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b5a76cb38d
Currently, we limited the voltages from the PMIC very strictly. This
causes an issue with one Toradex SKU that uses a consumer-grade chip
that is capable of going up to 1.8GHz at 1.00V.
Extend the ranges to min/max values of the SoC operating ranges (table
10) in the datasheet. Detailed explanation as follows:
BUCK2:
- As already described above, the SKU with the consumer-grade chip
needs a voltage of at least 1.00V. 1.05V is chosen now as this is
listed as the maximum. Both industrial and consumer-grade chips have
an absolute maximum rating of 1.15V which makes it still safe to put
1.05V
- Lower the regulator-min value to the smallest value allowed from the
Quad-A53, 1.2GHz version of the SoC
BUCK3:
- This regulator is used for SoC input voltages VDD_GPU, VDD_VPU and
VDD_DRAM.
- Use the smallest value of these three inputs as the regulator-min
- Use the largest value of these three inputs as the regulator-max
LDO2:
- This LDO is used for VDD_SNVS_0P8 SoC input voltage. As this has a
single nominal input voltage just put this in the middle of 0.8V.
Fixes: 6a57f224f7 ("arm64: dts: freescale: add initial support for verdin imx8m mini")
Signed-off-by: Philippe Schenker <philippe.schenker@toradex.com>
Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.