linux-toradex.git/drivers/tty/serial/uartlite.c, branch v4.14-rc5

uartlite: Adding a kernel parameter for the number of uartlites

2017-03-17T05:14:30+00:00

The number of uartlites should be set by a kernel parameter instead of
using a #define. This allows the user to set the number of uartlites
using only kconfig and not modifying kernel source.

The uartlite is used by FPGAs that support a basically unlimited number
of uarts so limiting it at 16 dosn't make sense as users might need more
than that.

Signed-off-by: Sam Povilus 
Signed-off-by: Greg Kroah-Hartman

serial-uartlite: constify uart_ops structures

2016-09-02T13:01:16+00:00

Check for uart_ops structures that are only stored in the ops field of a
uart_port structure.  This field is declared const, so uart_ops structures
that have this property can be declared as const also.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// 
@r disable optional_qualifier@
identifier i;
position p;
@@
static struct uart_ops i@p = { ... };

@ok@
identifier r.i;
struct uart_port e;
position p;
@@
e.ops = &i@p;

@bad@
position p != {r.p,ok.p};
identifier r.i;
struct uart_ops e;
@@
e@i@p

@depends on !bad disable optional_qualifier@
identifier r.i;
@@
static
+const
 struct uart_ops i = { ... };
// 

Signed-off-by: Julia Lawall 
Signed-off-by: Greg Kroah-Hartman

serial-uartlite: Constify uartlite_be/uartlite_le

2016-04-30T16:26:55+00:00

Made uartlite_be and uartlite_le constants.

Signed-off-by: Maarten Brock 
Signed-off-by: Greg Kroah-Hartman

Revert "serial-uartlite: Constify uartlite_be/uartlite_le"

2016-04-19T06:15:38+00:00

This reverts commit 2905697a82eaf20606ced164d853b52d1b94aaa8.

The commit introduced two build warnings:
drivers/tty/serial/uartlite.c: In function ‘ulite_request_port’:
drivers/tty/serial/uartlite.c:348:21: warning: assignment discards
			‘const’ qualifier from pointer target type
  port->private_data = &uartlite_be;
                     ^
drivers/tty/serial/uartlite.c:354:22: warning: assignment discards
			‘const’ qualifier from pointer target type
   port->private_data = &uartlite_le;
                      ^

Signed-off-by: Sudip Mukherjee 
Cc: Maarten Brock 
Cc: Arnd Bergmann 
Signed-off-by: Greg Kroah-Hartman

serial-uartlite: Configure for rising edge irq trigger.

2016-03-08T00:11:14+00:00

This device generates a short rising pulse on the interrupt request line.

Signed-off-by: Maarten Brock 
Signed-off-by: Greg Kroah-Hartman

serial-uartlite: Spinlock inside the loop.

2016-03-08T00:11:14+00:00

Better to hold the spinlock as short as possible.

Signed-off-by: Maarten Brock 
Signed-off-by: Greg Kroah-Hartman

serial-uartlite: Constify uartlite_be/uartlite_le

2016-03-08T00:11:14+00:00

Made uartlite_be and uartlite_le constants.

Signed-off-by: Maarten Brock 
Signed-off-by: Greg Kroah-Hartman

serial-uartlite: Enlarge maximum nr of devices to 16.

2016-03-08T00:11:14+00:00

This device is ideal to use when you need a lot of uarts in your FPGA.
Try not to force all those users to patch their kernel.

Signed-off-by: Maarten Brock 
Signed-off-by: Greg Kroah-Hartman

serial-uartlite: fix missing locking in isr

2016-02-07T06:56:43+00:00

The uartlite driver suffers from missing/duplicate/corrupted character
data when the interrupt handler runs concurrently with access to the
device from another cpu. Take the port spinlock to exclude concurrent
access.

Signed-off-by: Rich Felker 
Signed-off-by: Greg Kroah-Hartman

serial-uartlite: add earlycon support

2016-02-07T06:56:43+00:00

Microblaze currently uses the old earlyprintk system, rather than the
unified earlycon support, to show boot messages on uartlite. Add
earlycon support so that other archs using uartlite can benefit from
it. The new code in uartlite.c is copied almost verbatim from
arch/microblaze/kernel/early_printk.c.

Signed-off-by: Rich Felker 
Signed-off-by: Greg Kroah-Hartman