From b47e8f55999b3d6e247ec4e1bb333606e7ebe5db Mon Sep 17 00:00:00 2001
From: Khem Raj <raj.khem@gmail.com>
Date: Wed, 13 Jan 2016 14:35:43 -0800
Subject: rpi-gpio: Upgrade to 0.6.1 and fix build with clang

Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
 .../rpi-gpio/0001-Remove-nested-functions.patch    | 294 +++++++++++++++++++++
 1 file changed, 294 insertions(+)
 create mode 100644 recipes-devtools/python/rpi-gpio/0001-Remove-nested-functions.patch

(limited to 'recipes-devtools/python/rpi-gpio/0001-Remove-nested-functions.patch')

diff --git a/recipes-devtools/python/rpi-gpio/0001-Remove-nested-functions.patch b/recipes-devtools/python/rpi-gpio/0001-Remove-nested-functions.patch
new file mode 100644
index 0000000..bd97179
--- /dev/null
+++ b/recipes-devtools/python/rpi-gpio/0001-Remove-nested-functions.patch
@@ -0,0 +1,294 @@
+From 23d7ab77865f8b17042f5cd4c6720cca475e0eb5 Mon Sep 17 00:00:00 2001
+From: Khem Raj <raj.khem@gmail.com>
+Date: Wed, 13 Jan 2016 14:27:10 -0800
+Subject: [PATCH] Remove nested functions
+
+nested functions are not supported on llvm/clang compiler, replacing
+them helps make code portable and be compilable with non-gcc compilers
+additionally fix the diagnostic messages clang reported
+
+source/c_gpio.c:130:18: warning: comparison of distinct pointer types
+('volatile uint32_t *' (aka 'volatile unsigned int *') an
+d 'void *') [-Wcompare-distinct-pointer-types]
+    if (gpio_map < MAP_FAILED)
+        ~~~~~~~~ ^ ~~~~~~~~~~
+
+        source/c_gpio.c:89:13: warning: variable 'peri_base' is used
+uninitialized whenever 'if' condition is false [-Wsometimes-uninit
+ialized]
+        if (fread(buf, 1, sizeof buf, fp) == sizeof buf) {
+            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+source/c_gpio.c:116:17: note: uninitialized use occurs here
+    gpio_base = peri_base + GPIO_BASE_OFFSET;
+                ^~~~~~~~~
+source/c_gpio.c:89:9: note: remove the 'if' if its condition is always
+true
+        if (fread(buf, 1, sizeof buf, fp) == sizeof buf) {
+        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+source/c_gpio.c:64:23: note: initialize the variable 'peri_base' to
+silence this warning
+    uint32_t peri_base;
+
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+---
+Upstream-Status: Submitted
+
+ source/c_gpio.c  |   6 +--
+ source/py_gpio.c | 135 ++++++++++++++++++++++++++++---------------------------
+ 2 files changed, 71 insertions(+), 70 deletions(-)
+
+diff --git a/source/c_gpio.c b/source/c_gpio.c
+index c96a2b0..b69880f 100644
+--- a/source/c_gpio.c
++++ b/source/c_gpio.c
+@@ -61,7 +61,7 @@ int setup(void)
+ {
+     int mem_fd;
+     uint8_t *gpio_mem;
+-    uint32_t peri_base;
++    uint32_t peri_base = 0;
+     uint32_t gpio_base;
+     unsigned char buf[4];
+     FILE *fp;
+@@ -73,7 +73,7 @@ int setup(void)
+     if ((mem_fd = open("/dev/gpiomem", O_RDWR|O_SYNC)) > 0)
+     {
+         gpio_map = (uint32_t *)mmap(NULL, BLOCK_SIZE, PROT_READ|PROT_WRITE, MAP_SHARED, mem_fd, 0);
+-        if ((uint32_t)gpio_map < 0) {
++        if (gpio_map == MAP_FAILED) {
+             return SETUP_MMAP_FAIL;
+         } else {
+             return SETUP_OK;
+@@ -127,7 +127,7 @@ int setup(void)
+ 
+     gpio_map = (uint32_t *)mmap( (void *)gpio_mem, BLOCK_SIZE, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_FIXED, mem_fd, gpio_base);
+ 
+-    if ((uint32_t)gpio_map < 0)
++    if (gpio_map == MAP_FAILED)
+         return SETUP_MMAP_FAIL;
+ 
+     return SETUP_OK;
+diff --git a/source/py_gpio.c b/source/py_gpio.c
+index d54cc7f..007bad5 100644
+--- a/source/py_gpio.c
++++ b/source/py_gpio.c
+@@ -69,6 +69,20 @@ static int mmap_gpio_mem(void)
+       return 0;
+    }
+ }
++static inline int cleanup_one(unsigned int gpio)
++{
++   // clean up any /sys/class exports
++   event_cleanup(gpio);
++
++   // set everything back to input
++   if (gpio_direction[gpio] != -1) {
++      setup_gpio(gpio, INPUT, PUD_OFF);
++      gpio_direction[gpio] = -1;
++      return 1;
++   }
++   return 0;
++}
++
+ 
+ // python function cleanup(channel=None)
+ static PyObject *py_cleanup(PyObject *self, PyObject *args, PyObject *kwargs)
+@@ -83,19 +97,6 @@ static PyObject *py_cleanup(PyObject *self, PyObject *args, PyObject *kwargs)
+    PyObject *tempobj;
+    static char *kwlist[] = {"channel", NULL};
+ 
+-   void cleanup_one(void)
+-   {
+-      // clean up any /sys/class exports
+-      event_cleanup(gpio);
+-
+-      // set everything back to input
+-      if (gpio_direction[gpio] != -1) {
+-         setup_gpio(gpio, INPUT, PUD_OFF);
+-         gpio_direction[gpio] = -1;
+-         found = 1;
+-      }
+-   }
+-
+    if (!PyArg_ParseTupleAndKeywords(args, kwargs, "|O", kwlist, &chanlist))
+       return NULL;
+ 
+@@ -140,7 +141,7 @@ static PyObject *py_cleanup(PyObject *self, PyObject *args, PyObject *kwargs)
+       } else if (channel != -666) {    // channel was an int indicating single channel
+          if (get_gpio_number(channel, &gpio))
+             return NULL;
+-         cleanup_one();
++         found = cleanup_one(gpio);
+       } else {  // channel was a list/tuple
+          for (i=0; i<chancount; i++) {
+             if (chanlist) {
+@@ -169,7 +170,7 @@ static PyObject *py_cleanup(PyObject *self, PyObject *args, PyObject *kwargs)
+ 
+             if (get_gpio_number(channel, &gpio))
+                return NULL;
+-            cleanup_one();
++            found = cleanup_one(gpio);
+          }
+       }
+    }
+@@ -182,6 +183,37 @@ static PyObject *py_cleanup(PyObject *self, PyObject *args, PyObject *kwargs)
+    Py_RETURN_NONE;
+ }
+ 
++static inline int setup_one(unsigned int *gpio, int channel, int pud, int direction, int initial) {
++   if (get_gpio_number(channel, gpio))
++      return 0;
++
++   int func = gpio_function(*gpio);
++   if (gpio_warnings &&                             // warnings enabled and
++       ((func != 0 && func != 1) ||                 // (already one of the alt functions or
++       (gpio_direction[*gpio] == -1 && func == 1)))  // already an output not set from this program)
++   {
++      PyErr_WarnEx(NULL, "This channel is already in use, continuing anyway.  Use GPIO.setwarnings(False) to disable warnings.", 1);
++   }
++
++   // warn about pull/up down on i2c channels
++   if (gpio_warnings) {
++      if (rpiinfo.p1_revision == 0) { // compute module - do nothing
++      } else if ((rpiinfo.p1_revision == 1 && (*gpio == 0 || *gpio == 1)) ||
++                 (*gpio == 2 || *gpio == 3)) {
++         if (pud == PUD_UP || pud == PUD_DOWN)
++            PyErr_WarnEx(NULL, "A physical pull up resistor is fitted on this channel!", 1);
++      }
++   }
++
++   if (direction == OUTPUT && (initial == LOW || initial == HIGH)) {
++      output_gpio(*gpio, initial);
++   }
++   setup_gpio(*gpio, direction, pud);
++   gpio_direction[*gpio] = direction;
++   return 1;
++}
++
++
+ // python function setup(channel(s), direction, pull_up_down=PUD_OFF, initial=None)
+ static PyObject *py_setup_channel(PyObject *self, PyObject *args, PyObject *kwargs)
+ {
+@@ -195,37 +227,6 @@ static PyObject *py_setup_channel(PyObject *self, PyObject *args, PyObject *kwar
+    int pud = PUD_OFF + PY_PUD_CONST_OFFSET;
+    int initial = -1;
+    static char *kwlist[] = {"channel", "direction", "pull_up_down", "initial", NULL};
+-   int func;
+-
+-   int setup_one(void) {
+-      if (get_gpio_number(channel, &gpio))
+-         return 0;
+-
+-      func = gpio_function(gpio);
+-      if (gpio_warnings &&                             // warnings enabled and
+-          ((func != 0 && func != 1) ||                 // (already one of the alt functions or
+-          (gpio_direction[gpio] == -1 && func == 1)))  // already an output not set from this program)
+-      {
+-         PyErr_WarnEx(NULL, "This channel is already in use, continuing anyway.  Use GPIO.setwarnings(False) to disable warnings.", 1);
+-      }
+-
+-      // warn about pull/up down on i2c channels
+-      if (gpio_warnings) {
+-         if (rpiinfo.p1_revision == 0) { // compute module - do nothing
+-         } else if ((rpiinfo.p1_revision == 1 && (gpio == 0 || gpio == 1)) ||
+-                    (gpio == 2 || gpio == 3)) {
+-            if (pud == PUD_UP || pud == PUD_DOWN)
+-               PyErr_WarnEx(NULL, "A physical pull up resistor is fitted on this channel!", 1);
+-         }
+-      }
+-
+-      if (direction == OUTPUT && (initial == LOW || initial == HIGH)) {
+-         output_gpio(gpio, initial);
+-      }
+-      setup_gpio(gpio, direction, pud);
+-      gpio_direction[gpio] = direction;
+-      return 1;
+-   }
+ 
+    if (!PyArg_ParseTupleAndKeywords(args, kwargs, "Oi|ii", kwlist, &chanlist, &direction, &pud, &initial))
+       return NULL;
+@@ -290,7 +291,7 @@ static PyObject *py_setup_channel(PyObject *self, PyObject *args, PyObject *kwar
+    } else if (chantuple) {
+        chancount = PyTuple_Size(chantuple);
+    } else {
+-       if (!setup_one())
++       if (!setup_one(&gpio, channel, pud, direction, initial))
+           return NULL;
+        Py_RETURN_NONE;
+    }
+@@ -320,12 +321,29 @@ static PyObject *py_setup_channel(PyObject *self, PyObject *args, PyObject *kwar
+           return NULL;
+       }
+ 
+-      if (!setup_one())
++      if (!setup_one(&gpio, channel, pud, direction, initial))
+          return NULL;
+    }
+ 
+    Py_RETURN_NONE;
+ }
++static inline int output_val(unsigned int *gpio, int channel, int value) {
++   if (get_gpio_number(channel, gpio))
++       return 0;
++
++   if (gpio_direction[*gpio] != OUTPUT)
++   {
++      PyErr_SetString(PyExc_RuntimeError, "The GPIO channel has not been set up as an OUTPUT");
++      return 0;
++   }
++
++   if (check_gpio_priv())
++      return 0;
++
++   output_gpio(*gpio, value);
++   return 1;
++}
++
+ 
+ // python function output(channel(s), value(s))
+ static PyObject *py_output_gpio(PyObject *self, PyObject *args)
+@@ -342,23 +360,6 @@ static PyObject *py_output_gpio(PyObject *self, PyObject *args)
+    int chancount = -1;
+    int valuecount = -1;
+ 
+-   int output(void) {
+-      if (get_gpio_number(channel, &gpio))
+-          return 0;
+-
+-      if (gpio_direction[gpio] != OUTPUT)
+-      {
+-         PyErr_SetString(PyExc_RuntimeError, "The GPIO channel has not been set up as an OUTPUT");
+-         return 0;
+-      }
+-
+-      if (check_gpio_priv())
+-         return 0;
+-
+-      output_gpio(gpio, value);
+-      return 1;
+-   }
+-
+    if (!PyArg_ParseTuple(args, "OO", &chanlist, &valuelist))
+        return NULL;
+ 
+@@ -416,7 +417,7 @@ static PyObject *py_output_gpio(PyObject *self, PyObject *args)
+    }
+ 
+    if (chancount == -1) {
+-      if (!output())
++      if (!output_val(&gpio, channel, value))
+          return NULL;
+       Py_RETURN_NONE;
+    }
+@@ -472,7 +473,7 @@ static PyObject *py_output_gpio(PyObject *self, PyObject *args)
+               return NULL;
+           }
+       }
+-      if (!output())
++      if (!output_val(&gpio, channel, value))
+          return NULL;
+    }
+ 
+-- 
+2.7.0
+
-- 
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