[U-Boot] [PATCH v3 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 use the SoC compatible to decide which IO base address we use.

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

---

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  | 62 +++++++++++++++++++++++++++++++++--
 2 files changed, 60 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..d374fb60ba 100644
--- a/arch/arm/mach-bcm283x/init.c
+++ b/arch/arm/mach-bcm283x/init.c
@@ -7,8 +7,48 @@
  */
 
 #include <common.h>
+#include <dm/device.h>
 
-unsigned long rpi_bcm283x_base;
+#define PDATA_BCM2835	0
+#define PDATA_BCM2836	1
+#define PDATA_BCM2837	2
+#define PDATA_BCM2711	3
+
+unsigned long rpi_bcm283x_base = 0x3f000000;
+
+struct bcm283x_pdata {
+	unsigned long io_base;
+};
+
+struct bcm283x_pdata pdata_bcm283x[] = {
+	[PDATA_BCM2835] = {
+		.io_base = 0x20000000,
+	},
+	[PDATA_BCM2836] = {
+		.io_base = 0x3f000000,
+	},
+#ifdef CONFIG_ARM64
+	[PDATA_BCM2837] = {
+		.io_base = 0x3f000000,
+	},
+	[PDATA_BCM2711] = {
+		.io_base = 0xfe000000,
+	},
+#endif
+};
+
+/*
+ * I/O address space varies on different chip versions.
+ * We set the base address by inspecting the DTB.
+ */
+static const struct udevice_id board_ids[] = {
+	{ .compatible = "brcm,bcm2835", .data = PDATA_BCM2835},
+	{ .compatible = "brcm,bcm2836", .data = PDATA_BCM2836},
+	{ .compatible = "brcm,bcm2837", .data = PDATA_BCM2837},
+	{ .compatible = "brcm,bcm2838", .data = PDATA_BCM2711},
+	{ .compatible = "brcm,bcm2711", .data = PDATA_BCM2711},
+	{ },
+};
 
 int arch_cpu_init(void)
 {
@@ -19,10 +59,28 @@ int arch_cpu_init(void)
 
 int mach_cpu_init(void)
 {
-	rpi_bcm283x_base = CONFIG_BCM283x_BASE;
+	const struct udevice_id *of_match = board_ids;
+	int ret;
+
+	rpi_bcm283x_base = 0;
+
+	while (of_match->compatible) {
+		struct bcm283x_pdata pdat;
+
+		ret = fdt_node_check_compatible(gd->fdt_blob, 0,
+						of_match->compatible);
+		if (!ret) {
+			pdat = pdata_bcm283x[of_match->data];
+			rpi_bcm283x_base = pdat.io_base;
+			break;
+		}
+
+		of_match++;
+	}
 
 	return 0;
 }
+
 #ifdef CONFIG_ARMV7_LPAE
 void enable_caches(void)
 {
-- 
2.24.0