Re: [PATCH 02/18] ACPI: platform_profile: Add `choices` to platform_profile_ops

Mario Limonciello
2025-01-09T16:32:30Z

On 1/9/2025 09:06, Kurt Borja wrote:
> Add a `choices` callback to platform_profile_ops, which lets drivers
> specify how to select available profiles.
>
> Signed-off-by: Kurt Borja <kuurtb@gmail.com>
> ---
> drivers/acpi/platform_profile.c | 13 +++++++--
> .../surface/surface_platform_profile.c | 16 ++++++----
> drivers/platform/x86/acer-wmi.c | 24 ++++++++-------
> drivers/platform/x86/amd/pmf/sps.c | 15 ++++++----
> drivers/platform/x86/asus-wmi.c | 16 ++++++----
> drivers/platform/x86/dell/alienware-wmi.c | 24 +++++++++------
> drivers/platform/x86/dell/dell-pc.c | 26 ++++++++++-------
> drivers/platform/x86/hp/hp-wmi.c | 29 +++++++++++++------
> drivers/platform/x86/ideapad-laptop.c | 15 ++++++----
> .../platform/x86/inspur_platform_profile.c | 14 ++++++---
> drivers/platform/x86/thinkpad_acpi.c | 15 ++++++----
> include/linux/platform_profile.h | 1 +
> 12 files changed, 137 insertions(+), 71 deletions(-)
>
> diff --git a/drivers/acpi/platform_profile.c b/drivers/acpi/platform_profile.c
> index 39a22e27acc5..9cb82173947c 100644
> --- a/drivers/acpi/platform_profile.c
> +++ b/drivers/acpi/platform_profile.c
> @@ -464,12 +464,21 @@ int platform_profile_register(struct platform_profile_handler *pprof)
> int err;
>
> /* Sanity check the profile handler */
> - if (!pprof || bitmap_empty(pprof->choices, PLATFORM_PROFILE_LAST) ||
> - !pprof->ops->profile_set || !pprof->ops->profile_get) {
> + if (!pprof || !pprof->ops->profile_set || !pprof->ops->profile_get ||
> + !pprof->ops->choices) {
> pr_err("platform_profile: handler is invalid\n");
> return -EINVAL;
> }
>
> + err = pprof->ops->choices(pprof);
> + if (err < 0)
> + return err;
> +
> + if (bitmap_empty(pprof->choices, PLATFORM_PROFILE_LAST)) {
> + pr_err("platform_profile: no available profiles\n");
> + return -EINVAL;
> + }
> +
> guard(mutex)(&profile_lock);
>
> /* create class interface for individual handler */
> diff --git a/drivers/platform/surface/surface_platform_profile.c b/drivers/platform/surface/surface_platform_profile.c
> index 2a9716372d56..b69fcc4c3858 100644
> --- a/drivers/platform/surface/surface_platform_profile.c
> +++ b/drivers/platform/surface/surface_platform_profile.c
> @@ -201,9 +201,20 @@ static int ssam_platform_profile_set(struct platform_profile_handler *pprof,
> return tp;
> }
>
> +static int ssam_platform_profile_choices(struct platform_profile_handler *pprof)
> +{
> + set_bit(PLATFORM_PROFILE_LOW_POWER, pprof->choices);
> + set_bit(PLATFORM_PROFILE_BALANCED, pprof->choices);
> + set_bit(PLATFORM_PROFILE_BALANCED_PERFORMANCE, pprof->choices);
> + set_bit(PLATFORM_PROFILE_PERFORMANCE, pprof->choices);
> +
> + return 0;

At first I didn't really like the callback, but it grew on me and I
realized why I didn't like it is because it's confusing that the
callback is called .choices() as well as the implementation used is
called .choices.

If anything it should be "set_choices" or "probe" with a slight leaning
on probe()..

With probe the flow could be:

driver()
->platform_profile_register(ops)
->->drivers's implementation for platform_profile_probe()

> +}
> +
> static const struct platform_profile_ops ssam_platform_profile_ops = {
> .profile_get = ssam_platform_profile_get,
> .profile_set = ssam_platform_profile_set,
> + .choices = ssam_platform_profile_choices,
> };
>
> static int surface_platform_profile_probe(struct ssam_device *sdev)
> @@ -223,11 +234,6 @@ static int surface_platform_profile_probe(struct ssam_device *sdev)
>
> tpd->has_fan = device_property_read_bool(&sdev->dev, "has_fan");
>
> - set_bit(PLATFORM_PROFILE_LOW_POWER, tpd->handler.choices);
> - set_bit(PLATFORM_PROFILE_BALANCED, tpd->handler.choices);
> - set_bit(PLATFORM_PROFILE_BALANCED_PERFORMANCE, tpd->handler.choices);
> - set_bit(PLATFORM_PROFILE_PERFORMANCE, tpd->handler.choices);
> -
> return platform_profile_register(&tpd->handler);
> }
>
> diff --git a/drivers/platform/x86/acer-wmi.c b/drivers/platform/x86/acer-wmi.c
> index ac7b3ab8fd2a..1fa0cd69da8c 100644
> --- a/drivers/platform/x86/acer-wmi.c
> +++ b/drivers/platform/x86/acer-wmi.c
> @@ -1900,9 +1900,22 @@ acer_predator_v4_platform_profile_set(struct platform_profile_handler *pprof,
> return 0;
> }
>
> +static int
> +acer_predator_v4_platform_profile_choices(struct platform_profile_handler *pprof)
> +{
> + set_bit(PLATFORM_PROFILE_PERFORMANCE, pprof->choices);
> + set_bit(PLATFORM_PROFILE_BALANCED_PERFORMANCE, pprof->choices);
> + set_bit(PLATFORM_PROFILE_BALANCED, pprof->choices);
> + set_bit(PLATFORM_PROFILE_QUIET, pprof->choices);
> + set_bit(PLATFORM_PROFILE_LOW_POWER, pprof->choices);
> +
> + return 0;
> +}
> +
> static const struct platform_profile_ops acer_predator_v4_platform_profile_ops = {
> .profile_get = acer_predator_v4_platform_profile_get,
> .profile_set = acer_predator_v4_platform_profile_set,
> + .choices = acer_predator_v4_platform_profile_choices,
> };
>
> static int acer_platform_profile_setup(struct platform_device *device)
> @@ -1915,17 +1928,6 @@ static int acer_platform_profile_setup(struct platform_device *device)
> platform_profile_handler.ops =
> &acer_predator_v4_platform_profile_ops;
>
> - set_bit(PLATFORM_PROFILE_PERFORMANCE,
> - platform_profile_handler.choices);
> - set_bit(PLATFORM_PROFILE_BALANCED_PERFORMANCE,
> - platform_profile_handler.choices);
> - set_bit(PLATFORM_PROFILE_BALANCED,
> - platform_profile_handler.choices);
> - set_bit(PLATFORM_PROFILE_QUIET,
> - platform_profile_handler.choices);
> - set_bit(PLATFORM_PROFILE_LOW_POWER,
> - platform_profile_handler.choices);
> -
> err = platform_profile_register(&platform_profile_handler);
> if (err)
> return err;
> diff --git a/drivers/platform/x86/amd/pmf/sps.c b/drivers/platform/x86/amd/pmf/sps.c
> index 7c8391ac4dbb..37316bc3e071 100644
> --- a/drivers/platform/x86/amd/pmf/sps.c
> +++ b/drivers/platform/x86/amd/pmf/sps.c
> @@ -387,9 +387,19 @@ static int amd_pmf_profile_set(struct platform_profile_handler *pprof,
> return 0;
> }
>
> +static int amd_pmf_profile_choices(struct platform_profile_handler *pprof)
> +{
> + set_bit(PLATFORM_PROFILE_LOW_POWER, pprof->choices);
> + set_bit(PLATFORM_PROFILE_BALANCED, pprof->choices);
> + set_bit(PLATFORM_PROFILE_PERFORMANCE, pprof->choices);
> +
> + return 0;
> +}
> +
> static const struct platform_profile_ops amd_pmf_profile_ops = {
> .profile_get = amd_pmf_profile_get,
> .profile_set = amd_pmf_profile_set,
> + .choices = amd_pmf_profile_choices,
> };
>
> int amd_pmf_init_sps(struct amd_pmf_dev *dev)
> @@ -414,11 +424,6 @@ int amd_pmf_init_sps(struct amd_pmf_dev *dev)
> dev->pprof.dev = dev->dev;
> dev->pprof.ops = &amd_pmf_profile_ops;
>
> - /* Setup supported modes */
> - set_bit(PLATFORM_PROFILE_LOW_POWER, dev->pprof.choices);
> - set_bit(PLATFORM_PROFILE_BALANCED, dev->pprof.choices);
> - set_bit(PLATFORM_PROFILE_PERFORMANCE, dev->pprof.choices);
> -
> /* Create platform_profile structure and register */
> err = platform_profile_register(&dev->pprof);
> if (err)
> diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
> index ef4129d91656..3e94986078a6 100644
> --- a/drivers/platform/x86/asus-wmi.c
> +++ b/drivers/platform/x86/asus-wmi.c
> @@ -3852,9 +3852,19 @@ static int asus_wmi_platform_profile_set(struct platform_profile_handler *pprof,
> return throttle_thermal_policy_write(asus);
> }
>
> +static int asus_wmi_platform_profile_choices(struct platform_profile_handler *pprof)
> +{
> + set_bit(PLATFORM_PROFILE_QUIET, pprof->choices);
> + set_bit(PLATFORM_PROFILE_BALANCED, pprof->choices);
> + set_bit(PLATFORM_PROFILE_PERFORMANCE, pprof->choices);
> +
> + return 0;
> +}
> +
> static const struct platform_profile_ops asus_wmi_platform_profile_ops = {
> .profile_get = asus_wmi_platform_profile_get,
> .profile_set = asus_wmi_platform_profile_set,
> + .choices = asus_wmi_platform_profile_choices,
> };
>
> static int platform_profile_setup(struct asus_wmi *asus)
> @@ -3885,12 +3895,6 @@ static int platform_profile_setup(struct asus_wmi *asus)
> asus->platform_profile_handler.dev = dev;
> asus->platform_profile_handler.ops = &asus_wmi_platform_profile_ops;
>
> - set_bit(PLATFORM_PROFILE_QUIET, asus->platform_profile_handler.choices);
> - set_bit(PLATFORM_PROFILE_BALANCED,
> - asus->platform_profile_handler.choices);
> - set_bit(PLATFORM_PROFILE_PERFORMANCE,
> - asus->platform_profile_handler.choices);
> -
> err = platform_profile_register(&asus->platform_profile_handler);
> if (err == -EEXIST) {
> pr_warn("%s, a platform_profile handler is already registered\n", __func__);
> diff --git a/drivers/platform/x86/dell/alienware-wmi.c b/drivers/platform/x86/dell/alienware-wmi.c
> index c824414565b6..386b22e9c922 100644
> --- a/drivers/platform/x86/dell/alienware-wmi.c
> +++ b/drivers/platform/x86/dell/alienware-wmi.c
> @@ -1108,12 +1108,7 @@ static int thermal_profile_set(struct platform_profile_handler *pprof,
> return wmax_thermal_control(supported_thermal_profiles[profile]);
> }
>
> -static const struct platform_profile_ops awcc_platform_profile_ops = {
> - .profile_get = thermal_profile_get,
> - .profile_set = thermal_profile_set,
> -};
> -
> -static int create_thermal_profile(struct platform_device *platform_device)
> +static int thermal_profile_choices(struct platform_profile_handler *pprof)
> {
> u32 out_data;
> u8 sys_desc[4];
> @@ -1146,19 +1141,30 @@ static int create_thermal_profile(struct platform_device *platform_device)
> profile = wmax_mode_to_platform_profile[mode];
> supported_thermal_profiles[profile] = out_data;
>
> - set_bit(profile, pp_handler.choices);
> + set_bit(profile, pprof->choices);
> }
>
> - if (bitmap_empty(pp_handler.choices, PLATFORM_PROFILE_LAST))
> + if (bitmap_empty(pprof->choices, PLATFORM_PROFILE_LAST))
> return -ENODEV;
>
> if (quirks->gmode) {
> supported_thermal_profiles[PLATFORM_PROFILE_PERFORMANCE] =
> WMAX_THERMAL_MODE_GMODE;
>
> - set_bit(PLATFORM_PROFILE_PERFORMANCE, pp_handler.choices);
> + set_bit(PLATFORM_PROFILE_PERFORMANCE, pprof->choices);
> }
>
> + return 0;
> +}
> +
> +static const struct platform_profile_ops awcc_platform_profile_ops = {
> + .profile_get = thermal_profile_get,
> + .profile_set = thermal_profile_set,
> + .choices = thermal_profile_choices,
> +};
> +
> +static int create_thermal_profile(struct platform_device *platform_device)
> +{
> pp_handler.name = "alienware-wmi";
> pp_handler.dev = &platform_device->dev;
> pp_handler.ops = &awcc_platform_profile_ops;
> diff --git a/drivers/platform/x86/dell/dell-pc.c b/drivers/platform/x86/dell/dell-pc.c
> index 1751b7235031..ba366c28d9a6 100644
> --- a/drivers/platform/x86/dell/dell-pc.c
> +++ b/drivers/platform/x86/dell/dell-pc.c
> @@ -24,6 +24,7 @@
> #include "dell-smbios.h"
>
> static struct platform_device *platform_device;
> +static int supported_modes;
>
> static const struct dmi_system_id dell_device_table[] __initconst = {
> {
> @@ -231,15 +232,29 @@ static int thermal_platform_profile_get(struct platform_profile_handler *pprof,
> return 0;
> }
>
> +static int thermal_platform_profile_choices(struct platform_profile_handler *pprof)
> +{
> + if (supported_modes & DELL_QUIET)
> + set_bit(PLATFORM_PROFILE_QUIET, pprof->choices);
> + if (supported_modes & DELL_COOL_BOTTOM)
> + set_bit(PLATFORM_PROFILE_COOL, pprof->choices);
> + if (supported_modes & DELL_BALANCED)
> + set_bit(PLATFORM_PROFILE_BALANCED, pprof->choices);
> + if (supported_modes & DELL_PERFORMANCE)
> + set_bit(PLATFORM_PROFILE_PERFORMANCE, pprof->choices);
> +
> + return 0;
> +}
> +
> static const struct platform_profile_ops dell_pc_platform_profile_ops = {
> .profile_get = thermal_platform_profile_get,
> .profile_set = thermal_platform_profile_set,
> + .choices = thermal_platform_profile_choices,
> };
>
> static int thermal_init(void)
> {
> int ret;
> - int supported_modes;
>
> /* If thermal commands are not supported, exit without error */
> if (!dell_smbios_class_is_supported(CLASS_INFO))
> @@ -265,15 +280,6 @@ static int thermal_init(void)
> thermal_handler->dev = &platform_device->dev;
> thermal_handler->ops = &dell_pc_platform_profile_ops;
>
> - if (supported_modes & DELL_QUIET)
> - set_bit(PLATFORM_PROFILE_QUIET, thermal_handler->choices);
> - if (supported_modes & DELL_COOL_BOTTOM)
> - set_bit(PLATFORM_PROFILE_COOL, thermal_handler->choices);
> - if (supported_modes & DELL_BALANCED)
> - set_bit(PLATFORM_PROFILE_BALANCED, thermal_handler->choices);
> - if (supported_modes & DELL_PERFORMANCE)
> - set_bit(PLATFORM_PROFILE_PERFORMANCE, thermal_handler->choices);
> -
> /* Clean up if failed */
> ret = platform_profile_register(thermal_handler);
> if (ret)
> diff --git a/drivers/platform/x86/hp/hp-wmi.c b/drivers/platform/x86/hp/hp-wmi.c
> index c37e44f7606c..3c2d4549eb7f 100644
> --- a/drivers/platform/x86/hp/hp-wmi.c
> +++ b/drivers/platform/x86/hp/hp-wmi.c
> @@ -1488,6 +1488,23 @@ static int platform_profile_victus_set(struct platform_profile_handler *pprof,
> return 0;
> }
>
> +static int hp_wmi_platform_profile_choices(struct platform_profile_handler *pprof)
> +{
> + if (is_omen_thermal_profile()) {
> + set_bit(PLATFORM_PROFILE_COOL, pprof->choices);
> + } else if (is_victus_thermal_profile()) {
> + set_bit(PLATFORM_PROFILE_QUIET, pprof->choices);
> + } else {
> + set_bit(PLATFORM_PROFILE_QUIET, pprof->choices);
> + set_bit(PLATFORM_PROFILE_COOL, pprof->choices);
> + }
> +
> + set_bit(PLATFORM_PROFILE_BALANCED, pprof->choices);
> + set_bit(PLATFORM_PROFILE_PERFORMANCE, pprof->choices);
> +
> + return 0;
> +}
> +
> static int omen_powersource_event(struct notifier_block *nb,
> unsigned long value,
> void *data)
> @@ -1568,16 +1585,19 @@ static inline void omen_unregister_powersource_event_handler(void)
> static const struct platform_profile_ops platform_profile_omen_ops = {
> .profile_get = platform_profile_omen_get,
> .profile_set = platform_profile_omen_set,
> + .choices = hp_wmi_platform_profile_choices,
> };
>
> static const struct platform_profile_ops platform_profile_victus_ops = {
> .profile_get = platform_profile_victus_get,
> .profile_set = platform_profile_victus_set,
> + .choices = hp_wmi_platform_profile_choices,
> };
>
> static const struct platform_profile_ops hp_wmi_platform_profile_ops = {
> .profile_get = hp_wmi_platform_profile_get,
> .profile_set = hp_wmi_platform_profile_set,
> + .choices = hp_wmi_platform_profile_choices,
> };
>
> static int thermal_profile_setup(struct platform_device *device)
> @@ -1598,8 +1618,6 @@ static int thermal_profile_setup(struct platform_device *device)
> return err;
>
> platform_profile_handler.ops = &platform_profile_omen_ops;
> -
> - set_bit(PLATFORM_PROFILE_COOL, platform_profile_handler.choices);
> } else if (is_victus_thermal_profile()) {
> err = platform_profile_victus_get_ec(&active_platform_profile);
> if (err < 0)
> @@ -1614,8 +1632,6 @@ static int thermal_profile_setup(struct platform_device *device)
> return err;
>
> platform_profile_handler.ops = &platform_profile_victus_ops;
> -
> - set_bit(PLATFORM_PROFILE_QUIET, platform_profile_handler.choices);
> } else {
> tp = thermal_profile_get();
>
> @@ -1631,15 +1647,10 @@ static int thermal_profile_setup(struct platform_device *device)
> return err;
>
> platform_profile_handler.ops = &hp_wmi_platform_profile_ops;
> -
> - set_bit(PLATFORM_PROFILE_QUIET, platform_profile_handler.choices);
> - set_bit(PLATFORM_PROFILE_COOL, platform_profile_handler.choices);
> }
>
> platform_profile_handler.name = "hp-wmi";
> platform_profile_handler.dev = &device->dev;
> - set_bit(PLATFORM_PROFILE_BALANCED, platform_profile_handler.choices);
> - set_bit(PLATFORM_PROFILE_PERFORMANCE, platform_profile_handler.choices);
>
> err = platform_profile_register(&platform_profile_handler);
> if (err)
> diff --git a/drivers/platform/x86/ideapad-laptop.c b/drivers/platform/x86/ideapad-laptop.c
> index b49ee94f9bee..f5ea03763a54 100644
> --- a/drivers/platform/x86/ideapad-laptop.c
> +++ b/drivers/platform/x86/ideapad-laptop.c
> @@ -1023,6 +1023,15 @@ static int dytc_profile_set(struct platform_profile_handler *pprof,
> return -EINTR;
> }
>
> +static int dytc_profile_choices(struct platform_profile_handler *pprof)
> +{
> + set_bit(PLATFORM_PROFILE_LOW_POWER, pprof->choices);
> + set_bit(PLATFORM_PROFILE_BALANCED, pprof->choices);
> + set_bit(PLATFORM_PROFILE_PERFORMANCE, pprof->choices);
> +
> + return 0;
> +}
> +
> static void dytc_profile_refresh(struct ideapad_private *priv)
> {
> enum platform_profile_option profile;
> @@ -1066,6 +1075,7 @@ static const struct dmi_system_id ideapad_dytc_v4_allow_table[] = {
> static const struct platform_profile_ops dytc_profile_ops = {
> .profile_get = dytc_profile_get,
> .profile_set = dytc_profile_set,
> + .choices = dytc_profile_choices,
> };
>
> static int ideapad_dytc_profile_init(struct ideapad_private *priv)
> @@ -1112,11 +1122,6 @@ static int ideapad_dytc_profile_init(struct ideapad_private *priv)
> priv->dytc->priv = priv;
> priv->dytc->pprof.ops = &dytc_profile_ops;
>
> - /* Setup supported modes */
> - set_bit(PLATFORM_PROFILE_LOW_POWER, priv->dytc->pprof.choices);
> - set_bit(PLATFORM_PROFILE_BALANCED, priv->dytc->pprof.choices);
> - set_bit(PLATFORM_PROFILE_PERFORMANCE, priv->dytc->pprof.choices);
> -
> /* Create platform_profile structure and register */
> err = platform_profile_register(&priv->dytc->pprof);
> if (err)
> diff --git a/drivers/platform/x86/inspur_platform_profile.c b/drivers/platform/x86/inspur_platform_profile.c
> index 38d4745f6be1..8fa9308d4686 100644
> --- a/drivers/platform/x86/inspur_platform_profile.c
> +++ b/drivers/platform/x86/inspur_platform_profile.c
> @@ -166,9 +166,19 @@ static int inspur_platform_profile_get(struct platform_profile_handler *pprof,
> return 0;
> }
>
> +static int inspur_platform_profile_choices(struct platform_profile_handler *pprof)
> +{
> + set_bit(PLATFORM_PROFILE_LOW_POWER, pprof->choices);
> + set_bit(PLATFORM_PROFILE_BALANCED, pprof->choices);
> + set_bit(PLATFORM_PROFILE_PERFORMANCE, pprof->choices);
> +
> + return 0;
> +}
> +
> static const struct platform_profile_ops inspur_platform_profile_ops = {
> .profile_get = inspur_platform_profile_get,
> .profile_set = inspur_platform_profile_set,
> + .choices = inspur_platform_profile_choices,
> };
>
> static int inspur_wmi_probe(struct wmi_device *wdev, const void *context)
> @@ -186,10 +196,6 @@ static int inspur_wmi_probe(struct wmi_device *wdev, const void *context)
> priv->handler.dev = &wdev->dev;
> priv->handler.ops = &inspur_platform_profile_ops;
>
> - set_bit(PLATFORM_PROFILE_LOW_POWER, priv->handler.choices);
> - set_bit(PLATFORM_PROFILE_BALANCED, priv->handler.choices);
> - set_bit(PLATFORM_PROFILE_PERFORMANCE, priv->handler.choices);
> -
> return platform_profile_register(&priv->handler);
> }
>
> diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
> index 04a292af2bfc..a35453c3c605 100644
> --- a/drivers/platform/x86/thinkpad_acpi.c
> +++ b/drivers/platform/x86/thinkpad_acpi.c
> @@ -10538,9 +10538,19 @@ static int dytc_profile_set(struct platform_profile_handler *pprof,
> return err;
> }
>
> +static int dytc_profile_choices(struct platform_profile_handler *pprof)
> +{
> + set_bit(PLATFORM_PROFILE_LOW_POWER, pprof->choices);
> + set_bit(PLATFORM_PROFILE_BALANCED, pprof->choices);
> + set_bit(PLATFORM_PROFILE_PERFORMANCE, pprof->choices);
> +
> + return 0;
> +}
> +
> static const struct platform_profile_ops dytc_profile_ops = {
> .profile_get = dytc_profile_get,
> .profile_set = dytc_profile_set,
> + .choices = dytc_profile_choices,
> };
>
> static struct platform_profile_handler dytc_profile = {
> @@ -10584,11 +10594,6 @@ static int tpacpi_dytc_profile_init(struct ibm_init_struct *iibm)
> {
> int err, output;
>
> - /* Setup supported modes */
> - set_bit(PLATFORM_PROFILE_LOW_POWER, dytc_profile.choices);
> - set_bit(PLATFORM_PROFILE_BALANCED, dytc_profile.choices);
> - set_bit(PLATFORM_PROFILE_PERFORMANCE, dytc_profile.choices);
> -
> err = dytc_command(DYTC_CMD_QUERY, &output);
> if (err)
> return err;
> diff --git a/include/linux/platform_profile.h b/include/linux/platform_profile.h
> index a9db95bc360d..972a62be60b2 100644
> --- a/include/linux/platform_profile.h
> +++ b/include/linux/platform_profile.h
> @@ -34,6 +34,7 @@ struct platform_profile_ops {
> enum platform_profile_option *profile);
> int (*profile_set)(struct platform_profile_handler *pprof,
> enum platform_profile_option profile);
> + int (*choices)(struct platform_profile_handler *pprof);
> };
>
> struct platform_profile_handler {