On 6/30/2024 5:53 PM, Stefan Wahren wrote:
This adds suspend/resume support for the 8250_bcm2835aux
driver to provide power management support on attached
devices.
Signed-off-by: Stefan Wahren <wahrenst@xxxxxxx>
---
Since i don't have a RS485 setup, any test feedback would be great.
drivers/tty/serial/8250/8250_bcm2835aux.c | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/drivers/tty/serial/8250/8250_bcm2835aux.c b/drivers/tty/serial/8250/8250_bcm2835aux.c
index 121a5ce86050..cccd2a09cb6f 100644
--- a/drivers/tty/serial/8250/8250_bcm2835aux.c
+++ b/drivers/tty/serial/8250/8250_bcm2835aux.c
@@ -213,11 +213,34 @@ static const struct acpi_device_id bcm2835aux_serial_acpi_match[] = {
};
MODULE_DEVICE_TABLE(acpi, bcm2835aux_serial_acpi_match);
+static int __maybe_unused bcm2835aux_suspend(struct device *dev)
+{
+ struct bcm2835aux_data *data = dev_get_drvdata(dev);
+
+ serial8250_suspend_port(data->line);
Don't you also need to disable the clock here, unless the device is a wake-up source, and conversely re-enable the clock upon resume?
-- Florian
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