openwrt/target/linux/ipq806x
Shane Synan 9baca41064 ipq806x: fix min<>target opp-microvolt DTS mixup
Rearrange all voltage triplets for "opp_table0" to match the
specifications.  "opp-microvolt" and "opp-microvolt-<name>" triplets
are in order of <target min max>, and NOT <min target max>.

Previously, the CPU would *always* spend its time at the "minimum"
voltage, ignoring the actual intended target.  This is a regression
from previous behavior.

On an NBG6817 with a Qualcomm CPU of PVS bin #2...
(see &opp_table0 -> opp-1725000000 -> opp-microvolt-speed0-pvs2-v0)

* Before:
/usr/bin/tail -n +1 /sys/kernel/debug/opp/cpu0/opp\:1725000000/supply-0/u_volt_*
==> /sys/kernel/debug/opp/cpu0/opp:1725000000/supply-0/u_volt_max <==
1260000

==> /sys/kernel/debug/opp/cpu0/opp:1725000000/supply-0/u_volt_min <==
1200000

==> /sys/kernel/debug/opp/cpu0/opp:1725000000/supply-0/u_volt_target <==
1140000

* After:
/usr/bin/tail -n +1 /sys/kernel/debug/opp/cpu0/opp\:1725000000/supply-0/u_volt_*
==> /sys/kernel/debug/opp/cpu0/opp:1725000000/supply-0/u_volt_max <==
1260000

==> /sys/kernel/debug/opp/cpu0/opp:1725000000/supply-0/u_volt_min <==
1140000

==> /sys/kernel/debug/opp/cpu0/opp:1725000000/supply-0/u_volt_target <==
1200000

To check voltages and frequencies at run time, use...
/bin/cat /sys/kernel/debug/regulator/regulator_summary &&
  /bin/cat /sys/kernel/debug/clk/clk_summary | grep "hfpll"

See
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tree/Documentation/devicetree/bindings/opp/opp.txt?h=v5.4.142#n91

Fixes: 1e25423be8 ("ipq806x: refresh dtsi patches")

Signed-off-by: Shane Synan <digitalcircuit36939@gmail.com>
Reviewed-by: Ansuel Smith <ansuelsmth@gmail.com>
[commit message style cleanup, another kernel refresh]
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
2021-08-21 23:54:31 +02:00
..
base-files ipq806x: fix LAN and WAN port assignments on TP-Link AD7200 2021-06-06 00:26:13 +02:00
files/arch/arm/boot/dts ipq806x: fix min<>target opp-microvolt DTS mixup 2021-08-21 23:54:31 +02:00
generic ipqx0xx: add Generic subtarget 2019-08-22 21:15:28 +02:00
image treewide: call check-size before append-metadata 2021-07-10 19:40:10 +02:00
patches-5.4 ipq806x: fix dedicated cpufreq driver 2021-06-30 23:14:43 +02:00
patches-5.10 ipq806x: fix min<>target opp-microvolt DTS mixup 2021-08-21 23:54:31 +02:00
config-5.4 ipq806x: refresh config for kernel 5.4 2021-06-28 01:06:08 +02:00
config-5.10 ipq806x: refresh config 5.10 2021-05-07 07:05:16 +02:00
Makefile ipq806x: add kernel 5.10 as testing kernel 2021-05-07 07:05:16 +02:00
modules.mk kernel: usb: move phy-qcom-ipq806x-usb to ipq806x modules.mk 2020-08-13 02:12:12 +02:00