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

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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>
This commit is contained in:
Théo Lebrun 2024-02-22 11:12:32 +01:00 committed by Mark Brown
parent 4efa1250b5
commit 078d62de43
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1 changed files with 18 additions and 2 deletions
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20
drivers/spi/spi-cadence-quadspi.c
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@ -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,