[PATCH v7 04/10] soc: qcom: rpmpd: Add support for get/set performance state

Rajendra Nayak
2018-12-12T09:25:53Z

Add support for the .set_performace_state() and .opp_to_performance_state()
callbacks in the rpmpd driver.

Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
---
drivers/soc/qcom/rpmpd.c | 44 ++++++++++++++++++++++++++++++++++++++++
1 file changed, 44 insertions(+)

diff --git a/drivers/soc/qcom/rpmpd.c b/drivers/soc/qcom/rpmpd.c
index 7715ba7c9157..59e21c88a144 100644
--- a/drivers/soc/qcom/rpmpd.c
+++ b/drivers/soc/qcom/rpmpd.c
@@ -10,6 +10,7 @@
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
+#include <linux/pm_opp.h>
#include <linux/soc/qcom/smd-rpm.h>

#include <dt-bindings/mfd/qcom-rpm.h>
@@ -26,6 +27,8 @@
#define KEY_ENABLE 0x6e657773 /* swen */
#define KEY_FLOOR_CORNER 0x636676 /* vfc */

+#define MAX_RPMPD_STATE 6
+
#define DEFINE_RPMPD_CORNER_SMPA(_platform, _name, _active, r_id) \
static struct rpmpd _platform##_##_active; \
static struct rpmpd _platform##_##_name = { \
@@ -218,6 +221,45 @@ static int rpmpd_power_off(struct generic_pm_domain *domain)
return ret;
}

+static int rpmpd_set_performance(struct generic_pm_domain *domain,
+ unsigned int state)
+{
+ int ret = 0;
+ struct rpmpd *pd = domain_to_rpmpd(domain);
+
+ if (state > MAX_RPMPD_STATE)
+ goto out;
+
+ mutex_lock(&rpmpd_lock);
+
+ pd->corner = state;
+
+ if (!pd->enabled && pd->key != KEY_FLOOR_CORNER)
+ goto out;
+
+ ret = rpmpd_aggregate_corner(pd);
+
+out:
+ mutex_unlock(&rpmpd_lock);
+
+ return ret;
+}
+
+static unsigned int rpmpd_get_performance(struct generic_pm_domain *genpd,
+ struct dev_pm_opp *opp)
+{
+ struct device_node *np;
+ unsigned int corner = 0;
+
+ np = dev_pm_opp_get_of_node(opp);
+ if (of_property_read_u32(np, "qcom,level", &corner))
+ pr_err("%s: missing 'qcom,level' property\n", __func__);
+
+ of_node_put(np);
+
+ return corner;
+}
+
static int rpmpd_probe(struct platform_device *pdev)
{
int i;
@@ -258,6 +300,8 @@ static int rpmpd_probe(struct platform_device *pdev)
rpmpds[i]->rpm = rpm;
rpmpds[i]->pd.power_off = rpmpd_power_off;
rpmpds[i]->pd.power_on = rpmpd_power_on;
+ rpmpds[i]->pd.set_performance_state = rpmpd_set_performance;
+ rpmpds[i]->pd.opp_to_performance_state = rpmpd_get_performance;
pm_genpd_init(&rpmpds[i]->pd, NULL, true);

data->domains[i] = &rpmpds[i]->pd;