20.12.2022 19:02, Sumit Gupta пишет:
> static int tegra186_emc_probe(struct platform_device *pdev)
> {
> struct mrq_emc_dvfs_latency_response response;
> struct tegra_bpmp_message msg;
> struct tegra186_emc *emc;
> + struct tegra_mc *mc;
> unsigned int i;
> int err;
>
> @@ -158,6 +307,9 @@ static int tegra186_emc_probe(struct platform_device *pdev)
> if (!emc)
> return -ENOMEM;
>
> + platform_set_drvdata(pdev, emc);
> + emc->dev = &pdev->dev;
> +
> emc->bpmp = tegra_bpmp_get(&pdev->dev);
> if (IS_ERR(emc->bpmp))
> return dev_err_probe(&pdev->dev, PTR_ERR(emc->bpmp), "failed to get BPMP\n");
> @@ -236,6 +388,19 @@ static int tegra186_emc_probe(struct platform_device *pdev)
> debugfs_create_file("max_rate", S_IRUGO | S_IWUSR, emc->debugfs.root,
> emc, &tegra186_emc_debug_max_rate_fops);
>
> + mc = dev_get_drvdata(emc->dev->parent);
> + if (mc && mc->soc->icc_ops) {
> + if (tegra_bpmp_mrq_is_supported(emc->bpmp, MRQ_BWMGR_INT)) {
> + err = tegra_emc_interconnect_init(emc);
> + if (!err)
> + return err;
> + dev_err(&pdev->dev, "tegra_emc_interconnect_init failed:%d\n", err);
> + goto put_bpmp;
> + } else {
> + dev_info(&pdev->dev, "MRQ_BWMGR_INT not present\n");
> + }
If there is no MRQ_BWMGR_INT, then device drivers using ICC won't probe.
This is either a error condition, or ICC should inited and then ICC
changes should be skipped.
