[PATCH 5/7] clk: spacemit: make clocks optional

From: Alex Elder <elder@riscstar.com>
To: p.zabel@pengutronix.de, mturquette@baylibre.com,
	sboyd@kernel.org, dlan@gentoo.org
Cc: robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org,
	heylenay@4d2.org, guodong@riscstar.com, paul.walmsley@sifive.com,
	palmer@dabbelt.com, aou@eecs.berkeley.edu,
	devicetree@vger.kernel.org, linux-clk@vger.kernel.org,
	linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: [PATCH 5/7] clk: spacemit: make clocks optional
Date: Thu, 20 Mar 2025 14:44:46 -0500	[thread overview]
Message-ID: <20250320194449.510569-6-elder@riscstar.com> (raw)
In-Reply-To: <20250320194449.510569-1-elder@riscstar.com>

There are some syscon devices that support both clocks and resets,
but for now only their reset functionality is required.  Make
defining clocks optional for a SpacemiT CCU, though at least one
clock or at least one reset controller must be defined.

Signed-off-by: Alex Elder <elder@riscstar.com>
---
 drivers/clk/spacemit/ccu-k1.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/clk/spacemit/ccu-k1.c b/drivers/clk/spacemit/ccu-k1.c
index be8abd27753cb..17e321c25959a 100644
--- a/drivers/clk/spacemit/ccu-k1.c
+++ b/drivers/clk/spacemit/ccu-k1.c
@@ -1830,6 +1830,10 @@ static int k1_ccu_register(struct device *dev, struct regmap *regmap,
 	const struct spacemit_ccu_clk *clk;
 	int i, ret, max_id = 0;
 
+	/* Clocks are optional */
+	if (!clks)
+		return 0;
+
 	for (clk = clks; clk->hw; clk++)
 		max_id = max(max_id, clk->id);
 
@@ -1903,7 +1907,7 @@ static int k1_ccu_probe(struct platform_device *pdev)
 	int ret;
 
 	data = of_device_get_match_data(dev);
-	if (!data)
+	if (!data || !(data->clk || data->rst_data))
 		return -EINVAL;
 
 	base_regmap = device_node_to_regmap(dev->of_node);
-- 
2.43.0

