From: Abel Vesa <abel.vesa@nxp.com>
To: Rob Herring <robh@kernel.org>, Shawn Guo <shawnguo@kernel.org>,
Sascha Hauer <kernel@pengutronix.de>,
Lucas Stach <l.stach@pengutronix.de>,
Fabio Estevam <festevam@gmail.com>,
Chanwoo Choi <cw00.choi@samsung.com>,
Georgi Djakov <djakov@kernel.org>,
Dong Aisheng <aisheng.dong@nxp.com>, Peng Fan <peng.fan@nxp.com>,
Martin Kepplinger <martink@posteo.de>,
devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-clk@vger.kernel.org,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Cc: NXP Linux Team <linux-imx@nxp.com>, Abel Vesa <abel.vesa@nxp.com>
Subject: [RFC 07/19] devfreq: imx8m-ddrc: Add late system sleep PM ops
Date: Fri, 19 Feb 2021 18:00:04 +0200 [thread overview]
Message-ID: <1613750416-11901-8-git-send-email-abel.vesa@nxp.com> (raw)
In-Reply-To: <1613750416-11901-1-git-send-email-abel.vesa@nxp.com>
Seems that, in order to be able to resume from suspend, the dram rate
needs to be the highest one available. Therefore, add the late system
suspend/resume PM ops which set the highest rate on suspend and the
latest one used before suspending on resume.
Signed-off-by: Abel Vesa <abel.vesa@nxp.com>
---
drivers/devfreq/imx8m-ddrc.c | 26 ++++++++++++++++++++++++++
1 file changed, 26 insertions(+)
diff --git a/drivers/devfreq/imx8m-ddrc.c b/drivers/devfreq/imx8m-ddrc.c
index 33de83acfd8b..04347dee781b 100644
--- a/drivers/devfreq/imx8m-ddrc.c
+++ b/drivers/devfreq/imx8m-ddrc.c
@@ -72,6 +72,8 @@ struct imx8m_ddrc {
struct clk *dram_alt;
struct clk *dram_apb;
+ unsigned long suspend_rate;
+ unsigned long resume_rate;
int freq_count;
struct imx8m_ddrc_freq freq_table[IMX8M_DDRC_MAX_FREQ_COUNT];
};
@@ -271,6 +273,22 @@ static int imx8m_ddrc_target(struct device *dev, unsigned long *freq, u32 flags)
return ret;
}
+static int imx8m_ddrc_suspend(struct device *dev)
+{
+ struct imx8m_ddrc *priv = dev_get_drvdata(dev);
+
+ priv->resume_rate = clk_get_rate(priv->dram_core);
+
+ return imx8m_ddrc_target(dev, &priv->suspend_rate, 0);
+}
+
+static int imx8m_ddrc_resume(struct device *dev)
+{
+ struct imx8m_ddrc *priv = dev_get_drvdata(dev);
+
+ return imx8m_ddrc_target(dev, &priv->resume_rate, 0);
+}
+
static int imx8m_ddrc_get_cur_freq(struct device *dev, unsigned long *freq)
{
struct imx8m_ddrc *priv = dev_get_drvdata(dev);
@@ -336,6 +354,9 @@ static int imx8m_ddrc_init_freq_info(struct device *dev)
if (dev_pm_opp_add(dev, freq->rate * 250000, 0))
return -ENODEV;
+
+ if (index == 0)
+ priv->suspend_rate = freq->rate * 250000;
}
return 0;
@@ -412,10 +433,15 @@ static const struct of_device_id imx8m_ddrc_of_match[] = {
};
MODULE_DEVICE_TABLE(of, imx8m_ddrc_of_match);
+static const struct dev_pm_ops imx8m_ddrc_pm_ops = {
+ SET_LATE_SYSTEM_SLEEP_PM_OPS(imx8m_ddrc_suspend, imx8m_ddrc_resume)
+};
+
static struct platform_driver imx8m_ddrc_platdrv = {
.probe = imx8m_ddrc_probe,
.driver = {
.name = "imx8m-ddrc-devfreq",
+ .pm = &imx8m_ddrc_pm_ops,
.of_match_table = of_match_ptr(imx8m_ddrc_of_match),
},
};
--
2.29.2
next prev parent reply other threads:[~2021-02-19 16:03 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-19 15:59 [RFC 00/19] Rework support for i.MX8MQ interconnect with devfreq Abel Vesa
2021-02-19 15:59 ` [RFC 01/19] clk: imx8mq: Replace critical with ignore_unused flag for dram_apb clock Abel Vesa
2021-02-19 15:59 ` [RFC 02/19] dt-bindings: interconnect: imx8mq: Add missing pl301 and SAI ids Abel Vesa
2021-03-05 23:10 ` Rob Herring
2021-02-19 16:00 ` [RFC 03/19] devfreq: imx-bus: Switch governor to powersave Abel Vesa
2021-02-26 14:46 ` Chanwoo Choi
2021-02-19 16:00 ` [RFC 04/19] devfreq: imx-bus: Decouple imx-bus from icc made Abel Vesa
2021-02-26 16:52 ` Chanwoo Choi
2021-02-19 16:00 ` [RFC 05/19] devfreq: imx8m-ddrc: Change governor to powersave Abel Vesa
2021-02-26 14:47 ` Chanwoo Choi
2021-03-09 13:40 ` Dong Aisheng
2021-02-19 16:00 ` [RFC 06/19] devfreq: imx8m-ddrc: Use the opps acquired from EL3 Abel Vesa
2021-02-26 15:12 ` Chanwoo Choi
2021-02-19 16:00 ` Abel Vesa [this message]
2021-02-26 15:23 ` [RFC 07/19] devfreq: imx8m-ddrc: Add late system sleep PM ops Chanwoo Choi
2021-02-19 16:00 ` [RFC 08/19] interconnect: imx: Switch from imx_icc_node_adj_desc to fsl,icc-id node assignment Abel Vesa
2021-02-19 16:00 ` [RFC 09/19] interconnect: imx8: Remove the imx_icc_node_adj_desc Abel Vesa
2021-02-19 16:00 ` [RFC 10/19] interconnect: imx8mq: Add the pl301_per_m and pl301_wakeup nodes and subnodes Abel Vesa
2021-02-19 16:00 ` [RFC 11/19] interconnect: imx8mq: Add of_match_table Abel Vesa
2021-02-19 16:00 ` [RFC 12/19] interconnect: imx: Add imx_icc_get_bw and imx_icc_aggregate functions Abel Vesa
2021-02-19 16:00 ` [RFC 13/19] arm64: dts: imx8mq: Add fsl,icc-id property to ddrc node Abel Vesa
2021-02-19 16:00 ` [RFC 14/19] arm64: dts: imx8mq: Add fsl,icc-id to noc node Abel Vesa
2021-02-19 16:29 ` Abel Vesa
2021-02-19 16:00 ` [RFC 15/19] arm64: dts: imx8mq: Add all pl301 nodes Abel Vesa
2021-02-21 15:47 ` Krzysztof Kozlowski
2021-02-19 16:00 ` [RFC 16/19] arm64: dts: imx8mq: Add the interconnect node Abel Vesa
2021-02-19 16:00 ` [RFC 17/19] arm64: dts: imx8mq: Add interconnect properties to icc consumer nodes Abel Vesa
2021-02-19 16:00 ` [RFC 18/19] net: ethernet: fec_main: Add interconnect support Abel Vesa
2021-02-19 16:00 ` [RFC 19/19] mmc: sdhci-esdhc-imx: " Abel Vesa
2021-02-22 16:03 ` [RFC 00/19] Rework support for i.MX8MQ interconnect with devfreq Martin Kepplinger
2021-02-23 17:20 ` Abel Vesa
2021-02-25 12:13 ` Martin Kepplinger
2021-03-09 11:43 ` Abel Vesa
2021-03-24 8:03 ` Martin Kepplinger
2021-02-26 23:04 ` Chanwoo Choi
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