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[PATCH 11/12] MIPS: Netlogic: Add support for XLP 3XX cores

To: <linux-mips@linux-mips.org>, <ralf@linux-mips.org>
Subject: [PATCH 11/12] MIPS: Netlogic: Add support for XLP 3XX cores
From: Jayachandran C <jayachandranc@netlogicmicro.com>
Date: Fri, 11 Nov 2011 17:10:49 +0530
In-reply-to: <cover.1321010998.git.jayachandranc@netlogicmicro.com>
References: <cover.1321010998.git.jayachandranc@netlogicmicro.com>
Sender: linux-mips-bounce@linux-mips.org
User-agent: Mutt/1.5.21 (2010-09-15)
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>
---
 arch/mips/include/asm/cpu.h      |    4 +++-
 arch/mips/kernel/cpu-probe.c     |    3 ++-
 arch/mips/netlogic/xlp/nlm_hal.c |   26 ++++++++++++++++----------
 3 files changed, 21 insertions(+), 12 deletions(-)

diff --git a/arch/mips/include/asm/cpu.h b/arch/mips/include/asm/cpu.h
index 54e35ad..f9fa2a4 100644
--- a/arch/mips/include/asm/cpu.h
+++ b/arch/mips/include/asm/cpu.h
@@ -171,7 +171,9 @@
 #define PRID_IMP_NETLOGIC_XLS404B      0x4f00
 #define PRID_IMP_NETLOGIC_AU13XX       0x8000
 
-#define PRID_IMP_NETLOGIC_XLP832       0x1000
+#define PRID_IMP_NETLOGIC_XLP8XX       0x1000
+#define PRID_IMP_NETLOGIC_XLP3XX       0x1100
+
 /*
  * Definitions for 7:0 on legacy processors
  */
diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c
index 906e916..0bab464 100644
--- a/arch/mips/kernel/cpu-probe.c
+++ b/arch/mips/kernel/cpu-probe.c
@@ -1032,7 +1032,8 @@ static inline void cpu_probe_netlogic(struct cpuinfo_mips 
*c, int cpu)
                        MIPS_CPU_LLSC);
 
        switch (c->processor_id & 0xff00) {
-       case PRID_IMP_NETLOGIC_XLP832:
+       case PRID_IMP_NETLOGIC_XLP8XX:
+       case PRID_IMP_NETLOGIC_XLP3XX:
                c->cputype = CPU_XLP;
                __cpu_name[cpu] = "Netlogic XLP";
                break;
diff --git a/arch/mips/netlogic/xlp/nlm_hal.c b/arch/mips/netlogic/xlp/nlm_hal.c
index 885f687..9428e71 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);
+}
-- 
1.7.5.4


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