[PATCH v5 2/5] thermal/drivers/mediatek/lvts_thermal: Add suspend and resume

Bernhard Rosenkränzer
2023-10-17T19:02:21Z

Add suspend and resume support to LVTS driver.

Signed-off-by: Balsam CHIHI <bchihi@baylibre.com>
[bero@baylibre.com: suspend/resume in noirq phase]
Co-developed-by: Bernhard Rosenkränzer <bero@baylibre.com>
Signed-off-by: Bernhard Rosenkränzer <bero@baylibre.com>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Reviewed-by: Alexandre Mergnat <amergnat@baylibre.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