linux-kernel - [PATCH v3 12/12] regmap-irq: Deprecate the not_fixed

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Date:   Sun,  3 Jul 2022 12:21:01 +0100
From:   Aidan MacDonald <aidanmacdonald.0x0@...il.com>
To:     broonie@...nel.org
Cc:     gregkh@...uxfoundation.org, rafael@...nel.org,
        andy.shevchenko@...il.com, krzk@...nel.org,
        m.szyprowski@...sung.com, mazziesaccount@...il.com,
        linux-kernel@...r.kernel.org, linux-samsung-soc@...r.kernel.org
Subject: [PATCH v3 12/12] regmap-irq: Deprecate the not_fixed_stride flag

This flag is a bit of a hack and the same thing can be accomplished
using a custom ->get_irq_reg() callback. Add a warning to catch any
use of the flag.

Signed-off-by: Aidan MacDonald <aidanmacdonald.0x0@...il.com>
---
 drivers/base/regmap/regmap-irq.c | 2 ++
 include/linux/regmap.h           | 6 ++++--
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/base/regmap/regmap-irq.c b/drivers/base/regmap/regmap-irq.c
index ec658755dd1b..4ef9488d05cd 100644
--- a/drivers/base/regmap/regmap-irq.c
+++ b/drivers/base/regmap/regmap-irq.c
@@ -739,6 +739,8 @@ int regmap_add_irq_chip_fwnode(struct fwnode_handle *fwnode,
 	}
 
 	if (chip->not_fixed_stride) {
+		dev_warn(map->dev, "not_fixed_stride is deprecated; use ->get_irq_reg() instead");
+
 		for (i = 0; i < chip->num_regs; i++)
 			if (chip->sub_reg_offsets[i].num_regs != 1)
 				return -EINVAL;
diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index ae5f1f7d4b5a..84ab1c32271f 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -1493,8 +1493,10 @@ struct regmap_irq_chip_data;
  *                   registers before unmasking interrupts to clear any bits
  *                   set when they were masked.
  * @not_fixed_stride: Used when chip peripherals are not laid out with fixed
- * 		      stride. Must be used with sub_reg_offsets containing the
- * 		      offsets to each peripheral.
+ *		      stride. Must be used with sub_reg_offsets containing the
+ *		      offsets to each peripheral. Deprecated; the same thing
+ *		      can be accomplished with a @get_irq_reg callback, without
+ *		      the need for a @sub_reg_offsets table.
  * @status_invert: Inverted status register: cleared bits are active interrupts.
  * @runtime_pm:  Hold a runtime PM lock on the device when accessing it.
  *
-- 
2.35.1