linux-kernel - [PATCH v2 15/32] clk: at91: clk-h32mx: add support for parent

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Message-ID: <5e9bfd1ee862b83410cc6579e47cb291ee6aeaf7.1750182562.git.Ryan.Wanner@microchip.com>
Date: Tue, 24 Jun 2025 08:08:12 -0700
From: <Ryan.Wanner@...rochip.com>
To: <mturquette@...libre.com>, <sboyd@...nel.org>,
	<nicolas.ferre@...rochip.com>, <alexandre.belloni@...tlin.com>,
	<claudiu.beznea@...on.dev>
CC: <robh@...nel.org>, <linux-clk@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
	<varshini.rajendran@...rochip.com>
Subject: [PATCH v2 15/32] clk: at91: clk-h32mx: add support for parent_hw

From: Claudiu Beznea <claudiu.beznea@...on.dev>

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>
[ryan.wanner@...rochip.com: Remove SoC specific changes as they are
going to be coalesced into one SoC specific commit.]
Signed-off-by: Ryan Wanner <Ryan.Wanner@...rochip.com>
---
 drivers/clk/at91/clk-h32mx.c | 11 +++++++----
 drivers/clk/at91/dt-compat.c |  2 +-
 drivers/clk/at91/pmc.h       |  2 +-
 3 files changed, 9 insertions(+), 6 deletions(-)

diff --git a/drivers/clk/at91/clk-h32mx.c b/drivers/clk/at91/clk-h32mx.c
index 1e6c12eeda10..4b709f9bd831 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_parent_data *parent_data)
 {
 	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 +95,11 @@ 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_data)
+		init.parent_data = (const struct clk_parent_data *)parent_data;
+	else
+		init.parent_names = &parent_name;
+	init.num_parents = 1;
 	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 3285e3110b58..ccdeba3a1130 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 df2deb134a8d..fe42700df6db 100644
--- a/drivers/clk/at91/pmc.h
+++ b/drivers/clk/at91/pmc.h
@@ -177,7 +177,7 @@ 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_parent_data *parent_data);
 
 struct clk_hw * __init
 at91_clk_i2s_mux_register(struct regmap *regmap, const char *name,
-- 
2.43.0