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

[AngeloGioacchino Del Regno]

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 at collabora.com>
---
 arch/arm64/boot/dts/mediatek/mt6795-sony-xperia-m5.dts | 7 +++++++
 1 file changed, 7 insertions(+)

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 at 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 {
-- 
2.40.0