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[73.228.159.35]) by smtp.gmail.com with ESMTPSA id 8926c6da1cb9f-4f505cf8e91sm420735173.6.2025.04.09.14.17.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 09 Apr 2025 14:17:51 -0700 (PDT) From: Alex Elder To: mturquette@baylibre.com, sboyd@kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org Cc: p.zabel@pengutronix.de, dlan@gentoo.org, heylenay@4d2.org, guodong@riscstar.com, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, spacemit@lists.linux.dev, devicetree@vger.kernel.org, linux-clk@vger.kernel.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 5/7] clk: spacemit: make clocks optional Date: Wed, 9 Apr 2025 16:17:38 -0500 Message-ID: <20250409211741.1171584-6-elder@riscstar.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20250409211741.1171584-1-elder@riscstar.com> References: <20250409211741.1171584-1-elder@riscstar.com> Precedence: bulk X-Mailing-List: spacemit@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 --- drivers/clk/spacemit/ccu-k1.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/clk/spacemit/ccu-k1.c b/drivers/clk/spacemit/ccu-k1.c index 7715cd38434f7..201ffefa5fa9f 100644 --- a/drivers/clk/spacemit/ccu-k1.c +++ b/drivers/clk/spacemit/ccu-k1.c @@ -1369,12 +1369,17 @@ static const struct reset_control_ops spacemit_reset_control_ops = { }; static int spacemit_ccu_register(struct device *dev, - struct regmap *regmap, struct regmap *lock_regmap, + struct regmap *regmap, + struct regmap *lock_regmap, const struct spacemit_ccu_data *data) { struct clk_hw_onecell_data *clk_data; int i, ret; + /* Clocks are optional */ + if (!data->clk_hws) + return 0; + clk_data = devm_kzalloc(dev, struct_size(clk_data, hws, data->clk_num), GFP_KERNEL); if (!clk_data) @@ -1486,6 +1491,7 @@ static int k1_ccu_probe(struct platform_device *pdev) return 0; } +/* Match data is required; its clk_hws or reset_data field must be non-null */ static const struct of_device_id of_k1_ccu_match[] = { { .compatible = "spacemit,k1-pll", -- 2.45.2