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regulator: bd718x7: Add enable times
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Use the typical startup times from the data sheet so boards get a
reasonable default. Not setting any enable time can lead to board hangs
when e.g. clocks are enabled too soon afterwards.

This fixes gpu power domain resume on the Librem 5.

[Moved #defines into driver, seems to be general agreement and avoids any
cross tree issues -- broonie]

Signed-off-by: Guido Günther <agx@sigxcpu.org>
Reviewed-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Link: https://lore.kernel.org/r/41fb2ed19f584f138336344e2297ae7301f72b75.1608316658.git.agx@sigxcpu.org
Signed-off-by: Mark Brown <broonie@kernel.org>
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Guido Günther authored and Mark Brown committed Dec 21, 2020
1 parent df9716e commit 3b66e4a
Showing 1 changed file with 57 additions and 0 deletions.
57 changes: 57 additions & 0 deletions drivers/regulator/bd718x7-regulator.c
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Original file line number Diff line number Diff line change
Expand Up @@ -15,6 +15,36 @@
#include <linux/regulator/of_regulator.h>
#include <linux/slab.h>

/* Typical regulator startup times as per data sheet in uS */
#define BD71847_BUCK1_STARTUP_TIME 144
#define BD71847_BUCK2_STARTUP_TIME 162
#define BD71847_BUCK3_STARTUP_TIME 162
#define BD71847_BUCK4_STARTUP_TIME 240
#define BD71847_BUCK5_STARTUP_TIME 270
#define BD71847_BUCK6_STARTUP_TIME 200
#define BD71847_LDO1_STARTUP_TIME 440
#define BD71847_LDO2_STARTUP_TIME 370
#define BD71847_LDO3_STARTUP_TIME 310
#define BD71847_LDO4_STARTUP_TIME 400
#define BD71847_LDO5_STARTUP_TIME 530
#define BD71847_LDO6_STARTUP_TIME 400

#define BD71837_BUCK1_STARTUP_TIME 160
#define BD71837_BUCK2_STARTUP_TIME 180
#define BD71837_BUCK3_STARTUP_TIME 180
#define BD71837_BUCK4_STARTUP_TIME 180
#define BD71837_BUCK5_STARTUP_TIME 160
#define BD71837_BUCK6_STARTUP_TIME 240
#define BD71837_BUCK7_STARTUP_TIME 220
#define BD71837_BUCK8_STARTUP_TIME 200
#define BD71837_LDO1_STARTUP_TIME 440
#define BD71837_LDO2_STARTUP_TIME 370
#define BD71837_LDO3_STARTUP_TIME 310
#define BD71837_LDO4_STARTUP_TIME 400
#define BD71837_LDO5_STARTUP_TIME 310
#define BD71837_LDO6_STARTUP_TIME 400
#define BD71837_LDO7_STARTUP_TIME 530

/*
* BD718(37/47/50) have two "enable control modes". ON/OFF can either be
* controlled by software - or by PMIC internal HW state machine. Whether
Expand Down Expand Up @@ -613,6 +643,7 @@ static struct bd718xx_regulator_data bd71847_regulators[] = {
.vsel_mask = DVS_BUCK_RUN_MASK,
.enable_reg = BD718XX_REG_BUCK1_CTRL,
.enable_mask = BD718XX_BUCK_EN,
.enable_time = BD71847_BUCK1_STARTUP_TIME,
.owner = THIS_MODULE,
.of_parse_cb = buck_set_hw_dvs_levels,
},
Expand Down Expand Up @@ -646,6 +677,7 @@ static struct bd718xx_regulator_data bd71847_regulators[] = {
.vsel_mask = DVS_BUCK_RUN_MASK,
.enable_reg = BD718XX_REG_BUCK2_CTRL,
.enable_mask = BD718XX_BUCK_EN,
.enable_time = BD71847_BUCK2_STARTUP_TIME,
.owner = THIS_MODULE,
.of_parse_cb = buck_set_hw_dvs_levels,
},
Expand Down Expand Up @@ -680,6 +712,7 @@ static struct bd718xx_regulator_data bd71847_regulators[] = {
.linear_range_selectors = bd71847_buck3_volt_range_sel,
.enable_reg = BD718XX_REG_1ST_NODVS_BUCK_CTRL,
.enable_mask = BD718XX_BUCK_EN,
.enable_time = BD71847_BUCK3_STARTUP_TIME,
.owner = THIS_MODULE,
},
.init = {
Expand All @@ -706,6 +739,7 @@ static struct bd718xx_regulator_data bd71847_regulators[] = {
.vsel_range_mask = BD71847_BUCK4_RANGE_MASK,
.linear_range_selectors = bd71847_buck4_volt_range_sel,
.enable_mask = BD718XX_BUCK_EN,
.enable_time = BD71847_BUCK4_STARTUP_TIME,
.owner = THIS_MODULE,
},
.init = {
Expand All @@ -727,6 +761,7 @@ static struct bd718xx_regulator_data bd71847_regulators[] = {
.vsel_mask = BD718XX_3RD_NODVS_BUCK_MASK,
.enable_reg = BD718XX_REG_3RD_NODVS_BUCK_CTRL,
.enable_mask = BD718XX_BUCK_EN,
.enable_time = BD71847_BUCK5_STARTUP_TIME,
.owner = THIS_MODULE,
},
.init = {
Expand All @@ -750,6 +785,7 @@ static struct bd718xx_regulator_data bd71847_regulators[] = {
.vsel_mask = BD718XX_4TH_NODVS_BUCK_MASK,
.enable_reg = BD718XX_REG_4TH_NODVS_BUCK_CTRL,
.enable_mask = BD718XX_BUCK_EN,
.enable_time = BD71847_BUCK6_STARTUP_TIME,
.owner = THIS_MODULE,
},
.init = {
Expand All @@ -775,6 +811,7 @@ static struct bd718xx_regulator_data bd71847_regulators[] = {
.linear_range_selectors = bd718xx_ldo1_volt_range_sel,
.enable_reg = BD718XX_REG_LDO1_VOLT,
.enable_mask = BD718XX_LDO_EN,
.enable_time = BD71847_LDO1_STARTUP_TIME,
.owner = THIS_MODULE,
},
.init = {
Expand All @@ -796,6 +833,7 @@ static struct bd718xx_regulator_data bd71847_regulators[] = {
.n_voltages = ARRAY_SIZE(ldo_2_volts),
.enable_reg = BD718XX_REG_LDO2_VOLT,
.enable_mask = BD718XX_LDO_EN,
.enable_time = BD71847_LDO2_STARTUP_TIME,
.owner = THIS_MODULE,
},
.init = {
Expand All @@ -818,6 +856,7 @@ static struct bd718xx_regulator_data bd71847_regulators[] = {
.vsel_mask = BD718XX_LDO3_MASK,
.enable_reg = BD718XX_REG_LDO3_VOLT,
.enable_mask = BD718XX_LDO_EN,
.enable_time = BD71847_LDO3_STARTUP_TIME,
.owner = THIS_MODULE,
},
.init = {
Expand All @@ -840,6 +879,7 @@ static struct bd718xx_regulator_data bd71847_regulators[] = {
.vsel_mask = BD718XX_LDO4_MASK,
.enable_reg = BD718XX_REG_LDO4_VOLT,
.enable_mask = BD718XX_LDO_EN,
.enable_time = BD71847_LDO4_STARTUP_TIME,
.owner = THIS_MODULE,
},
.init = {
Expand All @@ -865,6 +905,7 @@ static struct bd718xx_regulator_data bd71847_regulators[] = {
.linear_range_selectors = bd71847_ldo5_volt_range_sel,
.enable_reg = BD718XX_REG_LDO5_VOLT,
.enable_mask = BD718XX_LDO_EN,
.enable_time = BD71847_LDO5_STARTUP_TIME,
.owner = THIS_MODULE,
},
.init = {
Expand All @@ -889,6 +930,7 @@ static struct bd718xx_regulator_data bd71847_regulators[] = {
.vsel_mask = BD718XX_LDO6_MASK,
.enable_reg = BD718XX_REG_LDO6_VOLT,
.enable_mask = BD718XX_LDO_EN,
.enable_time = BD71847_LDO6_STARTUP_TIME,
.owner = THIS_MODULE,
},
.init = {
Expand Down Expand Up @@ -942,6 +984,7 @@ static struct bd718xx_regulator_data bd71837_regulators[] = {
.vsel_mask = DVS_BUCK_RUN_MASK,
.enable_reg = BD718XX_REG_BUCK1_CTRL,
.enable_mask = BD718XX_BUCK_EN,
.enable_time = BD71837_BUCK1_STARTUP_TIME,
.owner = THIS_MODULE,
.of_parse_cb = buck_set_hw_dvs_levels,
},
Expand Down Expand Up @@ -975,6 +1018,7 @@ static struct bd718xx_regulator_data bd71837_regulators[] = {
.vsel_mask = DVS_BUCK_RUN_MASK,
.enable_reg = BD718XX_REG_BUCK2_CTRL,
.enable_mask = BD718XX_BUCK_EN,
.enable_time = BD71837_BUCK2_STARTUP_TIME,
.owner = THIS_MODULE,
.of_parse_cb = buck_set_hw_dvs_levels,
},
Expand Down Expand Up @@ -1005,6 +1049,7 @@ static struct bd718xx_regulator_data bd71837_regulators[] = {
.vsel_mask = DVS_BUCK_RUN_MASK,
.enable_reg = BD71837_REG_BUCK3_CTRL,
.enable_mask = BD718XX_BUCK_EN,
.enable_time = BD71837_BUCK3_STARTUP_TIME,
.owner = THIS_MODULE,
.of_parse_cb = buck_set_hw_dvs_levels,
},
Expand Down Expand Up @@ -1033,6 +1078,7 @@ static struct bd718xx_regulator_data bd71837_regulators[] = {
.vsel_mask = DVS_BUCK_RUN_MASK,
.enable_reg = BD71837_REG_BUCK4_CTRL,
.enable_mask = BD718XX_BUCK_EN,
.enable_time = BD71837_BUCK4_STARTUP_TIME,
.owner = THIS_MODULE,
.of_parse_cb = buck_set_hw_dvs_levels,
},
Expand Down Expand Up @@ -1065,6 +1111,7 @@ static struct bd718xx_regulator_data bd71837_regulators[] = {
.linear_range_selectors = bd71837_buck5_volt_range_sel,
.enable_reg = BD718XX_REG_1ST_NODVS_BUCK_CTRL,
.enable_mask = BD718XX_BUCK_EN,
.enable_time = BD71837_BUCK5_STARTUP_TIME,
.owner = THIS_MODULE,
},
.init = {
Expand All @@ -1088,6 +1135,7 @@ static struct bd718xx_regulator_data bd71837_regulators[] = {
.vsel_mask = BD71837_BUCK6_MASK,
.enable_reg = BD718XX_REG_2ND_NODVS_BUCK_CTRL,
.enable_mask = BD718XX_BUCK_EN,
.enable_time = BD71837_BUCK6_STARTUP_TIME,
.owner = THIS_MODULE,
},
.init = {
Expand All @@ -1109,6 +1157,7 @@ static struct bd718xx_regulator_data bd71837_regulators[] = {
.vsel_mask = BD718XX_3RD_NODVS_BUCK_MASK,
.enable_reg = BD718XX_REG_3RD_NODVS_BUCK_CTRL,
.enable_mask = BD718XX_BUCK_EN,
.enable_time = BD71837_BUCK7_STARTUP_TIME,
.owner = THIS_MODULE,
},
.init = {
Expand All @@ -1132,6 +1181,7 @@ static struct bd718xx_regulator_data bd71837_regulators[] = {
.vsel_mask = BD718XX_4TH_NODVS_BUCK_MASK,
.enable_reg = BD718XX_REG_4TH_NODVS_BUCK_CTRL,
.enable_mask = BD718XX_BUCK_EN,
.enable_time = BD71837_BUCK8_STARTUP_TIME,
.owner = THIS_MODULE,
},
.init = {
Expand All @@ -1157,6 +1207,7 @@ static struct bd718xx_regulator_data bd71837_regulators[] = {
.linear_range_selectors = bd718xx_ldo1_volt_range_sel,
.enable_reg = BD718XX_REG_LDO1_VOLT,
.enable_mask = BD718XX_LDO_EN,
.enable_time = BD71837_LDO1_STARTUP_TIME,
.owner = THIS_MODULE,
},
.init = {
Expand All @@ -1178,6 +1229,7 @@ static struct bd718xx_regulator_data bd71837_regulators[] = {
.n_voltages = ARRAY_SIZE(ldo_2_volts),
.enable_reg = BD718XX_REG_LDO2_VOLT,
.enable_mask = BD718XX_LDO_EN,
.enable_time = BD71837_LDO2_STARTUP_TIME,
.owner = THIS_MODULE,
},
.init = {
Expand All @@ -1200,6 +1252,7 @@ static struct bd718xx_regulator_data bd71837_regulators[] = {
.vsel_mask = BD718XX_LDO3_MASK,
.enable_reg = BD718XX_REG_LDO3_VOLT,
.enable_mask = BD718XX_LDO_EN,
.enable_time = BD71837_LDO3_STARTUP_TIME,
.owner = THIS_MODULE,
},
.init = {
Expand All @@ -1222,6 +1275,7 @@ static struct bd718xx_regulator_data bd71837_regulators[] = {
.vsel_mask = BD718XX_LDO4_MASK,
.enable_reg = BD718XX_REG_LDO4_VOLT,
.enable_mask = BD718XX_LDO_EN,
.enable_time = BD71837_LDO4_STARTUP_TIME,
.owner = THIS_MODULE,
},
.init = {
Expand All @@ -1246,6 +1300,7 @@ static struct bd718xx_regulator_data bd71837_regulators[] = {
.vsel_mask = BD71837_LDO5_MASK,
.enable_reg = BD718XX_REG_LDO5_VOLT,
.enable_mask = BD718XX_LDO_EN,
.enable_time = BD71837_LDO5_STARTUP_TIME,
.owner = THIS_MODULE,
},
.init = {
Expand All @@ -1272,6 +1327,7 @@ static struct bd718xx_regulator_data bd71837_regulators[] = {
.vsel_mask = BD718XX_LDO6_MASK,
.enable_reg = BD718XX_REG_LDO6_VOLT,
.enable_mask = BD718XX_LDO_EN,
.enable_time = BD71837_LDO6_STARTUP_TIME,
.owner = THIS_MODULE,
},
.init = {
Expand All @@ -1296,6 +1352,7 @@ static struct bd718xx_regulator_data bd71837_regulators[] = {
.vsel_mask = BD71837_LDO7_MASK,
.enable_reg = BD71837_REG_LDO7_VOLT,
.enable_mask = BD718XX_LDO_EN,
.enable_time = BD71837_LDO7_STARTUP_TIME,
.owner = THIS_MODULE,
},
.init = {
Expand Down

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