5 files changed, 45 insertions, 5 deletions

diff --git a/include/asm-arm/arch-ns9xxx/board.h b/include/asm-arm/arch-ns9xxx/board.h
index 91dc8fb1027f..716f34fdb716 100644
--- a/include/asm-arm/arch-ns9xxx/board.h
+++ b/include/asm-arm/arch-ns9xxx/board.h
@@ -15,4 +15,6 @@
 
 #define board_is_a9m9750dev()   (machine_is_cc9p9360dev())
 
+#define board_is_jscc9p9360()   (machine_is_cc9p9360js())
+
 #endif /* ifndef __ASM_ARCH_BOARD_H */
diff --git a/include/asm-arm/arch-ns9xxx/clock.h b/include/asm-arm/arch-ns9xxx/clock.h
index a7c5ab3d9011..bf30cbdcc2bf 100644
--- a/include/asm-arm/arch-ns9xxx/clock.h
+++ b/include/asm-arm/arch-ns9xxx/clock.h
@@ -11,13 +11,43 @@
 #ifndef __ASM_ARCH_CLOCK_H
 #define __ASM_ARCH_CLOCK_H
 
+#include <asm/arch-ns9xxx/regs-sys.h>
+
+#define CRYSTAL 29491200 /* Hz */
+
+/* The HRM calls this value f_vco */
 static inline u32 ns9xxx_systemclock(void) __attribute__((const));
 static inline u32 ns9xxx_systemclock(void)
 {
+        u32 pll = SYS_PLL;
+
         /*
-         * This should be a multiple of HZ * TIMERCLOCKSELECT (in time.c)
+         * The system clock should be a multiple of HZ * TIMERCLOCKSELECT (in
+         * time.c).
+         *
+         * The following values are given:
+         *   - TIMERCLOCKSELECT == 2^i for an i in {0 .. 6}
+         *   - CRYSTAL == 29491200 == 2^17 * 3^2 * 5^2
+         *   - ND in {0 .. 31}
+         *   - FS in {0 .. 3}
+         *
+         * Assuming the worst, we consider:
+         *   - TIMERCLOCKSELECT == 64
+         *   - ND == 0
+         *   - FS == 3
+         *
+         * So HZ should be a divisor of:
+         *      (CRYSTAL * (ND + 1) >> FS) / TIMERCLOCKSELECT
+         *   == (2^17 * 3^2 * 5^2 * 1 >> 3) / 64
+         *   == 2^8 * 3^2 * 5^2
+         *   == 57600
+         *
+         * Currently HZ is defined to be 100 for this platform.
+         *
+         * Fine.
          */
-        return 353894400;
+        return CRYSTAL * (REGGET(pll, SYS_PLL, ND) + 1)
+                >> REGGET(pll, SYS_PLL, FS);
 }
 
 static inline u32 ns9xxx_cpuclock(void) __attribute__((const));
diff --git a/include/asm-arm/arch-ns9xxx/hardware.h b/include/asm-arm/arch-ns9xxx/hardware.h
index 6819da7c48d4..25600554c4fe 100644
--- a/include/asm-arm/arch-ns9xxx/hardware.h
+++ b/include/asm-arm/arch-ns9xxx/hardware.h
@@ -51,8 +51,9 @@
                        ~(__REGVAL(reg ## _ ## field, value))))          \
                   | (__REGVAL(reg ## _ ## field, value))))
 
-#  define REGGET(reg, field)                                            \
-        ((reg & (reg ## _ ## field)) / (field & (-field)))
+#  define REGGET(var, reg, field)                                       \
+        ((var & (reg ## _ ## field)) /                                  \
+         ((reg ## _ ## field) & (-(reg ## _ ## field))))
 
 #else
 
diff --git a/include/asm-arm/arch-ns9xxx/processor.h b/include/asm-arm/arch-ns9xxx/processor.h
index 716c106ac0bf..223e51b8e104 100644
--- a/include/asm-arm/arch-ns9xxx/processor.h
+++ b/include/asm-arm/arch-ns9xxx/processor.h
@@ -13,6 +13,7 @@
 
 #include <asm/mach-types.h>
 
-#define processor_is_ns9360()   (machine_is_cc9p9360dev())
+#define processor_is_ns9360()   (machine_is_cc9p9360dev()               \
+                || machine_is_cc9p9360js())
 
 #endif /* ifndef __ASM_ARCH_PROCESSOR_H */
diff --git a/include/asm-arm/arch-ns9xxx/regs-sys.h b/include/asm-arm/arch-ns9xxx/regs-sys.h
index 8162a50bb273..a42546aeb92a 100644
--- a/include/asm-arm/arch-ns9xxx/regs-sys.h
+++ b/include/asm-arm/arch-ns9xxx/regs-sys.h
@@ -48,6 +48,12 @@
 /* PLL Configuration register */
 #define SYS_PLL         __REG(0xa0900188)
 
+/* PLL FS status */
+#define SYS_PLL_FS              __REGBITS(24, 23)
+
+/* PLL ND status */
+#define SYS_PLL_ND              __REGBITS(20, 16)
+
 /* PLL Configuration register: PLL SW change */
 #define SYS_PLL_SWC             __REGBIT(15)
 #define SYS_PLL_SWC_NO                  __REGVAL(SYS_PLL_SWC, 0)