From: Khairul Anuar Romli khairul.anuar.romli@altera.com
[ Upstream commit 30dbc1c8d50f13c1581b49abe46fe89f393eacbf ]
Enabling runtime PM allows the kernel to gate clocks and power to idle devices. On SoCFPGA, a warm reset does not fully reinitialize these domains.This leaves devices suspended and powered down, preventing U-Boot or the kernel from reusing them after a warm reset, which breaks the boot process.
Fixes: 4892b374c9b7 ("mtd: spi-nor: cadence-quadspi: Add runtime PM support") CC: stable@vger.kernel.org # 6.12+ Signed-off-by: Khairul Anuar Romli khairul.anuar.romli@altera.com Signed-off-by: Adrian Ng Ho Yin adrianhoyin.ng@altera.com Reviewed-by: Niravkumar L Rabara nirav.rabara@altera.com Reviewed-by: Matthew Gerlach matthew.gerlach@altera.com Link: https://patch.msgid.link/910aad68ba5d948919a7b90fa85a2fadb687229b.1757491372... Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/spi/spi-cadence-quadspi.c | 57 ++++++++++++++++++++----------- 1 file changed, 38 insertions(+), 19 deletions(-)
diff --git a/drivers/spi/spi-cadence-quadspi.c b/drivers/spi/spi-cadence-quadspi.c index d656f36002887..c9eb8004fcc27 100644 --- a/drivers/spi/spi-cadence-quadspi.c +++ b/drivers/spi/spi-cadence-quadspi.c @@ -46,6 +46,7 @@ static_assert(CQSPI_MAX_CHIPSELECT <= SPI_CS_CNT_MAX); #define CQSPI_DMA_SET_MASK BIT(7) #define CQSPI_SUPPORT_DEVICE_RESET BIT(8) #define CQSPI_DISABLE_STIG_MODE BIT(9) +#define CQSPI_DISABLE_RUNTIME_PM BIT(10)
/* Capabilities */ #define CQSPI_SUPPORTS_OCTAL BIT(0) @@ -1468,14 +1469,17 @@ static int cqspi_exec_mem_op(struct spi_mem *mem, const struct spi_mem_op *op) int ret; struct cqspi_st *cqspi = spi_controller_get_devdata(mem->spi->controller); struct device *dev = &cqspi->pdev->dev; + const struct cqspi_driver_platdata *ddata = of_device_get_match_data(dev);
if (refcount_read(&cqspi->inflight_ops) == 0) return -ENODEV;
- ret = pm_runtime_resume_and_get(dev); - if (ret) { - dev_err(&mem->spi->dev, "resume failed with %d\n", ret); - return ret; + if (!(ddata && (ddata->quirks & CQSPI_DISABLE_RUNTIME_PM))) { + ret = pm_runtime_resume_and_get(dev); + if (ret) { + dev_err(&mem->spi->dev, "resume failed with %d\n", ret); + return ret; + } }
if (!refcount_read(&cqspi->refcount)) @@ -1491,8 +1495,10 @@ static int cqspi_exec_mem_op(struct spi_mem *mem, const struct spi_mem_op *op)
ret = cqspi_mem_process(mem, op);
- pm_runtime_mark_last_busy(dev); - pm_runtime_put_autosuspend(dev); + if (!(ddata && (ddata->quirks & CQSPI_DISABLE_RUNTIME_PM))) { + pm_runtime_mark_last_busy(dev); + pm_runtime_put_autosuspend(dev); + }
if (ret) dev_err(&mem->spi->dev, "operation failed with %d\n", ret); @@ -1986,11 +1992,12 @@ static int cqspi_probe(struct platform_device *pdev) goto probe_setup_failed; }
- pm_runtime_enable(dev); - - pm_runtime_set_autosuspend_delay(dev, CQSPI_AUTOSUSPEND_TIMEOUT); - pm_runtime_use_autosuspend(dev); - pm_runtime_get_noresume(dev); + if (!(ddata && (ddata->quirks & CQSPI_DISABLE_RUNTIME_PM))) { + pm_runtime_enable(dev); + pm_runtime_set_autosuspend_delay(dev, CQSPI_AUTOSUSPEND_TIMEOUT); + pm_runtime_use_autosuspend(dev); + pm_runtime_get_noresume(dev); + }
ret = spi_register_controller(host); if (ret) { @@ -1998,13 +2005,17 @@ static int cqspi_probe(struct platform_device *pdev) goto probe_setup_failed; }
- pm_runtime_mark_last_busy(dev); - pm_runtime_put_autosuspend(dev); + if (!(ddata && (ddata->quirks & CQSPI_DISABLE_RUNTIME_PM))) { + pm_runtime_put_autosuspend(dev); + pm_runtime_mark_last_busy(dev); + pm_runtime_put_autosuspend(dev); + }
return 0; probe_setup_failed: cqspi_controller_enable(cqspi, 0); - pm_runtime_disable(dev); + if (!(ddata && (ddata->quirks & CQSPI_DISABLE_RUNTIME_PM))) + pm_runtime_disable(dev); probe_reset_failed: if (cqspi->is_jh7110) cqspi_jh7110_disable_clk(pdev, cqspi); @@ -2015,7 +2026,11 @@ static int cqspi_probe(struct platform_device *pdev)
static void cqspi_remove(struct platform_device *pdev) { + const struct cqspi_driver_platdata *ddata; struct cqspi_st *cqspi = platform_get_drvdata(pdev); + struct device *dev = &pdev->dev; + + ddata = of_device_get_match_data(dev);
refcount_set(&cqspi->refcount, 0);
@@ -2028,14 +2043,17 @@ static void cqspi_remove(struct platform_device *pdev) if (cqspi->rx_chan) dma_release_channel(cqspi->rx_chan);
- if (pm_runtime_get_sync(&pdev->dev) >= 0) - clk_disable(cqspi->clk); + if (!(ddata && (ddata->quirks & CQSPI_DISABLE_RUNTIME_PM))) + if (pm_runtime_get_sync(&pdev->dev) >= 0) + clk_disable(cqspi->clk);
if (cqspi->is_jh7110) cqspi_jh7110_disable_clk(pdev, cqspi);
- pm_runtime_put_sync(&pdev->dev); - pm_runtime_disable(&pdev->dev); + if (!(ddata && (ddata->quirks & CQSPI_DISABLE_RUNTIME_PM))) { + pm_runtime_put_sync(&pdev->dev); + pm_runtime_disable(&pdev->dev); + } }
static int cqspi_runtime_suspend(struct device *dev) @@ -2114,7 +2132,8 @@ static const struct cqspi_driver_platdata socfpga_qspi = { .quirks = CQSPI_DISABLE_DAC_MODE | CQSPI_NO_SUPPORT_WR_COMPLETION | CQSPI_SLOW_SRAM - | CQSPI_DISABLE_STIG_MODE, + | CQSPI_DISABLE_STIG_MODE + | CQSPI_DISABLE_RUNTIME_PM, };
static const struct cqspi_driver_platdata versal_ospi = {