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ARM: dts: stm32: tune the HS USB PHYs on stm32mp157c-ev1

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This patch adds phy tuning parameters for usbphyc port0 (USBH controller)
and usbphyc port1 (OTG controller).
Phy tuning parameters are used to adjust the phy settings to compensate
parasitics, which can be due to USB receptacle, routing, and ESD protection
component.

Signed-off-by: Amelie Delaunay <amelie.delaunay@foss.st.com>
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
Signed-off-by: Alexandre Torgue <alexandre.torgue@foss.st.com>
This commit is contained in:
Fabrice Gasnier 2021-10-25 17:17:50 +02:00 committed by Alexandre Torgue
parent 2312a6e7b3
commit 28f645fc94
1 changed files with 22 additions and 0 deletions
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22
arch/arm/boot/dts/stm32mp157c-ev1.dts
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@ -375,3 +375,25 @@ &usbotg_hs {
&usbphyc {
status = "okay";
};
&usbphyc_port0 {
st,tune-hs-dc-level = <2>;
st,enable-fs-rftime-tuning;
st,enable-hs-rftime-reduction;
st,trim-hs-current = <15>;
st,trim-hs-impedance = <1>;
st,tune-squelch-level = <3>;
st,tune-hs-rx-offset = <2>;
st,no-lsfs-sc;
};
&usbphyc_port1 {
st,tune-hs-dc-level = <2>;
st,enable-fs-rftime-tuning;
st,enable-hs-rftime-reduction;
st,trim-hs-current = <15>;
st,trim-hs-impedance = <1>;
st,tune-squelch-level = <3>;
st,tune-hs-rx-offset = <2>;
st,no-lsfs-sc;
};