[lkml]   [2012]   [Mar]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH] ARM: OMAP: Add support for AM35xx UART4/ttyO3
On 18/10/2011 20:47, Kyle Manna wrote:
> Add hwmod support to enable access to UART4 of the AM35xx series of
> chips. The UART4 device referenced from the TRM will show up as ttyO3.
> This was tested on an AM3505.
> Signed-off-by: Kyle Manna <>
> ---

Hi Kyle,

> arch/arm/mach-omap2/clock3xxx_data.c | 11 ++++++
> arch/arm/mach-omap2/omap_hwmod_3xxx_data.c | 52 ++++++++++++++++++++++++++++
> arch/arm/mach-omap2/prcm-common.h | 2 +
> arch/arm/plat-omap/include/plat/irqs.h | 2 +-
> arch/arm/plat-omap/include/plat/serial.h | 1 +
> 5 files changed, 67 insertions(+), 1 deletions(-)

Can I gently ask you which pinmux setup do you use to test your patch ?

I am trying to make uart4 working on a am3517 with mainline kernel
(3.3+, your patch is merged). However, on my board the uart4 pins are
shared with the camera, and not with SD, as maybe is more common. I set
the pinmux to switch the pins (gpio_95 / gpio_96 / gpio_97 /gpio_98) to
the uart4, and ttyO3 is registered and available, and thanks your patch
both clocks iclk and fclk are active. However, I cannot see activity on
the tx line if I try to send some characters.

Maybe do you use the same pinmux and am I forgetting something else ?

Stefano Babic

DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email:

 \ /
  Last update: 2012-03-22 17:13    [W:0.065 / U:18.284 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site