linux-kernel - [PATCH 2/5] hwmon: (aquacomputer_d5next) Support writing multiple control values at once

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Date:   Sat, 11 Feb 2023 17:59:20 +0100
From:   Leonard Anderweit <leonard.anderweit@...il.com>
To:     linux-hwmon@...r.kernel.org
Cc:     Aleksa Savic <savicaleksa83@...il.com>,
        Jack Doan <me@...kdoan.com>, Jean Delvare <jdelvare@...e.com>,
        Guenter Roeck <linux@...ck-us.net>,
        Jonathan Corbet <corbet@....net>, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Leonard Anderweit <leonard.anderweit@...il.com>
Subject: [PATCH 2/5] hwmon: (aquacomputer_d5next) Support writing multiple control values at once

Add new function aqc_set_ctrl_vals() to support changing multiple control
values at once while sending only one control report.

Signed-off-by: Leonard Anderweit <leonard.anderweit@...il.com>
---
 drivers/hwmon/aquacomputer_d5next.c | 29 ++++++++++++++++++-----------
 1 file changed, 18 insertions(+), 11 deletions(-)

diff --git a/drivers/hwmon/aquacomputer_d5next.c b/drivers/hwmon/aquacomputer_d5next.c
index d69c2396854c..03ef9e0258d2 100644
--- a/drivers/hwmon/aquacomputer_d5next.c
+++ b/drivers/hwmon/aquacomputer_d5next.c
@@ -574,9 +574,9 @@ static int aqc_get_ctrl_val(struct aqc_data *priv, int offset, long *val, int ty
 	return ret;
 }
 
-static int aqc_set_ctrl_val(struct aqc_data *priv, int offset, long val, int type)
+static int aqc_set_ctrl_vals(struct aqc_data *priv, int *offsets, long *vals, int *types, int len)
 {
-	int ret;
+	int ret, i;
 
 	mutex_lock(&priv->mutex);
 
@@ -584,15 +584,17 @@ static int aqc_set_ctrl_val(struct aqc_data *priv, int offset, long val, int typ
 	if (ret < 0)
 		goto unlock_and_return;
 
-	switch (type) {
-	case AQC_BE16:
-		put_unaligned_be16((s16)val, priv->buffer + offset);
-		break;
-	case AQC_8:
-		priv->buffer[offset] = (u8)val;
-		break;
-	default:
-		ret = -EINVAL;
+	for (i = 0; i < len; i++) {
+		switch (types[i]) {
+		case AQC_BE16:
+			put_unaligned_be16((s16)vals[i], priv->buffer + offsets[i]);
+			break;
+		case AQC_8:
+			priv->buffer[offsets[i]] = (u8)vals[i];
+			break;
+		default:
+			ret = -EINVAL;
+		}
 	}
 	if (ret < 0)
 		goto unlock_and_return;
@@ -604,6 +606,11 @@ static int aqc_set_ctrl_val(struct aqc_data *priv, int offset, long val, int typ
 	return ret;
 }
 
+static int aqc_set_ctrl_val(struct aqc_data *priv, int offset, long val, int type)
+{
+	return aqc_set_ctrl_vals(priv, &offset, &val, &type, 1);
+}
+
 static umode_t aqc_is_visible(const void *data, enum hwmon_sensor_types type, u32 attr, int channel)
 {
 	const struct aqc_data *priv = data;
-- 
2.39.1