[PATCH 1/3] mpc85xx: i2c frequency

[Renaud Barbier]

To prepare for the introduction of the Freescale I2C driver, a function
that returns the system bus frequency used to compute the i2c bus frequency
is added.

Signed-off-by: Renaud Barbier <renaud.barbier at ge.com>
---
 arch/ppc/mach-mpc85xx/include/mach/clocks.h |    1 +
 arch/ppc/mach-mpc85xx/speed.c               |    9 +++++++++
 2 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/arch/ppc/mach-mpc85xx/include/mach/clocks.h b/arch/ppc/mach-mpc85xx/include/mach/clocks.h
index 2ab367b..e20d685 100644
--- a/arch/ppc/mach-mpc85xx/include/mach/clocks.h
+++ b/arch/ppc/mach-mpc85xx/include/mach/clocks.h
@@ -12,5 +12,6 @@ struct sys_info {
 
 unsigned long fsl_get_bus_freq(ulong dummy);
 unsigned long fsl_get_timebase_clock(void);
+unsigned long fsl_get_i2c_freq(void);
 void fsl_get_sys_info(struct sys_info *sysInfo);
 #endif /* __ASM_ARCH_CLOCKS_H */
diff --git a/arch/ppc/mach-mpc85xx/speed.c b/arch/ppc/mach-mpc85xx/speed.c
index 40d3664..fff2d22 100644
--- a/arch/ppc/mach-mpc85xx/speed.c
+++ b/arch/ppc/mach-mpc85xx/speed.c
@@ -102,3 +102,12 @@ unsigned long fsl_get_timebase_clock(void)
 
 	return (sysinfo.freqSystemBus + 4UL)/8UL;
 }
+
+unsigned long fsl_get_i2c_freq(void)
+{
+	struct sys_info sysinfo;
+
+	fsl_get_sys_info(&sysinfo);
+
+	return sysinfo.freqSystemBus / 2;
+}
-- 
1.7.1