diff mbox series

[v2,03/17] arm64: dts: mediatek: mt6795: xperia-m5: Enable Frequency Hopping

Message ID 20230327083647.22017-4-angelogioacchino.delregno@collabora.com (mailing list archive)
State New, archived
Headers show
Series MT6795 Helio X10 and Sony Xperia M5: DT step 2! | expand

Commit Message

AngeloGioacchino Del Regno March 27, 2023, 8:36 a.m. UTC 
Enable FHCTL with Spread Spectrum for MAINPLL, MPLL and MSDCPLL
as found on the downstream kernel for this smartphone.
Which one to enable, and at what SSC percentage, was found by
dumping the debugging data from a running downstream kernel and
checking the downstream code.

/proc/freqhopping # cat status
FH status:
===============================================
id == fh_status == pll_status == setting_id == curr_freq == user_defined
 0           0             1             0      1599000         0
 1           0             1             0      1716000         0
 2           1             1             2      1092000         0
 3           1             1             2      2912000         0
 4           1             0             2      1600000         0
 5           0             0             0            0         0
 6           0             1             0      1518002         0
 7           0             0             0            0         0
 8           0             0             0            0         0

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
---
 arch/arm64/boot/dts/mediatek/mt6795-sony-xperia-m5.dts | 7 +++++++
 1 file changed, 7 insertions(+)
diff mbox series

Patch

diff --git a/arch/arm64/boot/dts/mediatek/mt6795-sony-xperia-m5.dts b/arch/arm64/boot/dts/mediatek/mt6795-sony-xperia-m5.dts
index d3415527d389..52ce3284a46f 100644
--- a/arch/arm64/boot/dts/mediatek/mt6795-sony-xperia-m5.dts
+++ b/arch/arm64/boot/dts/mediatek/mt6795-sony-xperia-m5.dts
@@ -48,6 +48,13 @@  bootloader-region@46000000 {
 	};
 };
 
+&fhctl {
+	clocks = <&apmixedsys CLK_APMIXED_MAINPLL>, <&apmixedsys CLK_APMIXED_MPLL>,
+		 <&apmixedsys CLK_APMIXED_MSDCPLL>;
+	mediatek,hopping-ssc-percent = <8>, <5>, <8>;
+	status = "okay";
+};
+
 &pio {
 	uart0_pins: uart0-pins {
 		pins-rx {