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From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
	devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org
Cc: Andy Shevchenko <andy@kernel.org>,
	Geert Uytterhoeven <geert@linux-m68k.org>,
	Rob Herring <robh+dt@kernel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
	Conor Dooley <conor+dt@kernel.org>,
	Robin van der Gracht <robin@protonic.nl>,
	Paul Burton <paulburton@kernel.org>
Subject: [PATCH v2 13/15] auxdisplay: ht16k33: Use buffer from struct linedisp
Date: Mon, 12 Feb 2024 19:01:46 +0200
Message-ID: <20240212170423.2860895-14-andriy.shevchenko@linux.intel.com>
In-Reply-To: <20240212170423.2860895-1-andriy.shevchenko@linux.intel.com>
References: <20240212170423.2860895-1-andriy.shevchenko@linux.intel.com>
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struct linedips embedds a small buffer for the string that we may reuse.
Update the driver accordingly.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/auxdisplay/ht16k33.c | 28 +++++++++-------------------
 1 file changed, 9 insertions(+), 19 deletions(-)

diff --git a/drivers/auxdisplay/ht16k33.c b/drivers/auxdisplay/ht16k33.c
index b104f08252dd..08cc05b9d216 100644
--- a/drivers/auxdisplay/ht16k33.c
+++ b/drivers/auxdisplay/ht16k33.c
@@ -85,11 +85,6 @@ struct ht16k33_fbdev {
 	uint8_t *cache;
 };
 
-struct ht16k33_seg {
-	struct linedisp linedisp;
-	char curr[4];
-};
-
 struct ht16k33_priv {
 	struct i2c_client *client;
 	struct delayed_work work;
@@ -97,7 +92,7 @@ struct ht16k33_priv {
 	struct ht16k33_keypad keypad;
 	union {
 		struct ht16k33_fbdev fbdev;
-		struct ht16k33_seg seg;
+		struct linedisp linedisp;
 	};
 	enum display_type type;
 	uint8_t blink;
@@ -412,10 +407,9 @@ static void ht16k33_seg7_update(struct work_struct *work)
 {
 	struct ht16k33_priv *priv = container_of(work, struct ht16k33_priv,
 						 work.work);
-	struct ht16k33_seg *seg = &priv->seg;
-	struct linedisp *linedisp = &seg->linedisp;
+	struct linedisp *linedisp = &priv->linedisp;
 	struct linedisp_map *map = linedisp->map;
-	char *s = seg->curr;
+	char *s = linedisp->curr;
 	uint8_t buf[9];
 
 	buf[0] = map_to_seg7(&map->map.seg7, *s++);
@@ -435,10 +429,9 @@ static void ht16k33_seg14_update(struct work_struct *work)
 {
 	struct ht16k33_priv *priv = container_of(work, struct ht16k33_priv,
 						 work.work);
-	struct ht16k33_seg *seg = &priv->seg;
-	struct linedisp *linedisp = &seg->linedisp;
+	struct linedisp *linedisp = &priv->linedisp;
 	struct linedisp_map *map = linedisp->map;
-	char *s = seg->curr;
+	char *s = linedisp->curr;
 	uint8_t buf[8];
 
 	put_unaligned_le16(map_to_seg14(&map->map.seg14, *s++), buf + 0);
@@ -451,8 +444,7 @@ static void ht16k33_seg14_update(struct work_struct *work)
 
 static int ht16k33_linedisp_get_map_type(struct linedisp *linedisp)
 {
-	struct ht16k33_priv *priv = container_of(linedisp, struct ht16k33_priv,
-						 seg.linedisp);
+	struct ht16k33_priv *priv = container_of(linedisp, struct ht16k33_priv, linedisp);
 
 	switch (priv->type) {
 	case DISP_MATRIX:
@@ -471,8 +463,7 @@ static int ht16k33_linedisp_get_map_type(struct linedisp *linedisp)
 
 static void ht16k33_linedisp_update(struct linedisp *linedisp)
 {
-	struct ht16k33_priv *priv = container_of(linedisp, struct ht16k33_priv,
-						 seg.linedisp);
+	struct ht16k33_priv *priv = container_of(linedisp, struct ht16k33_priv, linedisp);
 
 	schedule_delayed_work(&priv->work, 0);
 }
@@ -663,14 +654,13 @@ static int ht16k33_fbdev_probe(struct device *dev, struct ht16k33_priv *priv,
 static int ht16k33_seg_probe(struct device *dev, struct ht16k33_priv *priv,
 			     uint32_t brightness)
 {
-	struct ht16k33_seg *seg = &priv->seg;
 	int err;
 
 	err = ht16k33_brightness_set(priv, brightness);
 	if (err)
 		return err;
 
-	return linedisp_register(&seg->linedisp, dev, 4, seg->curr, &ht16k33_linedisp_ops);
+	return linedisp_register(&priv->linedisp, dev, 4, NULL, &ht16k33_linedisp_ops);
 }
 
 static int ht16k33_probe(struct i2c_client *client)
@@ -754,7 +744,7 @@ static void ht16k33_remove(struct i2c_client *client)
 
 	case DISP_QUAD_7SEG:
 	case DISP_QUAD_14SEG:
-		linedisp_unregister(&priv->seg.linedisp);
+		linedisp_unregister(&priv->linedisp);
 		break;
 	}
 }
-- 
2.43.0.rc1.1.gbec44491f096