On Thu, Jan 26, 2017 at 10:06 AM, Tony Lindgren <tony@xxxxxxxxxxx> wrote: > * Adam Ford <aford173@xxxxxxxxx> [170126 07:58]: >> On Thu, Jan 26, 2017 at 9:40 AM, Tony Lindgren <tony@xxxxxxxxxxx> wrote: >> > * Woodruff, Richard <r-woodruff2@xxxxxx> [170126 07:14]: >> >> > From: Tony Lindgren [mailto:tony@xxxxxxxxxxx] >> >> > Sent: Thursday, January 26, 2017 9:04 AM >> >> >> >> > Well we do have off mode during idle working for quite a few omap3 based >> >> > boards just fine. And nothing prevents adding board specific >> >> >> >> Sure. >> >> >> >> > I recall playing with a SDIO WLAN card in MMC1 that I needed something >> >> > like this to keep the card enabled during off mode as otherwise VMMC1 >> >> > would get scaled down to 1.8V during idle. >> >> >> >> That seems very possible. As I recall there are 3 power provider groups P1/P2/P3 in that PMIC. Typically the processor is one, a modem is a two, and something like a wlan can be powered on 3. It depends on the board setup. >> >> >> >> When the processor signals an event to the PMIC it will run the script which then sends commands to each group. Some of the PMICs had a lot of programmable options and could get complex. PMICs typically mated with boards in the last few years tended to be a bit less flexible and they cost-removed the SRAM and just have fixed OTP. >> > >> > Looking at omap3_wrst_seq[], maybe adding just one of the following lines >> > to does the trick for reboot: >> > >> > TWL_RESOURCE_RESET(RES_VMMC1), >> > >> > or >> > >> > TWL_RESOURCE_ON(RES_VMMC1), >> > >> >> Tony - >> >> Should I try his suggestion or your patch or both? > > Well whatever works :) We should narrow this down as it sounds like > it can affects other devices too booting from MMC. > >> I am willing to try both. Since there are two options for the >> omap3_wrst_seq (TWL_RESOURCE_RESET and TWL_RESOURCE_ON) do you have a >> recommendation on which one I should do there? > > Try the TWL_RESOURCE_RESET(RES_VMMC1) first and then hopefully the > bootrom or MLO will be able to power it on after reboot. > That did it! It works and I have been able to successfully reboot without issue and the power consumption seems back to normal. At the risk of breaking someone else's board, should I prepare a patch to add that line to the wrst sequence or do you think something else should be reworked first? > Regards, > Thanks guys! adam > Tony -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
