Hi Peng,
On Tue, May 7, 2019 at 9:30 PM Peng Fan peng.fan@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.fan@nxp.com wrote:
Add pre reloc flag to use this driver before relocation
Signed-off-by: Peng Fan peng.fan@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.cn@gmail.com
Regards, Bin