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Subject[Patch v5 4/6] soc: qcom: Extend RPMh power controller driver to register warming devices.
Date
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.

Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Thara Gopinath <thara.gopinath@linaro.org>
---

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.

drivers/soc/qcom/rpmhpd.c | 37 ++++++++++++++++++++++++++++++++++++-
1 file changed, 36 insertions(+), 1 deletion(-)

diff --git a/drivers/soc/qcom/rpmhpd.c b/drivers/soc/qcom/rpmhpd.c
index 7142409a3b77..4e9c0bbb8826 100644
--- a/drivers/soc/qcom/rpmhpd.c
+++ b/drivers/soc/qcom/rpmhpd.c
@@ -11,6 +11,7 @@
#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>
@@ -48,6 +49,7 @@ struct rpmhpd {
bool enabled;
const char *res_name;
u32 addr;
+ bool is_warming_dev;
};

struct rpmhpd_desc {
@@ -55,6 +57,8 @@ struct rpmhpd_desc {
size_t num_pds;
};

+const struct rpmhpd_desc *global_desc;
+
static DEFINE_MUTEX(rpmhpd_lock);

/* SDM845 RPMH powerdomains */
@@ -89,6 +93,7 @@ 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 = {
@@ -452,7 +457,14 @@ 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;
+
+ global_desc = desc;
+
+ return 0;
}

static struct platform_driver rpmhpd_driver = {
@@ -469,3 +481,26 @@ static int __init rpmhpd_init(void)
return platform_driver_register(&rpmhpd_driver);
}
core_initcall(rpmhpd_init);
+
+static int __init rpmhpd_init_warming_device(void)
+{
+ size_t num_pds;
+ struct rpmhpd **rpmhpds;
+ int i;
+
+ if (!global_desc)
+ return -EINVAL;
+
+ rpmhpds = global_desc->rpmhpds;
+ num_pds = global_desc->num_pds;
+
+ if (!of_find_property(rpmhpds[0]->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;
+}
+late_initcall(rpmhpd_init_warming_device);
--
2.20.1
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