Re: [PATCH 6/7] PM / OPP: Get performance state using genpd helper

From: Ulf Hansson
Date: Thu Mar 22 2018 - 05:32:22 EST


On 22 December 2017 at 08:26, Viresh Kumar <viresh.kumar@xxxxxxxxxx> wrote:
> The genpd core provides an API now to retrieve the performance state
> from DT, use that instead of the ->get_pstate() callback.
>
> Signed-off-by: Viresh Kumar <viresh.kumar@xxxxxxxxxx>

Reviewed-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx>

Kind regards
Uffe

> ---
> drivers/opp/core.c | 3 ---
> drivers/opp/of.c | 20 +++++++++++++++++++-
> 2 files changed, 19 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/opp/core.c b/drivers/opp/core.c
> index bfcad8983fd1..6194219fb95f 100644
> --- a/drivers/opp/core.c
> +++ b/drivers/opp/core.c
> @@ -1034,9 +1034,6 @@ int _opp_add(struct device *dev, struct dev_pm_opp *new_opp,
> return ret;
> }
>
> - if (opp_table->get_pstate)
> - new_opp->pstate = opp_table->get_pstate(dev, new_opp->rate);
> -
> list_add(&new_opp->node, head);
> mutex_unlock(&opp_table->lock);
>
> diff --git a/drivers/opp/of.c b/drivers/opp/of.c
> index 2d1bb348ae73..21265af55117 100644
> --- a/drivers/opp/of.c
> +++ b/drivers/opp/of.c
> @@ -17,6 +17,7 @@
> #include <linux/errno.h>
> #include <linux/device.h>
> #include <linux/of_device.h>
> +#include <linux/pm_domain.h>
> #include <linux/slab.h>
> #include <linux/export.h>
>
> @@ -321,6 +322,8 @@ static int _opp_add_static_v2(struct opp_table *opp_table, struct device *dev,
> if (!of_property_read_u32(np, "clock-latency-ns", &val))
> new_opp->clock_latency_ns = val;
>
> + new_opp->pstate = of_dev_pm_genpd_get_performance_state(dev, np);
> +
> ret = opp_parse_supplies(new_opp, dev, opp_table);
> if (ret)
> goto free_opp;
> @@ -371,7 +374,8 @@ static int _of_add_opp_table_v2(struct device *dev, struct device_node *opp_np)
> {
> struct device_node *np;
> struct opp_table *opp_table;
> - int ret = 0, count = 0;
> + int ret = 0, count = 0, pstate_count = 0;
> + struct dev_pm_opp *opp;
>
> opp_table = _managed_opp(opp_np);
> if (opp_table) {
> @@ -405,6 +409,20 @@ static int _of_add_opp_table_v2(struct device *dev, struct device_node *opp_np)
> goto put_opp_table;
> }
>
> + list_for_each_entry(opp, &opp_table->opp_list, node)
> + pstate_count += !!opp->pstate;
> +
> + /* Either all or none of the nodes shall have performance state set */
> + if (pstate_count && pstate_count != count) {
> + dev_err(dev, "Not all nodes have performance state set (%d: %d)\n",
> + count, pstate_count);
> + ret = -ENOENT;
> + goto put_opp_table;
> + }
> +
> + if (pstate_count)
> + opp_table->genpd_performance_state = true;
> +
> opp_table->np = opp_np;
> if (of_property_read_bool(opp_np, "opp-shared"))
> opp_table->shared_opp = OPP_TABLE_ACCESS_SHARED;
> --
> 2.15.0.194.g9af6a3dea062
>