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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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022dcdf083
The datasheet says 00000000 to 00101110 are reserved, and the min value of the
voltage setting is 1.8 V.
Thus don't write 0 to AUTO output voltage select register (address 1Ah).
Table 50. AUTOOUT - AUTO output voltage select register (address 1Ah) bit description[1]
Bit Symbol Access Description
7:0 auto_out R/W VO(prog) = 0.625 + auto_out × 0.025 V
eg. 00000000 to 00101110: reserved
00101111: 1.8 V (min)
01010011: 2.7 V
01101010: 3.275 V
01101011: 3.300 V
01101100: 3.325 V
01111111 : 3.800 V (max)
..... .....
11111110 : 3.800 V
11111111 : 3.800 V
This patch also fixes a bug in pcf50633_regulator_list_voltage:
In regulator core _regulator_do_set_voltage function:
if (rdev->desc->ops->set_voltage) {
ret = rdev->desc->ops->set_voltage(rdev, min_uV, max_uV,
&selector);
if (rdev->desc->ops->list_voltage)
selector = rdev->desc->ops->list_voltage(rdev,
selector);
else
selector = -1;
The list_voltage call here takes the selector got from set_voltage callback.
Thus adding 0x2f to the index in pcf50633_regulator_list_voltage looks wrong to me.
e.g.
If min_uV < 1.8V, pcf50633_regulator_set_voltage sets 0 to selector.
For this case, adding 0x2f to the index in pcf50633_regulator_list_voltage is correct.
However, if min_uV == 1.8V, pcf50633_regulator_set_voltage sets 0x2f to selector.
Adding 0x2f to the index in pcf50633_regulator_list_voltage in this case is wrong.
What this patch does is:
The minimal voltage setting for AUTOOUT is 0x2f.
Thus for the case min_uV < 1.8, set the voltage setting to 1.8V by writting
0x2f to AUTOOUT register and set selector = 0x2f.
So we don't write the rserved range to AUTOOUT register.
Which means the possible range of AUTOOUT register value is 0x2f ~ 0xff.
We have no problem in regulator_get_voltage.
Since we won't write 0~0x2e to AUTOOUT register, we have no problem converting
the bits we read to voltage. The equation in auto_voltage_value works fine.
For list_voltage, we need to take into account the case selector is 0 ~ 0x2e
because the regulator core assumes the selector is starting from 0.
This patch returns 0 for the cases selector is 0 ~ 0x2e, which means
"this selector code can't be used on this system".
The regulator core iterates from 0 to n_voltages to find the small voltage
in the specific range. The n_voltages settings for AUTOOUT should be 128 now,
including the reserved range of AUTOOUT.
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
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 | ||
| core.c | ||
| da903x.c | ||
| da9052-regulator.c | ||
| db8500-prcmu.c | ||
| dbx500-prcmu.c | ||
| dbx500-prcmu.h | ||
| dummy.c | ||
| dummy.h | ||
| fixed-helper.c | ||
| fixed.c | ||
| gpio-regulator.c | ||
| isl6271a-regulator.c | ||
| Kconfig | ||
| lp3971.c | ||
| lp3972.c | ||
| Makefile | ||
| max1586.c | ||
| max8649.c | ||
| max8660.c | ||
| max8925-regulator.c | ||
| max8952.c | ||
| max8997.c | ||
| max8998.c | ||
| mc13xxx-regulator-core.c | ||
| mc13xxx.h | ||
| mc13783-regulator.c | ||
| mc13892-regulator.c | ||
| of_regulator.c | ||
| pcap-regulator.c | ||
| pcf50633-regulator.c | ||
| s5m8767.c | ||
| tps6105x-regulator.c | ||
| tps6507x-regulator.c | ||
| tps6524x-regulator.c | ||
| tps6586x-regulator.c | ||
| tps62360-regulator.c | ||
| tps65023-regulator.c | ||
| tps65217-regulator.c | ||
| tps65910-regulator.c | ||
| tps65912-regulator.c | ||
| twl-regulator.c | ||
| userspace-consumer.c | ||
| virtual.c | ||
| wm831x-dcdc.c | ||
| wm831x-isink.c | ||
| wm831x-ldo.c | ||
| wm8350-regulator.c | ||
| wm8400-regulator.c | ||
| wm8994-regulator.c | ||