[PATCH v3 06/18] mux: mmio: add resume support

Thomas Richard
2024-02-15T15:18:07Z

From: Théo Lebrun <theo.lebrun@bootlin.com>

No need to save something during the suspend stage, as the mux core has an
internal cache to store the state of muxes.

This cache is used by mux_chip_resume() to restore all muxes.

Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com>
Signed-off-by: Thomas Richard <thomas.richard@bootlin.com>
---
drivers/mux/mmio.c | 12 ++++++++++++
1 file changed, 12 insertions(+)

diff --git a/drivers/mux/mmio.c b/drivers/mux/mmio.c
index fd1d121a584b..892ff4714b68 100644
--- a/drivers/mux/mmio.c
+++ b/drivers/mux/mmio.c
@@ -125,13 +125,25 @@ static int mux_mmio_probe(struct platform_device *pdev)

mux_chip->ops = &mux_mmio_ops;

+ dev_set_drvdata(dev, mux_chip);
+
return devm_mux_chip_register(dev, mux_chip);
}

+static int mux_mmio_resume_noirq(struct device *dev)
+{
+ struct mux_chip *mux_chip = dev_get_drvdata(dev);
+
+ return mux_chip_resume(mux_chip);
+}
+
+static DEFINE_NOIRQ_DEV_PM_OPS(mux_mmio_pm_ops, NULL, mux_mmio_resume_noirq);
+
static struct platform_driver mux_mmio_driver = {
.driver = {
.name = "mmio-mux",
.of_match_table = mux_mmio_dt_ids,
+ .pm = pm_sleep_ptr(&mux_mmio_pm_ops),
},
.probe = mux_mmio_probe,
};

--
2.39.2