x86: Set up a shared syscon numbering schema
Each system controller can have a number to identify it. It can then be
accessed using syscon_get_by_driver_data(). Put this in a shared header
file and update the only current user.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/arch/x86/cpu/ivybridge/early_me.c b/arch/x86/cpu/ivybridge/early_me.c
index 612c910..f0d6899 100644
--- a/arch/x86/cpu/ivybridge/early_me.c
+++ b/arch/x86/cpu/ivybridge/early_me.c
@@ -10,6 +10,7 @@
#include <dm.h>
#include <errno.h>
#include <asm/pci.h>
+#include <asm/cpu.h>
#include <asm/processor.h>
#include <asm/arch/me.h>
#include <asm/arch/pch.h>
@@ -189,7 +190,7 @@
}
static const struct udevice_id ivybridge_syscon_ids[] = {
- { .compatible = "intel,me", },
+ { .compatible = "intel,me", .data = X86_SYSCON_ME },
{ }
};
diff --git a/arch/x86/cpu/ivybridge/sdram.c b/arch/x86/cpu/ivybridge/sdram.c
index 3e5be4e..e23c422 100644
--- a/arch/x86/cpu/ivybridge/sdram.c
+++ b/arch/x86/cpu/ivybridge/sdram.c
@@ -18,6 +18,8 @@
#include <rtc.h>
#include <spi.h>
#include <spi_flash.h>
+#include <syscon.h>
+#include <asm/cpu.h>
#include <asm/processor.h>
#include <asm/gpio.h>
#include <asm/global_data.h>
@@ -739,11 +741,9 @@
return ret;
if (!dev)
return -ENODEV;
- ret = uclass_first_device(UCLASS_SYSCON, &me_dev);
+ ret = syscon_get_by_driver_data(X86_SYSCON_ME, &me_dev);
if (ret)
return ret;
- if (!me_dev)
- return -ENODEV;
debug("Boot mode %d\n", gd->arch.pei_boot_mode);
debug("mrc_input %p\n", pei_data.mrc_input);
pei_data.boot_mode = gd->arch.pei_boot_mode;
diff --git a/arch/x86/include/asm/cpu.h b/arch/x86/include/asm/cpu.h
index c70183c..76cdf47 100644
--- a/arch/x86/include/asm/cpu.h
+++ b/arch/x86/include/asm/cpu.h
@@ -45,6 +45,15 @@
GDT_BASE_HIGH_MASK = 0xf,
};
+/*
+ * System controllers in an x86 system. We mostly need to just find these and
+ * use them on PCI. At some point these might have their own uclass.
+ */
+enum {
+ X86_NONE,
+ X86_SYSCON_ME, /* Intel Management Engine */
+};
+
struct cpuid_result {
uint32_t eax;
uint32_t ebx;