Re: [PATCH 3/4] phy: rockchip-emmc: configure default output tap delay

2016-06-20 Thread Kishon Vijay Abraham I
On Friday 13 May 2016 04:13 AM, Brian Norris wrote: > The output tap delay controls helps maintain the hold requirements for > eMMC. The exact value is dependent on the SoC and other factors, though > it isn't really an exact science. But the default of 0 is not very good, > as it doesn't give th

Re: [PATCH 3/4] phy: rockchip-emmc: configure default output tap delay

2016-06-16 Thread Heiko Stuebner
Am Donnerstag, 12. Mai 2016, 15:43:05 schrieb Brian Norris: > The output tap delay controls helps maintain the hold requirements for > eMMC. The exact value is dependent on the SoC and other factors, though > it isn't really an exact science. But the default of 0 is not very good, > as it doesn't g

Re: [PATCH 3/4] phy: rockchip-emmc: configure default output tap delay

2016-05-16 Thread Doug Anderson
Hi, On Sun, May 15, 2016 at 9:15 PM, Shawn Lin wrote: > Hi Doug, > > > On 2016/5/14 6:25, Doug Anderson wrote: >> >> Hi, >> >> On Thu, May 12, 2016 at 3:43 PM, Brian Norris >> wrote: >>> >>> The output tap delay controls helps maintain the hold requirements for >>> eMMC. The exact value is depen

Re: [PATCH 3/4] phy: rockchip-emmc: configure default output tap delay

2016-05-15 Thread Shawn Lin
Hi Doug, On 2016/5/14 6:25, Doug Anderson wrote: Hi, On Thu, May 12, 2016 at 3:43 PM, Brian Norris wrote: The output tap delay controls helps maintain the hold requirements for eMMC. The exact value is dependent on the SoC and other factors, though it isn't really an exact science. But the de

Re: [PATCH 3/4] phy: rockchip-emmc: configure default output tap delay

2016-05-13 Thread Doug Anderson
Hi, On Thu, May 12, 2016 at 3:43 PM, Brian Norris wrote: > The output tap delay controls helps maintain the hold requirements for > eMMC. The exact value is dependent on the SoC and other factors, though > it isn't really an exact science. But the default of 0 is not very good, > as it doesn't gi

[PATCH 3/4] phy: rockchip-emmc: configure default output tap delay

2016-05-12 Thread Brian Norris
The output tap delay controls helps maintain the hold requirements for eMMC. The exact value is dependent on the SoC and other factors, though it isn't really an exact science. But the default of 0 is not very good, as it doesn't give the eMMC much hold time, so let's bump up to 4 (approx 90 degree