linux-kernel - [PATCH v2 08/10] regmap: Allow setting IRQ domain name suffix

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Message-ID: <dc2c1d972a5553ce13f8df5d82e65a5a8c099f0e.1716533790.git.mazziesaccount@gmail.com>
Date: Fri, 24 May 2024 11:19:13 +0300
From: Matti Vaittinen <mazziesaccount@...il.com>
To: Matti Vaittinen <matti.vaittinen@...rohmeurope.com>,
	Matti Vaittinen <mazziesaccount@...il.com>
Cc: Lee Jones <lee@...nel.org>, Mark Brown <broonie@...nel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	"Rafael J. Wysocki" <rafael@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>, linux-kernel@...r.kernel.org
Subject: [PATCH v2 08/10] regmap: Allow setting IRQ domain name suffix

When multiple IRQ domains are created from same device-tree node they
will get same name based on the device-tree path. This will cause a
naming collision in debugFS when IRQ domain specific entries are
created.

The regmap-IRQ creates per instance IRQ domains. This will lead to the
domain name conflict when a device which provides more than one physical
IRQ uses the regmap-IRQ.

Add support for specifying an IRQ domain name suffix when creating a
regmap-IRQ controller.

Signed-off-by: Matti Vaittinen <mazziesaccount@...il.com>
---
 drivers/base/regmap/regmap-irq.c | 13 ++++++++-----
 include/linux/regmap.h           |  4 ++++
 2 files changed, 12 insertions(+), 5 deletions(-)

diff --git a/drivers/base/regmap/regmap-irq.c b/drivers/base/regmap/regmap-irq.c
index 45fd13ef13fc..e86964a9843b 100644
--- a/drivers/base/regmap/regmap-irq.c
+++ b/drivers/base/regmap/regmap-irq.c
@@ -857,12 +857,15 @@ int regmap_add_irq_chip_fwnode(struct fwnode_handle *fwnode,
 	}
 
 	if (irq_base)
-		d->domain = irq_domain_create_legacy(fwnode, chip->num_irqs,
-						     irq_base, 0,
-						     &regmap_domain_ops, d);
+		d->domain = irq_domain_create_legacy_named(fwnode,
+						chip->num_irqs,	irq_base, 0,
+						&regmap_domain_ops, d,
+						chip->domain_suffix);
 	else
-		d->domain = irq_domain_create_linear(fwnode, chip->num_irqs,
-						     &regmap_domain_ops, d);
+		d->domain = irq_domain_create_linear_named(fwnode,
+						chip->num_irqs, &regmap_domain_ops,
+						d, chip->domain_suffix);
+
 	if (!d->domain) {
 		dev_err(map->dev, "Failed to create IRQ domain\n");
 		ret = -ENOMEM;
diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index b743241cfb7c..9df971986abb 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -1518,6 +1518,9 @@ struct regmap_irq_chip_data;
  * struct regmap_irq_chip - Description of a generic regmap irq_chip.
  *
  * @name:        Descriptive name for IRQ controller.
+ * @domain_suffix: Name suffix to be appended to end of IRQ domain name. Needed
+ *		   when multiple regmap-IRQ controllers are created from same
+ *		   device.
  *
  * @main_status: Base main status register address. For chips which have
  *		 interrupts arranged in separate sub-irq blocks with own IRQ
@@ -1603,6 +1606,7 @@ struct regmap_irq_chip_data;
  */
 struct regmap_irq_chip {
 	const char *name;
+	const char *domain_suffix;
 
 	unsigned int main_status;
 	unsigned int num_main_status_bits;
-- 
2.45.1


-- 
Matti Vaittinen, Linux device drivers
ROHM Semiconductors, Finland SWDC
Kiviharjunlenkki 1E
90220 OULU
FINLAND

~~~ "I don't think so," said Rene Descartes. Just then he vanished ~~~
Simon says - in Latin please.
~~~ "non cogito me" dixit Rene Descarte, deinde evanescavit ~~~
Thanks to Simon Glass for the translation =] 

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