From: Corey Minyard <minyard@acm.org>
To: Greg KH <greg@kroah.com>
Cc: Andrew Morton <akpm@osdl.org>, lkml <linux-kernel@vger.kernel.org>
Subject: [PATCH] I2C patch 6 - Add a block smbus read handler to the I2C core
Date: Thu, 24 Feb 2005 17:33:54 -0600 [thread overview]
Message-ID: <421E6462.6070800@acm.org> (raw)
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This is one in a series of patches for adding a non-blocking interface
to the I2C driver for supporting the IPMI SMBus driver.
[-- Attachment #2: i2c_add_read_block.diff --]
[-- Type: text/plain, Size: 1857 bytes --]
This adds back in the i2c_smbus_read_block_data() function
which is needed by the IPMI SMB driver (coming soon).
Signed-off-by: Corey Minyard <minyard@acm.org>
Index: linux-2.6.11-rc4/drivers/i2c/i2c-core.c
===================================================================
--- linux-2.6.11-rc4.orig/drivers/i2c/i2c-core.c
+++ linux-2.6.11-rc4/drivers/i2c/i2c-core.c
@@ -1247,6 +1247,23 @@
}
/* Returns the number of read bytes */
+s32 i2c_smbus_read_block_data(struct i2c_client *client, u8 command,
+ u8 *values)
+{
+ union i2c_smbus_data data;
+ int i;
+ if (i2c_smbus_xfer(client->adapter,client->addr,client->flags,
+ I2C_SMBUS_READ,command,
+ I2C_SMBUS_BLOCK_DATA,&data))
+ return -1;
+ else {
+ for (i = 1; i <= data.block[0]; i++)
+ values[i-1] = data.block[i];
+ return data.block[0];
+ }
+}
+
+/* Returns the number of read bytes */
s32 i2c_smbus_read_i2c_block_data(struct i2c_client *client, u8 command, u8 *values)
{
union i2c_smbus_data data;
@@ -1734,6 +1751,7 @@
EXPORT_SYMBOL(i2c_smbus_read_word_data);
EXPORT_SYMBOL(i2c_smbus_write_word_data);
EXPORT_SYMBOL(i2c_smbus_write_block_data);
+EXPORT_SYMBOL(i2c_smbus_read_block_data);
EXPORT_SYMBOL(i2c_smbus_read_i2c_block_data);
EXPORT_SYMBOL(i2c_non_blocking_capable);
Index: linux-2.6.11-rc4/include/linux/i2c.h
===================================================================
--- linux-2.6.11-rc4.orig/include/linux/i2c.h
+++ linux-2.6.11-rc4/include/linux/i2c.h
@@ -98,6 +98,8 @@
extern s32 i2c_smbus_write_block_data(struct i2c_client * client,
u8 command, u8 length,
u8 *values);
+extern s32 i2c_smbus_read_block_data(struct i2c_client * client,
+ u8 command, u8 *values);
extern s32 i2c_smbus_read_i2c_block_data(struct i2c_client * client,
u8 command, u8 *values);
reply other threads:[~2005-02-24 23:40 UTC|newest]
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