Thread (14 messages) 14 messages, 4 authors, 2023-02-08

Re: [PATCH 5/6] clk: samsung: Extract parent clock enabling to common function

From: Krzysztof Kozlowski <hidden>
Date: 2023-02-03 09:14:35
Also in: linux-clk, linux-samsung-soc, lkml

On 03/02/2023 07:09, Sam Protsenko wrote:
quoted hunk ↗ jump to hunk
Extract parent clock enabling from exynos_arm64_register_cmu() to
dedicated function. No functional change.

No functional change.

Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>
---
 drivers/clk/samsung/clk-exynos-arm64.c | 53 +++++++++++++++++---------
 1 file changed, 36 insertions(+), 17 deletions(-)
diff --git a/drivers/clk/samsung/clk-exynos-arm64.c b/drivers/clk/samsung/clk-exynos-arm64.c
index b921b9a1134a..361663223a24 100644
--- a/drivers/clk/samsung/clk-exynos-arm64.c
+++ b/drivers/clk/samsung/clk-exynos-arm64.c
@@ -56,6 +56,41 @@ static void __init exynos_arm64_init_clocks(struct device_node *np,
 	iounmap(reg_base);
 }
 
+/**
+ * exynos_arm64_enable_bus_clk - Enable parent clock of specified CMU
+ *
+ * @dev:	Device object; may be NULL if this function is not being
+ *		called from platform driver probe function
+ * @np:		CMU device tree node
+ * @cmu:	CMU data
+ *
+ * Keep CMU parent clock running (needed for CMU registers access).
+ *
+ * Return: 0 on success or negative error code on failure.
+ */
+static int __init exynos_arm64_enable_bus_clk(struct device *dev,
+		struct device_node *np, const struct samsung_cmu_info *cmu)
Align the arguments.
+{
+	struct clk *parent_clk;
+
+	if (!cmu->clk_name)
+		return 0;
+
+	if (dev)
+		parent_clk = clk_get(dev, cmu->clk_name);
+	else
+		parent_clk = of_clk_get_by_name(np, cmu->clk_name);
+
+	if (IS_ERR(parent_clk)) {
+		pr_err("%s: could not find bus clock %s; err = %ld\n",
+		       __func__, cmu->clk_name, PTR_ERR(parent_clk));
+		return PTR_ERR(parent_clk);
+	}
+
+	clk_prepare_enable(parent_clk);
+	return 0;
You do not check the return value in exynos_arm64_register_cmu() below,
so either make it a void or add the check.


Best regards,
Krzysztof


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