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| author | Hauke Mehrtens <hauke@openwrt.org> | 2012-11-25 16:38:16 +0000 |
|---|---|---|
| committer | Hauke Mehrtens <hauke@openwrt.org> | 2012-11-25 16:38:16 +0000 |
| commit | 8cb000c62fc7c6d478946ff36a666267df9ae60d (patch) | |
| tree | dd41fdbfa3ad5639067c6e8df7381737ae26fa7a | |
| parent | 7769b76a026e8bd3156aeac2bf90cd17d2886861 (diff) | |
| download | upstream-8cb000c62fc7c6d478946ff36a666267df9ae60d.tar.gz upstream-8cb000c62fc7c6d478946ff36a666267df9ae60d.tar.bz2 upstream-8cb000c62fc7c6d478946ff36a666267df9ae60d.zip | |
brcm47xx: fix cpu clock detection on ASUS WL-520gU
The ASUS WL-520gU and some other similar Asus devices have a BCM5354
running at 200MHZ and not at 240 which is the default for this SoC.
This fixes #4083.
Backport of r34325.
git-svn-id: svn://svn.openwrt.org/openwrt/branches/attitude_adjustment@34377 3c298f89-4303-0410-b956-a3cf2f4a3e73
| -rw-r--r-- | target/linux/brcm47xx/patches-3.3/520-MIPS-BCM47XX-fix-time-for-WL520G-and-other-200-MHz-C.patch | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/target/linux/brcm47xx/patches-3.3/520-MIPS-BCM47XX-fix-time-for-WL520G-and-other-200-MHz-C.patch b/target/linux/brcm47xx/patches-3.3/520-MIPS-BCM47XX-fix-time-for-WL520G-and-other-200-MHz-C.patch new file mode 100644 index 0000000000..2ae45e8f44 --- /dev/null +++ b/target/linux/brcm47xx/patches-3.3/520-MIPS-BCM47XX-fix-time-for-WL520G-and-other-200-MHz-C.patch @@ -0,0 +1,44 @@ +--- a/arch/mips/bcm47xx/time.c ++++ b/arch/mips/bcm47xx/time.c +@@ -27,10 +27,14 @@ + #include <linux/ssb/ssb.h> + #include <asm/time.h> + #include <bcm47xx.h> ++#include <nvram.h> + + void __init plat_time_init(void) + { + unsigned long hz = 0; ++ u16 chip_id = 0; ++ char buf[10]; ++ int len; + + /* + * Use deterministic values for initial counter interrupt +@@ -43,15 +47,26 @@ void __init plat_time_init(void) + #ifdef CONFIG_BCM47XX_SSB + case BCM47XX_BUS_TYPE_SSB: + hz = ssb_cpu_clock(&bcm47xx_bus.ssb.mipscore) / 2; ++ chip_id = bcm47xx_bus.ssb.chip_id; + break; + #endif + #ifdef CONFIG_BCM47XX_BCMA + case BCM47XX_BUS_TYPE_BCMA: + hz = bcma_cpu_clock(&bcm47xx_bus.bcma.bus.drv_mips) / 2; ++ chip_id = bcm47xx_bus.bcma.bus.chipinfo.id; + break; + #endif + } + ++ if (chip_id == 0x5354) { ++ len = nvram_getenv("clkfreq", buf, sizeof(buf)); ++ if (len >= 0 && !strncmp(buf, "200", 4)) ++ hz = 100000000; ++ len = nvram_getenv("hardware_version", buf, sizeof(buf)); ++ if (len >= 0 && !strncmp(buf, "WL520G", 6)) ++ hz = 100000000; ++ ++ } + if (!hz) + hz = 100000000; + |