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Date: Wed, 7 Jul 2021 10:27:01 +0200
From: Alain Volmat <alain.volmat@...s.st.com>
To: <broonie@...nel.org>, <amelie.delaunay@...s.st.com>
CC: <mcoquelin.stm32@...il.com>, <alexandre.torgue@...s.st.com>,
<linux-spi@...r.kernel.org>,
<linux-stm32@...md-mailman.stormreply.com>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>, <fabrice.gasnier@...s.st.com>,
<alain.volmat@...s.st.com>
Subject: [PATCH v2 2/7] 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@...s.st.com>
---
drivers/spi/spi-stm32.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/spi/spi-stm32.c b/drivers/spi/spi-stm32.c
index a92a28933edb..fe35c5cfb820 100644
--- 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.
@@ -1924,6 +1926,9 @@ 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);
@@ -1935,6 +1940,9 @@ 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;
@@ -1943,6 +1951,7 @@ static int stm32_spi_probe(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);
err_dma_release:
if (spi->dma_tx)
dma_release_channel(spi->dma_tx);
@@ -1967,6 +1976,8 @@ 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)
--
2.25.1
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