ST-Ericsson's U8500 implementation.
Register sysfs SoC interface, and export SoC ID, process and silicon revision
number.
Signed-off-by: Maxime COQUELIN <maxime.coquelin-nonst@xxxxxxxxxxxxxx>
---
arch/arm/mach-ux500/id.c | 96 ++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 96 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-ux500/id.c b/arch/arm/mach-ux500/id.c
index d35122e..0d41c77 100644
--- a/arch/arm/mach-ux500/id.c
+++ b/arch/arm/mach-ux500/id.c
@@ -8,6 +8,8 @@
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/io.h>
+#include <linux/sys_soc.h>
+#include <linux/slab.h>
#include <asm/cputype.h>
#include <asm/tlbflush.h>
@@ -105,3 +107,97 @@ void __init ux500_map_io(void)
ux500_print_soc_info(asicid);
}
+
+
+#ifdef CONFIG_SYS_SOC
+#define U8500_BB_UID_BASE (U8500_BACKUPRAM1_BASE + 0xFC0)
+#define U8500_BB_UID_LENGTH 5
+
+#define UX500_SOC_INFO_SZ 64
+
+static char soc_id[UX500_SOC_INFO_SZ];
+static char revision[UX500_SOC_INFO_SZ];
+static char process[UX500_SOC_INFO_SZ];
+
+static char *ux500_get_soc_id(struct sys_soc_info *si)
+{
+ void __iomem *uid_base = __io_address(U8500_BB_UID_BASE);
+ int i, sz = 0;
+
+ if (dbx500_partnumber() == 0x8500) {
+ for (i = 0; i < U8500_BB_UID_LENGTH; i++)
+ sz += snprintf(soc_id + sz, UX500_SOC_INFO_SZ - sz, "%08x",
+ readl(uid_base + i * sizeof(u32)));
+ }
+ else {
+ /* Don't know where it is located for U5500 */
+ sprintf(soc_id, "N/A");
+ }
+
+ /*
+ * As this key will never change, no need to read it anymore.
+ */
+ si->info = soc_id;
+ return soc_id;
+}
+
+static char *ux500_get_revision(struct sys_soc_info *si)
+{
+ unsigned int rev = dbx500_revision();
+
+ if (rev == 0x01)
+ sprintf(revision, "%s", "ED");
+ else if (rev >= 0xA0)
+ sprintf(revision, "%d.%d" , (rev >> 4) - 0xA + 1, rev & 0xf);
+ else
+ sprintf(revision, "%s", "Unknown");
+
+ /*
+ * As this key will never change, no need to read it anymore.
+ */
+ si->info = revision;
+ return revision;
+}
+
+static char *ux500_get_process(struct sys_soc_info *si)
+{
+ if (dbx500_id.process == 0x00)
+ sprintf(process, "Standard");
+ else
+ sprintf(process, "%02xnm", dbx500_id.process);
+
+ /*
+ * As this key will never change, no need to read it anymore.
+ */
+ si->info = process;
+ return process;
+}
+
+static struct sys_soc_info soc_info[] = {
+ [0] = {
+ .name = "soc_id",
+ .get_info = ux500_get_soc_id,
+ },
+ [1] = {
+ .name = "revision",
+ .get_info = ux500_get_revision,
+ },
+ [2] = {
+ .name = "process",
+ .get_info = ux500_get_process,
+ },
+};
+
+static int __init ux500_sys_soc_init(void)
+{
+ char part_number[8];
+
+ sprintf(part_number, "DB%4x", dbx500_partnumber());
+ register_sys_soc(part_number, soc_info, ARRAY_SIZE(soc_info));
+
+ return 0;
+}
+
+module_init(ux500_sys_soc_init);
+#endif
+
--
1.7.1
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