spi: cadence-qspi: add system-wide suspend and resume callbacks

Each SPI controller is expected to call the spi_controller_suspend() and
spi_controller_resume() callbacks at system-wide suspend and resume.

It (1) handles the kthread worker for queued controllers and (2) marks
the controller as suspended to have spi_sync() fail while the
controller is unavailable.

Those two operations do not require the controller to be active, we do
not need to increment the runtime PM usage counter.

Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com>
Link: https://msgid.link/r/20240222-cdns-qspi-pm-fix-v4-4-6b6af8bcbf59@bootlin.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/spi/spi-cadence-quadspi.c b/drivers/spi/spi-cadence-quadspi.c
index 4b2d42e54f5684ad923d77a9f8212a1736ab6b2a..1a8d03958dffbfb77a4cd183d8a18fbd3ed53d63 100644 (file)
--- a/drivers/spi/spi-cadence-quadspi.c
+++ b/drivers/spi/spi-cadence-quadspi.c
@@ -1949,8 +1949,24 @@ static int cqspi_runtime_resume(struct device *dev)
        return 0;
 }
 
-static DEFINE_RUNTIME_DEV_PM_OPS(cqspi_dev_pm_ops, cqspi_runtime_suspend,
-                                cqspi_runtime_resume, NULL);
+static int cqspi_suspend(struct device *dev)
+{
+       struct cqspi_st *cqspi = dev_get_drvdata(dev);
+
+       return spi_controller_suspend(cqspi->host);
+}
+
+static int cqspi_resume(struct device *dev)
+{
+       struct cqspi_st *cqspi = dev_get_drvdata(dev);
+
+       return spi_controller_resume(cqspi->host);
+}
+
+static const struct dev_pm_ops cqspi_dev_pm_ops = {
+       RUNTIME_PM_OPS(cqspi_runtime_suspend, cqspi_runtime_resume, NULL)
+       SYSTEM_SLEEP_PM_OPS(cqspi_suspend, cqspi_resume)
+};
 
 static const struct cqspi_driver_platdata cdns_qspi = {
        .quirks = CQSPI_DISABLE_DAC_MODE,