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spi: imx: fix runtime pm support for !CONFIG_PM

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525c9e5a32 introduced pm_runtime support for the i.MX SPI driver. With
this pm_runtime is used to bring up the clocks initially. When CONFIG_PM
is disabled the clocks are no longer enabled and the driver doesn't work
anymore. Fix this by enabling the clocks in the probe function and
telling pm_runtime that the device is active using
pm_runtime_set_active().

Fixes: 525c9e5a32 spi: imx: enable runtime pm support
Tested-by: Christian Eggers <ceggers@arri.de> [tested for !CONFIG_PM only]
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Link: https://lore.kernel.org/r/20201021104513.21560-1-s.hauer@pengutronix.de
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Sascha Hauer 2020-10-21 12:45:13 +02:00 committed by Mark Brown
parent 855a40cd8c
commit 43b6bf406c
No known key found for this signature in database
GPG key ID: 24D68B725D5487D0
1 changed files with 15 additions and 8 deletions
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23
drivers/spi/spi-imx.c
View file

@ -1676,15 +1676,18 @@ static int spi_imx_probe(struct platform_device *pdev)
goto out_master_put;
}
pm_runtime_enable(spi_imx->dev);
ret = clk_prepare_enable(spi_imx->clk_per);
if (ret)
goto out_master_put;
ret = clk_prepare_enable(spi_imx->clk_ipg);
if (ret)
goto out_put_per;
pm_runtime_set_autosuspend_delay(spi_imx->dev, MXC_RPM_TIMEOUT);
pm_runtime_use_autosuspend(spi_imx->dev);
ret = pm_runtime_get_sync(spi_imx->dev);
if (ret < 0) {
dev_err(spi_imx->dev, "failed to enable clock\n");
goto out_runtime_pm_put;
}
pm_runtime_set_active(spi_imx->dev);
pm_runtime_enable(spi_imx->dev);
spi_imx->spi_clk = clk_get_rate(spi_imx->clk_per);
/*
@ -1719,8 +1722,12 @@ static int spi_imx_probe(struct platform_device *pdev)
out_runtime_pm_put:
pm_runtime_dont_use_autosuspend(spi_imx->dev);
pm_runtime_put_sync(spi_imx->dev);
pm_runtime_set_suspended(&pdev->dev);
pm_runtime_disable(spi_imx->dev);
clk_disable_unprepare(spi_imx->clk_ipg);
out_put_per:
clk_disable_unprepare(spi_imx->clk_per);
out_master_put:
spi_master_put(master);