MIPS: lantiq: adds static clock for PP32

The Lantiq DSL SoCs have an internal networking processor. Add code to read
the static clock rate.

Signed-off-by: John Crispin <blogic@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/4815/

6 files changed, 69 insertions, 10 deletions

diff --git a/arch/mips/include/asm/mach-lantiq/lantiq.h b/arch/mips/include/asm/mach-lantiq/lantiq.h
index 5e8a6e965756..76be7a09b9aa 100644
--- a/arch/mips/include/asm/mach-lantiq/lantiq.h
+++ b/arch/mips/include/asm/mach-lantiq/lantiq.h
@@ -41,6 +41,7 @@ extern void clk_deactivate(struct clk *clk);
 extern struct clk *clk_get_cpu(void);
 extern struct clk *clk_get_fpi(void);
 extern struct clk *clk_get_io(void);
+extern struct clk *clk_get_ppe(void);
 
 /* find out what bootsource we have */
 extern unsigned char ltq_boot_select(void);
diff --git a/arch/mips/lantiq/clk.c b/arch/mips/lantiq/clk.c
index ce2f129b081f..d90356004027 100644
--- a/arch/mips/lantiq/clk.c
+++ b/arch/mips/lantiq/clk.c
@@ -26,13 +26,15 @@
 #include "prom.h"
 
 /* lantiq socs have 3 static clocks */
-static struct clk cpu_clk_generic[3];
+static struct clk cpu_clk_generic[4];
 
-void clkdev_add_static(unsigned long cpu, unsigned long fpi, unsigned long io)
+void clkdev_add_static(unsigned long cpu, unsigned long fpi,
+                        unsigned long io, unsigned long ppe)
 {
         cpu_clk_generic[0].rate = cpu;
         cpu_clk_generic[1].rate = fpi;
         cpu_clk_generic[2].rate = io;
+        cpu_clk_generic[3].rate = ppe;
 }
 
 struct clk *clk_get_cpu(void)
@@ -51,6 +53,12 @@ struct clk *clk_get_io(void)
         return &cpu_clk_generic[2];
 }
 
+struct clk *clk_get_ppe(void)
+{
+        return &cpu_clk_generic[3];
+}
+EXPORT_SYMBOL_GPL(clk_get_ppe);
+
 static inline int clk_good(struct clk *clk)
 {
         return clk && !IS_ERR(clk);
diff --git a/arch/mips/lantiq/clk.h b/arch/mips/lantiq/clk.h
index fa670602b91b..77e4bdb1fe8c 100644
--- a/arch/mips/lantiq/clk.h
+++ b/arch/mips/lantiq/clk.h
@@ -27,12 +27,15 @@
 #define CLOCK_167M      166666667
 #define CLOCK_196_608M  196608000
 #define CLOCK_200M      200000000
+#define CLOCK_222M      222000000
+#define CLOCK_240M      240000000
 #define CLOCK_250M      250000000
 #define CLOCK_266M      266666666
 #define CLOCK_300M      300000000
 #define CLOCK_333M      333333333
 #define CLOCK_393M      393215332
 #define CLOCK_400M      400000000
+#define CLOCK_450M      450000000
 #define CLOCK_500M      500000000
 #define CLOCK_600M      600000000
 
@@ -64,15 +67,17 @@ struct clk {
 };
 
 extern void clkdev_add_static(unsigned long cpu, unsigned long fpi,
-                                unsigned long io);
+                                unsigned long io, unsigned long ppe);
 
 extern unsigned long ltq_danube_cpu_hz(void);
 extern unsigned long ltq_danube_fpi_hz(void);
+extern unsigned long ltq_danube_pp32_hz(void);
 
 extern unsigned long ltq_ar9_cpu_hz(void);
 extern unsigned long ltq_ar9_fpi_hz(void);
 
 extern unsigned long ltq_vr9_cpu_hz(void);
 extern unsigned long ltq_vr9_fpi_hz(void);
+extern unsigned long ltq_vr9_pp32_hz(void);
 
 #endif
diff --git a/arch/mips/lantiq/falcon/sysctrl.c b/arch/mips/lantiq/falcon/sysctrl.c
index 2d4ced332b37..ff4894a833ee 100644
--- a/arch/mips/lantiq/falcon/sysctrl.c
+++ b/arch/mips/lantiq/falcon/sysctrl.c
@@ -241,9 +241,9 @@ void __init ltq_soc_init(void)
 
         /* get our 3 static rates for cpu, fpi and io clocks */
         if (ltq_sys1_r32(SYS1_CPU0CC) & CPU0CC_CPUDIV)
-                clkdev_add_static(CLOCK_200M, CLOCK_100M, CLOCK_200M);
+                clkdev_add_static(CLOCK_200M, CLOCK_100M, CLOCK_200M, 0);
         else
-                clkdev_add_static(CLOCK_400M, CLOCK_100M, CLOCK_200M);
+                clkdev_add_static(CLOCK_400M, CLOCK_100M, CLOCK_200M, 0);
 
         /* add our clock domains */
         clkdev_add_sys("1d810000.gpio", SYSCTL_SYSETH, ACTS_P0);
diff --git a/arch/mips/lantiq/xway/clk.c b/arch/mips/lantiq/xway/clk.c
index 9aa17f79a742..1ab576dc9bd1 100644
--- a/arch/mips/lantiq/xway/clk.c
+++ b/arch/mips/lantiq/xway/clk.c
@@ -53,6 +53,29 @@ unsigned long ltq_danube_cpu_hz(void)
         }
 }
 
+unsigned long ltq_danube_pp32_hz(void)
+{
+        unsigned int clksys = (ltq_cgu_r32(CGU_SYS) >> 7) & 3;
+        unsigned long clk;
+
+        switch (clksys) {
+        case 1:
+                clk = CLOCK_240M;
+                break;
+        case 2:
+                clk = CLOCK_222M;
+                break;
+        case 3:
+                clk = CLOCK_133M;
+                break;
+        default:
+                clk = CLOCK_266M;
+                break;
+        }
+
+        return clk;
+}
+
 unsigned long ltq_ar9_sys_hz(void)
 {
         if (((ltq_cgu_r32(CGU_SYS) >> 3) & 0x3) == 0x2)
@@ -149,3 +172,23 @@ unsigned long ltq_vr9_fpi_hz(void)
 
         return clk;
 }
+
+unsigned long ltq_vr9_pp32_hz(void)
+{
+        unsigned int clksys = (ltq_cgu_r32(CGU_SYS) >> 16) & 3;
+        unsigned long clk;
+
+        switch (clksys) {
+        case 1:
+                clk = CLOCK_450M;
+                break;
+        case 2:
+                clk = CLOCK_300M;
+                break;
+        default:
+                clk = CLOCK_500M;
+                break;
+        }
+
+        return clk;
+}
diff --git a/arch/mips/lantiq/xway/sysctrl.c b/arch/mips/lantiq/xway/sysctrl.c
index 1aaa726aad47..3390fcd6ee56 100644
--- a/arch/mips/lantiq/xway/sysctrl.c
+++ b/arch/mips/lantiq/xway/sysctrl.c
@@ -356,14 +356,16 @@ void __init ltq_soc_init(void)
 
         if (of_machine_is_compatible("lantiq,ase")) {
                 if (ltq_cgu_r32(CGU_SYS) & (1 << 5))
-                        clkdev_add_static(CLOCK_266M, CLOCK_133M, CLOCK_133M);
+                        clkdev_add_static(CLOCK_266M, CLOCK_133M,
+                                                CLOCK_133M, CLOCK_266M);
                 else
-                        clkdev_add_static(CLOCK_133M, CLOCK_133M, CLOCK_133M);
+                        clkdev_add_static(CLOCK_133M, CLOCK_133M,
+                                                CLOCK_133M, CLOCK_133M);
                 clkdev_add_cgu("1e180000.etop", "ephycgu", CGU_EPHY),
                 clkdev_add_pmu("1e180000.etop", "ephy", 0, PMU_EPHY);
         } else if (of_machine_is_compatible("lantiq,vr9")) {
                 clkdev_add_static(ltq_vr9_cpu_hz(), ltq_vr9_fpi_hz(),
-                                ltq_vr9_fpi_hz());
+                                ltq_vr9_fpi_hz(), ltq_vr9_pp32_hz());
                 clkdev_add_pmu("1d900000.pcie", "phy", 1, PMU1_PCIE_PHY);
                 clkdev_add_pmu("1d900000.pcie", "bus", 0, PMU_PCIE_CLK);
                 clkdev_add_pmu("1d900000.pcie", "msi", 1, PMU1_PCIE_MSI);
@@ -376,10 +378,10 @@ void __init ltq_soc_init(void)
                                 PMU_PPE_QSB | PMU_PPE_TOP);
         } else if (of_machine_is_compatible("lantiq,ar9")) {
                 clkdev_add_static(ltq_ar9_cpu_hz(), ltq_ar9_fpi_hz(),
-                                ltq_ar9_fpi_hz());
+                                ltq_ar9_fpi_hz(), CLOCK_250M);
                 clkdev_add_pmu("1e180000.etop", "switch", 0, PMU_SWITCH);
         } else {
                 clkdev_add_static(ltq_danube_cpu_hz(), ltq_danube_fpi_hz(),
-                                ltq_danube_fpi_hz());
+                                ltq_danube_fpi_hz(), ltq_danube_pp32_hz());
         }
 }