From 940f3bbf3dacd6e31e482a10e64c96e69b00dded Mon Sep 17 00:00:00 2001 From: Alexander Kochetkov Date: Fri, 16 Oct 2020 11:50:14 +0300 Subject: [PATCH] spi: rockchip: enable autosuspend feature If SPI is used for periodic polling any sensor, significant delays sometimes appear. Switching on module clocks during resume lead to delays. Enabling autosuspend mode causes the controller to not suspend between SPI transfers and the delays disappear. Signed-off-by: Alexander Kochetkov Link: https://lore.kernel.org/r/20201016085014.31667-1-al.kochet@gmail.com Signed-off-by: Mark Brown --- drivers/spi/spi-rockchip.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/spi/spi-rockchip.c b/drivers/spi/spi-rockchip.c index 75a8a9428ff8..09d8e92400eb 100644 --- a/drivers/spi/spi-rockchip.c +++ b/drivers/spi/spi-rockchip.c @@ -160,6 +160,8 @@ #define ROCKCHIP_SPI_VER2_TYPE1 0x05EC0002 #define ROCKCHIP_SPI_VER2_TYPE2 0x00110002 +#define ROCKCHIP_AUTOSUSPEND_TIMEOUT 2000 + struct rockchip_spi { struct device *dev; @@ -715,6 +717,8 @@ static int rockchip_spi_probe(struct platform_device *pdev) goto err_disable_spiclk; } + pm_runtime_set_autosuspend_delay(&pdev->dev, ROCKCHIP_AUTOSUSPEND_TIMEOUT); + pm_runtime_use_autosuspend(&pdev->dev); pm_runtime_set_active(&pdev->dev); pm_runtime_enable(&pdev->dev); -- 2.20.1