Re: [PATCH 0/3] ARM: OMAP2+: omap_device: add dynamic pinctrl handling
On 07/17/2013 03:30 PM, Grygorii Strashko wrote: On 07/17/2013 02:57 PM, Roger Quadros wrote: Hi Grygorii, On 07/17/2013 02:41 PM, Grygorii Strashko wrote: Hi Tony, Kevin This patch series introduces dynamic pinctrl handling in OMAP device framework in the same way as it was before switching to DT. This allow OMAP devices driver's developers to simply add dynamic pinctrl handling for default, active, idle, sleep PIN states in their drivers by modifying DT definitions only - no modifications in drivers code are not needed. Overall I like the idea but can we make a provision for device drivers to override this default pin state handling? The OMAP EHCI driver is one such special case where the wakeup mechanism is tied to pinctrl states as it uses IO daisy chaining to implement wakeup. So depending on whether wakeup needs to be enabled or not I must be able to chose whether I put the pin in just sleep state or sleep with wakeup state. I think, in this case you can't use default behavior and need to define custom pins states like sleep_wakeup/sleep_no_wakeup and do not define pins state with name sleep', so Device core and OMAP device framework will not touch your pins. Yes, I think this should be fine. Thanks. cheers, -roger -- 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: [PATCH 0/3] ARM: OMAP2+: omap_device: add dynamic pinctrl handling
Hi Grygorii, On 07/17/2013 02:41 PM, Grygorii Strashko wrote: Hi Tony, Kevin This patch series introduces dynamic pinctrl handling in OMAP device framework in the same way as it was before switching to DT. This allow OMAP devices driver's developers to simply add dynamic pinctrl handling for default, active, idle, sleep PIN states in their drivers by modifying DT definitions only - no modifications in drivers code are not needed. Overall I like the idea but can we make a provision for device drivers to override this default pin state handling? The OMAP EHCI driver is one such special case where the wakeup mechanism is tied to pinctrl states as it uses IO daisy chaining to implement wakeup. So depending on whether wakeup needs to be enabled or not I must be able to chose whether I put the pin in just sleep state or sleep with wakeup state. cheers, -roger -- 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: [PATCH 0/3] ARM: OMAP2+: omap_device: add dynamic pinctrl handling
On 07/17/2013 02:57 PM, Roger Quadros wrote: Hi Grygorii, On 07/17/2013 02:41 PM, Grygorii Strashko wrote: Hi Tony, Kevin This patch series introduces dynamic pinctrl handling in OMAP device framework in the same way as it was before switching to DT. This allow OMAP devices driver's developers to simply add dynamic pinctrl handling for default, active, idle, sleep PIN states in their drivers by modifying DT definitions only - no modifications in drivers code are not needed. Overall I like the idea but can we make a provision for device drivers to override this default pin state handling? The OMAP EHCI driver is one such special case where the wakeup mechanism is tied to pinctrl states as it uses IO daisy chaining to implement wakeup. So depending on whether wakeup needs to be enabled or not I must be able to chose whether I put the pin in just sleep state or sleep with wakeup state. I think, in this case you can't use default behavior and need to define custom pins states like sleep_wakeup/sleep_no_wakeup and do not define pins state with name sleep', so Device core and OMAP device framework will not touch your pins. cheers, -roger Regards, -grygorii -- 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
