spi: stm32: enable pm_runtime autosuspend

This commit enables the pm_runtime autosuspend
and sets a 1ms autosuspend delay.

Signed-off-by: Alain Volmat <alain.volmat@foss.st.com>
Link: https://lore.kernel.org/r/1625646426-5826-3-git-send-email-alain.volmat@foss.st.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/spi/spi-stm32.c b/drivers/spi/spi-stm32.c
index 05618a618939c0114094aa0ee7340c93abcb9eef..4dbd5cbe0c117b730fcaa1e779e984261a64e846 100644 (file)
--- a/drivers/spi/spi-stm32.c
+++ b/drivers/spi/spi-stm32.c
@@ -162,6 +162,8 @@
 #define SPI_3WIRE_TX           3
 #define SPI_3WIRE_RX           4
 
+#define STM32_SPI_AUTOSUSPEND_DELAY            1       /* 1 ms */
+
 /*
  * use PIO for small transfers, avoiding DMA setup/teardown overhead for drivers
  * without fifo buffers.
@@ -1927,6 +1929,9 @@ static int stm32_spi_probe(struct platform_device *pdev)
        if (spi->dma_tx || spi->dma_rx)
                master->can_dma = stm32_spi_can_dma;
 
+       pm_runtime_set_autosuspend_delay(&pdev->dev,
+                                        STM32_SPI_AUTOSUSPEND_DELAY);
+       pm_runtime_use_autosuspend(&pdev->dev);
        pm_runtime_set_active(&pdev->dev);
        pm_runtime_get_noresume(&pdev->dev);
        pm_runtime_enable(&pdev->dev);
@@ -1938,6 +1943,9 @@ static int stm32_spi_probe(struct platform_device *pdev)
                goto err_pm_disable;
        }
 
+       pm_runtime_mark_last_busy(&pdev->dev);
+       pm_runtime_put_autosuspend(&pdev->dev);
+
        dev_info(&pdev->dev, "driver initialized\n");
 
        return 0;
@@ -1946,6 +1954,7 @@ err_pm_disable:
        pm_runtime_disable(&pdev->dev);
        pm_runtime_put_noidle(&pdev->dev);
        pm_runtime_set_suspended(&pdev->dev);
+       pm_runtime_dont_use_autosuspend(&pdev->dev);
 err_dma_release:
        if (spi->dma_tx)
                dma_release_channel(spi->dma_tx);
@@ -1970,6 +1979,8 @@ static int stm32_spi_remove(struct platform_device *pdev)
        pm_runtime_disable(&pdev->dev);
        pm_runtime_put_noidle(&pdev->dev);
        pm_runtime_set_suspended(&pdev->dev);
+       pm_runtime_dont_use_autosuspend(&pdev->dev);
+
        if (master->dma_tx)
                dma_release_channel(master->dma_tx);
        if (master->dma_rx)