On Thu, 4 Jun 2020 at 03:53, Thara Gopinath <thara.gopinath@xxxxxxxxxx> wrote:
>
> RPMh power control hosts power domains that can be used as
> thermal warming devices. Register these power domains
> with the generic power domain warming device thermal framework.
>
> Signed-off-by: Thara Gopinath <thara.gopinath@xxxxxxxxxx>
Reviewed-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
Kind regards
Uffe
> ---
>
> v3->v4:
> - Introduce a boolean value is_warming_dev in rpmhpd structure to
> indicate if a generic power domain can be used as a warming
> device or not.With this change, device tree no longer has to
> specify which power domain inside the rpmh power domain provider
> is a warming device.
> - Move registering of warming devices into a late initcall to
> ensure that warming devices are registered after thermal
> framework is initialized.
>
> v5->v6:
> - Moved back registering of warming devices into probe since
> Bjorn pointed out that now the driver can be initialized as
> as a module, late_initcall will not work. Thermal framework
> takes care of binding a cooling device to a thermal zone even
> if the cooling device is registered before the thermal framework
> is initialized.
>
> drivers/soc/qcom/rpmhpd.c | 17 ++++++++++++++++-
> 1 file changed, 16 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/soc/qcom/rpmhpd.c b/drivers/soc/qcom/rpmhpd.c
> index a9c597143525..29e1eb4d11af 100644
> --- a/drivers/soc/qcom/rpmhpd.c
> +++ b/drivers/soc/qcom/rpmhpd.c
> @@ -12,6 +12,7 @@
> #include <linux/of_device.h>
> #include <linux/platform_device.h>
> #include <linux/pm_opp.h>
> +#include <linux/pd_warming.h>
> #include <soc/qcom/cmd-db.h>
> #include <soc/qcom/rpmh.h>
> #include <dt-bindings/power/qcom-rpmpd.h>
> @@ -49,6 +50,7 @@ struct rpmhpd {
> bool enabled;
> const char *res_name;
> u32 addr;
> + bool is_warming_dev;
> };
>
> struct rpmhpd_desc {
> @@ -90,6 +92,7 @@ static struct rpmhpd sdm845_mx = {
> .pd = { .name = "mx", },
> .peer = &sdm845_mx_ao,
> .res_name = "mx.lvl",
> + .is_warming_dev = true,
> };
>
> static struct rpmhpd sdm845_mx_ao = {
> @@ -472,7 +475,19 @@ static int rpmhpd_probe(struct platform_device *pdev)
> &rpmhpds[i]->pd);
> }
>
> - return of_genpd_add_provider_onecell(pdev->dev.of_node, data);
> + ret = of_genpd_add_provider_onecell(pdev->dev.of_node, data);
> +
> + if (ret)
> + return ret;
> +
> + if (!of_find_property(dev->of_node, "#cooling-cells", NULL))
> + return 0;
> +
> + for (i = 0; i < num_pds; i++)
> + if (rpmhpds[i]->is_warming_dev)
> + of_pd_warming_register(rpmhpds[i]->dev, i);
> +
> + return 0;
> }
>
> static struct platform_driver rpmhpd_driver = {
> --
> 2.20.1
>
