RE: How to test regulator driver?
I am seriously confused on how to fetch the struct device * in my consumer driver, for an already registered regulator. I am planning to use this consumer driver as a part of my CPU freq/CPU idle framework but I don't know what to pass in regulator_get. Should I register my regulator device as a platform_device as against an i2c_client device what I am having now? Other regulator drivers (drivers/regulator/twl4030-regulator.c, wm8400.c etc) are doing the same thing in their code. Using the current approach, I am facing difficulty in getting the struct device * for invoking the regulator_get()? Otherwise, can I expose one function in my regulator driver which will return the appropriate struct device * when user calls it with a supply name string? This device pointer then will be used in my consumer driver while calling the regulator_get API? Thanks and Regards, Anuj Aggarwal Platform Support Products Texas Instruments Inc Ph: +91-80-2509-9542 TI IP Ph: 509-9542 PSP Products RSS Feed PSP Product Announcements -Original Message- From: linux-omap-ow...@vger.kernel.org [mailto:linux-omap- ow...@vger.kernel.org] On Behalf Of Mark Brown Sent: Monday, March 09, 2009 9:03 PM To: Anuj Aggarwal Cc: Linux OMAP List Subject: Re: How to test regulator driver? On Mon, Mar 09, 2009 at 08:32:55PM +0530, Anuj Aggarwal wrote: I want to test my regulator driver by writing a small kernel module. But I am a little confused as what should be passed as the first argument of regulator_get(). How would the kernel module know about the device pointer that needs to be passed to the _get function? regulator_get() takes the struct device for the consumer as an argument so it depends on what your consumer is. For test purposes there's an existing virtual consumer driver in the tree which should hopefully save you having to write your own - it allows you to poke the settings from sysfs. drivers/regulator/virtual.c Questions like this that aren't OMAP-specific should really be asked on the relevant general list (in this case linux-kernel). -- To unsubscribe from this list: send the line unsubscribe linux-omap in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line unsubscribe linux-omap in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: How to test regulator driver?
On Tue, Mar 24, 2009 at 05:14:58PM +0530, Aggarwal, Anuj wrote: I am seriously confused on how to fetch the struct device * in my consumer driver, for an already registered regulator. I am planning to use this consumer driver as a part of my CPU freq/CPU idle framework but I don't know what to pass in regulator_get. Your consumer driver should not be using the struct device for the regulator when calling regulator_get(). They should never need to know anything about the struct device of the regulator that is providing a supply to them. The consumer should use a fixed device name and the struct device for itself, these will then be resolved to an actual regulator by the core based on the machine constraints. In the specific case of cpufreq where there is no struct device for the consumer use NULL when calling regulator_get(). -- To unsubscribe from this list: send the line unsubscribe linux-omap in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
How to test regulator driver?
Hi, I want to test my regulator driver by writing a small kernel module. But I am a little confused as what should be passed as the first argument of regulator_get(). How would the kernel module know about the device pointer that needs to be passed to the _get function? Thanks, Anuj Aggarwal -- To unsubscribe from this list: send the line unsubscribe linux-omap in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: How to test regulator driver?
On Mon, Mar 09, 2009 at 08:32:55PM +0530, Anuj Aggarwal wrote: I want to test my regulator driver by writing a small kernel module. But I am a little confused as what should be passed as the first argument of regulator_get(). How would the kernel module know about the device pointer that needs to be passed to the _get function? regulator_get() takes the struct device for the consumer as an argument so it depends on what your consumer is. For test purposes there's an existing virtual consumer driver in the tree which should hopefully save you having to write your own - it allows you to poke the settings from sysfs. drivers/regulator/virtual.c Questions like this that aren't OMAP-specific should really be asked on the relevant general list (in this case linux-kernel). -- To unsubscribe from this list: send the line unsubscribe linux-omap in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
