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linux/arch/arm64/boot
Philippe Schenker b5a76cb38d arm64: dts: imx8mm-verdin: extend pmic voltages
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>
2022-09-06 10:05:18 +08:00
..
dts arm64: dts: imx8mm-verdin: extend pmic voltages 2022-09-06 10:05:18 +08:00
.gitignore
install.sh kbuild: factor out the common installation code into scripts/install.sh 2022-05-11 21:45:53 +09:00
Makefile arm64: boot: add zstd support 2022-06-23 18:33:30 +01:00