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@xxxxxx>
---
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
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