Hi Miquel,
i have some confusion when i prepare the patches. for DT compatibility,
it falls back to the old DT when failed to get resource by the new DT,
but there is some points:
a. old DT depends on MMC sub clock driver, but it never be merged, so it
can't work.
b. if it falls back to the old DT, beside the regmap lookup below, it
seems that we have to preserve the code of the old clock setting in
nfc_clk_init(). do we still need to avoid break DT compatibility?
Thanks.
On 2022/4/11 10:40, Liang Yang wrote:
nfc->dev = dev;
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- nfc->reg_base = devm_ioremap_resource(dev, res);
+ nfc->reg_base = devm_platform_ioremap_resource_byname(pdev, "nfc");
This change seems unrelated.
To be consistent with the following
devm_platform_ioremap_resource_byname(pdev, "emmc"). do you mean that we
don't need it?>
if (IS_ERR(nfc->reg_base))
return PTR_ERR(nfc->reg_base);
- nfc->reg_clk =
- syscon_regmap_lookup_by_phandle(dev->of_node,
- "amlogic,mmc-syscon");
- if (IS_ERR(nfc->reg_clk)) {
- dev_err(dev, "Failed to lookup clock base\n");
- return PTR_ERR(nfc->reg_clk);
- }
+ nfc->sd_emmc_clock = devm_platform_ioremap_resource_byname(pdev,
"emmc");
+ if (IS_ERR(nfc->sd_emmc_clock))
+ return PTR_ERR(nfc->sd_emmc_clock);
While I agree this is much better than the previous solution, we cannot
break DT compatibility, so you need to try getting the emmc clock, but
if it fails you should fallback to the regmap lookup.
ok, i will fix it next version. thanks.
irq = platform_get_irq(pdev, 0);
