Re: [PATCH 4/5] cpufreq: imx6q: add ldo-bypass support

2015-01-05 Thread Mark Brown
On Mon, Jan 05, 2015 at 06:38:50AM -0800, Tim Harvey wrote: > On Fri, Dec 19, 2014 at 8:23 AM, Mark Brown wrote: > > On Fri, Dec 19, 2014 at 08:17:41AM -0800, Tim Harvey wrote: > >> frequency setpoint. If however you have an external PMIC that is > >> capable of adjusting the VDD_ARM and VDD_SOC

Re: [PATCH 4/5] cpufreq: imx6q: add ldo-bypass support

2015-01-05 Thread Tim Harvey
On Fri, Dec 19, 2014 at 8:23 AM, Mark Brown wrote: > On Fri, Dec 19, 2014 at 08:17:41AM -0800, Tim Harvey wrote: > >> frequency setpoint. If however you have an external PMIC that is >> capable of adjusting the VDD_ARM and VDD_SOC to the IMX6 and an >> appropriate regulator driver is capable of do

Re: [PATCH 4/5] cpufreq: imx6q: add ldo-bypass support

2014-12-19 Thread Mark Brown
On Fri, Dec 19, 2014 at 08:17:41AM -0800, Tim Harvey wrote: > frequency setpoint. If however you have an external PMIC that is > capable of adjusting the VDD_ARM and VDD_SOC to the IMX6 and an > appropriate regulator driver is capable of doing so, you must > configure the cpu nodes vddarm and vdds

Re: [PATCH 4/5] cpufreq: imx6q: add ldo-bypass support

2014-12-19 Thread Tim Harvey
On Thu, Dec 18, 2014 at 6:22 AM, Mark Brown wrote: > On Thu, Dec 18, 2014 at 06:11:15AM -0800, Tim Harvey wrote: >> On Wed, Dec 17, 2014 at 6:36 AM, Fabio Estevam wrote: >> > On Fri, Oct 31, 2014 at 2:27 AM, Tim Harvey wrote: >> >> When an external PMIC is used for VDD_SOC and VDD_ARM you can sa

Re: [PATCH 4/5] cpufreq: imx6q: add ldo-bypass support

2014-12-18 Thread Mark Brown
On Thu, Dec 18, 2014 at 06:11:15AM -0800, Tim Harvey wrote: > On Wed, Dec 17, 2014 at 6:36 AM, Fabio Estevam wrote: > > On Fri, Oct 31, 2014 at 2:27 AM, Tim Harvey wrote: > >> When an external PMIC is used for VDD_SOC and VDD_ARM you can save power by > >> bypassing the internal LDO's provided by

Re: [PATCH 4/5] cpufreq: imx6q: add ldo-bypass support

2014-12-18 Thread Tim Harvey
On Wed, Dec 17, 2014 at 6:36 AM, Fabio Estevam wrote: > Hi Tim, > > On Fri, Oct 31, 2014 at 2:27 AM, Tim Harvey wrote: >> When an external PMIC is used for VDD_SOC and VDD_ARM you can save power by >> bypassing the internal LDO's provided by the anantop regulator as long as >> you are running les

Re: [PATCH 4/5] cpufreq: imx6q: add ldo-bypass support

2014-12-17 Thread Fabio Estevam
Hi Tim, On Fri, Oct 31, 2014 at 2:27 AM, Tim Harvey wrote: > When an external PMIC is used for VDD_SOC and VDD_ARM you can save power by > bypassing the internal LDO's provided by the anantop regulator as long as > you are running less than 1.2GHz. If running at 1.2GHz the IMX6 datasheets > state

[PATCH 4/5] cpufreq: imx6q: add ldo-bypass support

2014-10-30 Thread Tim Harvey
When an external PMIC is used for VDD_SOC and VDD_ARM you can save power by bypassing the internal LDO's provided by the anantop regulator as long as you are running less than 1.2GHz. If running at 1.2GHz the IMX6 datasheets state that you must use the internal LDO's to reduce ripple on the suplies