linux-kernel - [PATCH 23/25] clk: sunxi-ng: gate: Add macros for referencing local clock parents

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Date:   Mon, 20 May 2019 16:04:19 +0800
From:   Chen-Yu Tsai <wens@...nel.org>
To:     Maxime Ripard <maxime.ripard@...tlin.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Michael Turquette <mturquette@...libre.com>
Cc:     Chen-Yu Tsai <wens@...e.org>, linux-arm-kernel@...ts.infradead.org,
        linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 23/25] clk: sunxi-ng: gate: Add macros for referencing local clock parents

From: Chen-Yu Tsai <wens@...e.org>

With the new clk parenting code, clk_init_data was expanded to include
.parent_hws, for clk drivers to directly reference parents by clk_hw,
and .parent_data, for clk drivers to specify parents using a combination
of device tree clock-names, pointers to struct clk_hw, device tree clocks,
and/or fallback global clock names.

Add four new macros:

  - SUNXI_CCU_GATE_HW, that can take a struct clk_hw pointer, instead
    of a string, as its parent.

  - SUNXI_CCU_GATE_FW that takes a string to match a clock-names entry
    in the device tree to specify the clock parent.

  - SUNXI_CCU_GATE_HWS that takes an array of struct clk_hw * as its
    parent. This allows the array to be shared with other clk
    declarations.

  - SUNXI_CCU_GATE_DATA that takes an array of struct clk_parent_data *
    as its parent. This allows the array to be shared with other clk
    declarations.

Signed-off-by: Chen-Yu Tsai <wens@...e.org>
---
 drivers/clk/sunxi-ng/ccu_gate.h | 53 +++++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)

diff --git a/drivers/clk/sunxi-ng/ccu_gate.h b/drivers/clk/sunxi-ng/ccu_gate.h
index 4466169bd2d7..613ddd03629e 100644
--- a/drivers/clk/sunxi-ng/ccu_gate.h
+++ b/drivers/clk/sunxi-ng/ccu_gate.h
@@ -36,6 +36,59 @@ struct ccu_gate {
 		}							\
 	}
 
+#define SUNXI_CCU_GATE_HW(_struct, _name, _parent, _reg, _gate, _flags)	\
+	struct ccu_gate _struct = {					\
+		.enable	= _gate,					\
+		.common	= {						\
+			.reg		= _reg,				\
+			.hw.init	= CLK_HW_INIT_HW(_name,		\
+							 _parent,	\
+							 &ccu_gate_ops,	\
+							 _flags),	\
+		}							\
+	}
+
+#define SUNXI_CCU_GATE_FW(_struct, _name, _parent, _reg, _gate, _flags)	\
+	struct ccu_gate _struct = {					\
+		.enable	= _gate,					\
+		.common	= {						\
+			.reg		= _reg,				\
+			.hw.init	= CLK_HW_INIT_FW_NAME(_name,	\
+							      _parent,	\
+							      &ccu_gate_ops, \
+							      _flags),	\
+		}							\
+	}
+
+/*
+ * The following two macros allow the re-use of the data structure
+ * holding the parent info.
+ */
+#define SUNXI_CCU_GATE_HWS(_struct, _name, _parent, _reg, _gate, _flags) \
+	struct ccu_gate _struct = {					\
+		.enable	= _gate,					\
+		.common	= {						\
+			.reg		= _reg,				\
+			.hw.init	= CLK_HW_INIT_HWS(_name,	\
+							  _parent,	\
+							  &ccu_gate_ops, \
+							  _flags),	\
+		}							\
+	}
+
+#define SUNXI_CCU_GATE_DATA(_struct, _name, _data, _reg, _gate, _flags)	\
+	struct ccu_gate _struct = {					\
+		.enable	= _gate,					\
+		.common	= {						\
+			.reg		= _reg,				\
+			.hw.init	=				\
+				CLK_HW_INIT_PARENTS_DATA(_name,		\
+							 _data,		\
+							 &ccu_gate_ops,	\
+							 _flags),	\
+		}							\
+	}
+
 static inline struct ccu_gate *hw_to_ccu_gate(struct clk_hw *hw)
 {
 	struct ccu_common *common = hw_to_ccu_common(hw);
-- 
2.20.1