linux-kernel - [PATCH 2/5] clk: vc5: use a dedicated struct to describe the output drivers

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Date:   Thu,  2 Jul 2020 23:28:33 +0200
From:   Luca Ceresoli <luca@...aceresoli.net>
To:     linux-clk@...r.kernel.org
Cc:     Luca Ceresoli <luca@...aceresoli.net>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, Marek Vasut <marek.vasut@...il.com>
Subject: [PATCH 2/5] clk: vc5: use a dedicated struct to describe the output drivers

Reusing the generic struct vc5_hw_data for all blocks is handy. However
it implies we allocate space the div_int and div_frc fields even for
the output drivers where they are unused. Moreover a follow-up commit
will add a new field needed only for output drivers, thus the memory
waste would increase.

Use a dedicated struct for the output drivers so that each block uses
exactly the fields it needs, not more.

Signed-off-by: Luca Ceresoli <luca@...aceresoli.net>
---
 drivers/clk/clk-versaclock5.c | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

diff --git a/drivers/clk/clk-versaclock5.c b/drivers/clk/clk-versaclock5.c
index fa96659f8023..60c7cf9acde3 100644
--- a/drivers/clk/clk-versaclock5.c
+++ b/drivers/clk/clk-versaclock5.c
@@ -145,6 +145,12 @@ struct vc5_hw_data {
 	unsigned int		num;
 };
 
+struct vc5_out_data {
+	struct clk_hw		hw;
+	struct vc5_driver_data	*vc5;
+	unsigned int		num;
+};
+
 struct vc5_driver_data {
 	struct i2c_client	*client;
 	struct regmap		*regmap;
@@ -158,7 +164,7 @@ struct vc5_driver_data {
 	struct clk_hw		clk_pfd;
 	struct vc5_hw_data	clk_pll;
 	struct vc5_hw_data	clk_fod[VC5_MAX_FOD_NUM];
-	struct vc5_hw_data	clk_out[VC5_MAX_CLK_OUT_NUM];
+	struct vc5_out_data	clk_out[VC5_MAX_CLK_OUT_NUM];
 };
 
 static const char * const vc5_mux_names[] = {
@@ -565,7 +571,7 @@ static const struct clk_ops vc5_fod_ops = {
 
 static int vc5_clk_out_prepare(struct clk_hw *hw)
 {
-	struct vc5_hw_data *hwdata = container_of(hw, struct vc5_hw_data, hw);
+	struct vc5_out_data *hwdata = container_of(hw, struct vc5_out_data, hw);
 	struct vc5_driver_data *vc5 = hwdata->vc5;
 	const u8 mask = VC5_OUT_DIV_CONTROL_SELB_NORM |
 			VC5_OUT_DIV_CONTROL_SEL_EXT |
@@ -596,7 +602,7 @@ static int vc5_clk_out_prepare(struct clk_hw *hw)
 
 static void vc5_clk_out_unprepare(struct clk_hw *hw)
 {
-	struct vc5_hw_data *hwdata = container_of(hw, struct vc5_hw_data, hw);
+	struct vc5_out_data *hwdata = container_of(hw, struct vc5_out_data, hw);
 	struct vc5_driver_data *vc5 = hwdata->vc5;
 
 	/* Disable the clock buffer */
@@ -606,7 +612,7 @@ static void vc5_clk_out_unprepare(struct clk_hw *hw)
 
 static unsigned char vc5_clk_out_get_parent(struct clk_hw *hw)
 {
-	struct vc5_hw_data *hwdata = container_of(hw, struct vc5_hw_data, hw);
+	struct vc5_out_data *hwdata = container_of(hw, struct vc5_out_data, hw);
 	struct vc5_driver_data *vc5 = hwdata->vc5;
 	const u8 mask = VC5_OUT_DIV_CONTROL_SELB_NORM |
 			VC5_OUT_DIV_CONTROL_SEL_EXT |
@@ -636,7 +642,7 @@ static unsigned char vc5_clk_out_get_parent(struct clk_hw *hw)
 
 static int vc5_clk_out_set_parent(struct clk_hw *hw, u8 index)
 {
-	struct vc5_hw_data *hwdata = container_of(hw, struct vc5_hw_data, hw);
+	struct vc5_out_data *hwdata = container_of(hw, struct vc5_out_data, hw);
 	struct vc5_driver_data *vc5 = hwdata->vc5;
 	const u8 mask = VC5_OUT_DIV_CONTROL_RESET |
 			VC5_OUT_DIV_CONTROL_SELB_NORM |
-- 
2.27.0