On Tuesday 12 September 2017 02:44 PM, Baolin Wang wrote: > Hi, > > On 12 September 2017 at 16:48, Sekhar Nori <nsekhar@xxxxxx> wrote: >> On Tuesday 12 September 2017 07:28 AM, Baolin Wang wrote: >>>> @@ -802,13 +821,24 @@ static int davinci_i2c_probe(struct platform_device *pdev) >>>> dev->clk = devm_clk_get(&pdev->dev, NULL); >>>> if (IS_ERR(dev->clk)) >>>> return PTR_ERR(dev->clk); >>>> - clk_prepare_enable(dev->clk); >> >>> You removed clk enable here, I think it can not work if we did not >>> open CONFIG_PM macro. I think you should keep clk enable here, and set >> >> What do you mean by "open CONFIG_PM macro" ? > > If you did not open CONFIG_PM macro, then the pm_runtime_xxx() will be > dummy functions, but now the i2c driver can not work since you did not > enable clock, right? Ah, okay. I am not sure thats a concern on platforms on which this driver is used. Without PM runtime support, most likely the platforms will not boot and multiple drivers will fail. Thanks, Sekhar
