| Message ID | 20201128142839.517949-2-paul.kocialkowski@bootlin.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Allwinner MIPI CSI-2 support for A31/V3s/A83T | expand |
On Sat, Nov 28, 2020 at 03:28:21PM +0100, Paul Kocialkowski wrote: > Besides giving pointers to the relevant functions for PHY mode and > submode configuration, this clarifies the need to set them before > powering on the PHY. > > Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com> Reviewed-by: Maxime Ripard <mripard@kernel.org> Maxime
diff --git a/Documentation/driver-api/phy/phy.rst b/Documentation/driver-api/phy/phy.rst index 8fc1ce0bb905..6cbc72707a49 100644 --- a/Documentation/driver-api/phy/phy.rst +++ b/Documentation/driver-api/phy/phy.rst @@ -195,3 +195,21 @@ DeviceTree Binding The documentation for PHY dt binding can be found @ Documentation/devicetree/bindings/phy/phy-bindings.txt + +PHY Mode and Submode +==================== + +Once a reference to a PHY is obtained by a controller, the PHY can be configured +to a PHY mode and submode. PHY modes are described in the `phy_mode` enum while +submodes are specific to the selected PHY mode. + +Mode and submode configuration is done by calling:: + + int phy_set_mode_ext(struct phy *phy, enum phy_mode mode, int submode); + +If no submode is to be configured, users can call:: + + int phy_set_mode(struct phy *phy, enum phy_mode mode); + +The PHY mode and submode must not be configured after the PHY has already been +powered on.
Besides giving pointers to the relevant functions for PHY mode and submode configuration, this clarifies the need to set them before powering on the PHY. Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com> --- Documentation/driver-api/phy/phy.rst | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+)