> On 05/18/2013 09:13 PM, Lubomir Popov wrote: > >> Hi Gilles, >> >>> On 05/16/2013 10:39 AM, Lubomir Popov wrote: >>> >>>> Hi Gilles, >>>> >>>> On 16/05/13 01:31, Gilles Chanteperdrix wrote: >>>>> On 05/15/2013 05:55 PM, Lubomir Popov wrote: >>>>> >>>>>> Prerequisites: appropriate patches to the USB EHCI and Eth >>>>>> drivers, and to the OMAP5 clock register definitions. >>>>> >>>>> >>>>> Hi Lubomir, >>>>> >>>>> I have been trying to get the USB working on omap5 uEVM yesterday. In >>>>> addition to your code, I added the changes necessary to pinmux the 79 >>>>> and 80 GPIOS correctly, but it does not seem to work. I suspect there >>>>> is >>>>> something else missing than simply USB specific bits, because when >>>>> the >>>>> ethernet phy is supposedly out of reset, the ethernet leds keep >>>>> turned >>>>> off. I was thinking about checking the PMIC registers. >>>> PMIC wouldn't be related. >>> >>> >>> Hi, >>> >>> My idea was that if the ethernet chip does not power up, maybe it is >>> because some LDO or SMPS needs to be powered on. The board >>> documentation >>> says for some LDOs that they are enabled on boot and does not say for >>> others, so that may be because they need to be enabled. >> Both USB devices are powered by VCC_3V3_MAIN, provided by an external >> SMPS >> chip (U3). With the default configuration of the uEVM, this SMPS turns >> on >> whenever DC wall power is present; the other option - control by the >> PMIC >> SYSEN1 output, has no relation to software as well (SYSEN1 is driven by >> the PMIC power-on/off sequencer, which is burnt into the PMIC EPROM. >> Upon >> power-on it goes high at the very beginning of the sequence). So, >> unfortunately, this could not be the cause. >> Regarding the Ethernet LEDs, as far as I remember, they didn't light up >> at >> all, although Ethernet worked. The smsc95xx driver in u-boot supports >> the >> LAN9730 in compatibility mode and probably does not setup LED operation >> properly. > > > Reading the schematics, it seems to me that the ethernet reset arrives > on a component using 1.8V which if I am not mistaken comes from the PMIC > SMPS7. > Well, this (1.8 V) is the main I/O supply of the OMAP and most peripherals; if it were not OK, the board wouldn't work at all. > -- > Gilles. > BR Lubo
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