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Subject[PATCH 4/7] soc: qcom: rpmpd: Add support for get/set performance state
Date
With genpd now expecting powerdomain drivers supporting performance
state to support get/set performance state callbacks, add support for it
in the rpmpd driver.

Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---
drivers/soc/qcom/rpmpd.c | 42 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 42 insertions(+)

diff --git a/drivers/soc/qcom/rpmpd.c b/drivers/soc/qcom/rpmpd.c
index c8754d867c33..4058c5b450c6 100644
--- a/drivers/soc/qcom/rpmpd.c
+++ b/drivers/soc/qcom/rpmpd.c
@@ -14,6 +14,7 @@
#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>
@@ -29,6 +30,8 @@
#define KEY_ENABLE 0x6e657773 /* swen */
#define KEY_FLOOR_CORNER 0x636676 /* vfc */

+#define MAX_RPMPD_STATE 6
+
#define DEFINE_RPMPD_CORN_SMPA(_platform, _name, _active, r_id) \
static struct rpmpd _platform##_##_active; \
static struct rpmpd _platform##_##_name = { \
@@ -222,6 +225,43 @@ 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);
+
+ mutex_lock(&rpmpd_lock);
+
+ if (state > MAX_RPMPD_STATE)
+ goto out;
+
+ 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);
+ of_property_read_u32(np, "qcom,level", &corner);
+ of_node_put(np);
+
+ return corner;
+}
+
static int rpmpd_probe(struct platform_device *pdev)
{
int i;
@@ -259,6 +299,8 @@ 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.get_performance_state = rpmpd_get_performance;
pm_genpd_init(&rpmpds[i]->pd, NULL, true);

data->domains[i] = &rpmpds[i]->pd;
--
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
of Code Aurora Forum, hosted by The Linux Foundation
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