linux-kernel - [PATCH] hwmon: Add basic support for lm64 to lm63.c

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Message-Id: <1268855722-18457-1-git-send-email-mjg@redhat.com>
Date:	Wed, 17 Mar 2010 15:55:22 -0400
From:	Matthew Garrett <mjg@...hat.com>
To:	lm-sensors@...sensors.org
Cc:	linux-kernel@...r.kernel.org, Matthew Garrett <mjg@...hat.com>
Subject: [PATCH] hwmon: Add basic support for lm64 to lm63.c

The lm64 appears to be an lm63 with added gpio lines. Add support for the
hwmon functionality - gpio can be added at some later stage if someone
has a need for them.

Signed-off-by: Matthew Garrett <mjg@...hat.com>
---
 Documentation/hwmon/lm63 |    7 +++++++
 drivers/hwmon/lm63.c     |   19 +++++++++++++++----
 2 files changed, 22 insertions(+), 4 deletions(-)

diff --git a/Documentation/hwmon/lm63 b/Documentation/hwmon/lm63
index 31660bf..b6f0495 100644
--- a/Documentation/hwmon/lm63
+++ b/Documentation/hwmon/lm63
@@ -7,6 +7,11 @@ Supported chips:
     Addresses scanned: I2C 0x4c
     Datasheet: Publicly available at the National Semiconductor website
                http://www.national.com/pf/LM/LM63.html
+  * National Semiconductor LM64
+    Prefix: 'lm64'
+    Addresses scanned: I2C 0x18 and 0x4e
+    Datasheet: Publicly available at the National Semiconductor website
+               http://www.national.com/pf/LM/LM64.html
 
 Author: Jean Delvare <khali@...ux-fr.org>
 
@@ -55,3 +60,5 @@ The lm63 driver will not update its values more frequently than every
 second; reading them more often will do no harm, but will return 'old'
 values.
 
+The lm64 is effectively an lm63 with gpio lines. The driver does not
+support these gpio lines at present.
\ No newline at end of file
diff --git a/drivers/hwmon/lm63.c b/drivers/hwmon/lm63.c
index bf81aff..01b23ef 100644
--- a/drivers/hwmon/lm63.c
+++ b/drivers/hwmon/lm63.c
@@ -53,7 +53,7 @@
  * Address is fully defined internally and cannot be changed.
  */
 
-static const unsigned short normal_i2c[] = { 0x4c, I2C_CLIENT_END };
+static const unsigned short normal_i2c[] = { 0x18, 0x4c, 0x4e, I2C_CLIENT_END };
 
 /*
  * The LM63 registers
@@ -131,12 +131,15 @@ static struct lm63_data *lm63_update_device(struct device *dev);
 static int lm63_detect(struct i2c_client *client, struct i2c_board_info *info);
 static void lm63_init_client(struct i2c_client *client);
 
+enum chips { lm63, lm64 };
+
 /*
  * Driver data (common to all clients)
  */
 
 static const struct i2c_device_id lm63_id[] = {
-	{ "lm63", 0 },
+	{ "lm63", lm63 },
+	{ "lm64", lm64 },
 	{ }
 };
 MODULE_DEVICE_TABLE(i2c, lm63_id);
@@ -177,6 +180,7 @@ struct lm63_data {
 			   2: remote high limit */
 	u8 temp2_crit_hyst;
 	u8 alarms;
+	int kind;
 };
 
 /*
@@ -422,6 +426,7 @@ static int lm63_detect(struct i2c_client *new_client,
 	struct i2c_adapter *adapter = new_client->adapter;
 	u8 man_id, chip_id, reg_config1, reg_config2;
 	u8 reg_alert_status, reg_alert_mask;
+	int address = new_client->addr;
 
 	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 		return -ENODEV;
@@ -439,7 +444,6 @@ static int lm63_detect(struct i2c_client *new_client,
 			 LM63_REG_ALERT_MASK);
 
 	if (man_id != 0x01 /* National Semiconductor */
-	 || chip_id != 0x41 /* LM63 */
 	 || (reg_config1 & 0x18) != 0x00
 	 || (reg_config2 & 0xF8) != 0x00
 	 || (reg_alert_status & 0x20) != 0x00
@@ -450,7 +454,12 @@ static int lm63_detect(struct i2c_client *new_client,
 		return -ENODEV;
 	}
 
-	strlcpy(info->type, "lm63", I2C_NAME_SIZE);
+	if (chip_id == 0x41 && address == 0x4c)
+		strlcpy(info->type, "lm63", I2C_NAME_SIZE);
+	else if (chip_id == 0x51 && (address == 0x18 || address == 0x4e))
+		strlcpy(info->type, "lm64", I2C_NAME_SIZE);
+	else
+		return -ENODEV;
 
 	return 0;
 }
@@ -471,6 +480,8 @@ static int lm63_probe(struct i2c_client *new_client,
 	data->valid = 0;
 	mutex_init(&data->update_lock);
 
+	data->kind = id->driver_data;
+
 	/* Initialize the LM63 chip */
 	lm63_init_client(new_client);
 
-- 
1.7.0.1

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