linux-kernel - [PATCH v2 10/13] clk: composite: Add hw based registration APIs

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Message-Id: <1461277324-27185-11-git-send-email-sboyd@codeaurora.org>
Date:	Thu, 21 Apr 2016 15:22:01 -0700
From:	Stephen Boyd <sboyd@...eaurora.org>
To:	Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...eaurora.org>
Cc:	linux-kernel@...r.kernel.org, linux-clk@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Subject: [PATCH v2 10/13] clk: composite: Add hw based registration APIs

Add registration APIs in the clk composite code to return struct
clk_hw pointers instead of struct clk pointers. This way we hide
the struct clk pointer from providers unless they need to use
consumer facing APIs.

Signed-off-by: Stephen Boyd <sboyd@...eaurora.org>
---
 drivers/clk/clk-composite.c  | 45 ++++++++++++++++++++++++++++++++------------
 include/linux/clk-provider.h |  7 +++++++
 2 files changed, 40 insertions(+), 12 deletions(-)

diff --git a/drivers/clk/clk-composite.c b/drivers/clk/clk-composite.c
index 1f903e1f86a2..463fadd5a68f 100644
--- a/drivers/clk/clk-composite.c
+++ b/drivers/clk/clk-composite.c
@@ -184,17 +184,18 @@ static void clk_composite_disable(struct clk_hw *hw)
 	gate_ops->disable(gate_hw);
 }
 
-struct clk *clk_register_composite(struct device *dev, const char *name,
+struct clk_hw *clk_hw_register_composite(struct device *dev, const char *name,
 			const char * const *parent_names, int num_parents,
 			struct clk_hw *mux_hw, const struct clk_ops *mux_ops,
 			struct clk_hw *rate_hw, const struct clk_ops *rate_ops,
 			struct clk_hw *gate_hw, const struct clk_ops *gate_ops,
 			unsigned long flags)
 {
-	struct clk *clk;
+	struct clk_hw *hw;
 	struct clk_init_data init;
 	struct clk_composite *composite;
 	struct clk_ops *clk_composite_ops;
+	int ret;
 
 	composite = kzalloc(sizeof(*composite), GFP_KERNEL);
 	if (!composite)
@@ -204,12 +205,13 @@ struct clk *clk_register_composite(struct device *dev, const char *name,
 	init.flags = flags | CLK_IS_BASIC;
 	init.parent_names = parent_names;
 	init.num_parents = num_parents;
+	hw = &composite->hw;
 
 	clk_composite_ops = &composite->ops;
 
 	if (mux_hw && mux_ops) {
 		if (!mux_ops->get_parent) {
-			clk = ERR_PTR(-EINVAL);
+			hw = ERR_PTR(-EINVAL);
 			goto err;
 		}
 
@@ -224,7 +226,7 @@ struct clk *clk_register_composite(struct device *dev, const char *name,
 
 	if (rate_hw && rate_ops) {
 		if (!rate_ops->recalc_rate) {
-			clk = ERR_PTR(-EINVAL);
+			hw = ERR_PTR(-EINVAL);
 			goto err;
 		}
 		clk_composite_ops->recalc_rate = clk_composite_recalc_rate;
@@ -253,7 +255,7 @@ struct clk *clk_register_composite(struct device *dev, const char *name,
 	if (gate_hw && gate_ops) {
 		if (!gate_ops->is_enabled || !gate_ops->enable ||
 		    !gate_ops->disable) {
-			clk = ERR_PTR(-EINVAL);
+			hw = ERR_PTR(-EINVAL);
 			goto err;
 		}
 
@@ -267,22 +269,41 @@ struct clk *clk_register_composite(struct device *dev, const char *name,
 	init.ops = clk_composite_ops;
 	composite->hw.init = &init;
 
-	clk = clk_register(dev, &composite->hw);
-	if (IS_ERR(clk))
+	ret = clk_hw_register(dev, hw);
+	if (ret) {
+		hw = ERR_PTR(ret);
 		goto err;
+	}
 
 	if (composite->mux_hw)
-		composite->mux_hw->clk = clk;
+		composite->mux_hw->clk = hw->clk;
 
 	if (composite->rate_hw)
-		composite->rate_hw->clk = clk;
+		composite->rate_hw->clk = hw->clk;
 
 	if (composite->gate_hw)
-		composite->gate_hw->clk = clk;
+		composite->gate_hw->clk = hw->clk;
 
-	return clk;
+	return hw;
 
 err:
 	kfree(composite);
-	return clk;
+	return hw;
+}
+
+struct clk *clk_register_composite(struct device *dev, const char *name,
+			const char * const *parent_names, int num_parents,
+			struct clk_hw *mux_hw, const struct clk_ops *mux_ops,
+			struct clk_hw *rate_hw, const struct clk_ops *rate_ops,
+			struct clk_hw *gate_hw, const struct clk_ops *gate_ops,
+			unsigned long flags)
+{
+	struct clk_hw *hw;
+
+	hw = clk_hw_register_composite(dev, name, parent_names, num_parents,
+			mux_hw, mux_ops, rate_hw, rate_ops, gate_hw, gate_ops,
+			flags);
+	if (IS_ERR(hw))
+		return ERR_CAST(hw);
+	return hw->clk;
 }
diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
index bcbaf6c95d52..456c3ced1ac9 100644
--- a/include/linux/clk-provider.h
+++ b/include/linux/clk-provider.h
@@ -638,6 +638,13 @@ struct clk *clk_register_composite(struct device *dev, const char *name,
 		struct clk_hw *rate_hw, const struct clk_ops *rate_ops,
 		struct clk_hw *gate_hw, const struct clk_ops *gate_ops,
 		unsigned long flags);
+struct clk_hw *clk_hw_register_composite(struct device *dev, const char *name,
+		const char * const *parent_names, int num_parents,
+		struct clk_hw *mux_hw, const struct clk_ops *mux_ops,
+		struct clk_hw *rate_hw, const struct clk_ops *rate_ops,
+		struct clk_hw *gate_hw, const struct clk_ops *gate_ops,
+		unsigned long flags);
+void clk_hw_unregister_composite(struct clk_hw *hw);
 
 /***
  * struct clk_gpio_gate - gpio gated clock
-- 
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