diff options
| author | Ingo Molnar <mingo@elte.hu> | 2010-05-03 11:17:01 +0400 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-05-03 11:17:01 +0400 |
| commit | 53ba4f2fa73225113a488584df0d85d3cba52943 (patch) | |
| tree | d85b984d9818abc3ccc0237eb53b710d9e96c39e /drivers/i2c/busses/i2c-tiny-usb.c | |
| parent | bd6d29c25bb1a24a4c160ec5de43e0004e01f72b (diff) | |
| parent | 66f41d4c5c8a5deed66fdcc84509376c9a0bf9d8 (diff) | |
| download | linux-53ba4f2fa73225113a488584df0d85d3cba52943.tar.xz | |
Merge commit 'v2.6.34-rc6' into core/locking
Diffstat (limited to 'drivers/i2c/busses/i2c-tiny-usb.c')
| -rw-r--r-- | drivers/i2c/busses/i2c-tiny-usb.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/drivers/i2c/busses/i2c-tiny-usb.c b/drivers/i2c/busses/i2c-tiny-usb.c index e29b6d5ba8ef..d03b04002f0d 100644 --- a/drivers/i2c/busses/i2c-tiny-usb.c +++ b/drivers/i2c/busses/i2c-tiny-usb.c @@ -13,6 +13,7 @@ #include <linux/kernel.h> #include <linux/errno.h> #include <linux/module.h> +#include <linux/slab.h> #include <linux/types.h> /* include interfaces to usb layer */ @@ -31,11 +32,13 @@ #define CMD_I2C_IO_BEGIN (1<<0) #define CMD_I2C_IO_END (1<<1) -/* i2c bit delay, default is 10us -> 100kHz */ +/* i2c bit delay, default is 10us -> 100kHz max + (in practice, due to additional delays in the i2c bitbanging + code this results in a i2c clock of about 50kHz) */ static unsigned short delay = 10; module_param(delay, ushort, 0); -MODULE_PARM_DESC(delay, "bit delay in microseconds, " - "e.g. 10 for 100kHz (default is 100kHz)"); +MODULE_PARM_DESC(delay, "bit delay in microseconds " + "(default is 10us for 100kHz max)"); static int usb_read(struct i2c_adapter *adapter, int cmd, int value, int index, void *data, int len); @@ -137,7 +140,7 @@ static const struct i2c_algorithm usb_algorithm = { * Future Technology Devices International Ltd., later a pair was * bought from EZPrototypes */ -static struct usb_device_id i2c_tiny_usb_table [] = { +static const struct usb_device_id i2c_tiny_usb_table[] = { { USB_DEVICE(0x0403, 0xc631) }, /* FTDI */ { USB_DEVICE(0x1c40, 0x0534) }, /* EZPrototypes */ { } /* Terminating entry */ |