linux-kernel - [PATCH v2 3/3] soc: mediatek: pwrap: Use devm_clk_bulk_get_all

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Message-ID: <5b1114c538dd5230728592855f89942aec8ef83b.1720331018.git.christophe.jaillet@wanadoo.fr>
Date: Sun,  7 Jul 2024 07:47:22 +0200
From: Christophe JAILLET <christophe.jaillet@...adoo.fr>
To: matthias.bgg@...il.com,
	angelogioacchino.delregno@...labora.com,
	fchiby@...libre.com,
	fparent@...libre.com,
	s.hauer@...gutronix.de
Cc: linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org,
	Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: [PATCH v2 3/3] soc: mediatek: pwrap: Use devm_clk_bulk_get_all_enable()

Use devm_clk_bulk_get_all_enable() to simplify the code and to make sure
that clk_disable_unprepare() is called if the driver is unloaded.

Fixes: 55924157da8c ("soc: mediatek: pwrap: add support for sys & tmr clocks")
Fixes: 1f022d84bd19 ("soc: mediatek: Add PMIC wrapper for MT8135 and MT8173 SoCs")
Suggested-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
Compile tested-only.
I don't know this function, so I fully trust Angelo's analysis. :)

Changes in v2:
   - Add a Suggested-by tag
   - Use devm_clk_bulk_get_all_enable()

v1: https://lore.kernel.org/all/07b3745819c8ba818d4508ed12e93f14f29b80a2.1719652155.git.christophe.jaillet@wanadoo.fr/
---
 drivers/soc/mediatek/mtk-pmic-wrap.c | 82 ++++------------------------
 1 file changed, 12 insertions(+), 70 deletions(-)

diff --git a/drivers/soc/mediatek/mtk-pmic-wrap.c b/drivers/soc/mediatek/mtk-pmic-wrap.c
index d57553486383..9fdc0ef79202 100644
--- a/drivers/soc/mediatek/mtk-pmic-wrap.c
+++ b/drivers/soc/mediatek/mtk-pmic-wrap.c
@@ -1366,10 +1366,6 @@ struct pmic_wrapper {
 	struct regmap *regmap;
 	const struct pmic_wrapper_type *master;
 	const struct pwrap_slv_type *slave;
-	struct clk *clk_spi;
-	struct clk *clk_wrap;
-	struct clk *clk_sys;
-	struct clk *clk_tmr;
 	struct reset_control *rstc;
 
 	struct reset_control *rstc_bridge;
@@ -2472,6 +2468,7 @@ static int pwrap_probe(struct platform_device *pdev)
 	int ret, irq;
 	u32 mask_done;
 	struct pmic_wrapper *wrp;
+	struct clk_bulk_data *clk;
 	struct device_node *np = pdev->dev.of_node;
 	const struct of_device_id *of_slave_id = NULL;
 
@@ -2521,49 +2518,10 @@ static int pwrap_probe(struct platform_device *pdev)
 		}
 	}
 
-	wrp->clk_spi = devm_clk_get(wrp->dev, "spi");
-	if (IS_ERR(wrp->clk_spi)) {
-		dev_dbg(wrp->dev, "failed to get clock: %ld\n",
-			PTR_ERR(wrp->clk_spi));
-		return PTR_ERR(wrp->clk_spi);
-	}
-
-	wrp->clk_wrap = devm_clk_get(wrp->dev, "wrap");
-	if (IS_ERR(wrp->clk_wrap)) {
-		dev_dbg(wrp->dev, "failed to get clock: %ld\n",
-			PTR_ERR(wrp->clk_wrap));
-		return PTR_ERR(wrp->clk_wrap);
-	}
-
-	wrp->clk_sys = devm_clk_get_optional(wrp->dev, "sys");
-	if (IS_ERR(wrp->clk_sys)) {
-		return dev_err_probe(wrp->dev, PTR_ERR(wrp->clk_sys),
-				     "failed to get clock: %pe\n",
-				     wrp->clk_sys);
-	}
-
-	wrp->clk_tmr = devm_clk_get_optional(wrp->dev, "tmr");
-	if (IS_ERR(wrp->clk_tmr)) {
-		return dev_err_probe(wrp->dev, PTR_ERR(wrp->clk_tmr),
-				     "failed to get clock: %pe\n",
-				     wrp->clk_tmr);
-	}
-
-	ret = clk_prepare_enable(wrp->clk_spi);
-	if (ret)
-		return ret;
-
-	ret = clk_prepare_enable(wrp->clk_wrap);
+	ret = devm_clk_bulk_get_all_enable(wrp->dev, &clk);
 	if (ret)
-		goto err_out1;
-
-	ret = clk_prepare_enable(wrp->clk_sys);
-	if (ret)
-		goto err_out2;
-
-	ret = clk_prepare_enable(wrp->clk_tmr);
-	if (ret)
-		goto err_out3;
+		return dev_err_probe(wrp->dev, ret,
+				     "failed to get clocks\n");
 
 	/* Enable internal dynamic clock */
 	if (HAS_CAP(wrp->master->caps, PWRAP_CAP_DCM)) {
@@ -2579,7 +2537,7 @@ static int pwrap_probe(struct platform_device *pdev)
 		ret = pwrap_init(wrp);
 		if (ret) {
 			dev_dbg(wrp->dev, "init failed with %d\n", ret);
-			goto err_out4;
+			return ret;
 		}
 	}
 
@@ -2592,8 +2550,7 @@ static int pwrap_probe(struct platform_device *pdev)
 
 	if (!(pwrap_readl(wrp, PWRAP_WACS2_RDATA) & mask_done)) {
 		dev_dbg(wrp->dev, "initialization isn't finished\n");
-		ret = -ENODEV;
-		goto err_out4;
+		return -ENODEV;
 	}
 
 	/* Initialize watchdog, may not be done by the bootloader */
@@ -2622,42 +2579,27 @@ static int pwrap_probe(struct platform_device *pdev)
 		pwrap_writel(wrp, wrp->master->int1_en_all, PWRAP_INT1_EN);
 
 	irq = platform_get_irq(pdev, 0);
-	if (irq < 0) {
-		ret = irq;
-		goto err_out2;
-	}
+	if (irq < 0)
+		return irq;
 
 	ret = devm_request_irq(wrp->dev, irq, pwrap_interrupt,
 			       IRQF_TRIGGER_HIGH,
 			       "mt-pmic-pwrap", wrp);
 	if (ret)
-		goto err_out4;
+		return ret;
 
 	wrp->regmap = devm_regmap_init(wrp->dev, NULL, wrp, wrp->slave->regops->regmap);
-	if (IS_ERR(wrp->regmap)) {
-		ret = PTR_ERR(wrp->regmap);
-		goto err_out2;
-	}
+	if (IS_ERR(wrp->regmap))
+		return PTR_ERR(wrp->regmap);
 
 	ret = of_platform_populate(np, NULL, NULL, wrp->dev);
 	if (ret) {
 		dev_dbg(wrp->dev, "failed to create child devices at %pOF\n",
 				np);
-		goto err_out4;
+		return ret;
 	}
 
 	return 0;
-
-err_out4:
-	clk_disable_unprepare(wrp->clk_tmr);
-err_out3:
-	clk_disable_unprepare(wrp->clk_sys);
-err_out2:
-	clk_disable_unprepare(wrp->clk_wrap);
-err_out1:
-	clk_disable_unprepare(wrp->clk_spi);
-
-	return ret;
 }
 
 static struct platform_driver pwrap_drv = {
-- 
2.45.2