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From: Rajendra Nayak <rnayak@codeaurora.org>
To: linux-kernel@vger.kernel.org
Cc: ulf.hansson@linaro.org, Rajendra Nayak <rnayak@codeaurora.org>,
	linux-scsi@vger.kernel.org, linux-pm@vger.kernel.org,
	linux-arm-msm@vger.kernel.org, rafael@kernel.org,
	dianders@chromium.org, dri-devel@lists.freedesktop.org,
	linux-spi@vger.kernel.org, linux-serial@vger.kernel.org,
	viresh.kumar@linaro.org, swboyd@chromium.org
Subject: [RFC v2 07/11] scsi: ufs: Add support for specifying OPP tables in DT
Date: Wed, 20 Mar 2019 15:19:14 +0530
Message-ID: <20190320094918.20234-8-rnayak@codeaurora.org> (raw)
In-Reply-To: <20190320094918.20234-1-rnayak@codeaurora.org>

Some platforms like qualcomms sdm845 SoC have a need to set
a performance state of a power domain for UFS along with
setting the clock rate. Add support for passing this freq/perf state
tuple from DT as an OPP table. Modify the driver to read the OPP
table and register with OPP layer.

Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org>
---
 drivers/scsi/ufs/ufshcd.c | 21 +++++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index ffa9e58680b4..2b260e83874a 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -913,6 +913,16 @@ static int ufshcd_scale_clks(struct ufs_hba *hba, bool scale_up)
 	if (ret)
 		return ret;
 
+	if (hba->virt_devs) {
+		struct dev_pm_opp *opp;
+		unsigned long freq = scale_up ? INT_MAX: 0;
+		if (scale_up)
+			opp = dev_pm_opp_find_freq_floor(hba->dev, &freq);
+		else
+			opp = dev_pm_opp_find_freq_ceil(hba->dev, &freq);
+		dev_pm_opp_set_rate(hba->dev, dev_pm_opp_get_freq(opp));
+	}
+
 	list_for_each_entry(clki, head, list) {
 		if (!IS_ERR_OR_NULL(clki->clk)) {
 			if (scale_up && clki->max_freq) {
@@ -1318,6 +1328,7 @@ static int ufshcd_devfreq_init(struct ufs_hba *hba)
 	struct list_head *clk_list = &hba->clk_list_head;
 	struct ufs_clk_info *clki;
 	struct devfreq *devfreq;
+	struct device *virt_dev;
 	int ret;
 
 	/* Skip devfreq if we don't have any clocks in the list */
@@ -1325,8 +1336,14 @@ static int ufshcd_devfreq_init(struct ufs_hba *hba)
 		return 0;
 
 	clki = list_first_entry(clk_list, struct ufs_clk_info, list);
-	dev_pm_opp_add(hba->dev, clki->min_freq, 0);
-	dev_pm_opp_add(hba->dev, clki->max_freq, 0);
+
+	if (dev_pm_opp_of_add_table(hba->dev)) {
+		dev_pm_opp_add(hba->dev, clki->min_freq, 0);
+		dev_pm_opp_add(hba->dev, clki->max_freq, 0);
+	} else {
+		virt_dev = hba->virt_devs[hba->num_virt_devs -1];
+		dev_pm_opp_set_genpd_virt_dev(hba->dev, virt_dev, 0);
+	}
 
 	devfreq = devfreq_add_device(hba->dev,
 			&ufs_devfreq_profile,
-- 
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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  parent reply index

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-03-20  9:49 [RFC v2 00/11] DVFS in the OPP core Rajendra Nayak
2019-03-20  9:49 ` [RFC v2 01/11] OPP: Don't overwrite rounded clk rate Rajendra Nayak
2019-06-11 10:54   ` Viresh Kumar
2019-06-12  7:42     ` Rajendra Nayak
2019-06-12  8:25       ` Viresh Kumar
2019-06-13  9:54         ` Viresh Kumar
2019-06-14  5:27           ` Viresh Kumar
2019-06-17  3:50             ` Viresh Kumar
2019-06-17  4:07               ` Rajendra Nayak
2019-06-17  4:17                 ` Viresh Kumar
2019-06-17  4:25                   ` Rajendra Nayak
2019-06-14  5:54           ` Rajendra Nayak
2019-03-20  9:49 ` [RFC v2 02/11] OPP: Make dev_pm_opp_set_rate() with freq=0 as valid Rajendra Nayak
2019-06-14  6:32   ` Viresh Kumar
2019-06-17  4:04     ` Rajendra Nayak
2019-03-20  9:49 ` [RFC v2 03/11] tty: serial: qcom_geni_serial: Use OPP API to set clk/perf state Rajendra Nayak
2019-03-20  9:49 ` [RFC v2 04/11] spi: spi-geni-qcom: " Rajendra Nayak
2019-03-20  9:49 ` [RFC v2 05/11] arm64: dts: sdm845: Add OPP table for all qup devices Rajendra Nayak
2019-03-20  9:49 ` [RFC v2 06/11] scsi: ufs: Add support to manage multiple power domains in ufshcd-pltfrm Rajendra Nayak
2019-03-20  9:49 ` Rajendra Nayak [this message]
2019-03-20  9:49 ` [RFC v2 08/11] arm64: dts: sdm845: Add ufs opps and power-domains Rajendra Nayak
2019-05-14  7:53   ` Ulf Hansson
2019-03-20  9:49 ` [RFC v2 09/11] drm/msm/dpu: Use OPP API to set clk/perf state Rajendra Nayak
2019-04-10  3:49   ` Viresh Kumar
2019-04-10  3:49     ` Viresh Kumar
2019-03-20  9:49 ` [RFC v2 10/11] drm/msm: dsi: " Rajendra Nayak
2019-03-20  9:49 ` [RFC v2 11/11] arm64: dts: sdm845: Add DSI and MDP OPP tables and power-domains Rajendra Nayak
2019-04-10  3:51 ` [RFC v2 00/11] DVFS in the OPP core Viresh Kumar
2019-04-10  3:51   ` Viresh Kumar
2019-05-21  6:22 ` Viresh Kumar
2019-05-24  6:03   ` Rajendra Nayak
2019-06-17  4:26 ` Viresh Kumar

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