From: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx> commit 43b6bf406cd0319e522638f97c9086b7beebaeaa upstream. 525c9e5a32bd 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: 525c9e5a32bd spi: imx: enable runtime pm support Tested-by: Christian Eggers <ceggers@xxxxxxx> [tested for !CONFIG_PM only] Signed-off-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx> Link: https://lore.kernel.org/r/20201021104513.21560-1-s.hauer@xxxxxxxxxxxxxx Signed-off-by: Mark Brown <broonie@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/spi/spi-imx.c | 23 +++++++++++++++-------- 1 file changed, 15 insertions(+), 8 deletions(-) --- a/drivers/spi/spi-imx.c +++ b/drivers/spi/spi-imx.c @@ -1676,15 +1676,18 @@ static int spi_imx_probe(struct platform 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); /* @@ -1721,8 +1724,12 @@ static int spi_imx_probe(struct platform 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);
