linux-kernel - [PATCH v5 2/5] thermal/drivers/mediatek/lvts

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Message-ID: <20231017185555.142062-3-bero@lindev.ch>
Date:   Tue, 17 Oct 2023 20:55:52 +0200
From:   Bernhard Rosenkränzer <bero@...dev.ch>
To:     daniel.lezcano@...aro.org, angelogioacchino.delregno@...labora.com,
        rafael@...nel.org, amitk@...nel.org, rui.zhang@...el.com,
        matthias.bgg@...il.com, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, dunlap@...radead.org,
        e.xingchen@....com.cn, p.zabel@...gutronix.de
Cc:     linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, devicetree@...r.kernel.org,
        wenst@...omium.org, ames.lo@...iatek.com, rex-bc.chen@...iatek.com,
        nfraprado@...labora.com, abailon@...libre.com,
        amergnat@...libre.com, khilman@...libre.com
Subject: [PATCH v5 2/5] thermal/drivers/mediatek/lvts_thermal: Add suspend and resume

From: Balsam CHIHI <bchihi@...libre.com>

Add suspend and resume support to LVTS driver.

Signed-off-by: Balsam CHIHI <bchihi@...libre.com>
[bero@...libre.com: suspend/resume in noirq phase]
Co-developed-by: Bernhard Rosenkränzer <bero@...libre.com>
Signed-off-by: Bernhard Rosenkränzer <bero@...libre.com>
Reviewed-by: Matthias Brugger <matthias.bgg@...il.com>
Reviewed-by: Alexandre Mergnat <amergnat@...libre.com>
---
 drivers/thermal/mediatek/lvts_thermal.c | 37 +++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/drivers/thermal/mediatek/lvts_thermal.c b/drivers/thermal/mediatek/lvts_thermal.c
index 877a0e5ac3fd3..c5a03bdf63e9d 100644
--- a/drivers/thermal/mediatek/lvts_thermal.c
+++ b/drivers/thermal/mediatek/lvts_thermal.c
@@ -1254,6 +1254,38 @@ static void lvts_remove(struct platform_device *pdev)
 	lvts_debugfs_exit(lvts_td);
 }
 
+static int lvts_suspend(struct device *dev)
+{
+	struct lvts_domain *lvts_td;
+	int i;
+
+	lvts_td = dev_get_drvdata(dev);
+
+	for (i = 0; i < lvts_td->num_lvts_ctrl; i++)
+		lvts_ctrl_set_enable(&lvts_td->lvts_ctrl[i], false);
+
+	clk_disable_unprepare(lvts_td->clk);
+
+	return 0;
+}
+
+static int lvts_resume(struct device *dev)
+{
+	struct lvts_domain *lvts_td;
+	int i, ret;
+
+	lvts_td = dev_get_drvdata(dev);
+
+	ret = clk_prepare_enable(lvts_td->clk);
+	if (ret)
+		return ret;
+
+	for (i = 0; i < lvts_td->num_lvts_ctrl; i++)
+		lvts_ctrl_set_enable(&lvts_td->lvts_ctrl[i], true);
+
+	return 0;
+}
+
 static const struct lvts_ctrl_data mt8195_lvts_mcu_data_ctrl[] = {
 	{
 		.cal_offset = { 0x04, 0x07 },
@@ -1350,12 +1382,17 @@ static const struct of_device_id lvts_of_match[] = {
 };
 MODULE_DEVICE_TABLE(of, lvts_of_match);
 
+static const struct dev_pm_ops lvts_pm_ops = {
+	NOIRQ_SYSTEM_SLEEP_PM_OPS(lvts_suspend, lvts_resume)
+};
+
 static struct platform_driver lvts_driver = {
 	.probe = lvts_probe,
 	.remove_new = lvts_remove,
 	.driver = {
 		.name = "mtk-lvts-thermal",
 		.of_match_table = lvts_of_match,
+		.pm = &lvts_pm_ops,
 	},
 };
 module_platform_driver(lvts_driver);
-- 
2.42.0