linux-kernel - [PATCH v3 20/32] clk: at91: clk-slow: add support for parent

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Message-ID: <1450fe7c64df3fb1b3123633c5edce6708a5a5d6.1752176711.git.Ryan.Wanner@microchip.com>
Date: Thu, 10 Jul 2025 13:07:13 -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: <varshini.rajendran@...rochip.com>, <linux-clk@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
	<robh@...nel.org>
Subject: [PATCH v3 20/32] clk: at91: clk-slow: add support for parent_hw

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

Add support for parent_hw in slow clock drivers. 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-slow 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>
Signed-off-by: Ryan Wanner <Ryan.Wanner@...rochip.com>
---
 drivers/clk/at91/at91sam9260.c | 2 +-
 drivers/clk/at91/clk-slow.c    | 8 ++++++--
 drivers/clk/at91/dt-compat.c   | 2 +-
 drivers/clk/at91/pmc.h         | 1 +
 4 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/clk/at91/at91sam9260.c b/drivers/clk/at91/at91sam9260.c
index f39deb3ec00a..55350331b07e 100644
--- a/drivers/clk/at91/at91sam9260.c
+++ b/drivers/clk/at91/at91sam9260.c
@@ -385,7 +385,7 @@ static void __init at91sam926x_pmc_setup(struct device_node *np,
 		parent_names[0] = "slow_rc_osc";
 		parent_names[1] = "slow_xtal";
 		hw = at91_clk_register_sam9260_slow(regmap, "slck",
-						    parent_names, 2);
+						    parent_names, NULL, 2);
 		if (IS_ERR(hw))
 			goto err_free;
 
diff --git a/drivers/clk/at91/clk-slow.c b/drivers/clk/at91/clk-slow.c
index ac9f7a48b76e..5b7fc6210e09 100644
--- a/drivers/clk/at91/clk-slow.c
+++ b/drivers/clk/at91/clk-slow.c
@@ -39,11 +39,12 @@ struct clk_hw * __init
 at91_clk_register_sam9260_slow(struct regmap *regmap,
 			       const char *name,
 			       const char **parent_names,
+			       struct clk_parent_data *parent_data,
 			       int num_parents)
 {
 	struct clk_sam9260_slow *slowck;
 	struct clk_hw *hw;
-	struct clk_init_data init;
+	struct clk_init_data init = {};
 	int ret;
 
 	if (!name)
@@ -58,7 +59,10 @@ at91_clk_register_sam9260_slow(struct regmap *regmap,
 
 	init.name = name;
 	init.ops = &sam9260_slow_ops;
-	init.parent_names = parent_names;
+	if (parent_data)
+		init.parent_data = (const struct clk_parent_data *)&parent_data;
+	else
+		init.parent_names = parent_names;
 	init.num_parents = num_parents;
 	init.flags = 0;
 
diff --git a/drivers/clk/at91/dt-compat.c b/drivers/clk/at91/dt-compat.c
index 5afd7c9f53fd..fa8658d3be7b 100644
--- a/drivers/clk/at91/dt-compat.c
+++ b/drivers/clk/at91/dt-compat.c
@@ -823,7 +823,7 @@ static void __init of_at91sam9260_clk_slow_setup(struct device_node *np)
 
 	of_property_read_string(np, "clock-output-names", &name);
 
-	hw = at91_clk_register_sam9260_slow(regmap, name, parent_names,
+	hw = at91_clk_register_sam9260_slow(regmap, name, parent_names, NULL,
 					    num_parents);
 	if (IS_ERR(hw))
 		return;
diff --git a/drivers/clk/at91/pmc.h b/drivers/clk/at91/pmc.h
index e5ab2fb3bc89..24c32e42f264 100644
--- a/drivers/clk/at91/pmc.h
+++ b/drivers/clk/at91/pmc.h
@@ -273,6 +273,7 @@ struct clk_hw * __init
 at91_clk_register_sam9260_slow(struct regmap *regmap,
 			       const char *name,
 			       const char **parent_names,
+			       struct clk_parent_data *parent_data,
 			       int num_parents);
 
 struct clk_hw * __init
-- 
2.43.0