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spi: cadence-xspi: support suspend/resume

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Add system wide suspend and resume support, the suspend hook
implementation is straightforward, just call spi_controller_suspend()
While the resume hook implementation is a bit complex, we need to redo
something which is done during probe, such as enable the interrupts,
setup clk and config the phy for mrvl hw overlay.

Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
Link: https://patch.msgid.link/20260122155119.12865-1-jszhang@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Jisheng Zhang 2026-01-22 23:51:19 +08:00 • committed by Mark Brown
parent e73eb6a73c
commit db6a59cfcc
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GPG key ID: 24D68B725D5487D0
1 changed files with 28 additions and 1 deletions
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29
drivers/spi/spi-cadence-xspi.c
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@ -350,6 +350,7 @@ static const int cdns_mrvl_xspi_clk_div_list[] = {
struct cdns_xspi_dev {
struct platform_device *pdev;
struct spi_controller *host;
struct device *dev;
void __iomem *iobase;
@ -1159,9 +1160,10 @@ static int cdns_xspi_probe(struct platform_device *pdev)
}
host->bus_num = -1;
platform_set_drvdata(pdev, host);
platform_set_drvdata(pdev, cdns_xspi);
cdns_xspi->pdev = pdev;
cdns_xspi->host = host;
cdns_xspi->dev = &pdev->dev;
cdns_xspi->cur_cs = 0;
@ -1250,6 +1252,30 @@ static int cdns_xspi_probe(struct platform_device *pdev)
return 0;
}
static int cdns_xspi_suspend(struct device *dev)
{
struct cdns_xspi_dev *cdns_xspi = dev_get_drvdata(dev);
return spi_controller_suspend(cdns_xspi->host);
}
static int cdns_xspi_resume(struct device *dev)
{
struct cdns_xspi_dev *cdns_xspi = dev_get_drvdata(dev);
if (cdns_xspi->driver_data->mrvl_hw_overlay) {
cdns_mrvl_xspi_setup_clock(cdns_xspi, MRVL_DEFAULT_CLK);
cdns_xspi_configure_phy(cdns_xspi);
}
cdns_xspi->set_interrupts_handler(cdns_xspi, false);
return spi_controller_resume(cdns_xspi->host);
}
static DEFINE_SIMPLE_DEV_PM_OPS(cdns_xspi_pm_ops,
cdns_xspi_suspend, cdns_xspi_resume);
static const struct of_device_id cdns_xspi_of_match[] = {
{
.compatible = "cdns,xspi-nor",
@ -1268,6 +1294,7 @@ static struct platform_driver cdns_xspi_platform_driver = {
.driver = {
.name = CDNS_XSPI_NAME,
.of_match_table = cdns_xspi_of_match,
.pm = pm_sleep_ptr(&cdns_xspi_pm_ops),
},
};