€•q      Œsphinx.addnodes”Œdocument”“”)”}”(Œ	rawsource”Œ ”Œchildren”]”(Œtranslations”ŒLanguagesNode”“”)”}”(hhh]”(h Œpending_xref”“”)”}”(hhh]”Œdocutils.nodes”ŒText”“”ŒChinese (Simplified)”…””}”Œparent”hsbaŒ
attributes”}”(Œids”]”Œclasses”]”Œnames”]”Œdupnames”]”Œbackrefs”]”Œ	refdomain”Œstd”Œreftype”Œdoc”Œ	reftarget”Œ&/translations/zh_CN/driver-api/phy/phy”Œmodname”NŒ	classname”NŒrefexplicit”ˆuŒtagname”hhhubh)”}”(hhh]”hŒChinese (Traditional)”…””}”hh2sbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ&/translations/zh_TW/driver-api/phy/phy”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒItalian”…””}”hhFsbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ&/translations/it_IT/driver-api/phy/phy”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒJapanese”…””}”hhZsbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ&/translations/ja_JP/driver-api/phy/phy”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒKorean”…””}”hhnsbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ&/translations/ko_KR/driver-api/phy/phy”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒSpanish”…””}”hh‚sbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ&/translations/sp_SP/driver-api/phy/phy”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubeh}”(h]”h ]”h"]”h$]”h&]”Œcurrent_language”ŒEnglish”uh1h
hhŒ	_document”hŒsource”NŒline”NubhŒsection”“”)”}”(hhh]”(hŒtitle”“”)”}”(hŒPHY subsystem”h]”hŒPHY subsystem”…””}”(hh¨hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¦hh£hžhhŸŒ@/var/lib/git/docbuild/linux/Documentation/driver-api/phy/phy.rst”h KubhŒ
field_list”“”)”}”(hhh]”hŒfield”“”)”}”(hhh]”(hŒ
field_name”“”)”}”(hŒAuthor”h]”hŒAuthor”…””}”(hhÃhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hÁhh¾hŸh¶h K ubhŒ
field_body”“”)”}”(hŒ'Kishon Vijay Abraham I <kishon@ti.com>
”h]”hŒ	paragraph”“”)”}”(hŒ&Kishon Vijay Abraham I <kishon@ti.com>”h]”(hŒKishon Vijay Abraham I <”…””}”(hhÙhžhhŸNh NubhŒ	reference”“”)”}”(hŒkishon@ti.com”h]”hŒkishon@ti.com”…””}”(hhãhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”Œrefuri”Œmailto:kishon@ti.com”uh1háhhÙubhŒ>”…””}”(hhÙhžhhŸNh Nubeh}”(h]”h ]”h"]”h$]”h&]”uh1h×hŸh¶h KhhÓubah}”(h]”h ]”h"]”h$]”h&]”uh1hÑhh¾ubeh}”(h]”h ]”h"]”h$]”h&]”uh1h¼hŸh¶h Khh¹hžhubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hh£hžhhŸh¶h KubhØ)”}”(hŒ^This document explains the Generic PHY Framework along with the APIs provided,
and how-to-use.”h]”hŒ^This document explains the Generic PHY Framework along with the APIs provided,
and how-to-use.”…””}”(hj  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h×hŸh¶h Khh£hžhubh¢)”}”(hhh]”(h§)”}”(hŒIntroduction”h]”hŒIntroduction”…””}”(hj   hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¦hj  hžhhŸh¶h KubhØ)”}”(hXÍ  *PHY* is the abbreviation for physical layer. It is used to connect a device
to the physical medium e.g., the USB controller has a PHY to provide functions
such as serialization, de-serialization, encoding, decoding and is responsible
for obtaining the required data transmission rate. Note that some USB
controllers have PHY functionality embedded into it and others use an external
PHY. Other peripherals that use PHY include Wireless LAN, Ethernet,
SATA etc.”h]”(hŒemphasis”“”)”}”(hŒ*PHY*”h]”hŒPHY”…””}”(hj4  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1j2  hj.  ubhXÈ   is the abbreviation for physical layer. It is used to connect a device
to the physical medium e.g., the USB controller has a PHY to provide functions
such as serialization, de-serialization, encoding, decoding and is responsible
for obtaining the required data transmission rate. Note that some USB
controllers have PHY functionality embedded into it and others use an external
PHY. Other peripherals that use PHY include Wireless LAN, Ethernet,
SATA etc.”…””}”(hj.  hžhhŸNh Nubeh}”(h]”h ]”h"]”h$]”h&]”uh1h×hŸh¶h Khj  hžhubhØ)”}”(hŒ±The intention of creating this framework is to bring the PHY drivers spread
all over the Linux kernel to drivers/phy to increase code re-use and for
better code maintainability.”h]”hŒ±The intention of creating this framework is to bring the PHY drivers spread
all over the Linux kernel to drivers/phy to increase code re-use and for
better code maintainability.”…””}”(hjL  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h×hŸh¶h Khj  hžhubhØ)”}”(hŒ~This framework will be of use only to devices that use external PHY (PHY
functionality is not embedded within the controller).”h]”hŒ~This framework will be of use only to devices that use external PHY (PHY
functionality is not embedded within the controller).”…””}”(hjZ  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h×hŸh¶h Khj  hžhubeh}”(h]”Œintroduction”ah ]”h"]”Œintroduction”ah$]”h&]”uh1h¡hh£hžhhŸh¶h Kubh¢)”}”(hhh]”(h§)”}”(hŒ*Registering/Unregistering the PHY provider”h]”hŒ*Registering/Unregistering the PHY provider”…””}”(hjs  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¦hjp  hžhhŸh¶h KubhØ)”}”(hX‡  PHY provider refers to an entity that implements one or more PHY instances.
For the simple case where the PHY provider implements only a single instance of
the PHY, the framework provides its own implementation of of_xlate in
of_phy_simple_xlate. If the PHY provider implements multiple instances, it
should provide its own implementation of of_xlate. of_xlate is used only for
dt boot case.”h]”hX‡  PHY provider refers to an entity that implements one or more PHY instances.
For the simple case where the PHY provider implements only a single instance of
the PHY, the framework provides its own implementation of of_xlate in
of_phy_simple_xlate. If the PHY provider implements multiple instances, it
should provide its own implementation of of_xlate. of_xlate is used only for
dt boot case.”…””}”(hj  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h×hŸh¶h Khjp  hžhubhŒliteral_block”“”)”}”(hX%  #define of_phy_provider_register(dev, xlate)    \
        __of_phy_provider_register((dev), NULL, THIS_MODULE, (xlate))

#define devm_of_phy_provider_register(dev, xlate)       \
        __devm_of_phy_provider_register((dev), NULL, THIS_MODULE,
                                        (xlate))”h]”hX%  #define of_phy_provider_register(dev, xlate)    \
        __of_phy_provider_register((dev), NULL, THIS_MODULE, (xlate))

#define devm_of_phy_provider_register(dev, xlate)       \
        __devm_of_phy_provider_register((dev), NULL, THIS_MODULE,
                                        (xlate))”…””}”hj‘  sbah}”(h]”h ]”h"]”h$]”h&]”Œ	xml:space”Œpreserve”uh1j  hŸh¶h K(hjp  hžhubhØ)”}”(hX  of_phy_provider_register and devm_of_phy_provider_register macros can be used to
register the phy_provider and it takes device and of_xlate as
arguments. For the dt boot case, all PHY providers should use one of the above
2 macros to register the PHY provider.”h]”hX  of_phy_provider_register and devm_of_phy_provider_register macros can be used to
register the phy_provider and it takes device and of_xlate as
arguments. For the dt boot case, all PHY providers should use one of the above
2 macros to register the PHY provider.”…””}”(hj¡  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h×hŸh¶h K/hjp  hžhubhØ)”}”(hX{  Often the device tree nodes associated with a PHY provider will contain a set
of children that each represent a single PHY. Some bindings may nest the child
nodes within extra levels for context and extensibility, in which case the low
level of_phy_provider_register_full() and devm_of_phy_provider_register_full()
macros can be used to override the node containing the children.”h]”hX{  Often the device tree nodes associated with a PHY provider will contain a set
of children that each represent a single PHY. Some bindings may nest the child
nodes within extra levels for context and extensibility, in which case the low
level of_phy_provider_register_full() and devm_of_phy_provider_register_full()
macros can be used to override the node containing the children.”…””}”(hj¯  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h×hŸh¶h K4hjp  hžhubj  )”}”(hXî  #define of_phy_provider_register_full(dev, children, xlate) \
        __of_phy_provider_register(dev, children, THIS_MODULE, xlate)

#define devm_of_phy_provider_register_full(dev, children, xlate) \
        __devm_of_phy_provider_register_full(dev, children,
                                             THIS_MODULE, xlate)

void devm_of_phy_provider_unregister(struct device *dev,
        struct phy_provider *phy_provider);
void of_phy_provider_unregister(struct phy_provider *phy_provider);”h]”hXî  #define of_phy_provider_register_full(dev, children, xlate) \
        __of_phy_provider_register(dev, children, THIS_MODULE, xlate)

#define devm_of_phy_provider_register_full(dev, children, xlate) \
        __devm_of_phy_provider_register_full(dev, children,
                                             THIS_MODULE, xlate)

void devm_of_phy_provider_unregister(struct device *dev,
        struct phy_provider *phy_provider);
void of_phy_provider_unregister(struct phy_provider *phy_provider);”…””}”hj½  sbah}”(h]”h ]”h"]”h$]”h&]”jŸ  j   uh1j  hŸh¶h K<hjp  hžhubhØ)”}”(hŒadevm_of_phy_provider_unregister and of_phy_provider_unregister can be used to
unregister the PHY.”h]”hŒadevm_of_phy_provider_unregister and of_phy_provider_unregister can be used to
unregister the PHY.”…””}”(hjË  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h×hŸh¶h KGhjp  hžhubeh}”(h]”Œ*registering-unregistering-the-phy-provider”ah ]”h"]”Œ*registering/unregistering the phy provider”ah$]”h&]”uh1h¡hh£hžhhŸh¶h Kubh¢)”}”(hhh]”(h§)”}”(hŒCreating the PHY”h]”hŒCreating the PHY”…””}”(hjä  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¦hjá  hžhhŸh¶h KKubhØ)”}”(hŒ–The PHY driver should create the PHY in order for other peripheral controllers
to make use of it. The PHY framework provides 2 APIs to create the PHY.”h]”hŒ–The PHY driver should create the PHY in order for other peripheral controllers
to make use of it. The PHY framework provides 2 APIs to create the PHY.”…””}”(hjò  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h×hŸh¶h KMhjá  hžhubj  )”}”(hX  struct phy *phy_create(struct device *dev, struct device_node *node,
                       const struct phy_ops *ops);
struct phy *devm_phy_create(struct device *dev,
                            struct device_node *node,
                            const struct phy_ops *ops);”h]”hX  struct phy *phy_create(struct device *dev, struct device_node *node,
                       const struct phy_ops *ops);
struct phy *devm_phy_create(struct device *dev,
                            struct device_node *node,
                            const struct phy_ops *ops);”…””}”hj   sbah}”(h]”h ]”h"]”h$]”h&]”jŸ  j   uh1j  hŸh¶h KRhjá  hžhubhØ)”}”(hŒÜThe PHY drivers can use one of the above 2 APIs to create the PHY by passing
the device pointer and phy ops.
phy_ops is a set of function pointers for performing PHY operations such as
init, exit, power_on and power_off.”h]”hŒÜThe PHY drivers can use one of the above 2 APIs to create the PHY by passing
the device pointer and phy ops.
phy_ops is a set of function pointers for performing PHY operations such as
init, exit, power_on and power_off.”…””}”(hj  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h×hŸh¶h KXhjá  hžhubhØ)”}”(hŒÁInorder to dereference the private data (in phy_ops), the phy provider driver
can use phy_set_drvdata() after creating the PHY and use phy_get_drvdata() in
phy_ops to get back the private data.”h]”hŒÁInorder to dereference the private data (in phy_ops), the phy provider driver
can use phy_set_drvdata() after creating the PHY and use phy_get_drvdata() in
phy_ops to get back the private data.”…””}”(hj  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h×hŸh¶h K]hjá  hžhubeh}”(h]”Œcreating-the-phy”ah ]”h"]”Œcreating the phy”ah$]”h&]”uh1h¡hh£hžhhŸh¶h KKubh¢)”}”(hhh]”(h§)”}”(hŒGetting a reference to the PHY”h]”hŒGetting a reference to the PHY”…””}”(hj5  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¦hj2  hžhhŸh¶h KbubhØ)”}”(hŒ™Before the controller can make use of the PHY, it has to get a reference to
it. This framework provides the following APIs to get a reference to the PHY.”h]”hŒ™Before the controller can make use of the PHY, it has to get a reference to
it. This framework provides the following APIs to get a reference to the PHY.”…””}”(hjC  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h×hŸh¶h Kdhj2  hžhubj  )”}”(hX»  struct phy *phy_get(struct device *dev, const char *string);
struct phy *devm_phy_get(struct device *dev, const char *string);
struct phy *devm_phy_optional_get(struct device *dev,
                                  const char *string);
struct phy *devm_of_phy_get(struct device *dev, struct device_node *np,
                            const char *con_id);
struct phy *devm_of_phy_optional_get(struct device *dev,
                                     struct device_node *np,
                                     const char *con_id);
struct phy *devm_of_phy_get_by_index(struct device *dev,
                                     struct device_node *np,
                                     int index);”h]”hX»  struct phy *phy_get(struct device *dev, const char *string);
struct phy *devm_phy_get(struct device *dev, const char *string);
struct phy *devm_phy_optional_get(struct device *dev,
                                  const char *string);
struct phy *devm_of_phy_get(struct device *dev, struct device_node *np,
                            const char *con_id);
struct phy *devm_of_phy_optional_get(struct device *dev,
                                     struct device_node *np,
                                     const char *con_id);
struct phy *devm_of_phy_get_by_index(struct device *dev,
                                     struct device_node *np,
                                     int index);”…””}”hjQ  sbah}”(h]”h ]”h"]”h$]”h&]”jŸ  j   uh1j  hŸh¶h Kihj2  hžhubhØ)”}”(hX  phy_get, devm_phy_get and devm_phy_optional_get can be used to get the PHY.
In the case of dt boot, the string arguments
should contain the phy name as given in the dt data and in the case of
non-dt boot, it should contain the label of the PHY.  The two
devm_phy_get associates the device with the PHY using devres on
successful PHY get. On driver detach, release function is invoked on
the devres data and devres data is freed.
The _optional_get variants should be used when the phy is optional. These
functions will never return -ENODEV, but instead return NULL when
the phy cannot be found.
Some generic drivers, such as ehci, may use multiple phys. In this case,
devm_of_phy_get or devm_of_phy_get_by_index can be used to get a phy
reference based on name or index.”h]”hX  phy_get, devm_phy_get and devm_phy_optional_get can be used to get the PHY.
In the case of dt boot, the string arguments
should contain the phy name as given in the dt data and in the case of
non-dt boot, it should contain the label of the PHY.  The two
devm_phy_get associates the device with the PHY using devres on
successful PHY get. On driver detach, release function is invoked on
the devres data and devres data is freed.
The _optional_get variants should be used when the phy is optional. These
functions will never return -ENODEV, but instead return NULL when
the phy cannot be found.
Some generic drivers, such as ehci, may use multiple phys. In this case,
devm_of_phy_get or devm_of_phy_get_by_index can be used to get a phy
reference based on name or index.”…””}”(hj_  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h×hŸh¶h Kvhj2  hžhubhØ)”}”(hXD  It should be noted that NULL is a valid phy reference. All phy
consumer calls on the NULL phy become NOPs. That is the release calls,
the phy_init() and phy_exit() calls, and phy_power_on() and
phy_power_off() calls are all NOP when applied to a NULL phy. The NULL
phy is useful in devices for handling optional phy devices.”h]”hXD  It should be noted that NULL is a valid phy reference. All phy
consumer calls on the NULL phy become NOPs. That is the release calls,
the phy_init() and phy_exit() calls, and phy_power_on() and
phy_power_off() calls are all NOP when applied to a NULL phy. The NULL
phy is useful in devices for handling optional phy devices.”…””}”(hjm  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h×hŸh¶h K„hj2  hžhubeh}”(h]”Œgetting-a-reference-to-the-phy”ah ]”h"]”Œgetting a reference to the phy”ah$]”h&]”uh1h¡hh£hžhhŸh¶h Kbubh¢)”}”(hhh]”(h§)”}”(hŒOrder of API calls”h]”hŒOrder of API calls”…””}”(hj†  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¦hjƒ  hžhhŸh¶h K‹ubhØ)”}”(hŒ&The general order of calls should be::”h]”hŒ%The general order of calls should be:”…””}”(hj”  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h×hŸh¶h Khjƒ  hžhubj  )”}”(hŒv[devm_][of_]phy_get()
phy_init()
phy_power_on()
[phy_set_mode[_ext]()]
...
phy_power_off()
phy_exit()
[[of_]phy_put()]”h]”hŒv[devm_][of_]phy_get()
phy_init()
phy_power_on()
[phy_set_mode[_ext]()]
...
phy_power_off()
phy_exit()
[[of_]phy_put()]”…””}”hj¢  sbah}”(h]”h ]”h"]”h$]”h&]”jŸ  j   uh1j  hŸh¶h Khjƒ  hžhubhØ)”}”(hX   Some PHY drivers may not implement :c:func:`phy_init` or :c:func:`phy_power_on`,
but controllers should always call these functions to be compatible with other
PHYs. Some PHYs may require :c:func:`phy_set_mode <phy_set_mode_ext>`, while
others may use a default mode (typically configured via devicetree or other
firmware). For compatibility, you should always call this function if you know
what mode you will be using. Generally, this function should be called after
:c:func:`phy_power_on`, although some PHY drivers may allow it at any time.”h]”(hŒ#Some PHY drivers may not implement ”…””}”(hj°  hžhhŸNh Nubh)”}”(hŒ:c:func:`phy_init`”h]”hŒliteral”“”)”}”(hjº  h]”hŒ
phy_init()”…””}”(hj¾  hžhhŸNh Nubah}”(h]”h ]”(Œxref”Œc”Œc-func”eh"]”h$]”h&]”uh1j¼  hj¸  ubah}”(h]”h ]”h"]”h$]”h&]”Œrefdoc”Œdriver-api/phy/phy”Œ	refdomain”jÉ  Œreftype”Œfunc”Œrefexplicit”‰Œrefwarn”‰Œ	reftarget”Œphy_init”uh1hhŸh¶h K˜hj°  ubhŒ or ”…””}”(hj°  hžhhŸNh Nubh)”}”(hŒ:c:func:`phy_power_on`”h]”j½  )”}”(hjã  h]”hŒphy_power_on()”…””}”(hjå  hžhhŸNh Nubah}”(h]”h ]”(jÈ  jÉ  Œc-func”eh"]”h$]”h&]”uh1j¼  hjá  ubah}”(h]”h ]”h"]”h$]”h&]”Œrefdoc”jÕ  Œ	refdomain”jÉ  Œreftype”Œfunc”Œrefexplicit”‰Œrefwarn”‰jÛ  Œphy_power_on”uh1hhŸh¶h K˜hj°  ubhŒm,
but controllers should always call these functions to be compatible with other
PHYs. Some PHYs may require ”…””}”(hj°  hžhhŸNh Nubh)”}”(hŒ):c:func:`phy_set_mode <phy_set_mode_ext>`”h]”j½  )”}”(hj  h]”hŒphy_set_mode”…””}”(hj  hžhhŸNh Nubah}”(h]”h ]”(jÈ  jÉ  Œc-func”eh"]”h$]”h&]”uh1j¼  hj  ubah}”(h]”h ]”h"]”h$]”h&]”Œrefdoc”jÕ  Œ	refdomain”jÉ  Œreftype”Œfunc”Œrefexplicit”ˆŒrefwarn”‰jÛ  Œphy_set_mode_ext”uh1hhŸh¶h K˜hj°  ubhŒð, while
others may use a default mode (typically configured via devicetree or other
firmware). For compatibility, you should always call this function if you know
what mode you will be using. Generally, this function should be called after
”…””}”(hj°  hžhhŸNh Nubh)”}”(hŒ:c:func:`phy_power_on`”h]”j½  )”}”(hj)  h]”hŒphy_power_on()”…””}”(hj+  hžhhŸNh Nubah}”(h]”h ]”(jÈ  jÉ  Œc-func”eh"]”h$]”h&]”uh1j¼  hj'  ubah}”(h]”h ]”h"]”h$]”h&]”Œrefdoc”jÕ  Œ	refdomain”jÉ  Œreftype”Œfunc”Œrefexplicit”‰Œrefwarn”‰jÛ  Œphy_power_on”uh1hhŸh¶h K˜hj°  ubhŒ5, although some PHY drivers may allow it at any time.”…””}”(hj°  hžhhŸNh Nubeh}”(h]”h ]”h"]”h$]”h&]”uh1h×hŸh¶h K˜hjƒ  hžhubeh}”(h]”Œorder-of-api-calls”ah ]”h"]”Œorder of api calls”ah$]”h&]”uh1h¡hh£hžhhŸh¶h K‹ubh¢)”}”(hhh]”(h§)”}”(hŒ Releasing a reference to the PHY”h]”hŒ Releasing a reference to the PHY”…””}”(hj[  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¦hjX  hžhhŸh¶h K¡ubhØ)”}”(hŒÛWhen the controller no longer needs the PHY, it has to release the reference
to the PHY it has obtained using the APIs mentioned in the above section. The
PHY framework provides 2 APIs to release a reference to the PHY.”h]”hŒÛWhen the controller no longer needs the PHY, it has to release the reference
to the PHY it has obtained using the APIs mentioned in the above section. The
PHY framework provides 2 APIs to release a reference to the PHY.”…””}”(hji  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h×hŸh¶h K£hjX  hžhubj  )”}”(hŒVvoid phy_put(struct phy *phy);
void devm_phy_put(struct device *dev, struct phy *phy);”h]”hŒVvoid phy_put(struct phy *phy);
void devm_phy_put(struct device *dev, struct phy *phy);”…””}”hjw  sbah}”(h]”h ]”h"]”h$]”h&]”jŸ  j   uh1j  hŸh¶h K©hjX  hžhubhØ)”}”(hŒyBoth these APIs are used to release a reference to the PHY and devm_phy_put
destroys the devres associated with this PHY.”h]”hŒyBoth these APIs are used to release a reference to the PHY and devm_phy_put
destroys the devres associated with this PHY.”…””}”(hj…  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h×hŸh¶h K¬hjX  hžhubeh}”(h]”Œ releasing-a-reference-to-the-phy”ah ]”h"]”Œ releasing a reference to the phy”ah$]”h&]”uh1h¡hh£hžhhŸh¶h K¡ubh¢)”}”(hhh]”(h§)”}”(hŒDestroying the PHY”h]”hŒDestroying the PHY”…””}”(hjž  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¦hj›  hžhhŸh¶h K°ubhØ)”}”(hŒzWhen the driver that created the PHY is unloaded, it should destroy the PHY it
created using one of the following 2 APIs::”h]”hŒyWhen the driver that created the PHY is unloaded, it should destroy the PHY it
created using one of the following 2 APIs:”…””}”(hj¬  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h×hŸh¶h K²hj›  hžhubj  )”}”(hŒ^void phy_destroy(struct phy *phy);
void devm_phy_destroy(struct device *dev, struct phy *phy);”h]”hŒ^void phy_destroy(struct phy *phy);
void devm_phy_destroy(struct device *dev, struct phy *phy);”…””}”hjº  sbah}”(h]”h ]”h"]”h$]”h&]”jŸ  j   uh1j  hŸh¶h Kµhj›  hžhubhØ)”}”(hŒbBoth these APIs destroy the PHY and devm_phy_destroy destroys the devres
associated with this PHY.”h]”hŒbBoth these APIs destroy the PHY and devm_phy_destroy destroys the devres
associated with this PHY.”…””}”(hjÈ  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h×hŸh¶h K¸hj›  hžhubeh}”(h]”Œdestroying-the-phy”ah ]”h"]”Œdestroying the phy”ah$]”h&]”uh1h¡hh£hžhhŸh¶h K°ubh¢)”}”(hhh]”(h§)”}”(hŒ
PM Runtime”h]”hŒ
PM Runtime”…””}”(hjá  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¦hjÞ  hžhhŸh¶h K¼ubhØ)”}”(hXB  This subsystem is pm runtime enabled. So while creating the PHY,
pm_runtime_enable of the phy device created by this subsystem is called and
while destroying the PHY, pm_runtime_disable is called. Note that the phy
device created by this subsystem will be a child of the device that calls
phy_create (PHY provider device).”h]”hXB  This subsystem is pm runtime enabled. So while creating the PHY,
pm_runtime_enable of the phy device created by this subsystem is called and
while destroying the PHY, pm_runtime_disable is called. Note that the phy
device created by this subsystem will be a child of the device that calls
phy_create (PHY provider device).”…””}”(hjï  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h×hŸh¶h K¾hjÞ  hžhubhØ)”}”(hX¸  So pm_runtime_get_sync of the phy_device created by this subsystem will invoke
pm_runtime_get_sync of PHY provider device because of parent-child relationship.
It should also be noted that phy_power_on and phy_power_off performs
phy_pm_runtime_get_sync and phy_pm_runtime_put respectively.
There are exported APIs like phy_pm_runtime_get, phy_pm_runtime_get_sync,
phy_pm_runtime_put and phy_pm_runtime_put_sync for performing PM operations.”h]”hX¸  So pm_runtime_get_sync of the phy_device created by this subsystem will invoke
pm_runtime_get_sync of PHY provider device because of parent-child relationship.
It should also be noted that phy_power_on and phy_power_off performs
phy_pm_runtime_get_sync and phy_pm_runtime_put respectively.
There are exported APIs like phy_pm_runtime_get, phy_pm_runtime_get_sync,
phy_pm_runtime_put and phy_pm_runtime_put_sync for performing PM operations.”…””}”(hjý  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h×hŸh¶h KÄhjÞ  hžhubeh}”(h]”Œ
pm-runtime”ah ]”h"]”Œ
pm runtime”ah$]”h&]”uh1h¡hh£hžhhŸh¶h K¼ubh¢)”}”(hhh]”(h§)”}”(hŒPHY Mappings”h]”hŒPHY Mappings”…””}”(hj  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¦hj  hžhhŸh¶h KÌubhØ)”}”(hX  In order to get reference to a PHY without help from DeviceTree, the framework
offers lookups which can be compared to clkdev that allow clk structures to be
bound to devices. A lookup can be made during runtime when a handle to the
struct phy already exists.”h]”hX  In order to get reference to a PHY without help from DeviceTree, the framework
offers lookups which can be compared to clkdev that allow clk structures to be
bound to devices. A lookup can be made during runtime when a handle to the
struct phy already exists.”…””}”(hj$  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h×hŸh¶h KÎhj  hžhubhØ)”}”(hŒVThe framework offers the following API for registering and unregistering the
lookups::”h]”hŒUThe framework offers the following API for registering and unregistering the
lookups:”…””}”(hj2  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h×hŸh¶h KÓhj  hžhubj  )”}”(hŒÍint phy_create_lookup(struct phy *phy, const char *con_id,
                      const char *dev_id);
void phy_remove_lookup(struct phy *phy, const char *con_id,
                       const char *dev_id);”h]”hŒÍint phy_create_lookup(struct phy *phy, const char *con_id,
                      const char *dev_id);
void phy_remove_lookup(struct phy *phy, const char *con_id,
                       const char *dev_id);”…””}”hj@  sbah}”(h]”h ]”h"]”h$]”h&]”jŸ  j   uh1j  hŸh¶h KÖhj  hžhubeh}”(h]”Œphy-mappings”ah ]”h"]”Œphy mappings”ah$]”h&]”uh1h¡hh£hžhhŸh¶h KÌubh¢)”}”(hhh]”(h§)”}”(hŒDeviceTree Binding”h]”hŒDeviceTree Binding”…””}”(hjY  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¦hjV  hžhhŸh¶h KÜubhØ)”}”(hŒjThe documentation for PHY dt binding can be found @
Documentation/devicetree/bindings/phy/phy-bindings.txt”h]”hŒjThe documentation for PHY dt binding can be found @
Documentation/devicetree/bindings/phy/phy-bindings.txt”…””}”(hjg  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h×hŸh¶h KÞhjV  hžhubeh}”(h]”Œdevicetree-binding”ah ]”h"]”Œdevicetree binding”ah$]”h&]”uh1h¡hh£hžhhŸh¶h KÜubeh}”(h]”Œphy-subsystem”ah ]”h"]”Œphy subsystem”ah$]”h&]”uh1h¡hhhžhhŸh¶h Kubeh}”(h]”h ]”h"]”h$]”h&]”Œsource”h¶uh1hŒcurrent_source”NŒcurrent_line”NŒsettings”Œdocutils.frontend”ŒValues”“”)”}”(h¦NŒ	generator”NŒ	datestamp”NŒsource_link”NŒ
source_url”NŒtoc_backlinks”Œentry”Œfootnote_backlinks”KŒsectnum_xform”KŒstrip_comments”NŒstrip_elements_with_classes”NŒstrip_classes”NŒreport_level”KŒ
halt_level”KŒexit_status_level”KŒdebug”NŒwarning_stream”NŒ	traceback”ˆŒinput_encoding”Œ	utf-8-sig”Œinput_encoding_error_handler”Œstrict”Œoutput_encoding”Œutf-8”Œoutput_encoding_error_handler”j¨  Œerror_encoding”Œutf-8”Œerror_encoding_error_handler”Œbackslashreplace”Œlanguage_code”Œen”Œrecord_dependencies”NŒconfig”NŒ	id_prefix”hŒauto_id_prefix”Œid”Œdump_settings”NŒdump_internals”NŒdump_transforms”NŒdump_pseudo_xml”NŒexpose_internals”NŒstrict_visitor”NŒ_disable_config”NŒ_source”h¶Œ_destination”NŒ_config_files”]”Œ7/var/lib/git/docbuild/linux/Documentation/docutils.conf”aŒfile_insertion_enabled”ˆŒraw_enabled”KŒline_length_limit”M'Œpep_references”NŒpep_base_url”Œhttps://peps.python.org/”Œpep_file_url_template”Œpep-%04d”Œrfc_references”NŒrfc_base_url”Œ&https://datatracker.ietf.org/doc/html/”Œ	tab_width”KŒtrim_footnote_reference_space”‰Œsyntax_highlight”Œlong”Œsmart_quotes”ˆŒsmartquotes_locales”]”Œcharacter_level_inline_markup”‰Œdoctitle_xform”‰Œdocinfo_xform”KŒsectsubtitle_xform”‰Œimage_loading”Œlink”Œembed_stylesheet”‰Œcloak_email_addresses”ˆŒsection_self_link”‰Œenv”NubŒreporter”NŒindirect_targets”]”Œsubstitution_defs”}”Œsubstitution_names”}”Œrefnames”}”Œrefids”}”Œnameids”}”(j‚  j  jm  jj  jÞ  jÛ  j/  j,  j€  j}  jU  jR  j˜  j•  jÛ  jØ  j  j  jS  jP  jz  jw  uŒ	nametypes”}”(j‚  ‰jm  ‰jÞ  ‰j/  ‰j€  ‰jU  ‰j˜  ‰jÛ  ‰j  ‰jS  ‰jz  ‰uh}”(j  h£jj  j  jÛ  jp  j,  já  j}  j2  jR  jƒ  j•  jX  jØ  j›  j  jÞ  jP  j  jw  jV  uŒfootnote_refs”}”Œcitation_refs”}”Œautofootnotes”]”Œautofootnote_refs”]”Œsymbol_footnotes”]”Œsymbol_footnote_refs”]”Œ	footnotes”]”Œ	citations”]”Œautofootnote_start”KŒsymbol_footnote_start”K Œ
id_counter”Œcollections”ŒCounter”“”}”…”R”Œparse_messages”]”Œtransform_messages”]”Œtransformer”NŒinclude_log”]”Œ
decoration”Nhžhub.