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| author | Quanyang Wang <quanyang.wang@windriver.com> | 2021-04-16 08:46:49 +0800 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2021-04-16 13:44:12 +0100 |
| commit | 799f923f0a66a9c99f0a3eaa078b306db7a8b33a (patch) | |
| tree | d8bbecff1f9f723ca48693e7e58250f21ce776ac /drivers/spi | |
| parent | c6bdae08012b2ca3e94f3a41ef4ca8cfe7c9ab6f (diff) | |
| download | linux-799f923f0a66a9c99f0a3eaa078b306db7a8b33a.tar.bz2 | |
spi: spi-zynqmp-gqspi: fix hang issue when suspend/resume
After calling platform_set_drvdata(pdev, xqspi) in probe, the return
value of dev_get_drvdata(dev) is a pointer to struct zynqmp_qspi but
not struct spi_controller. A wrong structure type passing to the
functions spi_controller_suspend/resume will hang the system.
And we should check the return value of spi_controller_suspend, if
an error is returned, return it to PM subsystem to stop suspend.
Also, GQSPI_EN_MASK should be written to GQSPI_EN_OFST to enable
the spi controller in zynqmp_qspi_resume since it was disabled in
zynqmp_qspi_suspend before.
Fixes: 1c26372e5aa9 ("spi: spi-zynqmp-gqspi: Update driver to use spi-mem framework")
Signed-off-by: Quanyang Wang <quanyang.wang@windriver.com>
Link: https://lore.kernel.org/r/20210416004652.2975446-3-quanyang.wang@windriver.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi-zynqmp-gqspi.c | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/drivers/spi/spi-zynqmp-gqspi.c b/drivers/spi/spi-zynqmp-gqspi.c index f9056f0a480c..1146359528b9 100644 --- a/drivers/spi/spi-zynqmp-gqspi.c +++ b/drivers/spi/spi-zynqmp-gqspi.c @@ -157,6 +157,7 @@ enum mode_type {GQSPI_MODE_IO, GQSPI_MODE_DMA}; * @data_completion: completion structure */ struct zynqmp_qspi { + struct spi_controller *ctlr; void __iomem *regs; struct clk *refclk; struct clk *pclk; @@ -827,10 +828,13 @@ static void zynqmp_qspi_read_op(struct zynqmp_qspi *xqspi, u8 rx_nbits, */ static int __maybe_unused zynqmp_qspi_suspend(struct device *dev) { - struct spi_controller *ctlr = dev_get_drvdata(dev); - struct zynqmp_qspi *xqspi = spi_controller_get_devdata(ctlr); + struct zynqmp_qspi *xqspi = dev_get_drvdata(dev); + struct spi_controller *ctlr = xqspi->ctlr; + int ret; - spi_controller_suspend(ctlr); + ret = spi_controller_suspend(ctlr); + if (ret) + return ret; zynqmp_gqspi_write(xqspi, GQSPI_EN_OFST, 0x0); @@ -848,7 +852,10 @@ static int __maybe_unused zynqmp_qspi_suspend(struct device *dev) */ static int __maybe_unused zynqmp_qspi_resume(struct device *dev) { - struct spi_controller *ctlr = dev_get_drvdata(dev); + struct zynqmp_qspi *xqspi = dev_get_drvdata(dev); + struct spi_controller *ctlr = xqspi->ctlr; + + zynqmp_gqspi_write(xqspi, GQSPI_EN_OFST, GQSPI_EN_MASK); spi_controller_resume(ctlr); @@ -865,7 +872,7 @@ static int __maybe_unused zynqmp_qspi_resume(struct device *dev) */ static int __maybe_unused zynqmp_runtime_suspend(struct device *dev) { - struct zynqmp_qspi *xqspi = (struct zynqmp_qspi *)dev_get_drvdata(dev); + struct zynqmp_qspi *xqspi = dev_get_drvdata(dev); clk_disable_unprepare(xqspi->refclk); clk_disable_unprepare(xqspi->pclk); @@ -883,7 +890,7 @@ static int __maybe_unused zynqmp_runtime_suspend(struct device *dev) */ static int __maybe_unused zynqmp_runtime_resume(struct device *dev) { - struct zynqmp_qspi *xqspi = (struct zynqmp_qspi *)dev_get_drvdata(dev); + struct zynqmp_qspi *xqspi = dev_get_drvdata(dev); int ret; ret = clk_prepare_enable(xqspi->pclk); @@ -1090,6 +1097,7 @@ static int zynqmp_qspi_probe(struct platform_device *pdev) xqspi = spi_controller_get_devdata(ctlr); xqspi->dev = dev; + xqspi->ctlr = ctlr; platform_set_drvdata(pdev, xqspi); xqspi->regs = devm_platform_ioremap_resource(pdev, 0); |