regulator: mt6358: Add supply names for MT6366 regulators

The DT bindings for MT6366 regulator defines the supply names for the
PMIC.

Add support for them by adding .supply_name field settings for each
regulator. The buck regulators each have their own supply whose name
can be derived from the regulator name. The LDOs have shared supplies.

Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20230928085537.3246669-12-wenst@chromium.org
Signed-off-by: Mark Brown <broonie@kernel.org>

regulator: mt6358: Add missing regulators for MT6366

When support for the MT6366 PMIC regulators was added, it was assumed
that it had the same functionality as MT6358. In reality there are
differences. A few regulators have different ranges, or were renamed
and repurposed, or removed altogether.

Add the 3 regulators that were missing from the original submission.
These are added for completeness. VSRAM_CORE is not used in existing
projects. VM18 and VMDDR feed DRAM related consumers, and are not used
in-kernel.

Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Acked-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/20230928085537.3246669-11-wenst@chromium.org
Signed-off-by: Mark Brown <broonie@kernel.org>

regulator: mt6358: Make MT6366 vcn18 LDO configurable

The VCN18 regulator on the MT6366 (only) actually has a wide
configurable range of voltages, even though its name suggests a fixed
output voltage.

Convert it from a fixed LDO to a configurable LDO. Its range of settings
is the same as the VM18 regulator, which is missing and will be added in
a subsequent patch.

Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20230928085537.3246669-10-wenst@chromium.org
Signed-off-by: Mark Brown <broonie@kernel.org>

regulator: mt6358: fix and drop type prefix in MT6366 regulator node names

The new MT6366 binding does away with the type prefix ("buck_", "ldo_")
in the regulator node names. This better matches the PMIC pin names.
Remaining underscores in names are also replaced with hyphens.

Drop the type prefixes and replace remaining underscores to match the
MT6366 binding.

Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20230928085537.3246669-9-wenst@chromium.org
Signed-off-by: Mark Brown <broonie@kernel.org>

regulator: mt6358: Add supply names for MT6358 regulators

The DT bindings for MT6358 regulator now defines the supply names for the
PMIC.

Add support for them by adding .supply_name field settings for each
regulator.

Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20230928085537.3246669-8-wenst@chromium.org
Signed-off-by: Mark Brown <broonie@kernel.org>

regulator: mt6358: Use mt6397-regulator.h binding header for buck mode macros

The (undocumented) possible values for the buck operating modes on the
MT6358 are the same as those on the MT6397, both for the device tree
bindings and the actual hardware register values.

Reuse the macros for the MT6397 PMIC in the MT6358 regulator driver by
including the mt6397-regulator.h binding header and replacing the
existing macros. This aligns it with other PMIC.

Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20230928085537.3246669-7-wenst@chromium.org
Signed-off-by: Mark Brown <broonie@kernel.org>

regulator: mt6358: Add output voltage fine tuning to variable LDOs

Some of the LDO regulators in the MT6358/MT6366 have sparsely populated
voltage tables, supported by custom get/set operators. While it works,
it requires more code and an extra field to store the lookup table.
These LDOs also have fine voltage calibration settings that can slightly
boost the output voltage from 0 mV to 100 mV, in 10 mV increments.

These combined could be modeled as a pickable set of linear ranges. The
coarse voltage setting is modeled as the range selector, while each
range has 11 selectors, starting from the range's base voltage, up to
+100 mV, in 10mV increments.

Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20230913082919.1631287-4-wenst@chromium.org
Signed-off-by: Mark Brown <broonie@kernel.org>

regulator: mt6358: Add output voltage fine tuning to fixed regulators

The "fixed" LDO regulators found on the MT6358 and MT6366 PMICs have
either no voltage selection register, or only one valid setting.
However these do have a fine voltage calibration setting that can
slightly boost the output voltage from 0 mV to 100 mV, in 10 mV
increments.

Add support for this by changing these into linear range regulators.
Some register definitions that are missing are also added.

Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Acked-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/20230913082919.1631287-3-wenst@chromium.org
Signed-off-by: Mark Brown <broonie@kernel.org>

regulator: mt6358: Fail probe on unknown chip ID

The MT6358 and MT6366 PMICs, and likely many others from MediaTek, have
a chip ID register, making the chip semi-discoverable.

The driver currently supports two PMICs and expects to be probed on one
or the other. It does not account for incorrect mfd driver entries or
device trees. While these should not happen, if they do, it could be
catastrophic for the device. The driver should be sure the hardware is
what it expects.

Make the driver fail to probe if the chip ID presented is not a known
one.

Suggested-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Fixes: f0e3c6261af1 ("regulator: mt6366: Add support for MT6366 regulator")
Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20230913082919.1631287-2-wenst@chromium.org
Signed-off-by: Mark Brown <broonie@kernel.org>

regulator: mt6358: split ops for buck and linear range LDO regulators

The buck and linear range LDO (VSRAM_*) regulators share one set of ops.
This set includes support for get/set mode. However this only makes
sense for buck regulators, not LDOs. The callbacks were not checking
whether the register offset and/or mask for mode setting was valid or
not. This ends up making the kernel report "normal" mode operation for
the LDOs.

Create a new set of ops without the get/set mode callbacks for the
linear range LDO regulators.

Fixes: f67ff1bd58f0 ("regulator: mt6358: Add support for MT6358 regulator")
Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
Link: https://lore.kernel.org/r/20230920085336.136238-1-wenst@chromium.org
Signed-off-by: Mark Brown <broonie@kernel.org>

regulator: mt6358: Fix incorrect VCN33 sync error message

After syncing the enable status of VCN33_WIFI to VCN33_BT, the driver
will disable VCN33_WIFI. If it fails it will error out with a message.
However the error message incorrectly refers to VCN33_BT.

Fix the error message so that it correctly refers to VCN33_WIFI.

Suggested-by: Fei Shao <fshao@chromium.org>
Fixes: 65bae54e08c1 ("regulator: mt6358: Merge VCN33_* regulators")
Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20230721082903.2038975-4-wenst@chromium.org
Signed-off-by: Mark Brown <broonie@kernel.org>

regulator: mt6358: Sync VCN33_* enable status after checking ID

Syncing VCN33_* enable status should be done after checking the PMIC's
ID, to avoid setting random bits on other PMICs.

Suggested-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Fixes: 65bae54e08c1 ("regulator: mt6358: Merge VCN33_* regulators")
Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20230721082903.2038975-3-wenst@chromium.org
Signed-off-by: Mark Brown <broonie@kernel.org>

regulator: mt6358: Use linear voltage helpers for single range regulators

Some of the regulators on the MT6358/MT6366 PMICs have just one linear
voltage range. These are the bulk regulators and VSRAM_* LDOs. Currently
they are modeled with one linear range, but also have their minimum,
maximum, and step voltage described.

Convert them to the linear voltage helpers. These helpers are a bit
simpler, and we can also drop the linear range definitions. Also reflow
the touched lines now that they are shorter.

Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
Link: https://lore.kernel.org/r/20230609083009.2822259-7-wenst@chromium.org
Signed-off-by: Mark Brown <broonie@kernel.org>

regulator: mt6358: Const-ify mt6358_regulator_info data structures

In the MT6358 regulator driver, each regulator is described by a
|struct regulator_desc| wrapped by a |struct mt6358_regulator_info|.
The latter was tied to the regulator device using the config's
driver_data field, which meant that the variables could not be constant.

Since each regulator device has a pointer to its regulator_desc, and
mt6358_regulator_info wraps that, the driver could use container_of()
to retrieve it instead.

Switch to using container_of(), drop tha driver_data setting, and
const-ify all the regulator descriptions.

Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
Link: https://lore.kernel.org/r/20230609083009.2822259-6-wenst@chromium.org
Signed-off-by: Mark Brown <broonie@kernel.org>

regulator: mt6358: Drop *_SSHUB regulators

The *_SSHUB regulators are actually alternate configuration interfaces
for their non *_SSHUB counterparts. They are not separate regulator
outputs. These registers are intended for the companion processor to
use to configure the power rails while the main processor is sleeping.
They are not intended for the main operating system to use.

Since they are not real outputs they shouldn't be modeled separately.
Remove them. Luckily no device tree actually uses them.

Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Link: https://lore.kernel.org/r/20230609083009.2822259-5-wenst@chromium.org
Signed-off-by: Mark Brown <broonie@kernel.org>

regulator: mt6358: Merge VCN33_* regulators

The VCN33_BT and VCN33_WIFI regulators are actually the same regulator,
having the same voltage setting and output pin. There are simply two
enable bits that are ORed together to enable the regulator.

Having two regulators representing the same output pin is misleading
from a design matching standpoint, and also error-prone in driver
implementations. If consumers try to set different voltages on either
regulator, the one set later would override the one set before. There
are ways around this, such as chaining them together and having the
downstream one act as a switch. But given there's only one output pin,
such a workaround doesn't match reality.

Remove the VCN33_WIFI regulator. During the probe phase, have the driver
sync the enable status of VCN33_WIFI to VCN33_BT. Also drop the suffix
so that the regulator name matches the pin name in the datasheet.

Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
Link: https://lore.kernel.org/r/20230609083009.2822259-4-wenst@chromium.org
Signed-off-by: Mark Brown <broonie@kernel.org>

regulator: Set PROBE_PREFER_ASYNCHRONOUS for drivers between 4.19 and 5.4

This follows on the change ("regulator: Set PROBE_PREFER_ASYNCHRONOUS
for drivers that existed in 4.14") but changes regulators didn't exist
in Linux 4.19 but did exist in Linux 5.4.

Signed-off-by: Douglas Anderson <dianders@chromium.org>
Link: https://lore.kernel.org/r/20230316125351.3.I45bf925ca9537da5f647e2acb0ad207c0c98af81@changeid
Signed-off-by: Mark Brown <broonie@kernel.org>

regulator: mt6366: Add support for MT6366 regulator

The MT6366 is a regulator found on boards based on MediaTek MT8186 and
probably other SoCs. It is a so called pmic and connects as a slave to
SoC using SPI, wrapped inside the pmic-wrapper.

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Johnson Wang <johnson.wang@mediatek.com>
Link: https://lore.kernel.org/r/20220401080212.27383-2-johnson.wang@mediatek.com
Signed-off-by: Mark Brown <broonie@kernel.org>

regulator: mt6366: Add support for MT6366 regulator

The MT6366 is a regulator found on boards based on MediaTek MT8186 and
probably other SoCs. It is a so called pmic and connects as a slave to
SoC using SPI, wrapped inside the pmic-wrapper.

Reviewed-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Johnson Wang <johnson.wang@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20220317030402.24894-2-johnson.wang@mediatek.com
Signed-off-by: Mark Brown <broonie@kernel.org>

regulator: mt6358: Remove shift fields from struct mt6358_regulator_info

The shift setting can be calculated via the corresponding mask field,
so remove these shift fields.

The usage of da_vsel_mask is different from other mask defines because
current code does shift regval before mask with the da_vsel_mask.
Do proper shit to da_vsel_mask setting so we can calculate the shift.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Link: https://lore.kernel.org/r/20210629130503.2183574-1-axel.lin@ingics.com
Signed-off-by: Mark Brown <broonie@kernel.org>

regulator: mt6358: Fix vdram2 .vsel_mask

The valid vsel value are 0 and 12, so the .vsel_mask should be 0xf.

Signed-off-by: Hsin-Hsiung Wang <hsin-hsiung.wang@mediatek.com>
Reviewed-by: Axel Lin <axel.lin@ingics.com>
Link: https://lore.kernel.org/r/1624424169-510-1-git-send-email-hsin-hsiung.wang@mediatek.com
Signed-off-by: Mark Brown <broonie@kernel.org>

regulator: mt6358: Use unsigned int for volt_tables

The regulator_desc expects "const unsigned int *volt_table", thus use
unsigned int instead of u32.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Link: https://lore.kernel.org/r/20210606065052.1417111-1-axel.lin@ingics.com
Signed-off-by: Mark Brown <broonie@kernel.org>

regulator: use linear_ranges helper

Change the regulator helpers to use common linear_ranges code.

Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Reviewed-by: Mark Brown <broonie@kernel.org>
Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Acked-by: Adam Thomson <Adam.Thomson.Opensource@diasemi.com>
Link: https://lore.kernel.org/r/64f01d5e381b8631a271616b7790f9d5640974fb.1588944082.git.matti.vaittinen@fi.rohmeurope.com
Signed-off-by: Mark Brown <broonie@kernel.org>

regulator: mt6358: Add support for MT6358 regulator

The MT6358 is a regulator found on boards based on MediaTek MT8183 and
probably other SoCs. It is a so called pmic and connects as a slave to
SoC using SPI, wrapped inside the pmic-wrapper.

Signed-off-by: Hsin-Hsiung Wang <hsin-hsiung.wang@mediatek.com>
Link: https://lore.kernel.org/r/1566531931-9772-8-git-send-email-hsin-hsiung.wang@mediatek.com
Signed-off-by: Mark Brown <broonie@kernel.org>