From: Patrice Chotard <[email protected]>
Issue detected by unbinding/binding the stm32 qspi driver as following:
root@stm32mp2:~# echo 40430000.spi > /sys/bus/platform/drivers/stm32-qspi/404300
00.spi/driver/unbind
root@stm32mp2:~# echo 40430000.spi > /sys/bus/platform/drivers/stm32-qspi/bind
[ 969.864021] stm32-qspi 40430000.spi: Unbalanced pm_runtime_enable!
[ 970.225161] spi-nor spi0.0: mx66u51235f (65536 Kbytes)
[ 970.935721] spi-nor spi0.1: mx66u51235f (65536 Kbytes)
Fixes: 9d282c17b023 ("spi: stm32-qspi: Add pm_runtime support")
Signed-off-by: Patrice Chotard <[email protected]>
---
drivers/spi/spi-stm32-qspi.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/spi/spi-stm32-qspi.c b/drivers/spi/spi-stm32-qspi.c
index 2f2ea2c42d6e..3c44bb2fd9b1 100644
--- a/drivers/spi/spi-stm32-qspi.c
+++ b/drivers/spi/spi-stm32-qspi.c
@@ -555,10 +555,15 @@ static const struct spi_controller_mem_ops
stm32_qspi_mem_ops = {
static void stm32_qspi_release(struct stm32_qspi *qspi)
{
+ pm_runtime_get_sync(qspi->dev);
/* disable qspi */
writel_relaxed(0, qspi->io_base + QSPI_CR);
stm32_qspi_dma_free(qspi);
mutex_destroy(&qspi->lock);
+ pm_runtime_put_noidle(qspi->dev);
+ pm_runtime_disable(qspi->dev);
+ pm_runtime_set_suspended(qspi->dev);
+ pm_runtime_dont_use_autosuspend(qspi->dev);
clk_disable_unprepare(qspi->clk);
}
--
2.17.1
