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MIPS: BCM63XX: Use the Chip ID register for identifying the SoC

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Newer BCM63XX SoCs use virtually the same CPU ID, differing only in the
revision bits. But since they all have the Chip ID register at the same
location, we can use that to identify the SoC we are running on.

Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: Maxime Bizon <mbizon@freebox.fr>
Cc: Florian Fainelli <florian@openwrt.org>
Cc: Kevin Cernekee <cernekee@gmail.com>
Patchwork: https://patchwork.linux-mips.org/patch/3955/
Reviewed-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Jonas Gorski 2012-07-24 16:33:12 +02:00 committed by Ralf Baechle
parent aaf3fedb56
commit 288752a8aa
1 changed files with 12 additions and 8 deletions
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20
arch/mips/bcm63xx/cpu.c
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@ -228,17 +228,21 @@ void __init bcm63xx_cpu_init(void)
bcm63xx_irqs = bcm6345_irqs;
break;
case CPU_BMIPS4350:
switch (read_c0_prid() & 0xf0) {
case 0x10:
if ((read_c0_prid() & 0xf0) == 0x10) {
expected_cpu_id = BCM6358_CPU_ID;
bcm63xx_regs_base = bcm6358_regs_base;
bcm63xx_irqs = bcm6358_irqs;
break;
case 0x30:
expected_cpu_id = BCM6368_CPU_ID;
bcm63xx_regs_base = bcm6368_regs_base;
bcm63xx_irqs = bcm6368_irqs;
break;
} else {
/* all newer chips have the same chip id location */
u16 chip_id = bcm_readw(BCM_6368_PERF_BASE);
switch (chip_id) {
case BCM6368_CPU_ID:
expected_cpu_id = BCM6368_CPU_ID;
bcm63xx_regs_base = bcm6368_regs_base;
bcm63xx_irqs = bcm6368_irqs;
break;
}
}
break;
}