linux-kernel - [PATCH v1 3/3] scsi: ufs-qcom: Override devfreq parameters

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Date:   Tue, 24 Mar 2020 17:07:05 -0700
From:   Asutosh Das <asutoshd@...eaurora.org>
To:     cang@...eaurora.org, martin.petersen@...cle.com,
        linux-scsi@...r.kernel.org
Cc:     Asutosh Das <asutoshd@...eaurora.org>,
        linux-arm-msm@...r.kernel.org, Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        Avri Altman <avri.altman@....com>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v1 3/3] scsi: ufs-qcom: Override devfreq parameters

Override devfreq parameters for power-performance
trade-off.

Signed-off-by: Asutosh Das <asutoshd@...eaurora.org>
---
 drivers/scsi/ufs/ufs-qcom.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/drivers/scsi/ufs/ufs-qcom.c b/drivers/scsi/ufs/ufs-qcom.c
index 6115ac6..0fb17e2 100644
--- a/drivers/scsi/ufs/ufs-qcom.c
+++ b/drivers/scsi/ufs/ufs-qcom.c
@@ -10,6 +10,7 @@
 #include <linux/phy/phy.h>
 #include <linux/gpio/consumer.h>
 #include <linux/reset-controller.h>
+#include <linux/devfreq.h>
 
 #include "ufshcd.h"
 #include "ufshcd-pltfrm.h"
@@ -1689,6 +1690,21 @@ static void ufs_qcom_device_reset(struct ufs_hba *hba)
 	usleep_range(10, 15);
 }
 
+static void ufs_qcom_config_scaling_param(struct ufs_hba *hba,
+					  struct devfreq_dev_profile *p,
+					  void *data)
+{
+	static struct devfreq_simple_ondemand_data *d;
+
+	if (!data)
+		return;
+
+	d = (struct devfreq_simple_ondemand_data *)data;
+	p->polling_ms = 60;
+	d->upthreshold = 70;
+	d->downdifferential = 65;
+}
+
 /**
  * struct ufs_hba_qcom_vops - UFS QCOM specific variant operations
  *
@@ -1710,6 +1726,7 @@ static const struct ufs_hba_variant_ops ufs_hba_qcom_vops = {
 	.resume			= ufs_qcom_resume,
 	.dbg_register_dump	= ufs_qcom_dump_dbg_regs,
 	.device_reset		= ufs_qcom_device_reset,
+	.config_scaling_param = ufs_qcom_config_scaling_param,
 };
 
 /**
-- 
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