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| author | Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com> | 2019-05-07 10:45:55 +0300 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2019-07-19 16:18:47 +0300 |
| commit | 21b02414f109e06f20c0718747187383b982ed88 (patch) | |
| tree | 5cbeab3bf9064fceab98c7a258ccade4c82a9b4f /board | |
| parent | d70c0fce6719d55750540bd46ed254197fbdc4c0 (diff) | |
| download | u-boot-21b02414f109e06f20c0718747187383b982ed88.tar.xz | |
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>
Diffstat (limited to 'board')
0 files changed, 0 insertions, 0 deletions