linux-kernel - [PATCH 06/25] clk: fixed-factor: Add CLK_FIXED_FACTOR_HWS which takes list of struct clk

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Message-Id: <20190520080421.12575-7-wens@kernel.org>
Date:   Mon, 20 May 2019 16:04:02 +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 06/25] clk: fixed-factor: Add CLK_FIXED_FACTOR_HWS which takes list of struct clk_hw *

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.

Add a new macro, CLK_FIXED_FACTOR_HWS, that can take an array of pointers
to struct clk_hw, instead of a string, as its parent. Taking an array
instead of a direct pointer allows the reuse of the array for multiple
clks, rather than having one compound literal with the same contents
allocated for each clk declaration.

Signed-off-by: Chen-Yu Tsai <wens@...e.org>
---
 include/linux/clk-provider.h | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
index c7b10dd32c39..ac26aef874d1 100644
--- a/include/linux/clk-provider.h
+++ b/include/linux/clk-provider.h
@@ -991,6 +991,21 @@ extern struct of_device_id __clk_of_table;
 						 _flags),		\
 	}
 
+/*
+ * This macro allows the driver to reuse the _parent array for multiple
+ * fixed factor clk declarations.
+ */
+#define CLK_FIXED_FACTOR_HWS(_struct, _name, _parent,			\
+			     _div, _mult, _flags)			\
+	struct clk_fixed_factor _struct = {				\
+		.div		= _div,					\
+		.mult		= _mult,				\
+		.hw.init	= CLK_HW_INIT_HWS(_name,		\
+						  _parent,		\
+						  &clk_fixed_factor_ops, \
+						  _flags),	\
+	}
+
 #ifdef CONFIG_OF
 int of_clk_add_provider(struct device_node *np,
 			struct clk *(*clk_src_get)(struct of_phandle_args *args,
-- 
2.20.1