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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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58fa6ab42c
Currently we have a special code in tps80031_ldo_set_voltage_sel() to handle
LDO2 track mode for TPS80031 or TPS80032-ES1.0. The purpose is to address below
issues:
Issue description:
- LDO2 traking mode is enabled
- LDO2 tracks SMPS2 voltage.
- LDO2 automatically switch-off when LDO2_CFG_VOLTAGE is changed to some discrete values (non exhaustive list):
00011001, 00011010, 00011011, 00011100, .
- LDO2 switch-on again when LDO2_CFG_VOLTAGE is changed to other values (non exhaustive list):
00011000, 00010111, .
LDOs have reserved codes. For these codes, LDO is switch-off.
In tracking, LDO2 ref comes from SMPS2.
However LDO2 enable is still gated by LDO2 VSEL decoding.
As a result, in tracking mode LDO2 will be disabled for following code (SMPS VSEL format):
000000 & 100000 (MSB not decoded)
011001 & 111001 (MSB not decoded)
011010 & 111010 (MSB not decoded)
011100 & 111100 (MSB not decoded)
011101 & 111101 (MSB not decoded)
011110 & 111110 (MSB not decoded)
However, current code has below bugs:
1. It uses regulator_list_voltage_linear, so list_voltage() still shows above
invalid selectors have supported voltage.
2. Current code may return -EINVAL in tps80031_ldo_set_voltage_sel() for
supported voltage. This is because when we use regulator_list_voltage_linear
as list_voltage callback, regulator core will default use
regulator_map_voltage_linear(). regulator_map_voltage_linear() has an
assumption that the voltages are linear which is not true for this case.
For example,
when request voltage range is: min_uV=950000 uV && max_uV=1200000 uV
regulator_map_voltage_linear() returns the selector is 29 (0x1D),
set_voltage_sel() returns -EINVAL.
(The selector is in invalid range, 0x19 ~ 0x1f).
In above case, map_voltage() should find the lowest valid voltage within
specific range (selector = 0x20) and set_voltage_sel() should successfully
set the voltage to 987500 uV.
This patch fixes these issues by:
1. Add checking valid setting for LDO2 track mode of TPS80031 or TPS80032-ES1.0
in list_voltage. So it returns -EINVAL for invalid selectors.
2. Implement tps80031_ldo_map_voltage, use regulator_map_voltage_iterate()
to find the lowest voltage within specific range for TPS80031 or
TPS80032-ES1.0. This is required when the voltage map is no longer linear.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
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|---|---|---|
| .. | ||
| 88pm8607.c | ||
| aat2870-regulator.c | ||
| ab3100.c | ||
| ab8500.c | ||
| ad5398.c | ||
| anatop-regulator.c | ||
| arizona-ldo1.c | ||
| arizona-micsupp.c | ||
| as3711-regulator.c | ||
| core.c | ||
| da903x.c | ||
| da9052-regulator.c | ||
| da9055-regulator.c | ||
| db8500-prcmu.c | ||
| dbx500-prcmu.c | ||
| dbx500-prcmu.h | ||
| dummy.c | ||
| dummy.h | ||
| fan53555.c | ||
| fixed-helper.c | ||
| fixed.c | ||
| gpio-regulator.c | ||
| isl6271a-regulator.c | ||
| Kconfig | ||
| lp872x.c | ||
| lp3971.c | ||
| lp3972.c | ||
| lp8755.c | ||
| lp8788-buck.c | ||
| lp8788-ldo.c | ||
| Makefile | ||
| max1586.c | ||
| max8649.c | ||
| max8660.c | ||
| max8907-regulator.c | ||
| max8925-regulator.c | ||
| max8952.c | ||
| max8973-regulator.c | ||
| max8997.c | ||
| max8998.c | ||
| max77686.c | ||
| mc13xxx-regulator-core.c | ||
| mc13xxx.h | ||
| mc13783-regulator.c | ||
| mc13892-regulator.c | ||
| of_regulator.c | ||
| palmas-regulator.c | ||
| pcap-regulator.c | ||
| pcf50633-regulator.c | ||
| rc5t583-regulator.c | ||
| s2mps11.c | ||
| s5m8767.c | ||
| tps6105x-regulator.c | ||
| tps6507x-regulator.c | ||
| tps6524x-regulator.c | ||
| tps6586x-regulator.c | ||
| tps51632-regulator.c | ||
| tps62360-regulator.c | ||
| tps65023-regulator.c | ||
| tps65090-regulator.c | ||
| tps65217-regulator.c | ||
| tps65910-regulator.c | ||
| tps65912-regulator.c | ||
| tps80031-regulator.c | ||
| twl-regulator.c | ||
| userspace-consumer.c | ||
| vexpress.c | ||
| virtual.c | ||
| wm831x-dcdc.c | ||
| wm831x-isink.c | ||
| wm831x-ldo.c | ||
| wm8350-regulator.c | ||
| wm8400-regulator.c | ||
| wm8994-regulator.c | ||