linux-kernel - [PATCH v1 5/7] soc: starfive: Use call back to parse device tree resources

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Message-ID: <20230411064743.273388-6-changhuang.liang@starfivetech.com>
Date:   Mon, 10 Apr 2023 23:47:41 -0700
From:   Changhuang Liang <changhuang.liang@...rfivetech.com>
To:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Emil Renner Berthing <kernel@...il.dk>,
        Conor Dooley <conor@...nel.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>
CC:     Walker Chen <walker.chen@...rfivetech.com>,
        Changhuang Liang <changhuang.liang@...rfivetech.com>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-riscv@...ts.infradead.org>
Subject: [PATCH v1 5/7] soc: starfive: Use call back to parse device tree resources

Different compatible parse device tree resources work in different ways.

Signed-off-by: Changhuang Liang <changhuang.liang@...rfivetech.com>
---
 drivers/soc/starfive/jh71xx_pmu.c | 54 ++++++++++++++++++++++---------
 1 file changed, 39 insertions(+), 15 deletions(-)

diff --git a/drivers/soc/starfive/jh71xx_pmu.c b/drivers/soc/starfive/jh71xx_pmu.c
index 98f6849d61de..990db6735c48 100644
--- a/drivers/soc/starfive/jh71xx_pmu.c
+++ b/drivers/soc/starfive/jh71xx_pmu.c
@@ -57,10 +57,14 @@ struct jh71xx_domain_info {
 	u8 bit;
 };
 
+struct jh71xx_pmu;
+
 struct jh71xx_pmu_match_data {
 	const struct jh71xx_domain_info *domain_info;
 	int num_domains;
 	u8 pmu_type;
+	int (*pmu_parse_dt)(struct platform_device *pdev,
+			    struct jh71xx_pmu *pmu);
 };
 
 struct jh71xx_pmu {
@@ -251,6 +255,31 @@ static irqreturn_t jh71xx_pmu_interrupt(int irq, void *data)
 	return IRQ_HANDLED;
 }
 
+static int jh7110_pmu_general_parse_dt(struct platform_device *pdev,
+				       struct jh71xx_pmu *pmu)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node;
+	int ret;
+
+	pmu->base = device_node_to_regmap(np);
+	if (IS_ERR(pmu->base))
+		return PTR_ERR(pmu->base);
+
+	pmu->irq = platform_get_irq(pdev, 0);
+	if (pmu->irq < 0)
+		return pmu->irq;
+
+	ret = devm_request_irq(dev, pmu->irq, jh71xx_pmu_interrupt,
+			       0, pdev->name, pmu);
+	if (ret)
+		dev_err(dev, "failed to request irq\n");
+
+	jh71xx_pmu_int_enable(pmu, JH71XX_PMU_INT_ALL_MASK & ~JH71XX_PMU_INT_PCH_FAIL, true);
+
+	return 0;
+}
+
 static int jh71xx_pmu_init_domain(struct jh71xx_pmu *pmu, int index)
 {
 	struct jh71xx_pmu_dev *pmd;
@@ -296,23 +325,20 @@ static int jh71xx_pmu_probe(struct platform_device *pdev)
 	if (!pmu)
 		return -ENOMEM;
 
-	pmu->base = device_node_to_regmap(np);
-	if (IS_ERR(pmu->base))
-		return PTR_ERR(pmu->base);
-
-	pmu->irq = platform_get_irq(pdev, 0);
-	if (pmu->irq < 0)
-		return pmu->irq;
-
-	ret = devm_request_irq(dev, pmu->irq, jh71xx_pmu_interrupt,
-			       0, pdev->name, pmu);
-	if (ret)
-		dev_err(dev, "failed to request irq\n");
+	spin_lock_init(&pmu->lock);
 
 	match_data = of_device_get_match_data(dev);
 	if (!match_data)
 		return -EINVAL;
 
+	if (match_data->pmu_parse_dt) {
+		ret = match_data->pmu_parse_dt(pdev, pmu);
+		if (ret) {
+			dev_err(dev, "failed to parse dt\n");
+			return ret;
+		}
+	}
+
 	pmu->genpd = devm_kcalloc(dev, match_data->num_domains,
 				  sizeof(struct generic_pm_domain *),
 				  GFP_KERNEL);
@@ -332,9 +358,6 @@ static int jh71xx_pmu_probe(struct platform_device *pdev)
 		}
 	}
 
-	spin_lock_init(&pmu->lock);
-	jh71xx_pmu_int_enable(pmu, JH71XX_PMU_INT_ALL_MASK & ~JH71XX_PMU_INT_PCH_FAIL, true);
-
 	ret = of_genpd_add_provider_onecell(np, &pmu->genpd_data);
 	if (ret) {
 		dev_err(dev, "failed to register genpd driver: %d\n", ret);
@@ -383,6 +406,7 @@ static const struct jh71xx_pmu_match_data jh7110_pmu = {
 	.num_domains = ARRAY_SIZE(jh7110_power_domains),
 	.domain_info = jh7110_power_domains,
 	.pmu_type = JH71XX_PMU_GENERAL,
+	.pmu_parse_dt = jh7110_pmu_general_parse_dt,
 };
 
 static const struct of_device_id jh71xx_pmu_of_match[] = {
-- 
2.25.1