reset: rzg2l-usbphy-ctrl: Move reset controller registration

As soon as the reset controller is registered, it could be used by a
reset consumer. That means hardware setup to be done first and then the
registration of the reset controller. So move the registration of reset
controller at the end of probe().

While at it, fix the issue that the reset is not re-asserted in case
devm_reset_controller_register() fails and also use goto statements to
simplify the error path in probe().

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20240610164845.89666-1-biju.das.jz@bp.renesas.com
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

diff --git a/drivers/reset/reset-rzg2l-usbphy-ctrl.c b/drivers/reset/reset-rzg2l-usbphy-ctrl.c
index a8dde46063602dcc799db1e7bac5a3eef9fdf9e7..bea3270fb6983e0df53f5384f44a3713fec22e08 100644 (file)
--- a/drivers/reset/reset-rzg2l-usbphy-ctrl.c
+++ b/drivers/reset/reset-rzg2l-usbphy-ctrl.c
@@ -125,25 +125,14 @@ static int rzg2l_usbphy_ctrl_probe(struct platform_device *pdev)
        if (error)
                return error;
 
-       priv->rcdev.ops = &rzg2l_usbphy_ctrl_reset_ops;
-       priv->rcdev.of_reset_n_cells = 1;
-       priv->rcdev.nr_resets = NUM_PORTS;
-       priv->rcdev.of_node = dev->of_node;
-       priv->rcdev.dev = dev;
-
-       error = devm_reset_controller_register(dev, &priv->rcdev);
-       if (error)
-               return error;
-
        spin_lock_init(&priv->lock);
        dev_set_drvdata(dev, priv);
 
        pm_runtime_enable(&pdev->dev);
        error = pm_runtime_resume_and_get(&pdev->dev);
        if (error < 0) {
-               pm_runtime_disable(&pdev->dev);
-               reset_control_assert(priv->rstc);
-               return dev_err_probe(&pdev->dev, error, "pm_runtime_resume_and_get failed");
+               dev_err_probe(&pdev->dev, error, "pm_runtime_resume_and_get failed");
+               goto err_pm_disable_reset_deassert;
        }
 
        /* put pll and phy into reset state */
@@ -153,7 +142,24 @@ static int rzg2l_usbphy_ctrl_probe(struct platform_device *pdev)
        writel(val, priv->base + RESET);
        spin_unlock_irqrestore(&priv->lock, flags);
 
+       priv->rcdev.ops = &rzg2l_usbphy_ctrl_reset_ops;
+       priv->rcdev.of_reset_n_cells = 1;
+       priv->rcdev.nr_resets = NUM_PORTS;
+       priv->rcdev.of_node = dev->of_node;
+       priv->rcdev.dev = dev;
+
+       error = devm_reset_controller_register(dev, &priv->rcdev);
+       if (error)
+               goto err_pm_runtime_put;
+
        return 0;
+
+err_pm_runtime_put:
+       pm_runtime_put(&pdev->dev);
+err_pm_disable_reset_deassert:
+       pm_runtime_disable(&pdev->dev);
+       reset_control_assert(priv->rstc);
+       return error;
 }
 
 static int rzg2l_usbphy_ctrl_remove(struct platform_device *pdev)