diff options
| author | Larisa Grigore <larisa.grigore@nxp.com> | 2025-05-22 15:51:39 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2025-06-08 23:35:35 +0100 |
| commit | c5412ec5f687732f9722bd0f94f9632ad78f4c52 (patch) | |
| tree | c814f102f6e5101412fd1fa19b5ed3ae14322300 /drivers/spi/spi-fsl-dspi.c | |
| parent | 870d6fda18d590df88beac9b0504f810807a5ed6 (diff) | |
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: Larisa Grigore <larisa.grigore@nxp.com>
Signed-off-by: James Clark <james.clark@linaro.org>
Link: https://patch.msgid.link/20250522-james-nxp-spi-v2-10-bea884630cfb@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi/spi-fsl-dspi.c')
| -rw-r--r-- | drivers/spi/spi-fsl-dspi.c | 77 |
1 files changed, 42 insertions, 35 deletions
diff --git a/drivers/spi/spi-fsl-dspi.c b/drivers/spi/spi-fsl-dspi.c index db5a2ed66f68..a3efe1bd3b37 100644 --- a/drivers/spi/spi-fsl-dspi.c +++ b/drivers/spi/spi-fsl-dspi.c @@ -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); |