Get board revision information from devicetree's /board-revision property. When using devicetree's board-revision property board revision will be free form string as defined by device/SoM manufacturer.
In case it is not available fallback to using ATAGs and format it as 4 digit hex string as previously. Signed-off-by: Vesa Jääskeläinen <[email protected]> --- arch/arm/kernel/setup.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c index 4e80bf7..325604e 100644 --- a/arch/arm/kernel/setup.c +++ b/arch/arm/kernel/setup.c @@ -97,6 +97,8 @@ unsigned int __atags_pointer __initdata; unsigned int system_rev; EXPORT_SYMBOL(system_rev); +static const char *board_revision; + const char *system_serial; EXPORT_SYMBOL(system_serial); @@ -940,6 +942,11 @@ static int __init init_machine_late(void) &system_serial); if (ret) system_serial = NULL; + + ret = of_property_read_string(root, "board-revision", + &board_revision); + if (ret) + board_revision = NULL; } if (!system_serial) @@ -947,6 +954,9 @@ static int __init init_machine_late(void) system_serial_high, system_serial_low); + if (!board_revision) + board_revision = kasprintf(GFP_KERNEL, "%04x", system_rev); + return 0; } late_initcall(init_machine_late); @@ -1271,7 +1281,7 @@ static int c_show(struct seq_file *m, void *v) } seq_printf(m, "Hardware\t: %s\n", machine_name); - seq_printf(m, "Revision\t: %04x\n", system_rev); + seq_printf(m, "Revision\t: %s\n", board_revision); seq_printf(m, "Serial\t\t: %s\n", system_serial); return 0; -- 2.1.4
