One idea that has come up in the past but never saw an implementation
is to make the ttyS namespace and minor numbers completely generic and
let any serial port driver use it. This would be a major rework, but
have the added advantage of cleaning up a number of other namespace
issues as well.
On Mon, 5 Jan 2015 22:09:45 -0500
Peter Hurley pe...@hurleysoftware.com wrote:
Some arches have no need to create unprobed 8250 ports; these phantom
ports are primarily required for ISA ports which have no probe
mechanism or to provide non-operational ports for userspace to
configure (via
On Thu, 18 Dec 2014 18:47:12 +0100
Sebastian Andrzej Siewior bige...@linutronix.de wrote:
This patch invokes add_preferred_console() with ttyS based on ttyO
arguments if the user didn't specify it on its own. This ensures that
the user will see the kernel booting on his serial console in case
On Mon, 1 Dec 2014 19:51:18 -0600
Felipe Balbi ba...@ti.com wrote:
On Tue, Dec 02, 2014 at 01:13:38AM +0200, Aaro Koskinen wrote:
Hi,
On Mon, Dec 01, 2014 at 02:09:14PM +, One Thousand Gnomes wrote:
Well the nightmare userspace switch from ttyS to ttyO few years ago
Well the nightmare userspace switch from ttyS to ttyO few years ago is
something we want to avoid.. I think the best solution would be to make
serial-omap.c transparently provide support for ttyO using the new 8250
code so both ttyS and ttyO devices would just work. Otherwise it will
be years
if (!up-dma || dma_err)
status = serial8250_rx_chars(up, status);
+
+ if (dma_err port-type == PORT_OMAP_16750)
+ serial8250_rx_dma(up, 0);
Can we stick to a 'has dma' flag and port-rx_dma() type usages so that
we don't
static inline void __stop_tx(struct uart_8250_port *p)
{
+ if (p-rs485.flags SER_RS485_ENABLED) {
+ int ret;
+
+ ret = (p-rs485.flags SER_RS485_RTS_AFTER_SEND) ? 1 : 0;
+ if (gpio_get_value(p-rts_gpio) != ret) {
+ if
On Wed, 9 Jul 2014 19:49:33 +0200
Sebastian Andrzej Siewior bige...@linutronix.de wrote:
The OMAP version of the 8250 can actually use 1:1 serial8250_startup().
However it needs to be extended by a wakeup irq which should to be
requested enabled at -startup() time and disabled at -shutdown()
On Fri, 4 Jul 2014 18:34:08 +0200
Sebastian Andrzej Siewior bige...@linutronix.de wrote:
There is no access to access a struct uart_8250_port for a specific
line. This is only required outside of the 8250/uart callbacks like for
devices' suspend remove callbacks. For those the 8250-core
On Fri, 4 Jul 2014 18:34:09 +0200
Sebastian Andrzej Siewior bige...@linutronix.de wrote:
The OMAP version of the 8250 can actually use 1:1 serial8250_startup().
However it needs to be extended by a wakeup irq which should to be
requested enabled at -startup() time.
Signed-off-by:
On Fri, 4 Jul 2014 18:34:10 +0200
Sebastian Andrzej Siewior bige...@linutronix.de wrote:
While comparing the OMAP-serial and the 8250 part of this I noticed that
the the latter does not use runtime-pm.
Yes it does, but 8250 parts (generally - omap presumably is special
here ?) need to be
On Fri, 4 Jul 2014 11:57:40 -0500
Robert Nelson robertcnel...@gmail.com wrote:
On Fri, Jul 4, 2014 at 11:51 AM, Sebastian Andrzej Siewior
bige...@linutronix.de wrote:
On 07/03/2014 09:34 AM, Tony Lindgren wrote:
Heh. Just to summarize the reason ttyO needs to be a separate name
and device
As soon as this patch
(http://www.spinics.net/lists/arm-kernel/msg325197.html) will be
applied, we don't really need this DTR GPIO any more.
For the omap specific case, not for the general case of sorting out power
hierarchies.
Alan
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I had a quick look and I guess that uart_change_pm() is the most likely
candidate for what you are referring to.
I can see how that interfaces to the specific piece of uart hardware, such as
omap-serial.c
But I cannot see how you would plumb that though to the device that was
plugged in to
But I don't have discrete hardware. I have a bunch of stuff soldered onto a
board with ad-hoc connections chosen to make the life of the hardware
builder
easy rather than chosen to make the life of the software developer easy
(which I think is the correct choice).
So I need to
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