Simon Glass <s...@chromium.org> 于2019年3月31日周日 上午5:19写道： > > Hi Lukasz, > > On Wed, 27 Mar 2019 at 03:34, Lukasz Majewski <lu...@denx.de> wrote: > > > > Hi Simon, Jun, > > > > > Hi Jun, > > > > > > On Fri, 22 Mar 2019 at 16:02, Jun Nie <jun....@linaro.org> wrote: > > > > > > > > Simon Glass <s...@chromium.org> 于2019年3月22日周五 下午3:56写道： > > > > > > > > > > Hi Jun, > > > > > > > > > > On Fri, 22 Mar 2019 at 15:20, Jun Nie <jun....@linaro.org> > > > > > wrote: > > > > > > > > > > > > add skipping init option to avoid corrupt data in console > > > > > > if serial is already initilized when u-boot start its excution. > > > > > > > > > > > > Signed-off-by: Jun Nie <jun....@linaro.org> > > > > > > --- > > > > > > drivers/serial/Kconfig | 6 ++++++ > > > > > > 1 file changed, 6 insertions(+) > > > > > > > > > > Could we use a device-tree property for this? Some UARTs have a > > > > > 'skip-init' property. > > > > > > > > > > Regards, > > > > > Simon > > > > > > > > Hi Simon, > > > > > > > > It is a good suggestion. But device tree is board specific, while > > > > the config is boot flow specific. For ATF -> OPTEE -> U-BOOT case, > > > > initialization should be skipped. Without earlier initialization > > > > from firmware, U-boot should do it by itself. So I need find a > > > > solution that is defconfig specific, instead of device tree > > > > specific. > > > > > > So you want something that is flow-specific, I think. Your thinking is > > > that the defconfig specifies this. Is that because certain boards > > > require ATF/Optee? > > > > > > Should we consider having a way to tell U-Boot that it is running > > > from Optee? > > > > > > Could the UART driver detect that the UART is already inited? > > > > Isn't this issue similar to: > > http://patchwork.ozlabs.org/patch/820824/ > > > > and > > > > http://patchwork.ozlabs.org/patch/865963/ > > > > Yes. But in the case of this patch I'm hoping we don't need it. > > Regards, > Simon
Right, we do not need patch here to skip the initialization. I already add the fix in imx clock side to imx patch set. Thank for suggestion! Jun _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot
