Merge tag 'tegra-for-3.10-dtc-cpp-chroot-std-headers' of git://git.kernel.org/pub/scm/linux/kernel/git/swarren/linux-tegra into for-next

Pull DT C pre-processor changes from Stephen Warren:

dt: run C pre-processor on *.dts, create some standard headers

This branch enhances the support for running dtc on device tree files.

A dedicated directory is created for header files that provide constants
for device-tree bindings.

The kbuild dependency script processor is enhanced to support processing
the dependency outputs from multiple separate commands at once.

The kbuild dtc rule is modified so that the C pre-processor is always
applied when compiling any device tree.

Some standard headers are created which define common constants for GPIO,
IRQ, and ARM GIC device tree bindings.

6 files changed, 125 insertions, 42 deletions

diff --git a/arch/arm/boot/dts/include/dt-bindings b/arch/arm/boot/dts/include/dt-bindings
new file mode 120000
index 000000000000..08c00e4972fa
--- /dev/null
+++ b/arch/arm/boot/dts/include/dt-bindings
@@ -0,0 +1 @@
+../../../../../include/dt-bindings
\ No newline at end of file
diff --git a/include/dt-bindings/gpio/gpio.h b/include/dt-bindings/gpio/gpio.h
new file mode 100644
index 000000000000..e6b1e0a808ae
--- /dev/null
+++ b/include/dt-bindings/gpio/gpio.h
@@ -0,0 +1,15 @@
+/*
+ * This header provides constants for most GPIO bindings.
+ *
+ * Most GPIO bindings include a flags cell as part of the GPIO specifier.
+ * In most cases, the format of the flags cell uses the standard values
+ * defined in this header.
+ */
+
+#ifndef _DT_BINDINGS_GPIO_GPIO_H
+#define _DT_BINDINGS_GPIO_GPIO_H
+
+#define GPIO_ACTIVE_HIGH 0
+#define GPIO_ACTIVE_LOW 1
+
+#endif
diff --git a/include/dt-bindings/interrupt-controller/arm-gic.h b/include/dt-bindings/interrupt-controller/arm-gic.h
new file mode 100644
index 000000000000..1ea1b702fec2
--- /dev/null
+++ b/include/dt-bindings/interrupt-controller/arm-gic.h
@@ -0,0 +1,22 @@
+/*
+ * This header provides constants for the ARM GIC.
+ */
+
+#ifndef _DT_BINDINGS_INTERRUPT_CONTROLLER_ARM_GIC_H
+#define _DT_BINDINGS_INTERRUPT_CONTROLLER_ARM_GIC_H
+
+#include <dt-bindings/interrupt-controller/irq.h>
+
+/* interrupt specific cell 0 */
+
+#define GIC_SPI 0
+#define GIC_PPI 1
+
+/*
+ * Interrupt specifier cell 2.
+ * The flaggs in irq.h are valid, plus those below.
+ */
+#define GIC_CPU_MASK_RAW(x) ((x) << 8)
+#define GIC_CPU_MASK_SIMPLE(num) GIC_CPU_MASK_RAW((1 << (num)) - 1)
+
+#endif
diff --git a/include/dt-bindings/interrupt-controller/irq.h b/include/dt-bindings/interrupt-controller/irq.h
new file mode 100644
index 000000000000..33a1003c55aa
--- /dev/null
+++ b/include/dt-bindings/interrupt-controller/irq.h
@@ -0,0 +1,19 @@
+/*
+ * This header provides constants for most IRQ bindings.
+ *
+ * Most IRQ bindings include a flags cell as part of the IRQ specifier.
+ * In most cases, the format of the flags cell uses the standard values
+ * defined in this header.
+ */
+
+#ifndef _DT_BINDINGS_INTERRUPT_CONTROLLER_IRQ_H
+#define _DT_BINDINGS_INTERRUPT_CONTROLLER_IRQ_H
+
+#define IRQ_TYPE_NONE           0
+#define IRQ_TYPE_EDGE_RISING    1
+#define IRQ_TYPE_EDGE_FALLING   2
+#define IRQ_TYPE_EDGE_BOTH      (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING)
+#define IRQ_TYPE_LEVEL_HIGH     4
+#define IRQ_TYPE_LEVEL_LOW      8
+
+#endif
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index 07125e697d7a..3e73dfd838cd 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -156,9 +156,9 @@ cpp_flags      = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE)     \
 
 ld_flags       = $(LDFLAGS) $(ldflags-y)
 
-dtc_cpp_flags  = -Wp,-MD,$(depfile) -nostdinc                            \
+dtc_cpp_flags  = -Wp,-MD,$(depfile).pre -nostdinc                        \
                  -I$(srctree)/arch/$(SRCARCH)/boot/dts                   \
-                 -I$(srctree)/arch/$(SRCARCH)/include/dts                \
+                 -I$(srctree)/arch/$(SRCARCH)/boot/dts/include           \
                  -undef -D__DTS__
 
 # Finds the multi-part object the current object will be linked into
@@ -269,20 +269,17 @@ $(obj)/%.dtb.S: $(obj)/%.dtb
         $(call cmd,dt_S_dtb)
 
 quiet_cmd_dtc = DTC     $@
-cmd_dtc = $(objtree)/scripts/dtc/dtc -O dtb -o $@ -b 0 $(DTC_FLAGS) -d $(depfile) $<
+cmd_dtc = $(CPP) $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \
+        $(objtree)/scripts/dtc/dtc -O dtb -o $@ -b 0 \
+                -i $(srctree)/arch/$(SRCARCH)/boot/dts $(DTC_FLAGS) \
+                -d $(depfile).dtc $(dtc-tmp) ; \
+        cat $(depfile).pre $(depfile).dtc > $(depfile)
 
 $(obj)/%.dtb: $(src)/%.dts FORCE
         $(call if_changed_dep,dtc)
 
 dtc-tmp = $(subst $(comma),_,$(dot-target).dts)
 
-quiet_cmd_dtc_cpp = DTC+CPP $@
-cmd_dtc_cpp = $(CPP) $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \
-        $(objtree)/scripts/dtc/dtc -O dtb -o $@ -b 0 $(DTC_FLAGS) $(dtc-tmp)
-
-$(obj)/%.dtb: $(src)/%.dtsp FORCE
-        $(call if_changed_dep,dtc_cpp)
-
 # Bzip2
 # ---------------------------------------------------------------------------
 
diff --git a/scripts/basic/fixdep.c b/scripts/basic/fixdep.c
index 7f6425e24ce3..078fe1d64e7d 100644
--- a/scripts/basic/fixdep.c
+++ b/scripts/basic/fixdep.c
@@ -320,49 +320,78 @@ static void parse_dep_file(void *map, size_t len)
         char *end = m + len;
         char *p;
         char s[PATH_MAX];
-        int first;
-
-        p = strchr(m, ':');
-        if (!p) {
-                fprintf(stderr, "fixdep: parse error\n");
-                exit(1);
-        }
-        memcpy(s, m, p-m); s[p-m] = 0;
-        m = p+1;
+        int is_target;
+        int saw_any_target = 0;
+        int is_first_dep = 0;
 
         clear_config();
 
-        first = 1;
         while (m < end) {
+                /* Skip any "white space" */
                 while (m < end && (*m == ' ' || *m == '\\' || *m == '\n'))
                         m++;
+                /* Find next "white space" */
                 p = m;
-                while (p < end && *p != ' ') p++;
-                if (p == end) {
-                        do p--; while (!isalnum(*p));
+                while (p < end && *p != ' ' && *p != '\\' && *p != '\n')
                         p++;
+                /* Is the token we found a target name? */
+                is_target = (*(p-1) == ':');
+                /* Don't write any target names into the dependency file */
+                if (is_target) {
+                        /* The /next/ file is the first dependency */
+                        is_first_dep = 1;
+                } else {
+                        /* Save this token/filename */
+                        memcpy(s, m, p-m);
+                        s[p - m] = 0;
+
+                        /* Ignore certain dependencies */
+                        if (strrcmp(s, "include/generated/autoconf.h") &&
+                            strrcmp(s, "arch/um/include/uml-config.h") &&
+                            strrcmp(s, "include/linux/kconfig.h") &&
+                            strrcmp(s, ".ver")) {
+                                /*
+                                 * Do not list the source file as dependency,
+                                 * so that kbuild is not confused if a .c file
+                                 * is rewritten into .S or vice versa. Storing
+                                 * it in source_* is needed for modpost to
+                                 * compute srcversions.
+                                 */
+                                if (is_first_dep) {
+                                        /*
+                                         * If processing the concatenation of
+                                         * multiple dependency files, only
+                                         * process the first target name, which
+                                         * will be the original source name,
+                                         * and ignore any other target names,
+                                         * which will be intermediate temporary
+                                         * files.
+                                         */
+                                        if (!saw_any_target) {
+                                                saw_any_target = 1;
+                                                printf("source_%s := %s\n\n",
+                                                        target, s);
+                                                printf("deps_%s := \\\n",
+                                                        target);
+                                        }
+                                        is_first_dep = 0;
+                                } else
+                                        printf("  %s \\\n", s);
+                                do_config_file(s);
+                        }
                 }
-                memcpy(s, m, p-m); s[p-m] = 0;
-                if (strrcmp(s, "include/generated/autoconf.h") &&
-                    strrcmp(s, "arch/um/include/uml-config.h") &&
-                    strrcmp(s, "include/linux/kconfig.h") &&
-                    strrcmp(s, ".ver")) {
-                        /*
-                         * Do not list the source file as dependency, so that
-                         * kbuild is not confused if a .c file is rewritten
-                         * into .S or vice versa. Storing it in source_* is
-                         * needed for modpost to compute srcversions.
-                         */
-                        if (first) {
-                                printf("source_%s := %s\n\n", target, s);
-                                printf("deps_%s := \\\n", target);
-                        } else
-                                printf("  %s \\\n", s);
-                        do_config_file(s);
-                }
-                first = 0;
+                /*
+                 * Start searching for next token immediately after the first
+                 * "whitespace" character that follows this token.
+                 */
                 m = p + 1;
         }
+
+        if (!saw_any_target) {
+                fprintf(stderr, "fixdep: parse error; no targets found\n");
+                exit(1);
+        }
+
         printf("\n%s: $(deps_%s)\n\n", target, target);
         printf("$(deps_%s):\n", target);
 }