hwmon fixes for v6.3-rc3

- ltc2992, adm1266: Set missing can_sleep flag
 
 - tmp512/tmp513: Drop of_match_ptr for ID table to fix build with !CONFIG_OF
 
 - ucd90320: Fix back-to-back access problem
 
 - ina3221: Fix bad error return from probe function
 
 - xgene: Fix use-after-free bug in remove function
 
 - adt7475: Fix hysteresis register bit masks, and fix association
   of 'smoothing' attributes
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Merge tag 'hwmon-for-v6.3-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging

Pull hwmon fixes from Guenter Roeck:

 - ltc2992, adm1266: Set missing can_sleep flag

 - tmp512/tmp513: Drop of_match_ptr for ID table to fix build with
   !CONFIG_OF

 - ucd90320: Fix back-to-back access problem

 - ina3221: Fix bad error return from probe function

 - xgene: Fix use-after-free bug in remove function

 - adt7475: Fix hysteresis register bit masks, and fix association of
   'smoothing' attributes

* tag 'hwmon-for-v6.3-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
  hwmon: (ltc2992) Set `can_sleep` flag for GPIO chip
  hwmon: (adm1266) Set `can_sleep` flag for GPIO chip
  hwmon: tmp512: drop of_match_ptr for ID table
  hwmon: (ucd90320) Add minimum delay between bus accesses
  hwmon: (ina3221) return prober error code
  hwmon: (xgene) Fix use after free bug in xgene_hwmon_remove due to race condition
  hwmon: (adt7475) Fix masking of hysteresis registers
  hwmon: (adt7475) Display smoothing attributes in correct order

drivers/hwmon/adt7475.c

@@ -488,10 +488,10 @@ static ssize_t temp_store(struct device *dev, struct device_attribute *attr,
 		val = (temp - val) / 1000;
 
 		if (sattr->index != 1) {
-			data->temp[HYSTERSIS][sattr->index] &= 0xF0;
+			data->temp[HYSTERSIS][sattr->index] &= 0x0F;
 			data->temp[HYSTERSIS][sattr->index] |= (val & 0xF) << 4;
 		} else {
-			data->temp[HYSTERSIS][sattr->index] &= 0x0F;
+			data->temp[HYSTERSIS][sattr->index] &= 0xF0;
 			data->temp[HYSTERSIS][sattr->index] |= (val & 0xF);
 		}
 
@@ -556,11 +556,11 @@ static ssize_t temp_st_show(struct device *dev, struct device_attribute *attr,
 		val = data->enh_acoustics[0] & 0xf;
 		break;
 	case 1:
-		val = (data->enh_acoustics[1] >> 4) & 0xf;
+		val = data->enh_acoustics[1] & 0xf;
 		break;
 	case 2:
 	default:
-		val = data->enh_acoustics[1] & 0xf;
+		val = (data->enh_acoustics[1] >> 4) & 0xf;
 		break;
 	}
 

drivers/hwmon/ina3221.c

@@ -772,7 +772,7 @@ static int ina3221_probe_child_from_dt(struct device *dev,
 		return ret;
 	} else if (val > INA3221_CHANNEL3) {
 		dev_err(dev, "invalid reg %d of %pOFn\n", val, child);
-		return ret;
+		return -EINVAL;
 	}
 
 	input = &ina->inputs[val];

drivers/hwmon/ltc2992.c

@@ -323,6 +323,7 @@ static int ltc2992_config_gpio(struct ltc2992_state *st)
 	st->gc.label = name;
 	st->gc.parent = &st->client->dev;
 	st->gc.owner = THIS_MODULE;
+	st->gc.can_sleep = true;
 	st->gc.base = -1;
 	st->gc.names = st->gpio_names;
 	st->gc.ngpio = ARRAY_SIZE(st->gpio_names);

drivers/hwmon/pmbus/adm1266.c

@@ -301,6 +301,7 @@ static int adm1266_config_gpio(struct adm1266_data *data)
 	data->gc.label = name;
 	data->gc.parent = &data->client->dev;
 	data->gc.owner = THIS_MODULE;
+	data->gc.can_sleep = true;
 	data->gc.base = -1;
 	data->gc.names = data->gpio_names;
 	data->gc.ngpio = ARRAY_SIZE(data->gpio_names);

drivers/hwmon/pmbus/ucd9000.c

@@ -7,6 +7,7 @@
  */
 
 #include <linux/debugfs.h>
+#include <linux/delay.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/of_device.h>
@@ -16,6 +17,7 @@
 #include <linux/i2c.h>
 #include <linux/pmbus.h>
 #include <linux/gpio/driver.h>
+#include <linux/timekeeping.h>
 #include "pmbus.h"
 
 enum chips { ucd9000, ucd90120, ucd90124, ucd90160, ucd90320, ucd9090,
@@ -65,6 +67,7 @@ struct ucd9000_data {
 	struct gpio_chip gpio;
 #endif
 	struct dentry *debugfs;
+	ktime_t write_time;
 };
 #define to_ucd9000_data(_info) container_of(_info, struct ucd9000_data, info)
 
@@ -73,6 +76,73 @@ struct ucd9000_debugfs_entry {
 	u8 index;
 };
 
+/*
+ * It has been observed that the UCD90320 randomly fails register access when
+ * doing another access right on the back of a register write. To mitigate this
+ * make sure that there is a minimum delay between a write access and the
+ * following access. The 250us is based on experimental data. At a delay of
+ * 200us the issue seems to go away. Add a bit of extra margin to allow for
+ * system to system differences.
+ */
+#define UCD90320_WAIT_DELAY_US 250
+
+static inline void ucd90320_wait(const struct ucd9000_data *data)
+{
+	s64 delta = ktime_us_delta(ktime_get(), data->write_time);
+
+	if (delta < UCD90320_WAIT_DELAY_US)
+		udelay(UCD90320_WAIT_DELAY_US - delta);
+}
+
+static int ucd90320_read_word_data(struct i2c_client *client, int page,
+				   int phase, int reg)
+{
+	const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
+	struct ucd9000_data *data = to_ucd9000_data(info);
+
+	if (reg >= PMBUS_VIRT_BASE)
+		return -ENXIO;
+
+	ucd90320_wait(data);
+	return pmbus_read_word_data(client, page, phase, reg);
+}
+
+static int ucd90320_read_byte_data(struct i2c_client *client, int page, int reg)
+{
+	const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
+	struct ucd9000_data *data = to_ucd9000_data(info);
+
+	ucd90320_wait(data);
+	return pmbus_read_byte_data(client, page, reg);
+}
+
+static int ucd90320_write_word_data(struct i2c_client *client, int page,
+				    int reg, u16 word)
+{
+	const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
+	struct ucd9000_data *data = to_ucd9000_data(info);
+	int ret;
+
+	ucd90320_wait(data);
+	ret = pmbus_write_word_data(client, page, reg, word);
+	data->write_time = ktime_get();
+
+	return ret;
+}
+
+static int ucd90320_write_byte(struct i2c_client *client, int page, u8 value)
+{
+	const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
+	struct ucd9000_data *data = to_ucd9000_data(info);
+	int ret;
+
+	ucd90320_wait(data);
+	ret = pmbus_write_byte(client, page, value);
+	data->write_time = ktime_get();
+
+	return ret;
+}
+
 static int ucd9000_get_fan_config(struct i2c_client *client, int fan)
 {
 	int fan_config = 0;
@@ -598,6 +668,11 @@ static int ucd9000_probe(struct i2c_client *client)
 		info->read_byte_data = ucd9000_read_byte_data;
 		info->func[0] |= PMBUS_HAVE_FAN12 | PMBUS_HAVE_STATUS_FAN12
 		  | PMBUS_HAVE_FAN34 | PMBUS_HAVE_STATUS_FAN34;
+	} else if (mid->driver_data == ucd90320) {
+		info->read_byte_data = ucd90320_read_byte_data;
+		info->read_word_data = ucd90320_read_word_data;
+		info->write_byte = ucd90320_write_byte;
+		info->write_word_data = ucd90320_write_word_data;
 	}
 
 	ucd9000_probe_gpio(client, mid, data);

drivers/hwmon/tmp513.c

@@ -758,7 +758,7 @@ static int tmp51x_probe(struct i2c_client *client)
 static struct i2c_driver tmp51x_driver = {
 	.driver = {
 		.name	= "tmp51x",
-		.of_match_table = of_match_ptr(tmp51x_of_match),
+		.of_match_table = tmp51x_of_match,
 	},
 	.probe_new	= tmp51x_probe,
 	.id_table	= tmp51x_id,

drivers/hwmon/xgene-hwmon.c

@@ -761,6 +761,7 @@ static int xgene_hwmon_remove(struct platform_device *pdev)
 {
 	struct xgene_hwmon_dev *ctx = platform_get_drvdata(pdev);
 
+	cancel_work_sync(&ctx->workq);
 	hwmon_device_unregister(ctx->hwmon_dev);
 	kfifo_free(&ctx->async_msg_fifo);
 	if (acpi_disabled)