openwrtv4/target/linux/ipq806x/patches-4.9/0046-cpufreq-qcom-independent-core-clocks.patch

From patchwork Fri Dec  8 09:42:30 2017
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Subject: [v4,12/12] cpufreq: dt: Reintroduce independent_clocks platform data
From: Sricharan R <sricharan@codeaurora.org>
X-Patchwork-Id: 10102073
Message-Id: <1512726150-7204-13-git-send-email-sricharan@codeaurora.org>
To: mturquette@baylibre.com, sboyd@codeaurora.org,
 devicetree@vger.kernel.org, linux-pm@vger.kernel.org,
 linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org,
 viresh.kumar@linaro.org, linux-arm-kernel@lists.infradead.org
Cc: sricharan@codeaurora.org
Date: Fri,  8 Dec 2017 15:12:30 +0530

The Platform data was removed earlier by,
'commit eb96924acddc ("cpufreq: dt: Kill platform-data")'
since there were no users at that time.
Now this is required when the each of the cpu clocks
can be scaled independently, which is the case
for krait cores. So reintroduce it.

Signed-off-by: Sricharan R <sricharan@codeaurora.org>
---
 drivers/cpufreq/cpufreq-dt.c | 7 ++++++-
 drivers/cpufreq/cpufreq-dt.h | 6 ++++++
 2 files changed, 12 insertions(+), 1 deletion(-)

--- a/drivers/cpufreq/cpufreq-dt.c
+++ b/drivers/cpufreq/cpufreq-dt.c
@@ -221,7 +221,10 @@ static int cpufreq_init(struct cpufreq_p
 	}
 
 	if (fallback) {
-		cpumask_setall(policy->cpus);
+		struct cpufreq_dt_platform_data *pd = cpufreq_get_driver_data();
+
+		if (!pd || !pd->independent_clocks)
+			cpumask_setall(policy->cpus);
 
 		/*
 		 * OPP tables are initialized only for policy->cpu, do it for
@@ -376,6 +379,8 @@ static int dt_cpufreq_probe(struct platf
 	if (data && data->have_governor_per_policy)
 		dt_cpufreq_driver.flags |= CPUFREQ_HAVE_GOVERNOR_PER_POLICY;
 
+	dt_cpufreq_driver.driver_data = data;
+
 	ret = cpufreq_register_driver(&dt_cpufreq_driver);
 	if (ret)
 		dev_err(&pdev->dev, "failed register driver: %d\n", ret);
--- a/drivers/cpufreq/cpufreq-dt.h
+++ b/drivers/cpufreq/cpufreq-dt.h
@@ -13,6 +13,12 @@
 #include <linux/types.h>
 
 struct cpufreq_dt_platform_data {
+	/*
+	 * True when each CPU has its own clock to control its
+	 * frequency, false when all CPUs are controlled by a single
+	 * clock.
+	 */
+	bool independent_clocks;
 	bool have_governor_per_policy;
 };