Techwizz/kernel-fxtec-pro1x
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

USB: ftdi_sio: fix resolution of 2232H baud rate dividers

Browse source 
The 2232H high speed baud rates also support fractional baud
rate divisors, but when the performing the divisions before
the multiplication, the fractional bits are lost.

Signed-off-by: Daniel Glöckner <dg@emlix.com>
Acked-by: Mark Adamson <mark.adamson@ftdichip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Daniel Glöckner 2011-01-11 00:42:14 +01:00 committed by Greg Kroah-Hartman
parent 9abff15dd6
commit f6c259a39f
1 changed files with 1 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
drivers/usb/serial/ftdi_sio.c
View file

@ -955,7 +955,7 @@ static __u32 ftdi_2232h_baud_base_to_divisor(int baud, int base)
int divisor3;
/* hi-speed baud rate is 10-bit sampling instead of 16-bit */
divisor3 = (base / 10 / baud) * 8;
divisor3 = base * 8 / (baud * 10);
divisor = divisor3 >> 3;
divisor |= (__u32)divfrac[divisor3 & 0x7] << 14;