[U-Boot] [PATCH v4 3/4] ARM: bcm283x: Set rpi_bcm283x_base at run-time

[matthias.bgg at kernel.org]

From: Matthias Brugger <mbrugger at suse.com>

As part of the effort to create one binary for several bcm83x SoCs
we read the IO base address from device-tree.

Signed-off-by: Matthias Brugger <mbrugger at suse.com>

---

Changes in v4:
- read IO base from device-tree

Changes in v3: None
Changes in v2:
- rename BCM2838 to BCM2711 in the correct patch
- push rpi_bcm283x_base into the .data section

 arch/arm/mach-bcm283x/Kconfig |  6 ------
 arch/arm/mach-bcm283x/init.c  | 20 ++++++++++++++++++--
 2 files changed, 18 insertions(+), 8 deletions(-)

diff --git a/arch/arm/mach-bcm283x/Kconfig b/arch/arm/mach-bcm283x/Kconfig
index b08275f598..e8e0ff0eb4 100644
--- a/arch/arm/mach-bcm283x/Kconfig
+++ b/arch/arm/mach-bcm283x/Kconfig
@@ -202,10 +202,4 @@ config SYS_SOC
 config SYS_CONFIG_NAME
 	default "rpi"
 
-config BCM283x_BASE
-	hex
-	default "0x20000000" if BCM2835
-	default "0x3f000000" if BCM2836 || BCM2837
-	default "0xfe000000" if BCM2711
-
 endmenu
diff --git a/arch/arm/mach-bcm283x/init.c b/arch/arm/mach-bcm283x/init.c
index d36017e823..b3f3dfabea 100644
--- a/arch/arm/mach-bcm283x/init.c
+++ b/arch/arm/mach-bcm283x/init.c
@@ -7,8 +7,10 @@
  */
 
 #include <common.h>
+#include <dm/device.h>
+#include <fdt_support.h>
 
-unsigned long rpi_bcm283x_base;
+unsigned long rpi_bcm283x_base = 0x3f000000;
 
 int arch_cpu_init(void)
 {
@@ -19,10 +21,24 @@ int arch_cpu_init(void)
 
 int mach_cpu_init(void)
 {
-	rpi_bcm283x_base = CONFIG_BCM283x_BASE;
+	int ret, soc_offset;
+	u64 io_base, size;
+
+	/* Get IO base from device tree */
+	soc_offset = fdt_path_offset(gd->fdt_blob, "/soc");
+	if (soc_offset < 0)
+		return soc_offset;
+
+	ret = fdt_read_range((void *)gd->fdt_blob, soc_offset, 0, NULL,
+				&io_base, &size);
+	if (ret)
+		return ret;
+
+	rpi_bcm283x_base = io_base;
 
 	return 0;
 }
+
 #ifdef CONFIG_ARMV7_LPAE
 void enable_caches(void)
 {
-- 
2.24.0