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Message-Id: <20250218-apple-codec-changes-v2-14-932760fd7e07@gmail.com>
Date: Tue, 18 Feb 2025 18:35:48 +1000
From: James Calligeros <jcalligeros99@...il.com>
To: Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>,
Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>,
Shenghao Ding <shenghao-ding@...com>, Kevin Lu <kevin-lu@...com>,
Baojun Xu <baojun.xu@...com>, Dan Murphy <dmurphy@...com>,
Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>, Shi Fu <shifu0704@...ndersoft.com>,
Jean Delvare <jdelvare@...e.com>, Guenter Roeck <linux@...ck-us.net>
Cc: Alyssa Rosenzweig <alyssa@...enzweig.io>,
Martin PoviĊĦer <povik+lin@...ebit.org>,
Hector Martin <marcan@...can.st>, linux-sound@...r.kernel.org,
linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
asahi@...ts.linux.dev, linux-hwmon@...r.kernel.org,
James Calligeros <jcalligeros99@...il.com>
Subject: [PATCH v2 14/29] ASoC: tas2770: expose die temp to hwmon
Create and register a hwmon device to export the die temperature
to the hwmon interface
Signed-off-by: James Calligeros <jcalligeros99@...il.com>
---
sound/soc/codecs/tas2770.c | 69 +++++++++++++++++++++++++
1 file changed, 69 insertions(+)
diff --git a/sound/soc/codecs/tas2770.c b/sound/soc/codecs/tas2770.c
index 84066884d36be8d41d83bca5680e9f683c420d78..fee99db904a5885d740c1cfe8ce2645a963c6e1d 100644
--- a/sound/soc/codecs/tas2770.c
+++ b/sound/soc/codecs/tas2770.c
@@ -12,6 +12,7 @@
#include <linux/err.h>
#include <linux/init.h>
#include <linux/delay.h>
+#include <linux/hwmon.h>
#include <linux/pm.h>
#include <linux/i2c.h>
#include <linux/gpio/consumer.h>
@@ -537,6 +538,61 @@ static struct attribute *tas2770_sysfs_attrs[] = {
};
ATTRIBUTE_GROUPS(tas2770_sysfs);
+#if defined(CONFIG_HWMON)
+static umode_t tas2770_hwmon_is_visible(const void *data,
+ enum hwmon_sensor_types type, u32 attr,
+ int channel)
+{
+ if (type != hwmon_temp)
+ return 0;
+
+ switch (attr) {
+ case hwmon_temp_input:
+ return 0444;
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+static int tas2770_hwmon_read(struct device *dev,
+ enum hwmon_sensor_types type,
+ u32 attr, int channel, long *val)
+{
+ struct tas2770_priv *tas2770 = i2c_get_clientdata(to_i2c_client(dev));
+ int ret;
+
+ switch (attr) {
+ case hwmon_temp_input:
+ ret = tas2770_read_die_temp(tas2770, (int *)val);
+ if (!ret)
+ *val *= 1000;
+ break;
+ default:
+ ret = -EOPNOTSUPP;
+ break;
+ }
+
+ return ret;
+}
+
+static const struct hwmon_channel_info *const tas2770_hwmon_info[] = {
+ HWMON_CHANNEL_INFO(temp, HWMON_T_INPUT),
+ NULL
+};
+
+static const struct hwmon_ops tas2770_hwmon_ops = {
+ .is_visible = tas2770_hwmon_is_visible,
+ .read = tas2770_hwmon_read,
+};
+
+static const struct hwmon_chip_info tas2770_hwmon_chip_info = {
+ .ops = &tas2770_hwmon_ops,
+ .info = tas2770_hwmon_info,
+};
+#endif
+
static const struct regmap_config tas2770_i2c_regmap;
static int tas2770_codec_probe(struct snd_soc_component *component)
@@ -768,6 +824,19 @@ static int tas2770_i2c_probe(struct i2c_client *client)
if (result)
dev_err(tas2770->dev, "Register codec failed.\n");
+ if (IS_REACHABLE(CONFIG_HWMON)) {
+ struct device *hwmon;
+
+ hwmon = devm_hwmon_device_register_with_info(&client->dev, "tas2770",
+ tas2770,
+ &tas2770_hwmon_chip_info,
+ NULL);
+ if (IS_ERR(hwmon)) {
+ return dev_err_probe(&client->dev, PTR_ERR(hwmon),
+ "Failed to register temp sensor\n");
+ }
+ }
+
return result;
}
--
2.48.1
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