ARM: mvebu: Add a SOC bus device entry

Add the SoC Family, device ID and revision to /sys/bus/soc.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lkml.kernel.org/r/1393955507-26436-1-git-send-email-andrew@lunn.ch
Signed-off-by: Jason Cooper <jason@lakedaemon.net>

2 files changed, 31 insertions, 0 deletions

diff --git a/arch/arm/mach-mvebu/Kconfig b/arch/arm/mach-mvebu/Kconfig
index 3f73eecbcfb0..475cf8a6d165 100644
--- a/arch/arm/mach-mvebu/Kconfig
+++ b/arch/arm/mach-mvebu/Kconfig
@@ -6,6 +6,7 @@ config ARCH_MVEBU
         select IRQ_DOMAIN
         select PINCTRL
         select PLAT_ORION
+        select SOC_BUS
         select MVEBU_MBUS
         select ZONE_DMA if ARM_LPAE
         select ARCH_REQUIRE_GPIOLIB
diff --git a/arch/arm/mach-mvebu/mvebu-soc-id.c b/arch/arm/mach-mvebu/mvebu-soc-id.c
index f3d4cf53f746..874a7504818e 100644
--- a/arch/arm/mach-mvebu/mvebu-soc-id.c
+++ b/arch/arm/mach-mvebu/mvebu-soc-id.c
@@ -23,6 +23,8 @@
 #include <linux/kernel.h>
 #include <linux/of.h>
 #include <linux/of_address.h>
+#include <linux/slab.h>
+#include <linux/sys_soc.h>
 #include "mvebu-soc-id.h"
 
 #define PCIE_DEV_ID_OFF         0x0
@@ -118,3 +120,31 @@ clk_err:
 }
 core_initcall(mvebu_soc_id_init);
 
+static int __init mvebu_soc_device(void)
+{
+        struct soc_device_attribute *soc_dev_attr;
+        struct soc_device *soc_dev;
+
+        /* Also protects against running on non-mvebu systems */
+        if (!is_id_valid)
+                return 0;
+
+        soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
+        if (!soc_dev_attr)
+                return -ENOMEM;
+
+        soc_dev_attr->family = kasprintf(GFP_KERNEL, "Marvell");
+        soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%X", soc_rev);
+        soc_dev_attr->soc_id = kasprintf(GFP_KERNEL, "%X", soc_dev_id);
+
+        soc_dev = soc_device_register(soc_dev_attr);
+        if (IS_ERR(soc_dev)) {
+                kfree(soc_dev_attr->family);
+                kfree(soc_dev_attr->revision);
+                kfree(soc_dev_attr->soc_id);
+                kfree(soc_dev_attr);
+        }
+
+        return 0;
+}
+postcore_initcall(mvebu_soc_device);