Unverified Commit db6a59cf authored by Jisheng Zhang's avatar Jisheng Zhang Committed by Mark Brown
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spi: cadence-xspi: support suspend/resume 



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: default avatarJisheng Zhang <jszhang@kernel.org>
Link: https://patch.msgid.link/20260122155119.12865-1-jszhang@kernel.org


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent e73eb6a7

drivers/spi/spi-cadence-xspi.c

+28 −1
Original line number Diff line number Diff line
@@ -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),

	},

};