINE_REGU(VDIG, REGULATORMODE0),
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MC13783_DEFINE_REGU(VGEN, REGULATORMODE0),
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MC13783_DEFINE_REGU(VRFDIG, REGULATORMODE0),
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MC13783_DEFINE_REGU(VRFREF, REGULATORMODE0),
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MC13783_DEFINE_REGU(VRFCP, REGULATORMODE0),
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MC13783_DEFINE_REGU(VSIM, REGULATORMODE1),
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MC13783_DEFINE_REGU(VESIM, REGULATORMODE1),
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MC13783_DEFINE_REGU(VCAM, REGULATORMODE1),
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MC13783_DEFINE_REGU(VRFBG, REGULATORMODE1),
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MC13783_DEFINE_REGU(VVIB, REGULATORMODE1),
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MC13783_DEFINE_REGU(VRF1, REGULATORMODE1),
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MC13783_DEFINE_REGU(VRF2, REGULATORMODE1),
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MC13783_DEFINE_REGU(VMMC1, REGULATORMODE1),
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MC13783_DEFINE_REGU(VMMC2, REGULATORMODE1),
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MC13783_DEFINE_REGU(GPO1, POWERMISC),
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MC13783_DEFINE_REGU(GPO2, POWERMISC),
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MC13783_DEFINE_REGU(GPO3, POWERMISC),
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MC13783_DEFINE_REGU(GPO4, POWERMISC),
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MC13783_FIXED_DEFINE(REGU, VAUDIO, REGULATORMODE0, mc13783_vaudio_val),
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MC13783_FIXED_DEFINE(REGU, VIOHI, REGULATORMODE0, mc13783_viohi_val),
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MC13783_DEFINE_REGU(VIOLO, REGULATORMODE0, REGULATORSETTING0, \
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mc13783_violo_val),
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MC13783_DEFINE_REGU(VDIG, REGULATORMODE0, REGULATORSETTING0, \
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mc13783_vdig_val),
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MC13783_DEFINE_REGU(VGEN, REGULATORMODE0, REGULATORSETTING0, \
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mc13783_vgen_val),
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MC13783_DEFINE_REGU(VRFDIG, REGULATORMODE0, REGULATORSETTING0, \
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mc13783_vrfdig_val),
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MC13783_DEFINE_REGU(VRFREF, REGULATORMODE0, REGULATORSETTING0, \
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mc13783_vrfref_val),
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MC13783_DEFINE_REGU(VRFCP, REGULATORMODE0, REGULATORSETTING0, \
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mc13783_vrfcp_val),
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MC13783_DEFINE_REGU(VSIM, REGULATORMODE1, REGULATORSETTING0, \
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mc13783_vsim_val),
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MC13783_DEFINE_REGU(VESIM, REGULATORMODE1, REGULATORSETTING0, \
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mc13783_vesim_val),
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MC13783_DEFINE_REGU(VCAM, REGULATORMODE1, REGULATORSETTING0, \
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mc13783_vcam_val),
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MC13783_FIXED_DEFINE(REGU, VRFBG, REGULATORMODE1, mc13783_vrfbg_val),
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MC13783_DEFINE_REGU(VVIB, REGULATORMODE1, REGULATORSETTING1, \
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mc13783_vvib_val),
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MC13783_DEFINE_REGU(VRF1, REGULATORMODE1, REGULATORSETTING1, \
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mc13783_vrf_val),
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MC13783_DEFINE_REGU(VRF2, REGULATORMODE1, REGULATORSETTING1, \
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mc13783_vrf_val),
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MC13783_DEFINE_REGU(VMMC1, REGULATORMODE1, REGULATORSETTING1, \
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mc13783_vmmc_val),
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MC13783_DEFINE_REGU(VMMC2, REGULATORMODE1, REGULATORSETTING1, \
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mc13783_vmmc_val),
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MC13783_GPO_DEFINE(REGU, GPO1, POWERMISC),
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MC13783_GPO_DEFINE(REGU, GPO2, POWERMISC),
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MC13783_GPO_DEFINE(REGU, GPO3, POWERMISC),
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MC13783_GPO_DEFINE(REGU, GPO4, POWERMISC),
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};
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struct mc13783_regulator_priv {
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@ -154,10 +309,140 @@ static int mc13783_regulator_is_enabled(struct regulator_dev *rdev)
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return (val & mc13783_regulators[id].enable_bit) != 0;
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}
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static int mc13783_regulator_list_voltage(struct regulator_dev *rdev,
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unsigned selector)
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{
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int id = rdev_get_id(rdev);
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if (selector >= mc13783_regulators[id].desc.n_voltages)
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return -EINVAL;
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return mc13783_regulators[id].voltages[selector];
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}
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static int mc13783_get_best_voltage_index(struct regulator_dev *rdev,
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int min_uV, int max_uV)
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{
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int reg_id = rdev_get_id(rdev);
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int i;
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int bestmatch;
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int bestindex;
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/*
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* Locate the minimum voltage fitting the criteria on
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* this regulator. The switchable voltages are not
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* in strict falling order so we need to check them
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* all for the best match.
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*/
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bestmatch = INT_MAX;
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bestindex = -1;
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for (i = 0; i < mc13783_regulators[reg_id].desc.n_voltages; i++) {
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if (mc13783_regulators[reg_id].voltages[i] >= min_uV &&
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mc13783_regulators[reg_id].voltages[i] < bestmatch) {
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bestmatch = mc13783_regulators[reg_id].voltages[i];
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bestindex = i;
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}
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}
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if (bestindex < 0 || bestmatch > max_uV) {
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dev_warn(&rdev->dev, "no possible value for %d<=x<=%d uV\n",
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min_uV, max_uV);
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return -EINVAL;
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}
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return bestindex;
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}
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static int mc13783_regulator_set_voltage(struct regulator_dev *rdev,
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int min_uV, int max_uV)
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{
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struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev);
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int value, id = rdev_get_id(rdev);
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int ret;
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dev_dbg(rdev_get_dev(rdev), "%s id: %d min_uV: %d max_uV: %d\n",
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__func__, id, min_uV, max_uV);
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/* Find the best index */
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value = mc13783_get_best_voltage_index(rdev, min_uV, max_uV);
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dev_dbg(rdev_get_dev(rdev), "%s best value: %d \n", __func__, value);
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if (value < 0)
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return value;
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mc13783_lock(priv->mc13783);
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ret = mc13783_reg_rmw(priv->mc13783, mc13783_regulators[id].vsel_reg,
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mc13783_regulators[id].vsel_mask,
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value << mc13783_regulators[id].vsel_shift);
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mc13783_unlock(priv->mc13783);
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return ret;
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}
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static int mc13783_regulator_get_voltage(struct regulator_dev *rdev)
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{
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struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev);
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int ret, id = rdev_get_id(rdev);
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unsigned int val;
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dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
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mc13783_lock(priv->mc13783);
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ret = mc13783_reg_read(priv->mc13783,
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mc13783_regulators[id].vsel_reg, &val);
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mc13783_unlock(priv->mc13783);
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if (ret)
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return ret;
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val = (val & mc13783_regulators[id].vsel_mask)
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>> mc13783_regulators[id].vsel_shift;
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dev_dbg(rdev_get_dev(rdev), "%s id: %d val: %d\n", __func__, id, val);
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BUG_ON(val < 0 || val > mc13783_regulators[id].desc.n_voltages);
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return mc13783_regulators[id].voltages[val];
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}
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static struct regulator_ops mc13783_regulator_ops = {
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.enable = mc13783_regulator_enable,
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.disable = mc13783_regulator_disable,
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.is_enabled = mc13783_regulator_is_enabled,
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.list_voltage = mc13783_regulator_list_voltage,
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.set_voltage = mc13783_regulator_set_voltage,
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.get_voltage = mc13783_regulator_get_voltage,
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};
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static int mc13783_fixed_regulator_set_voltage(struct regulator_dev *rdev,
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int min_uV, int max_uV)
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{
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int id = rdev_get_id(rdev);
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dev_dbg(rdev_get_dev(rdev), "%s id: %d min_uV: %d max_uV: %d\n",
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__func__, id, min_uV, max_uV);
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if (min_uV > mc13783_regulators[id].voltages[0] &&
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max_uV < mc13783_regulators[id].voltages[0])
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return 0;
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else
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return -EINVAL;
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}
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static int mc13783_fixed_regulator_get_voltage(struct regulator_dev *rdev)
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{
|
||||
int id = rdev_get_id(rdev);
|
||||
|
||||
dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
|
||||
|
||||
return mc13783_regulators[id].voltages[0];
|
||||
}
|
||||
|
||||
static struct regulator_ops mc13783_fixed_regulator_ops = {
|
||||
.enable = mc13783_regulator_enable,
|
||||
.disable = mc13783_regulator_disable,
|
||||
.is_enabled = mc13783_regulator_is_enabled,
|
||||
.list_voltage = mc13783_regulator_list_voltage,
|
||||
.set_voltage = mc13783_fixed_regulator_set_voltage,
|
||||
.get_voltage = mc13783_fixed_regulator_get_voltage,
|
||||
};
|
||||
|
||||
static int __devinit mc13783_regulator_probe(struct platform_device *pdev)
|
||||
|
|
|
|||
Loading…
Reference in New Issue