Re: 180Mhz is minimal ARM clock required for USB 2.0

2007-03-28 Thread Ivan Tonchev
OK guys, Attached is my workaround for this issue. Implemented and tested against kernel from DVEVM 1.10. Ivan Ivan Tonchev wrote: Hi Andy, Constantine, We're interested in this item too. Is this Kconfig change sufficient for what we want? I'm not sure, but I think there is more to be ch

Re: 180Mhz is minimal ARM clock required for USB 2.0

2007-03-26 Thread David Brownell
On Friday 23 March 2007 6:18 pm, Andy Ngo wrote: > Hi guys, > > On a related USB item, can I built just "one" kernel image that can support > either host or peripheral modes? Our hardware engineer is planning to use a > Xilinx FPGA register to select the termination for the USB host/client > conf

Re: 180Mhz is minimal ARM clock required for USB 2.0

2007-03-26 Thread Ivan Tonchev
Hi Andy, Constantine, We're interested in this item too. Is this Kconfig change sufficient for what we want? I'm not sure, but I think there is more to be changed. It seems to me that Host/Peripheral mode is selected by Kconfig and hardcoded in kernel image. See arch/arm/mach-davinci/board-ev

Re: 180Mhz is minimal ARM clock required for USB 2.0

2007-03-24 Thread Constantine Shulyupin
Yes, it is possibe. You need to make a trick: alter file drivers/usb/musb/Kconfig comment a line: config USB_MUSB_HDRC #depends on USB || USB_GADGET (tested on v1.1) Then configure, compile an use. On Fri, 2007-03-23 at 18:18 -0700, Andy Ngo wrote: > Hi guys, > > On a related USB item, ca

Re: 180Mhz is minimal ARM clock required for USB 2.0

2007-03-24 Thread Constantine Shulyupin
Yes, it is possibe. You need to make a trick: alter file drivers/usb/musb/Kconfig comment a line: config USB_MUSB_HDRC #depends on USB || USB_GADGET (tested on v1.1) Then configure, compile an use. On Fri, 2007-03-23 at 18:18 -0700, Andy Ngo wrote: > Hi guys, > > On a related USB item, ca

Re: 180Mhz is minimal ARM clock required for USB 2.0

2007-03-23 Thread Andy Ngo
Hi guys, On a related USB item, can I built just "one" kernel image that can support either host or peripheral modes? Our hardware engineer is planning to use a Xilinx FPGA register to select the termination for the USB host/client configuration. Hence we can configure USB for host or client b

Re: 180Mhz is minimal ARM clock required for USB 2.0

2007-03-22 Thread Amol Lad
Mhz is minimal ARM clock required for USB 2.0 Hi, I got my answer from TI tech support: "An ARM clock lower than 180Mhz violates the minimum clock frequency requirement to the USB PHY. The VBUS Clock feeding onto USB Controller on the Switch side must be >= to the xclk, which is

180Mhz is minimal ARM clock required for USB 2.0

2007-03-22 Thread Andy Ngo
Hi, I got my answer from TI tech support: "An ARM clock lower than 180Mhz violates the minimum clock frequency requirement to the USB PHY. The VBUS Clock feeding onto USB Controller on the Switch side must be >= to the xclk, which is the necessary 60 Mhz PHY clock, used in our design f