diff mbox series

[v2,05/15] mux: mmio: add resume support

Message ID 20240102-j7200-pcie-s2r-v2-5-8e4f7d228ec2@bootlin.com
State Superseded
Headers show
Series Add suspend to ram support for PCIe on J7200 | expand

Commit Message

Thomas Richard Jan. 26, 2024, 2:36 p.m. UTC 
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(+)

Comments

Andy Shevchenko Jan. 26, 2024, 9:32 p.m. UTC | #1 
On Fri, Jan 26, 2024 at 4:37 PM Thomas Richard
<thomas.richard@bootlin.com> wrote:
>
> 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.

mux_chip_resume()
diff mbox series

Patch

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,
 };