Patch "stmmac: dwmac-mediatek: fix clock issue" has been added to the 5.18-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    stmmac: dwmac-mediatek: fix clock issue

to the 5.18-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     stmmac-dwmac-mediatek-fix-clock-issue.patch
and it can be found in the queue-5.18 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit c6d91967bbf3bd30fb3e39202baba6fb0fa03980
Author: Biao Huang <biao.huang@xxxxxxxxxxxx>
Date:   Thu Jul 14 14:00:12 2022 +0800

    stmmac: dwmac-mediatek: fix clock issue
    
    [ Upstream commit fa4b3ca60e8011d3046765b3de8d3f1ffc53af28 ]
    
    The pm_runtime takes care of the clock handling in current
    stmmac drivers, and dwmac-mediatek implement the
    mediatek_dwmac_clks_config() as the callback for pm_runtime.
    
    Then, stripping duplicated clocks handling in old init()/exit()
    to fix clock issue in suspend/resume test.
    
    As to clocks in probe/remove, vendor need symmetric handling to
    ensure clocks balance.
    
    Test pass, including suspend/resume and ko insertion/remove.
    
    Fixes: 3186bdad97d5 ("stmmac: dwmac-mediatek: add platform level clocks management")
    Signed-off-by: Biao Huang <biao.huang@xxxxxxxxxxxx>
    Reviewed-by: Matthias Brugger <matthias.bgg@xxxxxxxxx>
    Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-mediatek.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-mediatek.c
index 6ff88df58767..ca8ab290013c 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-mediatek.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-mediatek.c
@@ -576,32 +576,7 @@ static int mediatek_dwmac_init(struct platform_device *pdev, void *priv)
 		}
 	}
 
-	ret = clk_bulk_prepare_enable(variant->num_clks, plat->clks);
-	if (ret) {
-		dev_err(plat->dev, "failed to enable clks, err = %d\n", ret);
-		return ret;
-	}
-
-	ret = clk_prepare_enable(plat->rmii_internal_clk);
-	if (ret) {
-		dev_err(plat->dev, "failed to enable rmii internal clk, err = %d\n", ret);
-		goto err_clk;
-	}
-
 	return 0;
-
-err_clk:
-	clk_bulk_disable_unprepare(variant->num_clks, plat->clks);
-	return ret;
-}
-
-static void mediatek_dwmac_exit(struct platform_device *pdev, void *priv)
-{
-	struct mediatek_dwmac_plat_data *plat = priv;
-	const struct mediatek_dwmac_variant *variant = plat->variant;
-
-	clk_disable_unprepare(plat->rmii_internal_clk);
-	clk_bulk_disable_unprepare(variant->num_clks, plat->clks);
 }
 
 static int mediatek_dwmac_clks_config(void *priv, bool enabled)
@@ -643,7 +618,6 @@ static int mediatek_dwmac_common_data(struct platform_device *pdev,
 	plat->addr64 = priv_plat->variant->dma_bit_mask;
 	plat->bsp_priv = priv_plat;
 	plat->init = mediatek_dwmac_init;
-	plat->exit = mediatek_dwmac_exit;
 	plat->clks_config = mediatek_dwmac_clks_config;
 	if (priv_plat->variant->dwmac_fix_mac_speed)
 		plat->fix_mac_speed = priv_plat->variant->dwmac_fix_mac_speed;
@@ -712,13 +686,32 @@ static int mediatek_dwmac_probe(struct platform_device *pdev)
 	mediatek_dwmac_common_data(pdev, plat_dat, priv_plat);
 	mediatek_dwmac_init(pdev, priv_plat);
 
+	ret = mediatek_dwmac_clks_config(priv_plat, true);
+	if (ret)
+		return ret;
+
 	ret = stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);
 	if (ret) {
 		stmmac_remove_config_dt(pdev, plat_dat);
-		return ret;
+		goto err_drv_probe;
 	}
 
 	return 0;
+
+err_drv_probe:
+	mediatek_dwmac_clks_config(priv_plat, false);
+	return ret;
+}
+
+static int mediatek_dwmac_remove(struct platform_device *pdev)
+{
+	struct mediatek_dwmac_plat_data *priv_plat = get_stmmac_bsp_priv(&pdev->dev);
+	int ret;
+
+	ret = stmmac_pltfr_remove(pdev);
+	mediatek_dwmac_clks_config(priv_plat, false);
+
+	return ret;
 }
 
 static const struct of_device_id mediatek_dwmac_match[] = {
@@ -733,7 +726,7 @@ MODULE_DEVICE_TABLE(of, mediatek_dwmac_match);
 
 static struct platform_driver mediatek_dwmac_driver = {
 	.probe  = mediatek_dwmac_probe,
-	.remove = stmmac_pltfr_remove,
+	.remove = mediatek_dwmac_remove,
 	.driver = {
 		.name           = "dwmac-mediatek",
 		.pm		= &stmmac_pltfr_pm_ops,