On Thu, Mar 24, 2011 at 1:00 AM, Kevin Hilman <[email protected]> wrote:
> When a powerdomain is registered and it has an associated voltage domain,
> add the powerdomain to the voltagedomain using voltdm_add_pwrdm().
>
> Also add voltagedomain iterator helper functions to iterate over all
> registered voltagedomains and all powerdomains associated with a
> voltagedomain.
>
> Modeled after a similar relationship between clockdomains and powerdomains.
>
> Signed-off-by: Kevin Hilman <[email protected]>
> ---
> arch/arm/mach-omap2/powerdomain.c | 2 +
> arch/arm/mach-omap2/powerdomain.h | 2 +
> arch/arm/mach-omap2/voltage.c | 80
> +++++++++++++++++++++++++++++++++++++
> arch/arm/mach-omap2/voltage.h | 15 +++++++
> 4 files changed, 99 insertions(+), 0 deletions(-)
>
> diff --git a/arch/arm/mach-omap2/powerdomain.c
> b/arch/arm/mach-omap2/powerdomain.c
> index 8fccd4b..224272e 100644
> --- a/arch/arm/mach-omap2/powerdomain.c
> +++ b/arch/arm/mach-omap2/powerdomain.c
> @@ -102,6 +102,8 @@ static int _pwrdm_register(struct powerdomain *pwrdm)
> return -EINVAL;
> }
> pwrdm->voltdm.ptr = voltdm;
> + INIT_LIST_HEAD(&pwrdm->voltdm_node);
> + voltdm_add_pwrdm(voltdm, pwrdm);
>
> list_add(&pwrdm->node, &pwrdm_list);
>
> diff --git a/arch/arm/mach-omap2/powerdomain.h
> b/arch/arm/mach-omap2/powerdomain.h
> index 3a1ec37..6a4f71a 100644
> --- a/arch/arm/mach-omap2/powerdomain.h
> +++ b/arch/arm/mach-omap2/powerdomain.h
> @@ -92,6 +92,7 @@ struct powerdomain;
> * @pwrsts_mem_on: Possible memory bank pwrstates when pwrdm in ON
> * @pwrdm_clkdms: Clockdomains in this powerdomain
> * @node: list_head linking all powerdomains
> + * @voltdm_node: list_head linking all powerdomains in a voltagedomain
> * @state:
> * @state_counter:
> * @timer:
> @@ -116,6 +117,7 @@ struct powerdomain {
> const u8 prcm_partition;
> struct clockdomain *pwrdm_clkdms[PWRDM_MAX_CLKDMS];
> struct list_head node;
> + struct list_head voltdm_node;
> int state;
> unsigned state_counter[PWRDM_MAX_PWRSTS];
> unsigned ret_logic_off_counter;
> diff --git a/arch/arm/mach-omap2/voltage.c b/arch/arm/mach-omap2/voltage.c
> index bc944ff..b1b5e38 100644
> --- a/arch/arm/mach-omap2/voltage.c
> +++ b/arch/arm/mach-omap2/voltage.c
> @@ -36,6 +36,7 @@
> #include "control.h"
>
> #include "voltage.h"
> +#include "powerdomain.h"
>
> #include "vc.h"
> #include "vp.h"
> @@ -1085,11 +1086,90 @@ static struct voltagedomain *_voltdm_lookup(const
> char *name)
> return voltdm;
> }
>
> +/**
> + * voltdm_add_pwrdm - add a powerdomain to a voltagedomain
> + * @voltdm: struct voltagedomain * to add the powerdomain to
> + * @pwrdm: struct powerdomain * to associate with a voltagedomain
> + *
> + * Associate the powerdomain @pwrdm with a voltagedomain @voltdm. This
> + * enables the use of voltdm_for_each_pwrdm(). Returns -EINVAL if
> + * presented with invalid pointers; -ENOMEM if memory could not be allocated;
> + * or 0 upon success.
> + */
> +int voltdm_add_pwrdm(struct voltagedomain *voltdm, struct powerdomain *pwrdm)
> +{
> + if (!voltdm || !pwrdm)
> + return -EINVAL;
> +
> + pr_debug("voltagedomain: associating powerdomain %s with
> voltagedomain "
> + "%s\n", pwrdm->name, voltdm->name);
> +
> + list_add(&pwrdm->voltdm_node, &voltdm->pwrdm_list);
> +
> + return 0;
> +}
> +
> +/**
> + * voltdm_for_each_pwrdm - call function for each pwrdm in a voltdm
> + * @voltdm: struct voltagedomain * to iterate over
> + * @fn: callback function *
> + *
> + * Call the supplied function @fn for each powerdomain in the
> + * voltagedomain @voltdm. Returns -EINVAL if presented with invalid
> + * pointers; or passes along the last return value of the callback
> + * function, which should be 0 for success or anything else to
> + * indicate failure.
> + */
> +int voltdm_for_each_pwrdm(struct voltagedomain *voltdm,
> + int (*fn)(struct voltagedomain *voltdm,
> + struct powerdomain *pwrdm))
> +{
> + struct powerdomain *pwrdm;
> + int ret = 0;
> +
> + if (!fn)
> + return -EINVAL;
> +
> + list_for_each_entry(pwrdm, &voltdm->pwrdm_list, voltdm_node)
> + ret = (*fn)(voltdm, pwrdm);
> +
> + return ret;
> +}
> +
> +/**
> + * voltdm_for_each - call function on each registered voltagedomain
> + * @fn: callback function *
> + *
> + * Call the supplied function @fn for each registered voltagedomain.
> + * The callback function @fn can return anything but 0 to bail out
> + * early from the iterator. Returns the last return value of the
> + * callback function, which should be 0 for success or anything else
> + * to indicate failure; or -EINVAL if the function pointer is null.
The function description does not match the prototype.
> + */
> +int voltdm_for_each(int (*fn)(struct voltagedomain *voltdm, void *user),
> + void *user)
> +{
> + struct voltagedomain *temp_voltdm;
> + int ret = 0;
> +
> + if (!fn)
> + return -EINVAL;
> +
> + list_for_each_entry(temp_voltdm, &voltdm_list, node) {
> + ret = (*fn)(temp_voltdm, user);
> + if (ret)
> + break;
> + }
> +
> + return ret;
> +}
> +
> static int _voltdm_register(struct voltagedomain *voltdm)
> {
> if (!voltdm || !voltdm->name)
> return -EINVAL;
>
> + INIT_LIST_HEAD(&voltdm->pwrdm_list);
> list_add(&voltdm->node, &voltdm_list);
>
> pr_debug("voltagedomain: registered %s\n", voltdm->name);
> diff --git a/arch/arm/mach-omap2/voltage.h b/arch/arm/mach-omap2/voltage.h
> index 966aa88..df8d234 100644
> --- a/arch/arm/mach-omap2/voltage.h
> +++ b/arch/arm/mach-omap2/voltage.h
> @@ -19,6 +19,13 @@
> #include "vc.h"
> #include "vp.h"
>
> +struct powerdomain;
> +
> +/*
> + * Maximum number of powerdomains that can be associated with a
> voltagedomain.
> + */
> +#define VOLTDM_MAX_PWRDMS 10
This is not used in the patch. Is it needed?
> +
> /* XXX document */
> #define VOLTSCALE_VPFORCEUPDATE 1
> #define VOLTSCALE_VCBYPASS 2
> @@ -55,12 +62,15 @@ struct omap_vfsm_instance_data {
> * @name: Name of the voltage domain which can be used as a unique identifier.
> * @scalable: Whether or not this voltage domain is scalable
> * @node: list_head linking all voltage domains
> + * @pwrdm_node: list_head linking all powerdomains in this voltagedomain
> * @vdd: to be removed
> + * @pwrdms: powerdomains in this voltagedomain
> */
> struct voltagedomain {
> char *name;
> bool scalable;
> struct list_head node;
> + struct list_head pwrdm_list;
> struct omap_vdd_info *vdd;
> };
>
> @@ -187,4 +197,9 @@ extern void omap44xx_voltagedomains_init(void);
> struct voltagedomain *voltdm_lookup(const char *name);
> void voltdm_init(struct voltagedomain **voltdm_list);
> int voltdm_add_pwrdm(struct voltagedomain *voltdm, struct powerdomain
> *pwrdm);
> +int voltdm_for_each(int (*fn)(struct voltagedomain *voltdm, void *user),
> + void *user);
> +int voltdm_for_each_pwrdm(struct voltagedomain *voltdm,
> + int (*fn)(struct voltagedomain *voltdm,
> + struct powerdomain *pwrdm));
> #endif
> --
> 1.7.4
>
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