linux-kernel - [PATCH v6 5/5] cpufreq: qcom: Disable fast switch when scaling DDR/L3

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Date:   Sat,  6 Jun 2020 03:03:32 +0530
From:   Sibi Sankar <sibis@...eaurora.org>
To:     viresh.kumar@...aro.org, sboyd@...nel.org,
        georgi.djakov@...aro.org, saravanak@...gle.com, mka@...omium.org
Cc:     nm@...com, bjorn.andersson@...aro.org, agross@...nel.org,
        rjw@...ysocki.net, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
        dianders@...omium.org, vincent.guittot@...aro.org,
        amit.kucheria@...aro.org, lukasz.luba@....com,
        sudeep.holla@....com, smasetty@...eaurora.org,
        Sibi Sankar <sibis@...eaurora.org>
Subject: [PATCH v6 5/5] cpufreq: qcom: Disable fast switch when scaling DDR/L3

Disable fast switch when the opp-tables required for scaling DDR/L3
are populated.

Signed-off-by: Sibi Sankar <sibis@...eaurora.org>
---

v6:
 * No change

v5:
 * Drop dev_pm_opp_get_path_count [Saravana]

 drivers/cpufreq/qcom-cpufreq-hw.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/cpufreq/qcom-cpufreq-hw.c b/drivers/cpufreq/qcom-cpufreq-hw.c
index 8fa6ab6e0e4b6..56f01049fd3a3 100644
--- a/drivers/cpufreq/qcom-cpufreq-hw.c
+++ b/drivers/cpufreq/qcom-cpufreq-hw.c
@@ -158,6 +158,8 @@ static int qcom_cpufreq_hw_read_lut(struct device *cpu_dev,
 	} else if (ret != -ENODEV) {
 		dev_err(cpu_dev, "Invalid opp table in device tree\n");
 		return ret;
+	} else {
+		policy->fast_switch_possible = true;
 	}
 
 	for (i = 0; i < LUT_MAX_ENTRIES; i++) {
@@ -307,8 +309,6 @@ static int qcom_cpufreq_hw_cpu_init(struct cpufreq_policy *policy)
 
 	dev_pm_opp_of_register_em(policy->cpus);
 
-	policy->fast_switch_possible = true;
-
 	return 0;
 error:
 	devm_iounmap(dev, base);
-- 
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