linux-kernel - [PATCH 08/42] clk: at91: clk-h32mx: add support for parent

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Message-Id: <20230727053156.13587-9-claudiu.beznea@tuxon.dev>
Date:   Thu, 27 Jul 2023 08:31:22 +0300
From:   Claudiu Beznea <claudiu.beznea@...on.dev>
To:     mturquette@...libre.com, sboyd@...nel.org,
        nicolas.ferre@...rochip.com, alexandre.belloni@...tlin.com,
        mripard@...nel.org
Cc:     linux-clk@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, varshini.rajendran@...rochip.com,
        Claudiu Beznea <claudiu.beznea@...on.dev>
Subject: [PATCH 08/42] clk: at91: clk-h32mx: add support for parent_hw

Add support for parent_hw in h32mx clock driver.
With this parent-child relation is described with pointers rather
than strings making registration a bit faster.

All the SoC based drivers that rely on clk-h32mx were adapted
to the new API change. The switch itself for SoCs will be done
in subsequent patches.

Signed-off-by: Claudiu Beznea <claudiu.beznea@...on.dev>
---
 drivers/clk/at91/clk-h32mx.c | 13 +++++++++----
 drivers/clk/at91/dt-compat.c |  2 +-
 drivers/clk/at91/pmc.h       |  2 +-
 drivers/clk/at91/sama5d2.c   |  2 +-
 drivers/clk/at91/sama5d4.c   |  2 +-
 5 files changed, 13 insertions(+), 8 deletions(-)

diff --git a/drivers/clk/at91/clk-h32mx.c b/drivers/clk/at91/clk-h32mx.c
index 1e6c12eeda10..d7cdade56454 100644
--- a/drivers/clk/at91/clk-h32mx.c
+++ b/drivers/clk/at91/clk-h32mx.c
@@ -83,10 +83,10 @@ static const struct clk_ops h32mx_ops = {
 
 struct clk_hw * __init
 at91_clk_register_h32mx(struct regmap *regmap, const char *name,
-			const char *parent_name)
+			const char *parent_name, struct clk_hw *parent_hw)
 {
 	struct clk_sama5d4_h32mx *h32mxclk;
-	struct clk_init_data init;
+	struct clk_init_data init = {};
 	int ret;
 
 	h32mxclk = kzalloc(sizeof(*h32mxclk), GFP_KERNEL);
@@ -95,8 +95,13 @@ at91_clk_register_h32mx(struct regmap *regmap, const char *name,
 
 	init.name = name;
 	init.ops = &h32mx_ops;
-	init.parent_names = parent_name ? &parent_name : NULL;
-	init.num_parents = parent_name ? 1 : 0;
+	if (parent_hw) {
+		init.parent_hws = (const struct clk_hw **)&parent_hw;
+		init.num_parents = 1;
+	} else {
+		init.parent_names = parent_name ? &parent_name : NULL;
+		init.num_parents = parent_name ? 1 : 0;
+	}
 	init.flags = CLK_SET_RATE_GATE;
 
 	h32mxclk->hw.init = &init;
diff --git a/drivers/clk/at91/dt-compat.c b/drivers/clk/at91/dt-compat.c
index 6e010b5cb435..8540234e9d89 100644
--- a/drivers/clk/at91/dt-compat.c
+++ b/drivers/clk/at91/dt-compat.c
@@ -201,7 +201,7 @@ static void __init of_sama5d4_clk_h32mx_setup(struct device_node *np)
 
 	parent_name = of_clk_get_parent_name(np, 0);
 
-	hw = at91_clk_register_h32mx(regmap, name, parent_name);
+	hw = at91_clk_register_h32mx(regmap, name, parent_name, NULL);
 	if (IS_ERR(hw))
 		return;
 
diff --git a/drivers/clk/at91/pmc.h b/drivers/clk/at91/pmc.h
index 3f7ad79db4db..1604b44f2945 100644
--- a/drivers/clk/at91/pmc.h
+++ b/drivers/clk/at91/pmc.h
@@ -150,7 +150,7 @@ at91_clk_register_generated(struct regmap *regmap, spinlock_t *lock,
 
 struct clk_hw * __init
 at91_clk_register_h32mx(struct regmap *regmap, const char *name,
-			const char *parent_name);
+			const char *parent_name, struct clk_hw *parent_hw);
 
 struct clk_hw * __init
 at91_clk_i2s_mux_register(struct regmap *regmap, const char *name,
diff --git a/drivers/clk/at91/sama5d2.c b/drivers/clk/at91/sama5d2.c
index 7904f2122ed7..8c7ff0108b41 100644
--- a/drivers/clk/at91/sama5d2.c
+++ b/drivers/clk/at91/sama5d2.c
@@ -276,7 +276,7 @@ static void __init sama5d2_pmc_setup(struct device_node *np)
 
 	sama5d2_pmc->chws[PMC_MCK] = hw;
 
-	hw = at91_clk_register_h32mx(regmap, "h32mxck", "masterck_div");
+	hw = at91_clk_register_h32mx(regmap, "h32mxck", "masterck_div", NULL);
 	if (IS_ERR(hw))
 		goto err_free;
 
diff --git a/drivers/clk/at91/sama5d4.c b/drivers/clk/at91/sama5d4.c
index 7cda8032653e..04c848cd7001 100644
--- a/drivers/clk/at91/sama5d4.c
+++ b/drivers/clk/at91/sama5d4.c
@@ -214,7 +214,7 @@ static void __init sama5d4_pmc_setup(struct device_node *np)
 
 	sama5d4_pmc->chws[PMC_MCK] = hw;
 
-	hw = at91_clk_register_h32mx(regmap, "h32mxck", "masterck_div");
+	hw = at91_clk_register_h32mx(regmap, "h32mxck", "masterck_div", NULL);
 	if (IS_ERR(hw))
 		goto err_free;
 
-- 
2.39.2