On 01/06/2014 03:51 PM, Joachim Eastwood wrote: > On 6 January 2014 17:28, Nishanth Menon <[email protected]> wrote: >> On 01/01/2014 04:37 PM, Joachim Eastwood wrote: [...] >>> I assume this would work but I don't have a 4430 board to test it on. >>> Unsure about voltage range, but at least 1.0 to 1.4V covers the operation >>> points for cpu in omap443xx.dtsi. >> This will not work. 6030 does not allow voltage to be set over i2c1, >> needs voltage controller/processor to work. > > Well, it allows the LDO regulators to be changed over i2c, but I guess > the SMPS regulators are different.
yes, they are different control paths. To give a relative history: (OMAP3)TWL5030 -> we can control SMPS from either i2c1 OR i2c_SR by flipping a control bit - but only one path at a time. (OMAP4)TWL6030 -> only i2c_SR control allowed for SMPS (OMAP5)Palmas family -> we can control using i2c1 or i2c_SR -> so no real need for using voltage controller for SMPS. that said, it is necessary to use SR path to ensure that AVS also functions. which requires on OMAP4,3 to use i2c_SR. > > > > Anyways, thanks for the information and bugzilla link with links to > the patch postings on the mailing list. Glad to be of help. -- Regards, Nishanth Menon -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
