ST-Ericsson's U8500 implementation. Register sysfs SoC interface, and export SoC ID, process and silicon revision number.
Signed-off-by: Maxime COQUELIN <[email protected]> --- 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 -- To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
