forked from luck/tmp_suning_uos_patched
OMAP clockdomain/powerdomain: improve documentation
This patch only affects documentation; no functional changes are included. Clean up comments in the current clockdomain, powerdomain code and header files. This mostly involves conversion to kerneldoc format, although some clarifications are also included. Signed-off-by: Paul Walmsley <paul@pwsan.com>
This commit is contained in:
Paul Walmsley
parent
915aad89fc
commit
f0271d65f9
@ -351,10 +351,10 @@ static void _init_sleepdep_usecount(struct clockdomain *clkdm)
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* @init_autodeps: optional pointer to an array of autodeps to register
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*
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* Set up internal state. If a pointer to an array of clockdomains
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* was supplied, loop through the list of clockdomains, register all
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* that are available on the current platform. Similarly, if a pointer
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* to an array of clockdomain autodependencies was provided, register
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* those. No return value.
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* @clkdms was supplied, loop through the list of clockdomains,
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* register all that are available on the current platform. Similarly,
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* if a pointer to an array of clockdomain autodependencies
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* @init_autodeps was provided, register those. No return value.
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*/
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void clkdm_init(struct clockdomain **clkdms,
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struct clkdm_autodep *init_autodeps)
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@ -386,8 +386,8 @@ void clkdm_init(struct clockdomain **clkdms,
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* clkdm_lookup - look up a clockdomain by name, return a pointer
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* @name: name of clockdomain
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*
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* Find a registered clockdomain by its name. Returns a pointer to the
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* struct clockdomain if found, or NULL otherwise.
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* Find a registered clockdomain by its name @name. Returns a pointer
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* to the struct clockdomain if found, or NULL otherwise.
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*/
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struct clockdomain *clkdm_lookup(const char *name)
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{
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@ -412,8 +412,8 @@ struct clockdomain *clkdm_lookup(const char *name)
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* clkdm_for_each - call function on each registered clockdomain
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* @fn: callback function *
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*
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* Call the supplied function for each registered clockdomain.
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* The callback function can return anything but 0 to bail
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* Call the supplied function @fn for each registered clockdomain.
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* The callback function @fn can return anything but 0 to bail
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* out early from the iterator. The callback function is called with
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* the clkdm_mutex held, so no clockdomain structure manipulation
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* functions should be called from the callback, although hardware
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@ -446,7 +446,7 @@ int clkdm_for_each(int (*fn)(struct clockdomain *clkdm, void *user),
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* @clkdm: struct clockdomain *
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*
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* Return a pointer to the struct powerdomain that the specified clockdomain
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* 'clkdm' exists in, or returns NULL if clkdm argument is NULL.
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* @clkdm exists in, or returns NULL if @clkdm is NULL.
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*/
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struct powerdomain *clkdm_get_pwrdm(struct clockdomain *clkdm)
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{
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@ -759,10 +759,10 @@ int clkdm_clear_all_sleepdeps(struct clockdomain *clkdm)
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/**
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* omap2_clkdm_clktrctrl_read - read the clkdm's current state transition mode
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* @clk: struct clk * of a clockdomain
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* @clkdm: struct clkdm * of a clockdomain
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*
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* Return the clockdomain's current state transition mode from the
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* corresponding domain OMAP2_CM_CLKSTCTRL register. Returns -EINVAL if clk
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* Return the clockdomain @clkdm current state transition mode from the
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* corresponding domain CM_CLKSTCTRL register. Returns -EINVAL if @clkdm
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* is NULL or the current mode upon success.
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*/
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static int omap2_clkdm_clktrctrl_read(struct clockdomain *clkdm)
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@ -784,7 +784,7 @@ static int omap2_clkdm_clktrctrl_read(struct clockdomain *clkdm)
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* @clkdm: struct clockdomain *
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*
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* Instruct the CM to force a sleep transition on the specified
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* clockdomain 'clkdm'. Returns -EINVAL if clk is NULL or if
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* clockdomain @clkdm. Returns -EINVAL if @clkdm is NULL or if
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* clockdomain does not support software-initiated sleep; 0 upon
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* success.
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*/
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@ -828,7 +828,7 @@ int omap2_clkdm_sleep(struct clockdomain *clkdm)
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* @clkdm: struct clockdomain *
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*
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* Instruct the CM to force a wakeup transition on the specified
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* clockdomain 'clkdm'. Returns -EINVAL if clkdm is NULL or if the
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* clockdomain @clkdm. Returns -EINVAL if @clkdm is NULL or if the
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* clockdomain does not support software-controlled wakeup; 0 upon
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* success.
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*/
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@ -871,7 +871,7 @@ int omap2_clkdm_wakeup(struct clockdomain *clkdm)
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* omap2_clkdm_allow_idle - enable hwsup idle transitions for clkdm
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* @clkdm: struct clockdomain *
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*
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* Allow the hardware to automatically switch the clockdomain into
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* Allow the hardware to automatically switch the clockdomain @clkdm into
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* active or idle states, as needed by downstream clocks. If the
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* clockdomain has any downstream clocks enabled in the clock
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* framework, wkdep/sleepdep autodependencies are added; this is so
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@ -904,8 +904,8 @@ void omap2_clkdm_allow_idle(struct clockdomain *clkdm)
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* @clkdm: struct clockdomain *
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*
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* Prevent the hardware from automatically switching the clockdomain
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* into inactive or idle states. If the clockdomain has downstream
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* clocks enabled in the clock framework, wkdep/sleepdep
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* @clkdm into inactive or idle states. If the clockdomain has
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* downstream clocks enabled in the clock framework, wkdep/sleepdep
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* autodependencies are removed. No return value.
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*/
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void omap2_clkdm_deny_idle(struct clockdomain *clkdm)
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@ -936,14 +936,14 @@ void omap2_clkdm_deny_idle(struct clockdomain *clkdm)
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* @clkdm: struct clockdomain *
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* @clk: struct clk * of the enabled downstream clock
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*
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* Increment the usecount of this clockdomain 'clkdm' and ensure that
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* it is awake. Intended to be called by clk_enable() code. If the
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* clockdomain is in software-supervised idle mode, force the
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* clockdomain to wake. If the clockdomain is in hardware-supervised
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* idle mode, add clkdm-pwrdm autodependencies, to ensure that devices
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* in the clockdomain can be read from/written to by on-chip processors.
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* Returns -EINVAL if passed null pointers; returns 0 upon success or
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* if the clockdomain is in hwsup idle mode.
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* Increment the usecount of the clockdomain @clkdm and ensure that it
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* is awake before @clk is enabled. Intended to be called by
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* clk_enable() code. If the clockdomain is in software-supervised
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* idle mode, force the clockdomain to wake. If the clockdomain is in
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* hardware-supervised idle mode, add clkdm-pwrdm autodependencies, to
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* ensure that devices in the clockdomain can be read from/written to
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* by on-chip processors. Returns -EINVAL if passed null pointers;
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* returns 0 upon success or if the clockdomain is in hwsup idle mode.
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*/
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int omap2_clkdm_clk_enable(struct clockdomain *clkdm, struct clk *clk)
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{
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@ -988,13 +988,14 @@ int omap2_clkdm_clk_enable(struct clockdomain *clkdm, struct clk *clk)
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* @clkdm: struct clockdomain *
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* @clk: struct clk * of the disabled downstream clock
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*
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* Decrement the usecount of this clockdomain 'clkdm'. Intended to be
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* called by clk_disable() code. If the usecount goes to 0, put the
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* clockdomain to sleep (software-supervised mode) or remove the
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* clkdm-pwrdm autodependencies (hardware-supervised mode). Returns
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* -EINVAL if passed null pointers; -ERANGE if the clkdm usecount
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* underflows and debugging is enabled; or returns 0 upon success or
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* if the clockdomain is in hwsup idle mode.
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* Decrement the usecount of this clockdomain @clkdm when @clk is
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* disabled. Intended to be called by clk_disable() code. If the
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* clockdomain usecount goes to 0, put the clockdomain to sleep
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* (software-supervised mode) or remove the clkdm autodependencies
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* (hardware-supervised mode). Returns -EINVAL if passed null
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* pointers; -ERANGE if the @clkdm usecount underflows and debugging
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* is enabled; or returns 0 upon success or if the clockdomain is in
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* hwsup idle mode.
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*/
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int omap2_clkdm_clk_disable(struct clockdomain *clkdm, struct clk *clk)
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{
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@ -185,11 +185,13 @@ static int _pwrdm_post_transition_cb(struct powerdomain *pwrdm, void *unused)
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/**
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* pwrdm_init - set up the powerdomain layer
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* @pwrdm_list: array of struct powerdomain pointers to register
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*
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* Loop through the list of powerdomains, registering all that are
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* available on the current CPU. If pwrdm_list is supplied and not
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* null, all of the referenced powerdomains will be registered. No
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* return value.
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* Loop through the array of powerdomains @pwrdm_list, registering all
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* that are available on the current CPU. If pwrdm_list is supplied
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* and not null, all of the referenced powerdomains will be
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* registered. No return value. XXX pwrdm_list is not really a
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* "list"; it is an array. Rename appropriately.
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*/
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void pwrdm_init(struct powerdomain **pwrdm_list)
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{
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@ -217,8 +219,8 @@ void pwrdm_init(struct powerdomain **pwrdm_list)
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* pwrdm_lookup - look up a powerdomain by name, return a pointer
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* @name: name of powerdomain
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*
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* Find a registered powerdomain by its name. Returns a pointer to the
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* struct powerdomain if found, or NULL otherwise.
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* Find a registered powerdomain by its name @name. Returns a pointer
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* to the struct powerdomain if found, or NULL otherwise.
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*/
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struct powerdomain *pwrdm_lookup(const char *name)
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{
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@ -236,11 +238,11 @@ struct powerdomain *pwrdm_lookup(const char *name)
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* pwrdm_for_each - call function on each registered clockdomain
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* @fn: callback function *
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*
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* Call the supplied function for each registered powerdomain. The
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* callback function can return anything but 0 to bail out early from
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* the iterator. Returns the last return value of the callback function, which
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* should be 0 for success or anything else to indicate failure; or -EINVAL if
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* the function pointer is null.
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* Call the supplied function @fn for each registered powerdomain.
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* The callback function @fn can return anything but 0 to bail out
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* early from the iterator. Returns the last return value of the
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* callback function, which should be 0 for success or anything else
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* to indicate failure; or -EINVAL if the function pointer is null.
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*/
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int pwrdm_for_each(int (*fn)(struct powerdomain *pwrdm, void *user),
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void *user)
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@ -265,7 +267,7 @@ int pwrdm_for_each(int (*fn)(struct powerdomain *pwrdm, void *user),
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* @pwrdm: struct powerdomain * to add the clockdomain to
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* @clkdm: struct clockdomain * to associate with a powerdomain
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*
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* Associate the clockdomain 'clkdm' with a powerdomain 'pwrdm'. This
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* Associate the clockdomain @clkdm with a powerdomain @pwrdm. This
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* enables the use of pwrdm_for_each_clkdm(). Returns -EINVAL if
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* presented with invalid pointers; -ENOMEM if memory could not be allocated;
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* or 0 upon success.
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@ -313,10 +315,10 @@ int pwrdm_add_clkdm(struct powerdomain *pwrdm, struct clockdomain *clkdm)
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* @pwrdm: struct powerdomain * to add the clockdomain to
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* @clkdm: struct clockdomain * to associate with a powerdomain
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*
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* Dissociate the clockdomain 'clkdm' from the powerdomain
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* 'pwrdm'. Returns -EINVAL if presented with invalid pointers;
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* -ENOENT if the clkdm was not associated with the powerdomain, or 0
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* upon success.
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* Dissociate the clockdomain @clkdm from the powerdomain
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* @pwrdm. Returns -EINVAL if presented with invalid pointers; -ENOENT
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* if @clkdm was not associated with the powerdomain, or 0 upon
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* success.
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*/
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int pwrdm_del_clkdm(struct powerdomain *pwrdm, struct clockdomain *clkdm)
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{
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@ -353,8 +355,8 @@ int pwrdm_del_clkdm(struct powerdomain *pwrdm, struct clockdomain *clkdm)
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* @pwrdm: struct powerdomain * to iterate over
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* @fn: callback function *
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*
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* Call the supplied function for each clockdomain in the powerdomain
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* 'pwrdm'. The callback function can return anything but 0 to bail
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* Call the supplied function @fn for each clockdomain in the powerdomain
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* @pwrdm. The callback function can return anything but 0 to bail
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* out early from the iterator. Returns -EINVAL if presented with
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* invalid pointers; or passes along the last return value of the
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* callback function, which should be 0 for success or anything else
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@ -380,7 +382,7 @@ int pwrdm_for_each_clkdm(struct powerdomain *pwrdm,
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* pwrdm_get_mem_bank_count - get number of memory banks in this powerdomain
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* @pwrdm: struct powerdomain *
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*
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* Return the number of controllable memory banks in powerdomain pwrdm,
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* Return the number of controllable memory banks in powerdomain @pwrdm,
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* starting with 1. Returns -EINVAL if the powerdomain pointer is null.
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*/
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int pwrdm_get_mem_bank_count(struct powerdomain *pwrdm)
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@ -396,7 +398,7 @@ int pwrdm_get_mem_bank_count(struct powerdomain *pwrdm)
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* @pwrdm: struct powerdomain * to set
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* @pwrst: one of the PWRDM_POWER_* macros
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*
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* Set the powerdomain pwrdm's next power state to pwrst. The powerdomain
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* Set the powerdomain @pwrdm's next power state to @pwrst. The powerdomain
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* may not enter this state immediately if the preconditions for this state
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* have not been satisfied. Returns -EINVAL if the powerdomain pointer is
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* null or if the power state is invalid for the powerdomin, or returns 0
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@ -424,7 +426,7 @@ int pwrdm_set_next_pwrst(struct powerdomain *pwrdm, u8 pwrst)
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* pwrdm_read_next_pwrst - get next powerdomain power state
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* @pwrdm: struct powerdomain * to get power state
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*
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* Return the powerdomain pwrdm's next power state. Returns -EINVAL
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* Return the powerdomain @pwrdm's next power state. Returns -EINVAL
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* if the powerdomain pointer is null or returns the next power state
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* upon success.
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*/
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@ -441,7 +443,7 @@ int pwrdm_read_next_pwrst(struct powerdomain *pwrdm)
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* pwrdm_read_pwrst - get current powerdomain power state
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* @pwrdm: struct powerdomain * to get power state
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*
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* Return the powerdomain pwrdm's current power state. Returns -EINVAL
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* Return the powerdomain @pwrdm's current power state. Returns -EINVAL
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* if the powerdomain pointer is null or returns the current power state
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* upon success.
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*/
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@ -458,7 +460,7 @@ int pwrdm_read_pwrst(struct powerdomain *pwrdm)
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* pwrdm_read_prev_pwrst - get previous powerdomain power state
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* @pwrdm: struct powerdomain * to get previous power state
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*
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* Return the powerdomain pwrdm's previous power state. Returns -EINVAL
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* Return the powerdomain @pwrdm's previous power state. Returns -EINVAL
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* if the powerdomain pointer is null or returns the previous power state
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* upon success.
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*/
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@ -476,11 +478,11 @@ int pwrdm_read_prev_pwrst(struct powerdomain *pwrdm)
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* @pwrdm: struct powerdomain * to set
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* @pwrst: one of the PWRDM_POWER_* macros
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*
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* Set the next power state that the logic portion of the powerdomain
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* pwrdm will enter when the powerdomain enters retention. This will
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* be either RETENTION or OFF, if supported. Returns -EINVAL if the
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* powerdomain pointer is null or the target power state is not not
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* supported, or returns 0 upon success.
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* Set the next power state @pwrst that the logic portion of the
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* powerdomain @pwrdm will enter when the powerdomain enters retention.
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* This will be either RETENTION or OFF, if supported. Returns
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* -EINVAL if the powerdomain pointer is null or the target power
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* state is not not supported, or returns 0 upon success.
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*/
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int pwrdm_set_logic_retst(struct powerdomain *pwrdm, u8 pwrst)
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{
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@ -512,13 +514,14 @@ int pwrdm_set_logic_retst(struct powerdomain *pwrdm, u8 pwrst)
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* @bank: memory bank number to set (0-3)
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* @pwrst: one of the PWRDM_POWER_* macros
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*
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* Set the next power state that memory bank x of the powerdomain
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* pwrdm will enter when the powerdomain enters the ON state. Bank
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* will be a number from 0 to 3, and represents different types of
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* memory, depending on the powerdomain. Returns -EINVAL if the
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* powerdomain pointer is null or the target power state is not not
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* supported for this memory bank, -EEXIST if the target memory bank
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* does not exist or is not controllable, or returns 0 upon success.
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* Set the next power state @pwrst that memory bank @bank of the
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* powerdomain @pwrdm will enter when the powerdomain enters the ON
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* state. @bank will be a number from 0 to 3, and represents different
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* types of memory, depending on the powerdomain. Returns -EINVAL if
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* the powerdomain pointer is null or the target power state is not
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* not supported for this memory bank, -EEXIST if the target memory
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* bank does not exist or is not controllable, or returns 0 upon
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* success.
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*/
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int pwrdm_set_mem_onst(struct powerdomain *pwrdm, u8 bank, u8 pwrst)
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{
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@ -575,14 +578,15 @@ int pwrdm_set_mem_onst(struct powerdomain *pwrdm, u8 bank, u8 pwrst)
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* @bank: memory bank number to set (0-3)
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* @pwrst: one of the PWRDM_POWER_* macros
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*
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* Set the next power state that memory bank x of the powerdomain
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* pwrdm will enter when the powerdomain enters the RETENTION state.
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* Bank will be a number from 0 to 3, and represents different types
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* of memory, depending on the powerdomain. pwrst will be either
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* RETENTION or OFF, if supported. Returns -EINVAL if the powerdomain
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* pointer is null or the target power state is not not supported for
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* this memory bank, -EEXIST if the target memory bank does not exist
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* or is not controllable, or returns 0 upon success.
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* Set the next power state @pwrst that memory bank @bank of the
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* powerdomain @pwrdm will enter when the powerdomain enters the
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* RETENTION state. Bank will be a number from 0 to 3, and represents
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* different types of memory, depending on the powerdomain. @pwrst
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* will be either RETENTION or OFF, if supported. Returns -EINVAL if
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* the powerdomain pointer is null or the target power state is not
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* not supported for this memory bank, -EEXIST if the target memory
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* bank does not exist or is not controllable, or returns 0 upon
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* success.
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*/
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int pwrdm_set_mem_retst(struct powerdomain *pwrdm, u8 bank, u8 pwrst)
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{
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@ -637,10 +641,10 @@ int pwrdm_set_mem_retst(struct powerdomain *pwrdm, u8 bank, u8 pwrst)
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* pwrdm_read_logic_pwrst - get current powerdomain logic retention power state
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* @pwrdm: struct powerdomain * to get current logic retention power state
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*
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* Return the current power state that the logic portion of
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* powerdomain pwrdm will enter
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* Returns -EINVAL if the powerdomain pointer is null or returns the
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* current logic retention power state upon success.
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* Return the power state that the logic portion of powerdomain @pwrdm
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* will enter when the powerdomain enters retention. Returns -EINVAL
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* if the powerdomain pointer is null or returns the logic retention
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* power state upon success.
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*/
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int pwrdm_read_logic_pwrst(struct powerdomain *pwrdm)
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{
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@ -655,9 +659,9 @@ int pwrdm_read_logic_pwrst(struct powerdomain *pwrdm)
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* pwrdm_read_prev_logic_pwrst - get previous powerdomain logic power state
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* @pwrdm: struct powerdomain * to get previous logic power state
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*
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* Return the powerdomain pwrdm's logic power state. Returns -EINVAL
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* if the powerdomain pointer is null or returns the previous logic
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* power state upon success.
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* Return the powerdomain @pwrdm's previous logic power state. Returns
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||||
* -EINVAL if the powerdomain pointer is null or returns the previous
|
||||
* logic power state upon success.
|
||||
*/
|
||||
int pwrdm_read_prev_logic_pwrst(struct powerdomain *pwrdm)
|
||||
{
|
||||
@ -679,8 +683,8 @@ int pwrdm_read_prev_logic_pwrst(struct powerdomain *pwrdm)
|
||||
* @pwrdm: struct powerdomain * to get current memory bank power state
|
||||
* @bank: memory bank number (0-3)
|
||||
*
|
||||
* Return the powerdomain pwrdm's current memory power state for bank
|
||||
* x. Returns -EINVAL if the powerdomain pointer is null, -EEXIST if
|
||||
* Return the powerdomain @pwrdm's current memory power state for bank
|
||||
* @bank. Returns -EINVAL if the powerdomain pointer is null, -EEXIST if
|
||||
* the target memory bank does not exist or is not controllable, or
|
||||
* returns the current memory power state upon success.
|
||||
*/
|
||||
@ -733,10 +737,11 @@ int pwrdm_read_mem_pwrst(struct powerdomain *pwrdm, u8 bank)
|
||||
* @pwrdm: struct powerdomain * to get previous memory bank power state
|
||||
* @bank: memory bank number (0-3)
|
||||
*
|
||||
* Return the powerdomain pwrdm's previous memory power state for bank
|
||||
* x. Returns -EINVAL if the powerdomain pointer is null, -EEXIST if
|
||||
* the target memory bank does not exist or is not controllable, or
|
||||
* returns the previous memory power state upon success.
|
||||
* Return the powerdomain @pwrdm's previous memory power state for
|
||||
* bank @bank. Returns -EINVAL if the powerdomain pointer is null,
|
||||
* -EEXIST if the target memory bank does not exist or is not
|
||||
* controllable, or returns the previous memory power state upon
|
||||
* success.
|
||||
*/
|
||||
int pwrdm_read_prev_mem_pwrst(struct powerdomain *pwrdm, u8 bank)
|
||||
{
|
||||
@ -783,10 +788,10 @@ int pwrdm_read_prev_mem_pwrst(struct powerdomain *pwrdm, u8 bank)
|
||||
* pwrdm_clear_all_prev_pwrst - clear previous powerstate register for a pwrdm
|
||||
* @pwrdm: struct powerdomain * to clear
|
||||
*
|
||||
* Clear the powerdomain's previous power state register. Clears the
|
||||
* entire register, including logic and memory bank previous power states.
|
||||
* Returns -EINVAL if the powerdomain pointer is null, or returns 0 upon
|
||||
* success.
|
||||
* Clear the powerdomain's previous power state register @pwrdm.
|
||||
* Clears the entire register, including logic and memory bank
|
||||
* previous power states. Returns -EINVAL if the powerdomain pointer
|
||||
* is null, or returns 0 upon success.
|
||||
*/
|
||||
int pwrdm_clear_all_prev_pwrst(struct powerdomain *pwrdm)
|
||||
{
|
||||
@ -811,11 +816,11 @@ int pwrdm_clear_all_prev_pwrst(struct powerdomain *pwrdm)
|
||||
* @pwrdm: struct powerdomain *
|
||||
*
|
||||
* Enable automatic context save-and-restore upon power state change
|
||||
* for some devices in a powerdomain. Warning: this only affects a
|
||||
* subset of devices in a powerdomain; check the TRM closely. Returns
|
||||
* -EINVAL if the powerdomain pointer is null or if the powerdomain
|
||||
* does not support automatic save-and-restore, or returns 0 upon
|
||||
* success.
|
||||
* for some devices in the powerdomain @pwrdm. Warning: this only
|
||||
* affects a subset of devices in a powerdomain; check the TRM
|
||||
* closely. Returns -EINVAL if the powerdomain pointer is null or if
|
||||
* the powerdomain does not support automatic save-and-restore, or
|
||||
* returns 0 upon success.
|
||||
*/
|
||||
int pwrdm_enable_hdwr_sar(struct powerdomain *pwrdm)
|
||||
{
|
||||
@ -839,11 +844,11 @@ int pwrdm_enable_hdwr_sar(struct powerdomain *pwrdm)
|
||||
* @pwrdm: struct powerdomain *
|
||||
*
|
||||
* Disable automatic context save-and-restore upon power state change
|
||||
* for some devices in a powerdomain. Warning: this only affects a
|
||||
* subset of devices in a powerdomain; check the TRM closely. Returns
|
||||
* -EINVAL if the powerdomain pointer is null or if the powerdomain
|
||||
* does not support automatic save-and-restore, or returns 0 upon
|
||||
* success.
|
||||
* for some devices in the powerdomain @pwrdm. Warning: this only
|
||||
* affects a subset of devices in a powerdomain; check the TRM
|
||||
* closely. Returns -EINVAL if the powerdomain pointer is null or if
|
||||
* the powerdomain does not support automatic save-and-restore, or
|
||||
* returns 0 upon success.
|
||||
*/
|
||||
int pwrdm_disable_hdwr_sar(struct powerdomain *pwrdm)
|
||||
{
|
||||
@ -866,7 +871,7 @@ int pwrdm_disable_hdwr_sar(struct powerdomain *pwrdm)
|
||||
* pwrdm_has_hdwr_sar - test whether powerdomain supports hardware SAR
|
||||
* @pwrdm: struct powerdomain *
|
||||
*
|
||||
* Returns 1 if powerdomain 'pwrdm' supports hardware save-and-restore
|
||||
* Returns 1 if powerdomain @pwrdm supports hardware save-and-restore
|
||||
* for some devices, or 0 if it does not.
|
||||
*/
|
||||
bool pwrdm_has_hdwr_sar(struct powerdomain *pwrdm)
|
||||
@ -878,7 +883,7 @@ bool pwrdm_has_hdwr_sar(struct powerdomain *pwrdm)
|
||||
* pwrdm_wait_transition - wait for powerdomain power transition to finish
|
||||
* @pwrdm: struct powerdomain * to wait for
|
||||
*
|
||||
* If the powerdomain pwrdm is in the process of a state transition,
|
||||
* If the powerdomain @pwrdm is in the process of a state transition,
|
||||
* spin until it completes the power transition, or until an iteration
|
||||
* bailout value is reached. Returns -EINVAL if the powerdomain
|
||||
* pointer is null, -EAGAIN if the bailout value was reached, or
|
||||
|
||||
@ -40,86 +40,77 @@
|
||||
#define OMAP34XX_CLKSTCTRL_FORCE_WAKEUP 0x2
|
||||
#define OMAP34XX_CLKSTCTRL_ENABLE_AUTO 0x3
|
||||
|
||||
/*
|
||||
* struct clkdm_autodep - a clockdomain that should have wkdeps
|
||||
* and sleepdeps added when a clockdomain should stay active in hwsup mode;
|
||||
* and conversely, removed when the clockdomain should be allowed to go
|
||||
* inactive in hwsup mode.
|
||||
/**
|
||||
* struct clkdm_autodep - clkdm deps to add when entering/exiting hwsup mode
|
||||
* @clkdm: clockdomain to add wkdep+sleepdep on - set name member only
|
||||
* @omap_chip: OMAP chip types that this autodep is valid on
|
||||
*
|
||||
* A clockdomain that should have wkdeps and sleepdeps added when a
|
||||
* clockdomain should stay active in hwsup mode; and conversely,
|
||||
* removed when the clockdomain should be allowed to go inactive in
|
||||
* hwsup mode.
|
||||
*
|
||||
* Autodeps are deprecated and should be removed after
|
||||
* omap_hwmod-based fine-grained module idle control is added.
|
||||
*/
|
||||
struct clkdm_autodep {
|
||||
|
||||
union {
|
||||
/* Name of the clockdomain to add a wkdep/sleepdep on */
|
||||
const char *name;
|
||||
|
||||
/* Clockdomain pointer (looked up at clkdm_init() time) */
|
||||
struct clockdomain *ptr;
|
||||
} clkdm;
|
||||
|
||||
/* OMAP chip types that this clockdomain dep is valid on */
|
||||
const struct omap_chip_id omap_chip;
|
||||
|
||||
};
|
||||
|
||||
/* Encodes dependencies between clockdomains - statically defined */
|
||||
/**
|
||||
* struct clkdm_dep - encode dependencies between clockdomains
|
||||
* @clkdm_name: clockdomain name
|
||||
* @clkdm: pointer to the struct clockdomain of @clkdm_name
|
||||
* @omap_chip: OMAP chip types that this dependency is valid on
|
||||
* @wkdep_usecount: Number of wakeup dependencies causing this clkdm to wake
|
||||
* @sleepdep_usecount: Number of sleep deps that could prevent clkdm from idle
|
||||
*
|
||||
* Statically defined. @clkdm is resolved from @clkdm_name at runtime and
|
||||
* should not be pre-initialized.
|
||||
*
|
||||
* XXX Should also include hardware (fixed) dependencies.
|
||||
*/
|
||||
struct clkdm_dep {
|
||||
|
||||
/* Clockdomain name */
|
||||
const char *clkdm_name;
|
||||
|
||||
/* Clockdomain pointer - resolved by the clockdomain code */
|
||||
struct clockdomain *clkdm;
|
||||
|
||||
/* Number of wakeup dependencies causing this clkdm to wake */
|
||||
atomic_t wkdep_usecount;
|
||||
|
||||
/* Number of sleep dependencies that could prevent clkdm from idle */
|
||||
atomic_t sleepdep_usecount;
|
||||
|
||||
/* Flags to mark OMAP chip restrictions, etc. */
|
||||
const struct omap_chip_id omap_chip;
|
||||
|
||||
};
|
||||
|
||||
/**
|
||||
* struct clockdomain - OMAP clockdomain
|
||||
* @name: clockdomain name
|
||||
* @pwrdm: powerdomain containing this clockdomain
|
||||
* @clktrctrl_reg: CLKSTCTRL reg for the given clock domain
|
||||
* @clktrctrl_mask: CLKTRCTRL/AUTOSTATE field mask in CM_CLKSTCTRL reg
|
||||
* @flags: Clockdomain capability flags
|
||||
* @dep_bit: Bit shift of this clockdomain's PM_WKDEP/CM_SLEEPDEP bit
|
||||
* @wkdep_srcs: Clockdomains that can be told to wake this powerdomain up
|
||||
* @sleepdep_srcs: Clockdomains that can be told to keep this clkdm from inact
|
||||
* @omap_chip: OMAP chip types that this clockdomain is valid on
|
||||
* @usecount: Usecount tracking
|
||||
* @node: list_head to link all clockdomains together
|
||||
*/
|
||||
struct clockdomain {
|
||||
|
||||
/* Clockdomain name */
|
||||
const char *name;
|
||||
|
||||
union {
|
||||
/* Powerdomain enclosing this clockdomain */
|
||||
const char *name;
|
||||
|
||||
/* Powerdomain pointer assigned at clkdm_register() */
|
||||
struct powerdomain *ptr;
|
||||
} pwrdm;
|
||||
|
||||
/* CLKSTCTRL reg for the given clock domain*/
|
||||
void __iomem *clkstctrl_reg;
|
||||
|
||||
/* CLKTRCTRL/AUTOSTATE field mask in CM_CLKSTCTRL reg */
|
||||
const u16 clktrctrl_mask;
|
||||
|
||||
/* Clockdomain capability flags */
|
||||
const u8 flags;
|
||||
|
||||
/* Bit shift of this clockdomain's PM_WKDEP/CM_SLEEPDEP bit */
|
||||
const u8 dep_bit;
|
||||
|
||||
/* Clockdomains that can be told to wake this powerdomain up */
|
||||
struct clkdm_dep *wkdep_srcs;
|
||||
|
||||
/* Clockdomains that can be told to keep this clkdm from inactivity */
|
||||
struct clkdm_dep *sleepdep_srcs;
|
||||
|
||||
/* OMAP chip types that this clockdomain is valid on */
|
||||
const struct omap_chip_id omap_chip;
|
||||
|
||||
/* Usecount tracking */
|
||||
atomic_t usecount;
|
||||
|
||||
struct list_head node;
|
||||
|
||||
};
|
||||
|
||||
void clkdm_init(struct clockdomain **clkdms, struct clkdm_autodep *autodeps);
|
||||
|
||||
@ -68,40 +68,36 @@
|
||||
struct clockdomain;
|
||||
struct powerdomain;
|
||||
|
||||
/**
|
||||
* struct powerdomain - OMAP powerdomain
|
||||
* @name: Powerdomain name
|
||||
* @omap_chip: represents the OMAP chip types containing this pwrdm
|
||||
* @prcm_offs: the address offset from CM_BASE/PRM_BASE
|
||||
* @pwrsts: Possible powerdomain power states
|
||||
* @pwrsts_logic_ret: Possible logic power states when pwrdm in RETENTION
|
||||
* @flags: Powerdomain flags
|
||||
* @banks: Number of software-controllable memory banks in this powerdomain
|
||||
* @pwrsts_mem_ret: Possible memory bank pwrstates when pwrdm in RETENTION
|
||||
* @pwrsts_mem_on: Possible memory bank pwrstates when pwrdm in ON
|
||||
* @pwrdm_clkdms: Clockdomains in this powerdomain
|
||||
* @node: list_head linking all powerdomains
|
||||
* @state:
|
||||
* @state_counter:
|
||||
* @timer:
|
||||
* @state_timer:
|
||||
*/
|
||||
struct powerdomain {
|
||||
|
||||
/* Powerdomain name */
|
||||
const char *name;
|
||||
|
||||
/* Used to represent the OMAP chip types containing this pwrdm */
|
||||
const struct omap_chip_id omap_chip;
|
||||
|
||||
/* the address offset from CM_BASE/PRM_BASE */
|
||||
const s16 prcm_offs;
|
||||
|
||||
/* Possible powerdomain power states */
|
||||
const u8 pwrsts;
|
||||
|
||||
/* Possible logic power states when pwrdm in RETENTION */
|
||||
const u8 pwrsts_logic_ret;
|
||||
|
||||
/* Powerdomain flags */
|
||||
const u8 flags;
|
||||
|
||||
/* Number of software-controllable memory banks in this powerdomain */
|
||||
const u8 banks;
|
||||
|
||||
/* Possible memory bank pwrstates when pwrdm in RETENTION */
|
||||
const u8 pwrsts_mem_ret[PWRDM_MAX_MEM_BANKS];
|
||||
|
||||
/* Possible memory bank pwrstates when pwrdm is ON */
|
||||
const u8 pwrsts_mem_on[PWRDM_MAX_MEM_BANKS];
|
||||
|
||||
/* Clockdomains in this powerdomain */
|
||||
struct clockdomain *pwrdm_clkdms[PWRDM_MAX_CLKDMS];
|
||||
|
||||
struct list_head node;
|
||||
|
||||
int state;
|
||||
unsigned state_counter[PWRDM_MAX_PWRSTS];
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user