LKML Archive on lore.kernel.org
 help / color / Atom feed
From: Sibi Sankar <sibis@codeaurora.org>
To: robh+dt@kernel.org, andy.gross@linaro.org,
	myungjoo.ham@samsung.com, kyungmin.park@samsung.com,
	rjw@rjwysocki.net, viresh.kumar@linaro.org, nm@ti.com,
	sboyd@kernel.org, georgi.djakov@linaro.org
Cc: bjorn.andersson@linaro.org, david.brown@linaro.org,
	mark.rutland@arm.com, linux-kernel@vger.kernel.org,
	linux-arm-msm-owner@vger.kernel.org, devicetree@vger.kernel.org,
	rnayak@codeaurora.org, cw00.choi@samsung.com,
	linux-pm@vger.kernel.org, evgreen@chromium.org,
	daidavid1@codeaurora.org, dianders@chromium.org,
	Sibi Sankar <sibis@codeaurora.org>
Subject: [PATCH RFC 7/9] cpufreq: qcom: Add support to update cpu node's OPP tables
Date: Thu, 28 Mar 2019 20:58:20 +0530
Message-ID: <20190328152822.532-8-sibis@codeaurora.org> (raw)
In-Reply-To: <20190328152822.532-1-sibis@codeaurora.org>

Add support to parse and update OPP tables attached to the cpu nodes.

Signed-off-by: Sibi Sankar <sibis@codeaurora.org>
---
 drivers/cpufreq/qcom-cpufreq-hw.c | 29 +++++++++++++++++++++++++++--
 1 file changed, 27 insertions(+), 2 deletions(-)

diff --git a/drivers/cpufreq/qcom-cpufreq-hw.c b/drivers/cpufreq/qcom-cpufreq-hw.c
index 4b0b50403901..5c268dd2346c 100644
--- a/drivers/cpufreq/qcom-cpufreq-hw.c
+++ b/drivers/cpufreq/qcom-cpufreq-hw.c
@@ -73,6 +73,25 @@ static unsigned int qcom_cpufreq_hw_fast_switch(struct cpufreq_policy *policy,
 	return policy->freq_table[index].frequency;
 }
 
+static int qcom_find_update_opp(struct device *cpu_dev, unsigned long freq,
+				unsigned long volt)
+{
+	int ret;
+	struct dev_pm_opp *opp;
+
+	opp = dev_pm_opp_find_freq_exact(cpu_dev, freq, true);
+	if (IS_ERR(opp)) {
+		ret = dev_pm_opp_add(cpu_dev, freq, volt);
+	} else {
+		dev_pm_opp_disable(cpu_dev, freq);
+		ret = dev_pm_opp_update_voltage(cpu_dev, freq, volt);
+		dev_pm_opp_enable(cpu_dev, freq);
+		dev_pm_opp_put(opp);
+	}
+
+	return ret;
+}
+
 static int qcom_cpufreq_hw_read_lut(struct device *cpu_dev,
 				    struct cpufreq_policy *policy,
 				    void __iomem *base)
@@ -81,11 +100,16 @@ static int qcom_cpufreq_hw_read_lut(struct device *cpu_dev,
 	u32 volt;
 	unsigned int max_cores = cpumask_weight(policy->cpus);
 	struct cpufreq_frequency_table	*table;
+	int ret;
 
 	table = kcalloc(LUT_MAX_ENTRIES + 1, sizeof(*table), GFP_KERNEL);
 	if (!table)
 		return -ENOMEM;
 
+	ret = dev_pm_opp_of_add_table(cpu_dev);
+	if (ret)
+		dev_dbg(cpu_dev, "Couldn't add OPP table\n");
+
 	for (i = 0; i < LUT_MAX_ENTRIES; i++) {
 		data = readl_relaxed(base + REG_FREQ_LUT +
 				      i * LUT_ROW_SIZE);
@@ -104,7 +128,7 @@ static int qcom_cpufreq_hw_read_lut(struct device *cpu_dev,
 
 		if (freq != prev_freq && core_count == max_cores) {
 			table[i].frequency = freq;
-			dev_pm_opp_add(cpu_dev, freq * 1000, volt);
+			qcom_find_update_opp(cpu_dev, freq * 1000, volt);
 			dev_dbg(cpu_dev, "index=%d freq=%d, core_count %d\n", i,
 				freq, core_count);
 		} else {
@@ -125,7 +149,8 @@ static int qcom_cpufreq_hw_read_lut(struct device *cpu_dev,
 			if (prev_cc != max_cores) {
 				prev->frequency = prev_freq;
 				prev->flags = CPUFREQ_BOOST_FREQ;
-				dev_pm_opp_add(cpu_dev,	prev_freq * 1000, volt);
+				qcom_find_update_opp(cpu_dev, prev_freq * 1000,
+						     volt);
 			}
 
 			break;
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project


  parent reply index

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-03-28 15:28 [PATCH RFC 0/9] Add CPU based scaling support to Passive governor Sibi Sankar
2019-03-28 15:28 ` [PATCH RFC 1/9] OPP: Add and export helpers to get avg/peak bw Sibi Sankar
2019-03-28 15:28 ` [PATCH RFC 2/9] OPP: Export a number of helpers to prevent code duplication Sibi Sankar
2019-07-08  3:28   ` Hsin-Yi Wang
2019-07-10  8:01     ` Sibi Sankar
2019-03-28 15:28 ` [PATCH RFC 3/9] PM / devfreq: Add cpu based scaling support to passive_governor Sibi Sankar
2019-04-12  7:39   ` Chanwoo Choi
2019-05-27  8:23     ` Sibi Sankar
2019-05-28  1:27       ` Chanwoo Choi
2019-03-28 15:28 ` [PATCH RFC 4/9] dt-bindings: devfreq: Add bindings for devfreq dev-icbw driver Sibi Sankar
2019-03-28 15:28 ` [PATCH RFC 5/9] PM / devfreq: Add devfreq driver for interconnect bandwidth voting Sibi Sankar
2019-03-28 15:28 ` [PATCH RFC 6/9] OPP: Add and export helper to update voltage Sibi Sankar
2019-04-10 10:24   ` Viresh Kumar
2019-04-10 11:08     ` Sibi Sankar
2019-03-28 15:28 ` Sibi Sankar [this message]
2019-04-10 10:33   ` [PATCH RFC 7/9] cpufreq: qcom: Add support to update cpu node's OPP tables Viresh Kumar
2019-04-10 11:16     ` Sibi Sankar
2019-04-10 11:25       ` Viresh Kumar
2019-03-28 15:28 ` [PATCH RFC 8/9] arm64: dts: qcom: sdm845: Add cpu " Sibi Sankar
2019-03-28 15:28 ` [PATCH RFC 9/9] arm64: dts: qcom: sdm845: Add nodes for icbw driver and opp tables Sibi Sankar
2019-04-11  7:02 ` [PATCH RFC 0/9] Add CPU based scaling support to Passive governor Sibi Sankar

Reply instructions:

You may reply publically to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20190328152822.532-8-sibis@codeaurora.org \
    --to=sibis@codeaurora.org \
    --cc=andy.gross@linaro.org \
    --cc=bjorn.andersson@linaro.org \
    --cc=cw00.choi@samsung.com \
    --cc=daidavid1@codeaurora.org \
    --cc=david.brown@linaro.org \
    --cc=devicetree@vger.kernel.org \
    --cc=dianders@chromium.org \
    --cc=evgreen@chromium.org \
    --cc=georgi.djakov@linaro.org \
    --cc=kyungmin.park@samsung.com \
    --cc=linux-arm-msm-owner@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-pm@vger.kernel.org \
    --cc=mark.rutland@arm.com \
    --cc=myungjoo.ham@samsung.com \
    --cc=nm@ti.com \
    --cc=rjw@rjwysocki.net \
    --cc=rnayak@codeaurora.org \
    --cc=robh+dt@kernel.org \
    --cc=sboyd@kernel.org \
    --cc=viresh.kumar@linaro.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

LKML Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/lkml/0 lkml/git/0.git
	git clone --mirror https://lore.kernel.org/lkml/1 lkml/git/1.git
	git clone --mirror https://lore.kernel.org/lkml/2 lkml/git/2.git
	git clone --mirror https://lore.kernel.org/lkml/3 lkml/git/3.git
	git clone --mirror https://lore.kernel.org/lkml/4 lkml/git/4.git
	git clone --mirror https://lore.kernel.org/lkml/5 lkml/git/5.git
	git clone --mirror https://lore.kernel.org/lkml/6 lkml/git/6.git
	git clone --mirror https://lore.kernel.org/lkml/7 lkml/git/7.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 lkml lkml/ https://lore.kernel.org/lkml \
		linux-kernel@vger.kernel.org linux-kernel@archiver.kernel.org
	public-inbox-index lkml


Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-kernel


AGPL code for this site: git clone https://public-inbox.org/ public-inbox