Enable device system suspend and resume PM support, and mark the device
state as suspended during system suspend to reject any data transfer.
Signed-off-by: Ji Sheng Teoh <jisheng.teoh@xxxxxxxxxxxxxxxx>
---
Changes since v1:
- Add missing err assignment in cdns_i2c_resume().
---
drivers/i2c/busses/i2c-cadence.c | 33 ++++++++++++++++++++++++++++++++
1 file changed, 33 insertions(+)
diff --git a/drivers/i2c/busses/i2c-cadence.c b/drivers/i2c/busses/i2c-cadence.c
index de3f58b60dce..4bb7d6756947 100644
--- a/drivers/i2c/busses/i2c-cadence.c
+++ b/drivers/i2c/busses/i2c-cadence.c
@@ -1176,6 +1176,18 @@ static int __maybe_unused cdns_i2c_runtime_suspend(struct device *dev)
return 0;
}
+static int __maybe_unused cdns_i2c_suspend(struct device *dev)
+{
+ struct cdns_i2c *xi2c = dev_get_drvdata(dev);
+
+ i2c_mark_adapter_suspended(&xi2c->adap);
+
+ if (!pm_runtime_status_suspended(dev))
+ return cdns_i2c_runtime_suspend(dev);
+
+ return 0;
+}
+
/**
* cdns_i2c_init - Controller initialisation
* @id: Device private data structure
@@ -1219,7 +1231,28 @@ static int __maybe_unused cdns_i2c_runtime_resume(struct device *dev)
return 0;
}
+static int __maybe_unused cdns_i2c_resume(struct device *dev)
+{
+ struct cdns_i2c *xi2c = dev_get_drvdata(dev);
+ int err;
+
+ err = cdns_i2c_runtime_resume(dev);
+ if (err)
+ return err;
+
+ if (pm_runtime_status_suspended(dev)) {
+ err = cdns_i2c_runtime_suspend(dev);
+ if (err)
+ return err;
+ }
+
+ i2c_mark_adapter_resumed(&xi2c->adap);
+
+ return 0;
+}
+
static const struct dev_pm_ops cdns_i2c_dev_pm_ops = {
+ SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(cdns_i2c_suspend, cdns_i2c_resume)
SET_RUNTIME_PM_OPS(cdns_i2c_runtime_suspend,
cdns_i2c_runtime_resume, NULL)
};
--
2.25.1
