1 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
4 $id: http://devicetree.org/schemas/phy/phy-stm32-usbphyc.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: STMicroelectronics STM32 USB HS PHY controller binding
11 The STM32 USBPHYC block contains a dual port High Speed UTMI+ PHY and a UTMI
12 switch. It controls PHY configuration and status, and the UTMI+ switch that
13 selects either OTG or HOST controller for the second PHY port. It also sets
19 |_ PHY port#1 _________________ HOST controller
21 | / 1|________________|
22 |_ PHY port#2 ----| |________________
24 |_ UTMI switch_______| OTG controller
27 - Amelie Delaunay <amelie.delaunay@foss.st.com>
31 const: st,stm32mp1-usbphyc
49 description: regulator providing 1V1 power supply to the PLL block
52 description: regulator providing 1V8 power supply to the PLL block
55 description: number of clock cells for ck_usbo_48m consumer
58 #Required child nodes:
64 Each port the controller provides must be represented as a sub-node.
68 description: phy port index.
72 description: regulator providing 3V3 power supply to the PHY.
79 $ref: /schemas/connector/usb-connector.yaml
80 unevaluatedProperties: false
85 # It can be necessary to adjust the PHY settings to compensate parasitics, which can be due
86 # to USB connector/receptacle, routing, ESD protection component,... Here is the list of
87 # all optional parameters to tune the interface of the PHY (HS for High-Speed, FS for Full-
88 # Speed, LS for Low-Speed)
90 st,current-boost-microamp:
91 description: Current boosting in uA
95 description: Disables the LS/FS feedback capacitor
98 st,decrease-hs-slew-rate:
99 description: Decreases the HS driver slew rate by 10%
104 Tunes the HS driver DC level
106 - <1> increases the level by 5 to 7 mV
107 - <2> increases the level by 10 to 14 mV
108 - <3> decreases the level by 5 to 7 mV
109 $ref: /schemas/types.yaml#/definitions/uint32
114 st,enable-fs-rftime-tuning:
115 description: Enables the FS rise/fall tuning option
118 st,enable-hs-rftime-reduction:
119 description: Enables the HS rise/fall reduction feature
124 Controls HS driver current trimming for choke compensation
125 - <0> = 18.87 mA target current / nominal + 0%
126 - <1> = 19.165 mA target current / nominal + 1.56%
127 - <2> = 19.46 mA target current / nominal + 3.12%
128 - <3> = 19.755 mA target current / nominal + 4.68%
129 - <4> = 20.05 mA target current / nominal + 6.24%
130 - <5> = 20.345 mA target current / nominal + 7.8%
131 - <6> = 20.64 mA target current / nominal + 9.36%
132 - <7> = 20.935 mA target current / nominal + 10.92%
133 - <8> = 21.23 mA target current / nominal + 12.48%
134 - <9> = 21.525 mA target current / nominal + 14.04%
135 - <10> = 21.82 mA target current / nominal + 15.6%
136 - <11> = 22.115 mA target current / nominal + 17.16%
137 - <12> = 22.458 mA target current / nominal + 19.01%
138 - <13> = 22.755 mA target current / nominal + 20.58%
139 - <14> = 23.052 mA target current / nominal + 22.16%
140 - <15> = 23.348 mA target current / nominal + 23.73%
141 $ref: /schemas/types.yaml#/definitions/uint32
146 st,trim-hs-impedance:
148 Controls HS driver impedance tuning for choke compensation
149 - <0> = no impedance offset
150 - <1> = reduce the impedance by 2 ohms
151 - <2> = reduce the impedance by 4 ohms
152 - <3> = reduce the impedance by 6 ohms
153 $ref: /schemas/types.yaml#/definitions/uint32
158 st,tune-squelch-level:
160 Tunes the squelch DC threshold value
161 - <0> = no shift in threshold
162 - <1> = threshold shift by +7 mV
163 - <2> = threshold shift by -5 mV
164 - <3> = threshold shift by +14 mV
165 $ref: /schemas/types.yaml#/definitions/uint32
170 st,enable-hs-rx-gain-eq:
171 description: Enables the HS Rx gain equalizer
174 st,tune-hs-rx-offset:
176 Adjusts the HS Rx offset
178 - <1> = offset of +5 mV
179 - <2> = offset of +10 mV
180 - <3> = offset of -5 mV
181 $ref: /schemas/types.yaml#/definitions/uint32
187 description: Disables the HS fall time control of single ended signals during pre-emphasis
191 description: Disables the short circuit protection in LS/FS driver
194 st,enable-hs-tx-staggering:
195 description: Enables the basic staggering in HS Tx mode
212 The value is used to select UTMI switch output.
213 0 for OTG controller and 1 for Host controller.
220 additionalProperties: false
233 additionalProperties: false
237 #include <dt-bindings/clock/stm32mp1-clks.h>
238 #include <dt-bindings/reset/stm32mp1-resets.h>
239 usbphyc: usbphyc@5a006000 {
240 compatible = "st,stm32mp1-usbphyc";
241 reg = <0x5a006000 0x1000>;
242 clocks = <&rcc USBPHY_K>;
243 resets = <&rcc USBPHY_R>;
244 vdda1v1-supply = <®11>;
245 vdda1v8-supply = <®18>;
246 #address-cells = <1>;
250 usbphyc_port0: usb-phy@0 {
252 phy-supply = <&vdd_usb>;
254 st,tune-hs-dc-level = <2>;
255 st,enable-fs-rftime-tuning;
256 st,enable-hs-rftime-reduction;
257 st,trim-hs-current = <15>;
258 st,trim-hs-impedance = <1>;
259 st,tune-squelch-level = <3>;
260 st,tune-hs-rx-offset = <2>;
263 compatible = "usb-a-connector";
264 vbus-supply = <&vbus_sw>;
268 usbphyc_port1: usb-phy@1 {
270 phy-supply = <&vdd_usb>;
272 st,tune-hs-dc-level = <2>;
273 st,enable-fs-rftime-tuning;
274 st,enable-hs-rftime-reduction;
275 st,trim-hs-current = <15>;
276 st,trim-hs-impedance = <1>;
277 st,tune-squelch-level = <3>;
278 st,tune-hs-rx-offset = <2>;