ARM: OMAP: Warn if omap_ioremap is called before SoC detection

We don't have cpu_is_omapxxxx SoC detection initialized until
SoC detection is initialized from init_early.

Note that with the common map_io we should no longer need
cpu_is_omapxxxx for ioremap.

Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>

4 files changed, 14 insertions, 0 deletions

diff --git a/arch/arm/mach-omap1/io.c b/arch/arm/mach-omap1/io.c
index 8140a4ed66e4..fd9eb0984121 100644
--- a/arch/arm/mach-omap1/io.c
+++ b/arch/arm/mach-omap1/io.c
@@ -121,6 +121,7 @@ void __init omap16xx_map_io(void)
 void omap1_init_early(void)
 {
         omap_check_revision();
+        omap_ioremap_init();
 
         /* REVISIT: Refer to OMAP5910 Errata, Advisory SYS_1: "Timeout Abort
          * on a Posted Write in the TIPB Bridge".
diff --git a/arch/arm/mach-omap2/io.c b/arch/arm/mach-omap2/io.c
index d5caac3698dd..aa96538f3fee 100644
--- a/arch/arm/mach-omap2/io.c
+++ b/arch/arm/mach-omap2/io.c
@@ -323,6 +323,7 @@ void __iomem *omap_irq_base;
 static void __init omap_common_init_early(void)
 {
         omap2_check_revision();
+        omap_ioremap_init();
 }
 
 static void __init omap_hwmod_init_postsetup(void)
diff --git a/arch/arm/plat-omap/include/plat/io.h b/arch/arm/plat-omap/include/plat/io.h
index c0c785073141..5ffbea60be45 100644
--- a/arch/arm/plat-omap/include/plat/io.h
+++ b/arch/arm/plat-omap/include/plat/io.h
@@ -247,6 +247,8 @@
  * NOTE: Please use ioremap + __raw_read/write where possible instead of these
  */
 
+void omap_ioremap_init(void);
+
 extern u8 omap_readb(u32 pa);
 extern u16 omap_readw(u32 pa);
 extern u32 omap_readl(u32 pa);
diff --git a/arch/arm/plat-omap/io.c b/arch/arm/plat-omap/io.c
index f1ecfa9fc61d..1bbcbde76400 100644
--- a/arch/arm/plat-omap/io.c
+++ b/arch/arm/plat-omap/io.c
@@ -23,11 +23,16 @@
 #define BETWEEN(p,st,sz)        ((p) >= (st) && (p) < ((st) + (sz)))
 #define XLATE(p,pst,vst)        ((void __iomem *)((p) - (pst) + (vst)))
 
+static int initialized;
+
 /*
  * Intercept ioremap() requests for addresses in our fixed mapping regions.
  */
 void __iomem *omap_ioremap(unsigned long p, size_t size, unsigned int type)
 {
+
+        WARN(!initialized, "Do not use ioremap before init_early\n");
+
 #ifdef CONFIG_ARCH_OMAP1
         if (cpu_class_is_omap1()) {
                 if (BETWEEN(p, OMAP1_IO_PHYS, OMAP1_IO_SIZE))
@@ -139,3 +144,8 @@ void omap_iounmap(volatile void __iomem *addr)
                 __iounmap(addr);
 }
 EXPORT_SYMBOL(omap_iounmap);
+
+void __init omap_ioremap_init(void)
+{
+        initialized++;
+}