Commit graph

174 commits

Author SHA1 Message Date
Troy Kisky
1781ec67f4 power: pmic: add dm style definitions if not CONFIG_IS_ENABLED(POWER_LEGACY)
This avoids an error in converting to CONFIG_IS_ENABLED(DM_PMIC).
Many boards SPL code needs these definitions to compile, even if
the functions are not linked.

Signed-off-by: Troy Kisky <troykiskyboundary@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2023-05-10 16:45:42 -04:00
Ye Li
69c573ca89 power: pmic: Add NXP PCA9451A PMIC support
PCA9451A uses similar BUCKs and LDO regulators as PCA9450B/C but
has LDO2 and LDO3 removed. So reuse pca9450 PMIC and regulator driver
and add new type for PCA9451A.

Signed-off-by: Ye Li <ye.li@nxp.com>
Reviewed-by: Marek Vasut <marex@denx.de>
2023-03-30 00:45:39 +02:00
Simon Glass
5f1aa5cc8a power: Drop unused fg_max17042 driver and fuel gauge code
This driver is not used. Drop it and the entire fuel_gauge directory,
since there is nothing left.

Signed-off-by: Simon Glass <sjg@chromium.org>
2023-02-07 14:33:49 -05:00
Tom Rini
3592a61fa8 For 2023.04
-----------
 
 - several conversion to DM_SERIAL and DM_I2C
 - fixes for Toradex boards
 - PSCI
 
 CI: https://source.denx.de/u-boot/custodians/u-boot-imx/-/pipelines/14965
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Merge tag 'u-boot-imx-20230201' of https://gitlab.denx.de/u-boot/custodians/u-boot-imx

For 2023.04
-----------

- several conversion to DM_SERIAL and DM_I2C
- fixes for Toradex boards
- PSCI

CI: https://source.denx.de/u-boot/custodians/u-boot-imx/-/pipelines/14965
2023-02-01 09:30:52 -05:00
John Keeping
519fa7aa25 power: act8846_pmic: fix number of registers
The highest register on ACT8846 is 0xf5, so set the number of registers
to 0xf6, ensuring that the pmic read/write commands are able to access
all of the supported registers (and many that are not valid, since the
register space is quite sparse).

Signed-off-by: John Keeping <john@metanate.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
2023-01-31 22:05:03 +09:00
Marek Vasut
910c7a881f pmic: pca9450: Make warm reset on WDOG_B assertion
The default configuration of the PMIC behavior makes the PMIC
power cycle most regulators on WDOG_B assertion. This power
cycling causes the memory contents of OCRAM to be lost.
Some systems neeeds some memory that survives reset and
reboot, therefore this patch is created.

The implementation is taken almost verbatim from Linux commit
2364a64d0673f ("regulator: pca9450: Make warm reset on WDOG_B assertion")

Signed-off-by: Marek Vasut <marex@denx.de>
Reviewed-by: Fabio Estevam <festevam@denx.de>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
2023-01-30 23:23:01 +01:00
Tom Rini
36b661dc91 Merge branch 'next' 2022-07-11 14:58:57 -04:00
Chris Morgan
30975fb73d rockchip: Add option to prevent booting on power plug-in
For Rockchip boards with the all rk8xx series PMICs (excluding the
rk808), it is sometimes desirable to not boot whenever the device is
plugged in. An example would be for the Odroid Go Advance.

This provides a configurable option to check the PMIC says it was
powered because of a plug-in event. If the value is 1 and this option
is selected, the device shuts down shortly after printing a message
to console stating the reason why it's shutting down. Powering up the
board with the power button is not affected.

This patch parallels the work done in the following patch series:
https://lore.kernel.org/u-boot/20220121133732.2397273-1-andre.przywara@arm.com/

Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
2022-06-29 11:42:10 +08:00
Tom Rini
24ec3dea4b arm: samsung: Migrate a number of symbols to Kconfig
- In a number of cases, use CONFIG_ARCH_EXYNOS[45] rather than
  CONFIG_EXYNOS[45]
- In other cases, test for CONFIG_ARCH_EXYNOS or CONFIG_ARCH_S5PC1XX
- Migrate specific SoC CONFIG values to Kconfig
- Use CONFIG_TARGET_x rather than CONFIG_x
- Migrate other CONFIG_EXYNOS_x symbols to Kconfig
- Reference CONFIG_EXYNOS_RELOCATE_CODE_BASE directly as EXYNOS_RELOCATE_CODE_BASE
- Rename CONFIG_S5P_PA_SYSRAM to CONFIG_SMP_PEN_ADDR to match the rest
  of U-Boot usage.

Cc: Minkyu Kang <mk7.kang@samsung.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
2022-06-28 17:04:37 -04:00
Patrick Delaunay
7171d99296 stm32mp: stpmic1: remove the debug unit request by debugger
Depending on backup register value, U-Boot SPL maintains the debug unit
powered-on for debugging purpose; only BUCK1 is required for powering
the debug unit, so revert the setting for all the other power lanes,
except BUCK3 that has to be always on.

To be functional this patch requires a modification in the debugger
,openocd for example, to update the STM32MP15 backup register when it is
required to debug SPL after reset. After deeper analysis this behavior
will be never supported in tools so the associated code, will be never
used and the associated code can be removed.

Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
2022-06-17 14:12:27 +02:00
Marek Vasut
326337fb00 pmic: pca9450: Add regulator driver
Add PCA9450 regulator driver. This is complementary driver for the BUCKn
and LDOn regulators provided by the PCA9450 PMIC driver. Currently the
driver permits reading the settngs and configuring the BUCKn and LDOn
regulators.

Reviewed-by: Fabio Estevam <festevam@denx.de>
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Fabio Estevam <festevam@denx.de>
Cc: Peng Fan <peng.fan@nxp.com>
Cc: Stefano Babic <sbabic@denx.de>
2022-05-20 12:36:48 +02:00
Neil Armstrong
b5cfa0c7ca power: add driver for the TPS65219 PMIC
The TPS65219 I2S PMIC features 3 Buck converters and 4 linear regulators,
2 GPOs, 1 GPIO, and 3 multi-function-pin.

This adds the PMIC driver, loading the regulator sub-nodes.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
2022-05-09 13:40:24 -04:00
Philip Oberfichtner
a194d59eec power: pfuze100: Add MEMx register definitions
Add missing MEMA - MEMD register definitions for PFUZE100.

Based on work from Heiko Schocher <hs@denx.de>.
Signed-off-by: Philip Oberfichtner <pro@denx.de>
2022-03-25 16:42:40 -04:00
Heinrich Schuchardt
185f812c41 doc: replace @return by Return:
Sphinx expects Return: and not @return to indicate a return value.

find . -name '*.c' -exec \
sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \;

find . -name '*.h' -exec \
sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \;

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
2022-01-19 18:11:34 +01:00
Simon Glass
9d8665b709 i2c: Convert CONFIG_POWER_I2C et al to Kconfig
This converts the following to Kconfig:
   CONFIG_POWER_I2C
   CONFIG_POWER_LEGACY

They are handled at the same time due to a dependency between them.
Update the Makefile rule to use legacy power only in U-Boot proper.
Unfortunately a separate rule is needed in SPL to be able to build
legacy power.  Add SPL related symbols for both, to allow for SPL-only
usage.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
[trini: More SPL related cleanups, reword commit message]
Signed-off-by: Tom Rini <trini@konsulko.com>
2021-09-04 12:26:02 -04:00
Simon Glass
29d7153ec3 power: Rename CONFIG_POWER to CONFIG_POWER_LEGACY
This option is used in pre-driver model code and much of it has never
been converted to driver model.

We want to add a new option to enable power support, so we can use a
simple rule in the Makefile. Rename this one, which is really about
a particular implementation of power.

Also update the pmic.h header file so it either includes the legacy
API or the driver model one.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
2021-09-04 12:26:02 -04:00
Gowtham Tammana
6fdbd2b093 power: pmic: tps65941: Add compatible for LP876441
TI J7200 EVM has lp876441 pmic that is similar to tps65941. Add support
for same with existing driver with new compatible.

Signed-off-by: Gowtham Tammana <g-tammana@ti.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
Link: https://lore.kernel.org/r/20210714205300.17424-2-g-tammana@ti.com
2021-07-15 17:56:04 +05:30
Stephan Gerhold
3f6e4ec7c3 power: pmic: Add driver for ST-Ericsson AB8500 via PRCMU
All devices based on ST-Ericsson Ux500 use a PMIC similar to AB8500
(Analog Baseband). There is AB8500, AB8505, AB9540 and AB8540
although in practice only AB8500 and AB8505 are relevant since the
platforms with AB9540 and AB8540 were cancelled and never used in
production.

In general, the AB8500 PMIC uses I2C as control interface, where the
different register banks are represented as separate I2C devices.
However, in practice AB8500 is always connected to a special I2C bus
on the DB8500 SoC that is controlled by the power/reset/clock
management unit (PRCMU) firmware.

Add a simple driver that allows reading/writing registers of the
AB8500 PMIC. The driver directly accesses registers from the PRCMU
parent device (represented by syscon in U-Boot). Abstracting it
further (e.g. with the i2c uclass) would not provide any advantage
because the PRCMU I2C bus is always just connected to AB8500 and
vice-versa.

The ab8500.h header is mostly taken as-is from Linux (with some
minor adjustments) to allow using similar code in both Linux and
U-Boot.

Cc: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
2021-07-14 16:48:14 -04:00
Konstantin Porotchkin
fec8c900c8 power: regulator: Add support for regulator-force-boot-off
Add support for regulator-force-boot-off DT property.
This property can be used by the board/device drivers for
turning off regulators on early init stages as pre-requisite
for the other components initialization.

Signed-off-by: Konstantin Porotchkin <kostap@marvell.com>
Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Jaehoon Chung <jh80.chung@samsung.com>
Cc: Simon Glass <sjg@chromium.org>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
2021-04-29 07:38:57 +02:00
Jaehoon Chung
67696abf1f power: pmic: remove pmic_max77696.c file
Remove pmic_max77696.c file.
The maintaining pmic_max77696.c file is useless.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
2021-04-12 14:25:30 -04:00
Peng Fan
4eeb9fe847 power: pca9450: add a new parameter for power_pca9450_init
Currently PCA9450 might have address 0x25 or 0x35, so let user
choose the address.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
2021-04-08 09:18:29 +02:00
Simon Glass
401d1c4f5d common: Drop asm/global_data.h from common header
Move this out of the common header and include it only where needed.  In
a number of cases this requires adding "struct udevice;" to avoid adding
another large header or in other cases replacing / adding missing header
files that had been pulled in, very indirectly.   Finally, we have a few
cases where we did not need to include <asm/global_data.h> at all, so
remove that include.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Rini <trini@konsulko.com>
2021-02-02 15:33:42 -05:00
Tim Harvey
2767d881f0 power: pmic: add driver for Monolithic Power mp5416
This adds basic register access and child regulator binding
for the Monolithic MP5416 Power Management IC which integrates
four DC/DC switching converters and five LDO regulators.

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
2021-01-18 15:23:06 -05:00
Simon Glass
8a8d24bdf1 dm: treewide: Rename ..._platdata variables to just ..._plat
Try to maintain some consistency between these variables by using _plat as
a suffix for them.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-12-13 16:51:09 -07:00
Simon Glass
caa4daa2ae dm: treewide: Rename 'platdata' variables to just 'plat'
We use 'priv' for private data but often use 'platdata' for platform data.
We can't really use 'pdata' since that is ambiguous (it could mean private
or platform data).

Rename some of the latter variables to end with 'plat' for consistency.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-12-13 16:51:08 -07:00
Simon Glass
a2703ce10c dm: Remove uses of device_bind_offset()
This function is not needed since the standard device_bind() can be used
instead.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-12-13 07:58:18 -07:00
Simon Glass
e12052b322 dm: core: Rename device_bind() to device_bind_offset()
This function is not necessary anymore, since device_bind_ofnode() does
the same thing and works with both flattree and livetree.

Rename it to indicate that it is special.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-12-13 07:58:17 -07:00
Peng Fan
16cc5ad0b4 power: regulator: add dummy helper
Add dummy helper to enabling the header could be included when
DM REGULATOR not enabled.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
2020-10-23 16:38:33 -04:00
Simon Glass
10552377d4 x86: apl: Add power-management definitions
Add SCI and power-state definitions required by ACPI tables. Fix the
license to match the original source file.

Als update the guard on acpi_pmc.h to avoid an error when buiding ASL.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-09-25 11:27:16 +08:00
Tom Rini
7c3cc6f106 Merge https://gitlab.denx.de/u-boot/custodians/u-boot-x86
- New timer API to allow delays with a 32-bit microsecond timer
- Add dynamic ACPI structs (DSDT/SSDT) generations to the DM core
- x86: Enable ACPI table generation by default
- x86: Enable the copy framebuffer on Coral
- x86: A few fixes to FSP2 with ApolloLake
- x86: Drop setup_pcat_compatibility()
- x86: Primary-to-Sideband Bus minor fixes
2020-07-17 08:04:48 -04:00
Simon Glass
11e27ae92b pmc: Move common registers to the header file
These registers need to be accesses from ACPI code, so move them to the
header file.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Wolfgang Wallner <wolfgang.wallner@br-automation.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2020-07-17 14:32:24 +08:00
Sébastien Szymanski
eefd93e7f8 power: pmic_pca9450: fix PCA9450A I2C address
Quoting Ye Li from NXP:

    "We have confirmed with PMIC team, 0x35 is used only on early chips
    and not used any more. 0x25 is the final address."

Fix it by merging power_pca9450a_init and power_pca9450b_init into one
function power_pca9450_init.

Signed-off-by: Sébastien Szymanski <sebastien.szymanski@armadeus.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Reviewed-by: Ye Li <ye.li@nxp.com>
2020-07-16 11:20:14 +02:00
Simon Glass
cd93d625fd common: Drop linux/bitops.h from common header
Move this uncommon header out of the common header.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-05-18 21:19:23 -04:00
Patrick Delaunay
e9a20f8a19 ram: stm32mp1: increase vdd2_ddr: buck2 for 32bits LPDDR
Need to increase the LPDDR2/LPDDR3 the voltage vdd2_ddr: buck2
form 1.2V to 1.25V for 32bits configuration.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Acked-by: Patrice Chotard <patrice.chotard@st.com>
2020-03-24 14:20:50 +01:00
Martin Fuzzey
7ae22d8479 power: regulator: add driver for Dialog DA9063 PMIC
Add a driver for the regulators in the the DA9063 PMIC.

Robert Beckett: move regulator modes to header so board code can set
modes. Correct mode mask used in ldo_set_mode.
Add an option CONFIG_SPL_DM_REGULATOR_DA9063.

Signed-off-by: Martin Fuzzey <martin.fuzzey@flowbird.group>
Signed-off-by: Robert Beckett <bob.beckett@collabora.com>
2020-01-27 19:54:20 -05:00
Martin Fuzzey
483880c490 power: pmic: add driver for Dialog DA9063 PMIC
This adds the basic register access operations and child regulator
binding (if a regulator driver exists).

Robert Beckett: simplify accesses by using bottom bit of address as
offset overflow. This avoids the need to track which page we are on.
Add an option CONFIG_SPL_DM_PMIC_DA9063.

Signed-off-by: Martin Fuzzey <martin.fuzzey@flowbird.group>
Signed-off-by: Robert Beckett <bob.beckett@collabora.com>
2020-01-27 19:54:20 -05:00
Tom Rini
deb287b561 ---------------------------------------------------------------------
Add i.MX8MP SoC and EVK board
 Update README for i.MX8MN EVK and fix mmc env
 Add pca9450 driver
 --------------------------------------------------------------------
 
 Travis: https://travis-ci.org/sbabic/u-boot-imx/builds/634211885
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Merge tag 'u-boot-imx-20200108' of https://gitlab.denx.de/u-boot/custodians/u-boot-imx

---------------------------------------------------------------------
Add i.MX8MP SoC and EVK board
Update README for i.MX8MN EVK and fix mmc env
Add pca9450 driver
--------------------------------------------------------------------

Travis: https://travis-ci.org/sbabic/u-boot-imx/builds/634211885
2020-01-08 15:24:50 -05:00
Ye Li
22172f6b7f power: Add new PMIC PCA9450 driver
PCA9450 PMIC series is used to support iMX8MM (PCA9450A) and
iMX8MN (PCA9450B). Add the PMIC driver for both PCA9450A and PCA9450B.

Signed-off-by: Robin Gong <yibin.gong@nxp.com>
Signed-off-by: Ye Li <ye.li@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
2020-01-08 13:20:08 +01:00
Simon Glass
6c6d88e142 x86: power: Add an ACPI PMC uclass
Intel x86 SoCs have a power manager/controller which handles several
power-related aspects of the platform. Add a uclass for this, with a few
useful operations.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2019-12-15 11:44:10 +08:00
Vasily Khoruzhick
5ef1e02e99 power: fan53555: add support for Silergy SYR82X and SYR83X
SYR82X and SYR83X are almost identical to FAN53555, the only difference
is different die ID and revision, voltage ranges and steps.

Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com>
Tested-by: Anand Moon <linux.amoon@gmail.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
2019-11-23 22:29:49 +08:00
Tom Rini
086e391bc4 Merge tag 'u-boot-rockchip-20191110' of https://gitlab.denx.de/u-boot/custodians/u-boot-rockchip
- Add support for rockchip pmic rk805,rk809, rk816, rk817
- Add rk3399 board Leez support
- Fix bug in rk3328 ram driver
- Adapt SPL to support ATF bl31 with entry at 0x40000
- Fix the u8 type comparision with '-1'.
- Fix checkpatch warning for multi blank line and review signature.
2019-11-11 14:19:32 -05:00
Joseph Chen
ee30068fa5 power: pmic: rk809: support rk809 pmic
The RK809 is a Power Management IC (PMIC) for multimedia
and handheld devices. They contains the following components:
    - Regulators(5*BUCKs, 9*LDOs, 2*SWITCHes)
    - RTC
    - Clocking

Signed-off-by: Joseph Chen <chenjh@rock-chips.com>
Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
2019-11-10 20:34:10 +08:00
Joseph Chen
b4a35574b3 power: pmic: rk817: support rk817 pmic
The RK817 is a Power Management IC (PMIC) for multimedia
and handheld devices. They contains the following components:
    - Regulators(4*BUCKs, 1* BOOST, 9*LDOs, 1*SWITCH)
    - RTC
    - Clocking

Signed-off-by: Joseph Chen <chenjh@rock-chips.com>
Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
2019-11-10 20:33:52 +08:00
Elaine Zhang
b62280745e power: pmic: rk805: support rk805 pmic
The RK805 are a Power Management IC (PMIC) for multimedia
and handheld devices. They contains the following components:
    - Regulators(4*BUCKs, 3*LDOs)
    - RTC
    - Clocking

Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
2019-11-10 20:32:51 +08:00
Elaine Zhang
addd062bea power: pmic: rk816: support rk816 pmic
The RK816 is a Power Management IC (PMIC) for multimedia
and handheld devices. They contains the following components:
    - Regulators(4*BUCKs, 1*BOOST, 6*LDOs, 1*SWITCH)
    - RTC
    - Clocking

Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
2019-11-10 20:32:41 +08:00
Joseph Chen
11406b8f7e dm: regulator: support regulator more state
support parse regulator standard property:
regulator-off-in-suspend;
regulator-init-microvolt;
regulator-suspend-microvolt:
 regulator_get_suspend_enable
 regulator_set_suspend_enable
 regulator_get_suspend_value
 regulator_set_suspend_value

Signed-off-by: Joseph Chen <chenjh@rock-chips.com>
Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
2019-11-10 20:31:09 +08:00
Keerthy
6b86dd0c1e power: pmic: tps65941: Add support for tps65941 family of PMICs
Add support to bind the regulators/child nodes with the pmic.

Signed-off-by: Keerthy <j-keerthy@ti.com>
2019-11-07 18:39:16 -05:00
Patrick Delaunay
234a60244c pmu: stpmic1: change specific NVM api to MISC
Use MISC u-class to export the NVM register (starting at 0xF8 offset)
and avoid specific API.
- SHADOW have offset < 0.
- NVM have register > 0

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
2019-08-27 11:19:23 +02:00
Patrick Delaunay
178a415534 stpmic1: program pmic to keep only the debug unit on
Depending on backup register value, we maintain the debug unit
powered-on for debugging purpose.
Only BUCK1 is required for powering the debug unit, so revert
the setting for all the other power lanes, except BUCK3 that
has to be always on.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
2019-08-27 09:36:56 +02:00
Matti Vaittinen
21b02414f1 regulator: bd718x7: support ROHM BD71837 and BD71847 PMICs
BD71837 and BD71847 is PMIC intended for powering single-core,
dual-core, and quad-core SoC’s such as NXP-i.MX 8M. BD71847
is used for example on NXP imx8mm EVK.

Add regulator driver for ROHM BD71837 and BD71847 PMICs.
BD71837 contains 8 bucks and 7 LDOS. BD71847 is reduced
version containing 6 bucks and 6 LDOs. Voltages for DVS
bucks (1-4 on BD71837, 1 and 2 on BD71847) can be adjusted
when regulators are enabled. For other bucks and LDOs we may
have over- or undershooting if voltage is adjusted when
regulator is enabled. Thus this is prevented by default.

BD718x7 has a quirk which may leave power output disabled
after reset if enable/disable state was controlled by SW.
Thus the SW control is only allowed for BD71837  bucks
3 and 4 by default. The impact of this limitation must be
evaluated board-by board and restrictions may need to be
modified. (Linux driver get's these limitations from DT and we
may want to implement same on u-Boot driver).

Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2019-07-19 15:18:47 +02:00