Drivers that enable runtime PM must make sure that the controller is runtime resumed before accessing its registers to prevent the power domain from being disabled.

Fixes: 892df0191b29 ("clk: qcom: Add QCS404 TuringCC") Cc: stable@vger.kernel.org # 5.2 Cc: Bjorn Andersson andersson@kernel.org Signed-off-by: Johan Hovold johan+linaro@kernel.org --- drivers/clk/qcom/turingcc-qcs404.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/clk/qcom/turingcc-qcs404.c b/drivers/clk/qcom/turingcc-qcs404.c index 43184459228f..2cd288d6c3e4 100644 --- a/drivers/clk/qcom/turingcc-qcs404.c +++ b/drivers/clk/qcom/turingcc-qcs404.c @@ -125,11 +125,22 @@ static int turingcc_probe(struct platform_device *pdev) return ret; }

+ ret = pm_runtime_resume_and_get(&pdev->dev); + if (ret) + return ret; + ret = qcom_cc_probe(pdev, &turingcc_desc); if (ret < 0) - return ret; + goto err_put_rpm; + + pm_runtime_put(&pdev->dev);

return 0; + +err_put_rpm: + pm_runtime_put_sync(&pdev->dev); + + return ret; }

static const struct dev_pm_ops turingcc_pm_ops = {