[PATCH 6.7 055/713] spi: cadence-qspi: add system-wide suspend and resume callbacks

Sasha Levin
2024-03-24T22:48:16Z

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

[ Upstream commit 078d62de433b4f4556bb676e5dd670f0d4103376 ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/spi/spi-cadence-quadspi.c | 20 ++++++++++++++++++--
1 file changed, 18 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/spi-cadence-quadspi.c b/drivers/spi/spi-cadence-quadspi.c
index 4b2d42e54f568..1a8d03958dffb 100644
--- 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,
--
2.43.0