raspi/linux
1
0
Fork 1
mirror of https://github.com/raspberrypi/linux.git synced 2025-12-06 10:00:17 +00:00
Code Issues Projects Releases Wiki Activity

spi: cadence-qspi: defer runtime support on socfpga if reset bit is enabled

Browse Source 
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: 4892b374c9 ("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.git.khairul.anuar.romli@altera.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Khairul Anuar Romli
2025-09-10 16:06:32 +08:00
committed by Mark Brown
parent f83ec76bf2
commit 30dbc1c8d5
1 changed files with 36 additions and 17 deletions
Download Patch File Download Diff File Expand all files Collapse all files

23
drivers/spi/spi-cadence-quadspi.c
View File

@@ -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)
@@ -1468,15 +1469,18 @@ 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;
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))
return -EBUSY;
@@ -1491,6 +1495,7 @@ static int cqspi_exec_mem_op(struct spi_mem *mem, const struct spi_mem_op *op)
ret = cqspi_mem_process(mem, op);
if (!(ddata && (ddata->quirks & CQSPI_DISABLE_RUNTIME_PM)))
pm_runtime_put_autosuspend(dev);
if (ret)
@@ -1985,11 +1990,12 @@ static int cqspi_probe(struct platform_device *pdev)
goto probe_setup_failed;
}
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) {
@@ -1997,11 +2003,16 @@ static int cqspi_probe(struct platform_device *pdev)
goto probe_setup_failed;
}
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);
if (!(ddata && (ddata->quirks & CQSPI_DISABLE_RUNTIME_PM)))
pm_runtime_disable(dev);
probe_reset_failed:
if (cqspi->is_jh7110)
@@ -2013,7 +2024,11 @@ probe_clk_failed:
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);
@@ -2026,15 +2041,18 @@ static void cqspi_remove(struct platform_device *pdev)
if (cqspi->rx_chan)
dma_release_channel(cqspi->rx_chan);
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);
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)
{
@@ -2112,7 +2130,8 @@ 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 = {