linux-kernel - [PATCH 1/4] drivers/hwmon/pmbus: Switch status registers to 16 bit

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Date:   Wed,  9 Aug 2017 17:19:14 -0500
From:   Eddie James <eajames@...ux.vnet.ibm.com>
To:     linux@...ck-us.net
Cc:     jdelvare@...e.com, linux-hwmon@...r.kernel.org,
        linux-kernel@...r.kernel.org, joel@....id.au, jk@...abs.org,
        andrew@...id.au, cbostic@...ux.vnet.ibm.com,
        eajames@...ux.vnet.ibm.com, "Edward A. James" <eajames@...ibm.com>
Subject: [PATCH 1/4] drivers/hwmon/pmbus: Switch status registers to 16 bit

From: "Edward A. James" <eajames@...ibm.com>

Switch the storage of status registers to 16 bit values. This allows us
to store all the bits of STATUS_WORD.

Signed-off-by: Edward A. James <eajames@...ibm.com>
---
 drivers/hwmon/pmbus/pmbus_core.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/hwmon/pmbus/pmbus_core.c b/drivers/hwmon/pmbus/pmbus_core.c
index f1eff6b..4ec7586 100644
--- a/drivers/hwmon/pmbus/pmbus_core.c
+++ b/drivers/hwmon/pmbus/pmbus_core.c
@@ -112,7 +112,7 @@ struct pmbus_data {
 	 * A single status register covers multiple attributes,
 	 * so we keep them all together.
 	 */
-	u8 status[PB_NUM_STATUS_REG];
+	u16 status[PB_NUM_STATUS_REG];
 	u8 status_register;
 
 	u8 currpage;
@@ -716,10 +716,10 @@ static int pmbus_get_boolean(struct pmbus_data *data, struct pmbus_boolean *b,
 {
 	struct pmbus_sensor *s1 = b->s1;
 	struct pmbus_sensor *s2 = b->s2;
-	u16 reg = (index >> 8) & 0xffff;
-	u8 mask = index & 0xff;
+	u16 reg = (index >> 16) & 0xffff;
+	u16 mask = index & 0xffff;
 	int ret, status;
-	u8 regval;
+	u16 regval;
 
 	status = data->status[reg];
 	if (status < 0)
@@ -860,7 +860,7 @@ static int pmbus_add_boolean(struct pmbus_data *data,
 			     const char *name, const char *type, int seq,
 			     struct pmbus_sensor *s1,
 			     struct pmbus_sensor *s2,
-			     u16 reg, u8 mask)
+			     u16 reg, u16 mask)
 {
 	struct pmbus_boolean *boolean;
 	struct sensor_device_attribute *a;
@@ -876,7 +876,7 @@ static int pmbus_add_boolean(struct pmbus_data *data,
 	boolean->s1 = s1;
 	boolean->s2 = s2;
 	pmbus_attr_init(a, boolean->name, S_IRUGO, pmbus_show_boolean, NULL,
-			(reg << 8) | mask);
+			(reg << 16) | mask);
 
 	return pmbus_add_attribute(data, &a->dev_attr.attr);
 }
@@ -962,7 +962,7 @@ struct pmbus_limit_attr {
  */
 struct pmbus_sensor_attr {
 	u16 reg;			/* sensor register */
-	u8 gbit;			/* generic status bit */
+	u16 gbit;			/* generic status bit */
 	u8 nlimit;			/* # of limit registers */
 	enum pmbus_sensor_classes class;/* sensor class */
 	const char *label;		/* sensor label */
-- 
1.8.3.1