ipq40xx: fix apss cpu overclocking spam

There's an interaction issue between the clk changes:"
clk: qcom: ipq4019: Add the apss cpu pll divider clock node
clk: qcom: ipq4019: remove fixed clocks and add pll clocks
" and the cpufreq-dt.

cpufreq-dt is now spamming the kernel-log with the following:

[ 1099.190658] cpu cpu0: dev_pm_opp_set_rate: failed to find current OPP
for freq 761142857 (-34)

This only happens on certain devices like the Compex WPJ428
and AVM FritzBox!4040. However, other devices like the Asus
RT-AC58U and Meraki MR33 work just fine.

The issue stem from the fact that all higher CPU-Clocks
are achieved by switching the clock-parent to the P_DDRPLLAPSS
(ddrpllapss). Which is set by Qualcomm's proprietary bootcode
as part of the DDR calibration.

For example, the FB4040 uses 256 MiB Nanya NT5CC128M16IP clocked
at round 533 MHz (ddrpllsdcc = 190285714 Hz).

whereas the 128 MiB Nanya NT5CC64M16GP-DI in the ASUS RT-AC58U is
clocked at a slightly higher 537 MHz ( ddrpllsdcc = 192000000 Hz).

Signed-off-by: Christian Lamparter <chunkeey@gmail.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/target/linux/ipq40xx/patches-4.14/017-qcom-ipq4019-add-cpu-operating-points-for-cpufreq-su.patch b/target/linux/ipq40xx/patches-4.14/017-qcom-ipq4019-add-cpu-operating-points-for-cpufreq-su.patch
index 138a2dd8b2..03e9021a42 100644
--- a/target/linux/ipq40xx/patches-4.14/017-qcom-ipq4019-add-cpu-operating-points-for-cpufreq-su.patch
+++ b/target/linux/ipq40xx/patches-4.14/017-qcom-ipq4019-add-cpu-operating-points-for-cpufreq-su.patch
@@ -69,8 +69,8 @@ Signed-off-by: Matthew McClintock <mmcclint@codeaurora.org>
 +			opp-hz = /bits/ 64 <500000000>;
 +			clock-latency-ns = <256000>;
 +		};
-+		opp-716800000 {
-+			opp-hz = /bits/ 64 <716800000>;
++		opp-716000000 {
++			opp-hz = /bits/ 64 <716000000>;
 +			clock-latency-ns = <256000>;
  		};
  	};