Hi Peng, On Tue, May 7, 2019 at 9:30 PM Peng Fan <peng....@nxp.com> wrote: > > > Subject: Re: [i.MX8MM+CCF 12/41] clk: fixed_rate: add pre reloc flag > > > > On Tue, 30 Apr 2019 10:18:12 +0000 > > Peng Fan <peng....@nxp.com> wrote: > > > > > Add pre reloc flag to use this driver before relocation > > > > > > Signed-off-by: Peng Fan <peng....@nxp.com> > > > --- > > > drivers/clk/clk_fixed_rate.c | 1 + > > > 1 file changed, 1 insertion(+) > > > > > > diff --git a/drivers/clk/clk_fixed_rate.c > > > b/drivers/clk/clk_fixed_rate.c index 069e643fbc..debada1463 100644 > > > --- a/drivers/clk/clk_fixed_rate.c > > > +++ b/drivers/clk/clk_fixed_rate.c > > > @@ -45,4 +45,5 @@ U_BOOT_DRIVER(clk_fixed_rate) = { > > > .ofdata_to_platdata = clk_fixed_rate_ofdata_to_platdata, > > > .platdata_auto_alloc_size = sizeof(struct clk_fixed_rate), > > > .ops = &clk_fixed_rate_ops, > > > + .flags = DM_FLAG_PRE_RELOC, > > > }; > > > > This probably shall be done with proper dts file (from TPC70 - imx6q > > conversion code): > > My understanding is DM_FLAG_PRE_RELOC will let the driver could be used > before relocation. The dts u-boot,dm-spl or u-boot,dm-pre-reloc > is just to mark the device could be used at the corresponding stage. > Only modify dts will not make it work without the DM_FLAG_PRE_RELOC, > Right? >
I think your understanding is correct. For device tree that cannot be modified by U-Boot, eg: DT passed from previous bootloader, the only way to support pre-relocation binding is to add DM_FLAG_PRE_RELOC in the U-Boot driver. Reviewed-by: Bin Meng <bmeng...@gmail.com> Regards, Bin _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot