From:   Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
To:     andersson@kernel.org, lpieralisi@kernel.org, kw@linux.com,
        krzysztof.kozlowski+dt@linaro.org, robh@kernel.org
Cc:     konrad.dybcio@linaro.org, linux-arm-msm@vger.kernel.org,
        devicetree@vger.kernel.org, linux-pci@vger.kernel.org,
        linux-kernel@vger.kernel.org, quic_srichara@quicinc.com,
        Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Subject: [PATCH v5 08/19] PCI: qcom: Use bulk clock APIs for handling clocks for IP rev 1.0.0
Date:   Thu, 16 Mar 2023 13:41:06 +0530
Message-Id: <20230316081117.14288-9-manivannan.sadhasivam@linaro.org>
In-Reply-To: <20230316081117.14288-1-manivannan.sadhasivam@linaro.org>
References: <20230316081117.14288-1-manivannan.sadhasivam@linaro.org>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

All the clocks are enabled and disabled at the same time. So the bulk clock
APIs can be used to handle them together. This simplifies the code a lot.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
---
 drivers/pci/controller/dwc/pcie-qcom.c | 72 +++++++-------------------
 1 file changed, 19 insertions(+), 53 deletions(-)

diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index 10e792604042..14373d591ed1 100644
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -145,11 +145,9 @@
 
 #define QCOM_PCIE_CRC8_POLYNOMIAL		(BIT(2) | BIT(1) | BIT(0))
 
+#define QCOM_PCIE_1_0_0_MAX_CLOCKS		4
 struct qcom_pcie_resources_1_0_0 {
-	struct clk *iface;
-	struct clk *aux;
-	struct clk *master_bus;
-	struct clk *slave_bus;
+	struct clk_bulk_data clks[QCOM_PCIE_1_0_0_MAX_CLOCKS];
 	struct reset_control *core;
 	struct regulator *vdda;
 };
@@ -439,26 +437,20 @@ static int qcom_pcie_get_resources_1_0_0(struct qcom_pcie *pcie)
 	struct qcom_pcie_resources_1_0_0 *res = &pcie->res.v1_0_0;
 	struct dw_pcie *pci = pcie->pci;
 	struct device *dev = pci->dev;
+	int ret;
 
 	res->vdda = devm_regulator_get(dev, "vdda");
 	if (IS_ERR(res->vdda))
 		return PTR_ERR(res->vdda);
 
-	res->iface = devm_clk_get(dev, "iface");
-	if (IS_ERR(res->iface))
-		return PTR_ERR(res->iface);
-
-	res->aux = devm_clk_get(dev, "aux");
-	if (IS_ERR(res->aux))
-		return PTR_ERR(res->aux);
-
-	res->master_bus = devm_clk_get(dev, "master_bus");
-	if (IS_ERR(res->master_bus))
-		return PTR_ERR(res->master_bus);
+	res->clks[0].id = "iface";
+	res->clks[1].id = "aux";
+	res->clks[2].id = "master_bus";
+	res->clks[3].id = "slave_bus";
 
-	res->slave_bus = devm_clk_get(dev, "slave_bus");
-	if (IS_ERR(res->slave_bus))
-		return PTR_ERR(res->slave_bus);
+	ret = devm_clk_bulk_get(dev, ARRAY_SIZE(res->clks), res->clks);
+	if (ret < 0)
+		return ret;
 
 	res->core = devm_reset_control_get_exclusive(dev, "core");
 	return PTR_ERR_OR_ZERO(res->core);
@@ -469,10 +461,7 @@ static void qcom_pcie_deinit_1_0_0(struct qcom_pcie *pcie)
 	struct qcom_pcie_resources_1_0_0 *res = &pcie->res.v1_0_0;
 
 	reset_control_assert(res->core);
-	clk_disable_unprepare(res->slave_bus);
-	clk_disable_unprepare(res->master_bus);
-	clk_disable_unprepare(res->iface);
-	clk_disable_unprepare(res->aux);
+	clk_bulk_disable_unprepare(ARRAY_SIZE(res->clks), res->clks);
 	regulator_disable(res->vdda);
 }
 
@@ -489,46 +478,23 @@ static int qcom_pcie_init_1_0_0(struct qcom_pcie *pcie)
 		return ret;
 	}
 
-	ret = clk_prepare_enable(res->aux);
-	if (ret) {
-		dev_err(dev, "cannot prepare/enable aux clock\n");
-		goto err_res;
-	}
-
-	ret = clk_prepare_enable(res->iface);
-	if (ret) {
-		dev_err(dev, "cannot prepare/enable iface clock\n");
-		goto err_aux;
-	}
-
-	ret = clk_prepare_enable(res->master_bus);
-	if (ret) {
-		dev_err(dev, "cannot prepare/enable master_bus clock\n");
-		goto err_iface;
-	}
-
-	ret = clk_prepare_enable(res->slave_bus);
+	ret = clk_bulk_prepare_enable(ARRAY_SIZE(res->clks), res->clks);
 	if (ret) {
-		dev_err(dev, "cannot prepare/enable slave_bus clock\n");
-		goto err_master;
+		dev_err(dev, "cannot prepare/enable clocks\n");
+		goto err_assert_reset;
 	}
 
 	ret = regulator_enable(res->vdda);
 	if (ret) {
 		dev_err(dev, "cannot enable vdda regulator\n");
-		goto err_slave;
+		goto err_disable_clks;
 	}
 
 	return 0;
-err_slave:
-	clk_disable_unprepare(res->slave_bus);
-err_master:
-	clk_disable_unprepare(res->master_bus);
-err_iface:
-	clk_disable_unprepare(res->iface);
-err_aux:
-	clk_disable_unprepare(res->aux);
-err_res:
+
+err_disable_clks:
+	clk_bulk_disable_unprepare(ARRAY_SIZE(res->clks), res->clks);
+err_assert_reset:
 	reset_control_assert(res->core);
 
 	return ret;
-- 
2.25.1