Unverified Commit c5412ec5 authored by Larisa Grigore's avatar Larisa Grigore Committed by Mark Brown
Browse files

spi: spi-fsl-dspi: Reinitialize DSPI regs after resuming for S32G 



After resuming, DSPI registers (MCR and SR) need to be reinitialized for
S32G platforms.

Signed-off-by: default avatarLarisa Grigore <larisa.grigore@nxp.com>
Signed-off-by: default avatarJames Clark <james.clark@linaro.org>
Link: https://patch.msgid.link/20250522-james-nxp-spi-v2-10-bea884630cfb@linaro.org


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 870d6fda

drivers/spi/spi-fsl-dspi.c

+42 −35
Original line number Diff line number Diff line
@@ -1284,41 +1284,6 @@ static const struct of_device_id fsl_dspi_dt_ids[] = { 
};

MODULE_DEVICE_TABLE(of, fsl_dspi_dt_ids);



#ifdef CONFIG_PM_SLEEP

static int dspi_suspend(struct device *dev)

{

	struct fsl_dspi *dspi = dev_get_drvdata(dev);



	if (dspi->irq)

		disable_irq(dspi->irq);

	spi_controller_suspend(dspi->ctlr);

	clk_disable_unprepare(dspi->clk);



	pinctrl_pm_select_sleep_state(dev);



	return 0;

}



static int dspi_resume(struct device *dev)

{

	struct fsl_dspi *dspi = dev_get_drvdata(dev);

	int ret;



	pinctrl_pm_select_default_state(dev);



	ret = clk_prepare_enable(dspi->clk);

	if (ret)

		return ret;

	spi_controller_resume(dspi->ctlr);

	if (dspi->irq)

		enable_irq(dspi->irq);



	return 0;

}

#endif /* CONFIG_PM_SLEEP */



static SIMPLE_DEV_PM_OPS(dspi_pm, dspi_suspend, dspi_resume);



static int dspi_init(struct fsl_dspi *dspi)

{

	unsigned int mcr;
@@ -1354,6 +1319,48 @@ static int dspi_init(struct fsl_dspi *dspi) 
	return 0;

}



#ifdef CONFIG_PM_SLEEP

static int dspi_suspend(struct device *dev)

{

	struct fsl_dspi *dspi = dev_get_drvdata(dev);



	if (dspi->irq)

		disable_irq(dspi->irq);

	spi_controller_suspend(dspi->ctlr);

	clk_disable_unprepare(dspi->clk);



	pinctrl_pm_select_sleep_state(dev);



	return 0;

}



static int dspi_resume(struct device *dev)

{

	struct fsl_dspi *dspi = dev_get_drvdata(dev);

	int ret;



	pinctrl_pm_select_default_state(dev);



	ret = clk_prepare_enable(dspi->clk);

	if (ret)

		return ret;

	spi_controller_resume(dspi->ctlr);



	ret = dspi_init(dspi);

	if (ret) {

		dev_err(dev, "failed to initialize dspi during resume\n");

		return ret;

	}



	if (dspi->irq)

		enable_irq(dspi->irq);



	return 0;

}

#endif /* CONFIG_PM_SLEEP */



static SIMPLE_DEV_PM_OPS(dspi_pm, dspi_suspend, dspi_resume);



static int dspi_target_abort(struct spi_controller *host)

{

	struct fsl_dspi *dspi = spi_controller_get_devdata(host);