[U-Boot] [PATCH 1/2] powerpc/85xx: Update timer-frequency prop in ptp_timer node of device tree

[Kumar Gala]

From: bhaskar upadhaya <Bhaskar.Upadhaya at freescale.com>

Fix up the device tree property associated with the IEEE 1588 timer
source frequency.  Currently we only support the IEEE 1588 timer source
being the internal eTSEC system clock (for those SoCs with IEEE 1588
support).  The eTSEC clock is ccb_clk/2.

Signed-off-by: Bhaskar Upadhaya <Bhaskar.Upadhaya at freescale.com>
Signed-off-by: Kumar Gala <galak at kernel.crashing.org>
---
 arch/powerpc/cpu/mpc85xx/fdt.c |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)

diff --git a/arch/powerpc/cpu/mpc85xx/fdt.c b/arch/powerpc/cpu/mpc85xx/fdt.c
index 6ed0284..642f6c5 100644
--- a/arch/powerpc/cpu/mpc85xx/fdt.c
+++ b/arch/powerpc/cpu/mpc85xx/fdt.c
@@ -486,4 +486,13 @@ void ft_cpu_setup(void *blob, bd_t *bd)
 #ifdef CONFIG_SYS_SRIO
 	ft_srio_setup(blob);
 #endif
+
+	/*
+	 * system-clock = CCB clock/2
+	 * Here gd->bus_clk = CCB clock
+	 * We are using the system clock as 1588 Timer reference
+	 * clock source select
+	 */
+	do_fixup_by_compat_u32(blob, "fsl,gianfar-ptp-timer",
+			"timer-frequency", gd->bus_clk/2, 1);
 }
-- 
1.7.2.3