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authorJayachandran C <jayachandranc@netlogicmicro.com>2011-11-16 00:21:29 +0000
committerRalf Baechle <ralf@linux-mips.org>2011-12-07 22:04:56 +0000
commit2aa54b2009bb4f85cdc42d16dde18093dd832a31 (patch)
tree0e9adc109b4c8bc8e2cfe983bef40380b72c12bf /arch/mips/netlogic
parent66d29985fab8207b1b2c03ac34a2c294c5b47a30 (diff)
downloadblackbird-op-linux-2aa54b2009bb4f85cdc42d16dde18093dd832a31.tar.gz
blackbird-op-linux-2aa54b2009bb4f85cdc42d16dde18093dd832a31.zip
MIPS: Netlogic: Add support for XLP 3XX cores
Add new processor ID to asm/cpu.h and kernel/cpu-probe.c. Update to new CPU frequency detection code which works on XLP 3XX and 8XX. Signed-off-by: Jayachandran C <jayachandranc@netlogicmicro.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/2971/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/netlogic')
-rw-r--r--arch/mips/netlogic/xlp/nlm_hal.c26
1 files changed, 16 insertions, 10 deletions
diff --git a/arch/mips/netlogic/xlp/nlm_hal.c b/arch/mips/netlogic/xlp/nlm_hal.c
index 885f6878594a..9428e7125fed 100644
--- a/arch/mips/netlogic/xlp/nlm_hal.c
+++ b/arch/mips/netlogic/xlp/nlm_hal.c
@@ -86,20 +86,26 @@ int nlm_irt_to_irq(int irt)
}
}
-unsigned int nlm_get_cpu_frequency(void)
+unsigned int nlm_get_core_frequency(int core)
{
- unsigned int pll_divf, pll_divr, dfs_div, denom;
- unsigned int val;
+ unsigned int pll_divf, pll_divr, dfs_div, ext_div;
+ unsigned int rstval, dfsval, denom;
uint64_t num;
- val = nlm_read_sys_reg(nlm_sys_base, SYS_POWER_ON_RESET_CFG);
- pll_divf = (val >> 10) & 0x7f;
- pll_divr = (val >> 8) & 0x3;
- dfs_div = (val >> 17) & 0x3;
+ rstval = nlm_read_sys_reg(nlm_sys_base, SYS_POWER_ON_RESET_CFG);
+ dfsval = nlm_read_sys_reg(nlm_sys_base, SYS_CORE_DFS_DIV_VALUE);
+ pll_divf = ((rstval >> 10) & 0x7f) + 1;
+ pll_divr = ((rstval >> 8) & 0x3) + 1;
+ ext_div = ((rstval >> 30) & 0x3) + 1;
+ dfs_div = ((dfsval >> (core * 4)) & 0xf) + 1;
- num = pll_divf + 1;
- denom = 3 * (pll_divr + 1) * (1 << (dfs_div + 1));
- num = num * 800000000ULL;
+ num = 800000000ULL * pll_divf;
+ denom = 3 * pll_divr * ext_div * dfs_div;
do_div(num, denom);
return (unsigned int)num;
}
+
+unsigned int nlm_get_cpu_frequency(void)
+{
+ return nlm_get_core_frequency(0);
+}
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