memory: tegra: Make per-SoC setup more generic

The current per-SoC setup code runs at a fairly arbitrary point during
probe, thereby making it less flexible for other SoC generations. Move
the call around slightly (after only the very basic, common setup that
applies to all SoC generations has been performed), which will allow
it to be used for other implementations.

Signed-off-by: Thierry Reding <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Krzysztof Kozlowski <[e-mail]>

drivers/memory/tegra/mc.c

···
 		return PTR_ERR(mc->clk);
 	}
 
+	mc->debugfs.root = debugfs_create_dir("mc", NULL);
+
+	if (mc->soc->ops && mc->soc->ops->probe) {
+		err = mc->soc->ops->probe(mc);
+		if (err < 0)
+			return err;
+	}
+
 #ifdef CONFIG_ARCH_TEGRA_2x_SOC
 	if (mc->soc == &tegra20_mc_soc) {
 		isr = tegra20_mc_irq;
···
 		dev_err(&pdev->dev, "failed to request IRQ#%u: %d\n", mc->irq,
 			err);
 		return err;
-	}
-
-	mc->debugfs.root = debugfs_create_dir("mc", NULL);
-
-	if (mc->soc->ops && mc->soc->ops->init) {
-		err = mc->soc->ops->init(mc);
-		if (err < 0)
-			dev_err(&pdev->dev, "failed to initialize SoC driver: %d\n",
-				err);
 	}
 
 	err = tegra_mc_reset_setup(mc);

drivers/memory/tegra/tegra20.c

···
 	return 0;
 }
 
-static int tegra20_mc_init(struct tegra_mc *mc)
+static int tegra20_mc_probe(struct tegra_mc *mc)
 {
 	debugfs_create_devm_seqfile(mc->dev, "stats", mc->debugfs.root,
 				    tegra20_mc_stats_show);
···
 }
 
 static const struct tegra_mc_ops tegra20_mc_ops = {
-	.init = tegra20_mc_init,
+	.probe = tegra20_mc_probe,
 	.suspend = tegra20_mc_suspend,
 	.resume = tegra20_mc_resume,
 };

include/soc/tegra/mc.h

···
 };
 
 struct tegra_mc_ops {
-	int (*init)(struct tegra_mc *mc);
+	/*
+	 * @probe: Callback to set up SoC-specific bits of the memory controller. This is called
+	 * after basic, common set up that is done by the SoC-agnostic bits.
+	 */
+	int (*probe)(struct tegra_mc *mc);
 	int (*suspend)(struct tegra_mc *mc);
 	int (*resume)(struct tegra_mc *mc);
 };