dm: core: Change platform specific translation-offset handling

Testing has shown that the current DM implementation of a platform /
board specific translation offset, as its needed for the SPL on MVEBU
platforms is buggy. The translation offset is confingured too late,
after the driver bind functions are run. This may result in incorrect
address translations. With the current implementation its not possible
to configure the offset earlier, as the DM code has not run at all.

This patch now removed the set_/get_translation_offset() calls and
moves the translation offset into the GD variable translation_offset.
This variable will get used when CONFIG_TRANSLATION_OFFSET is enabled.
This option is enabled only for MVEBU on ARM32 platforms, where its
currenty needed and configured in the SPL.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Pierre Bourdon <delroth@gmail.com>
Cc: Baruch Siach <baruch@tkos.co.il>
Cc: Simon Glass <sjg@chromium.org>
Cc: Heiko Schocher <hs@denx.de>
Cc: Tom Rini <trini@konsulko.com>
Tested-by: Pierre Bourdon <delroth@gmail.com>
Tested-by: Baruch Siach <baruch@tkos.co.il>

3 files changed, 15 insertions, 24 deletions

diff --git a/drivers/core/Kconfig b/drivers/core/Kconfig
index ddf2fb3fb8..2d195ae35e 100644
--- a/drivers/core/Kconfig
+++ b/drivers/core/Kconfig
@@ -225,6 +225,15 @@ config SPL_OF_TRANSLATE
 	  used for the address translation. This function is faster and
 	  smaller in size than fdt_translate_address().
 
+config TRANSLATION_OFFSET
+	bool "Platforms specific translation offset"
+	depends on DM && OF_CONTROL
+	help
+	  Some platforms need a special address translation. Those
+	  platforms (e.g. mvebu in SPL) can configure a translation
+	  offset by enabling this option and setting the translation_offset
+	  variable in the GD in their platform- / board-specific code.
+
 config OF_ISA_BUS
 	bool
 	depends on OF_TRANSLATE
diff --git a/drivers/core/fdtaddr.c b/drivers/core/fdtaddr.c
index e113f1dd39..c2873861da 100644
--- a/drivers/core/fdtaddr.c
+++ b/drivers/core/fdtaddr.c
@@ -74,13 +74,16 @@ fdt_addr_t devfdt_get_addr_index(struct udevice *dev, int index)
 		}
 	}
 
+#if defined(CONFIG_TRANSLATION_OFFSET)
 	/*
 	 * Some platforms need a special address translation. Those
 	 * platforms (e.g. mvebu in SPL) can configure a translation
-	 * offset in the DM by calling dm_set_translation_offset() that
-	 * will get added to all addresses returned by devfdt_get_addr().
+	 * offset by setting this value in the GD and enaling this
+	 * feature via CONFIG_TRANSLATION_OFFSET. This value will
+	 * get added to all addresses returned by devfdt_get_addr().
 	 */
-	addr += dm_get_translation_offset();
+	addr += gd->translation_offset;
+#endif
 
 	return addr;
 #else
diff --git a/drivers/core/root.c b/drivers/core/root.c
index e6ec7faf37..8fa096648e 100644
--- a/drivers/core/root.c
+++ b/drivers/core/root.c
@@ -25,10 +25,6 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
-struct root_priv {
-	fdt_addr_t translation_offset;	/* optional translation offset */
-};
-
 static const struct driver_info root_info = {
 	.name		= "root_driver",
 };
@@ -52,22 +48,6 @@ void dm_fixup_for_gd_move(struct global_data *new_gd)
 	}
 }
 
-fdt_addr_t dm_get_translation_offset(void)
-{
-	struct udevice *root = dm_root();
-	struct root_priv *priv = dev_get_priv(root);
-
-	return priv->translation_offset;
-}
-
-void dm_set_translation_offset(fdt_addr_t offs)
-{
-	struct udevice *root = dm_root();
-	struct root_priv *priv = dev_get_priv(root);
-
-	priv->translation_offset = offs;
-}
-
 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
 void fix_drivers(void)
 {
@@ -420,7 +400,6 @@ int dm_init_and_scan(bool pre_reloc_only)
 U_BOOT_DRIVER(root_driver) = {
 	.name	= "root_driver",
 	.id	= UCLASS_ROOT,
-	.priv_auto_alloc_size = sizeof(struct root_priv),
 };
 
 /* This is the root uclass */