linux-kernel - [PATCH v3 2/5] thermal/drivers/mediatek/lvts

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Date:   Mon, 29 May 2023 18:46:02 +0200
From:   Bernhard Rosenkränzer <bero@...libre.com>
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, rdunlap@...radead.org,
        ye.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, james.lo@...iatek.com,
        rex-bc.chen@...iatek.com, nfraprado@...labora.com,
        abailon@...libre.com, amergnat@...libre.com, khilman@...libre.com
Subject: [PATCH v3 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>
Signed-off-by: Bernhard Rosenkränzer <bero@...libre.com>
---
 drivers/thermal/mediatek/lvts_thermal.c | 34 +++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/drivers/thermal/mediatek/lvts_thermal.c b/drivers/thermal/mediatek/lvts_thermal.c
index d0a3f95b7884b..5ea8a9d569ea6 100644
--- a/drivers/thermal/mediatek/lvts_thermal.c
+++ b/drivers/thermal/mediatek/lvts_thermal.c
@@ -1169,6 +1169,38 @@ static int lvts_remove(struct platform_device *pdev)
 	return 0;
 }
 
+static int lvts_suspend(struct platform_device *pdev, pm_message_t state)
+{
+	struct lvts_domain *lvts_td;
+	int i;
+
+	lvts_td = platform_get_drvdata(pdev);
+
+	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 platform_device *pdev)
+{
+	struct lvts_domain *lvts_td;
+	int i, ret;
+
+	lvts_td = platform_get_drvdata(pdev);
+
+	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 },
@@ -1268,6 +1300,8 @@ MODULE_DEVICE_TABLE(of, lvts_of_match);
 static struct platform_driver lvts_driver = {
 	.probe = lvts_probe,
 	.remove = lvts_remove,
+	.suspend = lvts_suspend,
+	.resume = lvts_resume,
 	.driver = {
 		.name = "mtk-lvts-thermal",
 		.of_match_table = lvts_of_match,
-- 
2.41.0.rc2