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linux-next/Documentation/devicetree/bindings/phy/phy-stih407-usb.txt
Peter Griffin 5402d927ae phy: phy-stih407-usb: Pass sysconfig register offsets via syscfg property.
Based on Arnds review comments here https://lkml.org/lkml/2014/11/13/161,
update the phy driver to not use the reg property to access the sysconfig
register offsets.

This is because other phy's (miphy28, miphy365) have a combination of
memory mapped registers and sysconfig control regs, and we shouldn't
be mixing address spaces in the reg property. In addition we would
ideally like the sysconfig offsets to be passed via DT in a uniform way.

This new method will also allow us to support devices which have sysconfig
registers in different banks more easily and it is also analagous to how
keystone and bcm7745 platforms pass there syscon offsets in DT.

This breaks DT compatibility, but this platform is considered WIP, and
is only used by a few developers who are upstreaming support for it.

Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Maxime Coquelin <maxime.coquelin@st.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
2015-01-21 15:23:06 +05:30

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ST STiH407 USB PHY controller
This file documents the dt bindings for the usb picoPHY driver which is the PHY for both USB2 and USB3
host controllers (when controlling usb2/1.1 devices) available on STiH407 SoC family from STMicroelectronics.
Required properties:
- compatible : should be "st,stih407-usb2-phy"
- st,syscfg : phandle of sysconfig bank plus integer array containing phyparam and phyctrl register offsets
- resets : list of phandle and reset specifier pairs. There should be two entries, one
for the whole phy and one for the port
- reset-names : list of reset signal names. Should be "global" and "port"
See: Documentation/devicetree/bindings/reset/st,sti-powerdown.txt
See: Documentation/devicetree/bindings/reset/reset.txt
Example:
usb2_picophy0: usbpicophy@f8 {
compatible = "st,stih407-usb2-phy";
#phy-cells = <0>;
st,syscfg = <&syscfg_core 0x100 0xf4>;
resets = <&softreset STIH407_PICOPHY_SOFTRESET>,
<&picophyreset STIH407_PICOPHY0_RESET>;
reset-names = "global", "port";
};