linux-kernel - [PATCH v3 2/3] soc: mediatek: pwrap: add support for sys & tmr clocks

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Date:   Mon, 31 Oct 2022 10:33:57 +0100
From:   fchiby@...libre.com
To:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Johnson Wang <johnson.wang@...iatek.com>,
        "Zhiyong . Tao" <zhiyong.tao@...iatek.com>
Cc:     Fabien Parent <fparent@...libre.com>,
        Fadwa CHIBY <fchiby@...libre.com>,
        Sen Chu <sen.chu@...iatek.com>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org
Subject: [PATCH v3 2/3] soc: mediatek: pwrap: add support for sys & tmr clocks

From: Fabien Parent <fparent@...libre.com>

MT8365 requires an extra 2 clocks to be enabled to behave correctly.
Add support these 2 clocks, they are made optional since they seem to
be present only on MT8365.

Signed-off-by: Fabien Parent <fparent@...libre.com>
Signed-off-by: Fadwa CHIBY <fchiby@...libre.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
---
 drivers/soc/mediatek/mtk-pmic-wrap.c | 36 ++++++++++++++++++++++++----
 1 file changed, 32 insertions(+), 4 deletions(-)

diff --git a/drivers/soc/mediatek/mtk-pmic-wrap.c b/drivers/soc/mediatek/mtk-pmic-wrap.c
index eb82ae06697f..d56b00023ccd 100644
--- a/drivers/soc/mediatek/mtk-pmic-wrap.c
+++ b/drivers/soc/mediatek/mtk-pmic-wrap.c
@@ -1171,6 +1171,8 @@ struct pmic_wrapper {
 	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;
@@ -2214,6 +2216,20 @@ static int pwrap_probe(struct platform_device *pdev)
 		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;
@@ -2222,6 +2238,14 @@ static int pwrap_probe(struct platform_device *pdev)
 	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;
+
 	/* Enable internal dynamic clock */
 	if (HAS_CAP(wrp->master->caps, PWRAP_CAP_DCM)) {
 		pwrap_writel(wrp, 1, PWRAP_DCM_EN);
@@ -2236,7 +2260,7 @@ 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_out2;
+			goto err_out4;
 		}
 	}
 
@@ -2250,7 +2274,7 @@ 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_out2;
+		goto err_out4;
 	}
 
 	/* Initialize watchdog, may not be done by the bootloader */
@@ -2288,7 +2312,7 @@ static int pwrap_probe(struct platform_device *pdev)
 			       IRQF_TRIGGER_HIGH,
 			       "mt-pmic-pwrap", wrp);
 	if (ret)
-		goto err_out2;
+		goto err_out4;
 
 	wrp->regmap = devm_regmap_init(wrp->dev, NULL, wrp, wrp->slave->regops->regmap);
 	if (IS_ERR(wrp->regmap)) {
@@ -2300,11 +2324,15 @@ static int pwrap_probe(struct platform_device *pdev)
 	if (ret) {
 		dev_dbg(wrp->dev, "failed to create child devices at %pOF\n",
 				np);
-		goto err_out2;
+		goto err_out4;
 	}
 
 	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:
-- 
2.25.1