docs: pti_intel_mid.txt: convert it to pti_intel_mid.rst

Convert this small file to ReST format and rename it.

Most of the conversion were related to adjusting whitespaces
in order for each section to be properly parsed.

While this is not part of any book, mark it as :orphan:, in order
to avoid build warnings.
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

Documentation/pti/pti_intel_mid.txt → Documentation/pti/pti_intel_mid.rst

+:orphan:
+
+=============
+Intel MID PTI
+=============
+
 The Intel MID PTI project is HW implemented in Intel Atom
 system-on-a-chip designs based on the Parallel Trace
 Interface for MIPI P1149.7 cJTAG standard.  The kernel solution
-for this platform involves the following files:
+for this platform involves the following files::
 
-./include/linux/pti.h
-./drivers/.../n_tracesink.h
-./drivers/.../n_tracerouter.c
-./drivers/.../n_tracesink.c
-./drivers/.../pti.c
+	./include/linux/pti.h
+	./drivers/.../n_tracesink.h
+	./drivers/.../n_tracerouter.c
+	./drivers/.../n_tracesink.c
+	./drivers/.../pti.c
 
 pti.c is the driver that enables various debugging features
 popular on platforms from certain mobile manufacturers.
@@ -24,13 +30,14 @@ kernel->user->kernel context switch overheads of routing
 data).
 
 An example debugging usage for this driver system:
-   *Hook /dev/ttyPTI0 to syslogd.  Opening this port will also start
+
+  * Hook /dev/ttyPTI0 to syslogd.  Opening this port will also start
     a console device to further capture debugging messages to PTI.
-   *Hook /dev/ttyPTI1 to modem debugging data to write to PTI HW.
+  * Hook /dev/ttyPTI1 to modem debugging data to write to PTI HW.
     This is where n_tracerouter and n_tracesink are used.
-   *Hook /dev/pti to a user-level debugging application for writing
+  * Hook /dev/pti to a user-level debugging application for writing
     to PTI HW.
-   *Use mipi_* Kernel Driver API in other device drivers for
+  * `Use mipi_` Kernel Driver API in other device drivers for
     debugging to PTI by first requesting a PTI write address via
     mipi_request_masterchannel(1).
 
@@ -42,58 +49,58 @@ but is not just blindly executing as 'root'. Keep in mind
 the use of ioctl(,TIOCSETD,) is not specific to the n_tracerouter
 and n_tracesink line discpline drivers but is a generic
 operation for a program to use a line discpline driver
-on a tty port other than the default n_tty.
-
-/////////// To hook up n_tracerouter and n_tracesink /////////
-
-// Note that n_tracerouter depends on n_tracesink.
-#include <errno.h>
-#define ONE_TTY "/dev/ttyOne"
-#define TWO_TTY "/dev/ttyTwo"
-
-// needed global to hand onto ldisc connection
-static int g_fd_source = -1;
-static int g_fd_sink  = -1;
-
-// these two vars used to grab LDISC values from loaded ldisc drivers
-// in OS.  Look at /proc/tty/ldiscs to get the right numbers from
-// the ldiscs loaded in the system.
-int source_ldisc_num, sink_ldisc_num = -1;
-int retval;
-
-g_fd_source = open(ONE_TTY, O_RDWR); // must be R/W
-g_fd_sink   = open(TWO_TTY, O_RDWR); // must be R/W
-
-if (g_fd_source <= 0) || (g_fd_sink <= 0) {
-   // doubt you'll want to use these exact error lines of code
-   printf("Error on open(). errno: %d\n",errno);
-   return errno;
-}
-
-retval = ioctl(g_fd_sink, TIOCSETD, &sink_ldisc_num);
-if (retval < 0) {
-   printf("Error on ioctl().  errno: %d\n", errno);
-   return errno;
-}
-
-retval = ioctl(g_fd_source, TIOCSETD, &source_ldisc_num);
-if (retval < 0) {
-   printf("Error on ioctl().  errno: %d\n", errno);
-   return errno;
-}
-
-/////////// To disconnect n_tracerouter and n_tracesink ////////
-
-// First make sure data through the ldiscs has stopped.
-
-// Second, disconnect ldiscs.  This provides a
-// little cleaner shutdown on tty stack.
-sink_ldisc_num = 0;
-source_ldisc_num = 0;
-ioctl(g_fd_uart, TIOCSETD, &sink_ldisc_num);
-ioctl(g_fd_gadget, TIOCSETD, &source_ldisc_num);
-
-// Three, program closes connection, and cleanup:
-close(g_fd_uart);
-close(g_fd_gadget);
-g_fd_uart = g_fd_gadget = NULL;
+on a tty port other than the default n_tty::
+
+  /////////// To hook up n_tracerouter and n_tracesink /////////
+
+  // Note that n_tracerouter depends on n_tracesink.
+  #include <errno.h>
+  #define ONE_TTY "/dev/ttyOne"
+  #define TWO_TTY "/dev/ttyTwo"
+
+  // needed global to hand onto ldisc connection
+  static int g_fd_source = -1;
+  static int g_fd_sink  = -1;
+
+  // these two vars used to grab LDISC values from loaded ldisc drivers
+  // in OS.  Look at /proc/tty/ldiscs to get the right numbers from
+  // the ldiscs loaded in the system.
+  int source_ldisc_num, sink_ldisc_num = -1;
+  int retval;
+
+  g_fd_source = open(ONE_TTY, O_RDWR); // must be R/W
+  g_fd_sink   = open(TWO_TTY, O_RDWR); // must be R/W
+
+  if (g_fd_source <= 0) || (g_fd_sink <= 0) {
+     // doubt you'll want to use these exact error lines of code
+     printf("Error on open(). errno: %d\n",errno);
+     return errno;
+  }
+
+  retval = ioctl(g_fd_sink, TIOCSETD, &sink_ldisc_num);
+  if (retval < 0) {
+     printf("Error on ioctl().  errno: %d\n", errno);
+     return errno;
+  }
+
+  retval = ioctl(g_fd_source, TIOCSETD, &source_ldisc_num);
+  if (retval < 0) {
+     printf("Error on ioctl().  errno: %d\n", errno);
+     return errno;
+  }
+
+  /////////// To disconnect n_tracerouter and n_tracesink ////////
+
+  // First make sure data through the ldiscs has stopped.
+
+  // Second, disconnect ldiscs.  This provides a
+  // little cleaner shutdown on tty stack.
+  sink_ldisc_num = 0;
+  source_ldisc_num = 0;
+  ioctl(g_fd_uart, TIOCSETD, &sink_ldisc_num);
+  ioctl(g_fd_gadget, TIOCSETD, &source_ldisc_num);
+
+  // Three, program closes connection, and cleanup:
+  close(g_fd_uart);
+  close(g_fd_gadget);
+  g_fd_uart = g_fd_gadget = NULL;