On Thu, Apr 05, 2012 at 01:23:46PM -0600, Stephen Warren wrote: > On 04/05/2012 12:15 PM, David Brown wrote: > > Some MSM SoCs have a small serial-type "bus" that is used to > > communicate with the PMIC devices. This interface is always > > point-to-point. I'm doing a device-tree conversion of the driver that > > Ken Heitke posted last year <https://lkml.org/lkml/2011/2/17/503>. > > > > A naive conversion to device tree, would result in something like > > this: > > > > qcom,ssbi@500000 { > > compatible = "qcom,ssbi"; > > reg = <0x500000 0x1000>; > > qcom,controller-type = "ssbi"; > > > > qcom,pmic8058@0 { > > reg = <0x0 0x01>; > > ... > > } > > } > > > > There would end up being an extraneous register for the device on the > > other end (there are no addresses), and there would need to be code in > > the ssbi driver to traverse this small tree to find these nodes. > > Isn't that extra code simply: > > of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev); > > That seems like pretty low overhead. True, but it still bothers me to have to have a bogus register. David -- Sent by an employee of the Qualcomm Innovation Center, Inc. The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum. -- To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
