linux-kernel - [PATCH v1 2/3] spi: cadence-quadspi: Add clock configuration for StarFive JH7110 QSPI

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Message-ID: <20230526062529.46747-3-william.qiu@starfivetech.com>
Date:   Fri, 26 May 2023 14:25:28 +0800
From:   William Qiu <william.qiu@...rfivetech.com>
To:     <devicetree@...r.kernel.org>, <linux-spi@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-riscv@...ts.infradead.org>
CC:     Mark Brown <broonie@...nel.org>, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Emil Renner Berthing <kernel@...il.dk>,
        Ziv Xu <ziv.xu@...rfivetech.com>,
        William Qiu <william.qiu@...rfivetech.com>
Subject: [PATCH v1 2/3] spi: cadence-quadspi: Add clock configuration for StarFive JH7110 QSPI

Add QSPI clock operation in device probe.

Signed-off-by: William Qiu <william.qiu@...rfivetech.com>
Reviewed-by: Hal Feng <hal.feng@...rfivetech.com>
---
 drivers/spi/spi-cadence-quadspi.c | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/drivers/spi/spi-cadence-quadspi.c b/drivers/spi/spi-cadence-quadspi.c
index 6ddb2dfc0f00..c6430fb3a0a4 100644
--- a/drivers/spi/spi-cadence-quadspi.c
+++ b/drivers/spi/spi-cadence-quadspi.c
@@ -1624,6 +1624,7 @@ static int cqspi_setup_flash(struct cqspi_st *cqspi)
 static int cqspi_probe(struct platform_device *pdev)
 {
 	const struct cqspi_driver_platdata *ddata;
+	struct clk *qspi_ahb, *qspi_apb;
 	struct reset_control *rstc, *rstc_ocp, *rstc_ref;
 	struct device *dev = &pdev->dev;
 	struct spi_master *master;
@@ -1715,6 +1716,32 @@ static int cqspi_probe(struct platform_device *pdev)
 	}
 
 	if (of_device_is_compatible(pdev->dev.of_node, "starfive,jh7110-qspi")) {
+		qspi_ahb = devm_clk_get(dev, "qspi-ahb");
+		if (IS_ERR(qspi_ahb)) {
+			dev_err(dev, "Cannot claim QSPI_AHB clock.\n");
+			ret = PTR_ERR(qspi_ahb);
+			return ret;
+		}
+
+		ret = clk_prepare_enable(qspi_ahb);
+		if (ret) {
+			dev_err(dev, "Cannot enable QSPI AHB clock.\n");
+			goto probe_clk_failed;
+		}
+
+		qspi_apb = devm_clk_get(dev, "qspi-apb");
+		if (IS_ERR(qspi_apb)) {
+			dev_err(dev, "Cannot claim QSPI_APB clock.\n");
+			ret = PTR_ERR(qspi_apb);
+			return ret;
+		}
+
+		ret = clk_prepare_enable(qspi_apb);
+		if (ret) {
+			dev_err(dev, "Cannot enable QSPI APB clock.\n");
+			goto probe_clk_failed;
+		}
+
 		rstc_ref = devm_reset_control_get_optional_exclusive(dev, "rstc_ref");
 		if (IS_ERR(rstc_ref)) {
 			ret = PTR_ERR(rstc_ref);
-- 
2.34.1