From: Renaud Barbier <renaud.barbier@ge.com>
To: barebox@lists.infradead.org
Subject: [PATCH 1/3] mpc85xx: i2c frequency
Date: Wed, 22 Aug 2012 16:08:51 +0100 [thread overview]
Message-ID: <1345648133-31721-2-git-send-email-renaud.barbier@ge.com> (raw)
In-Reply-To: <1345648133-31721-1-git-send-email-renaud.barbier@ge.com>
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@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
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next prev parent reply other threads:[~2012-08-22 15:09 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-22 15:08 [PATCH 0/3] Freescale I2C driver Renaud Barbier
2012-08-22 15:08 ` Renaud Barbier [this message]
2012-08-22 15:08 ` [PATCH 2/3] " Renaud Barbier
2012-08-28 9:19 ` Sascha Hauer
2012-08-29 13:59 ` Renaud Barbier
2012-08-29 14:01 ` Sascha Hauer
2012-08-22 15:08 ` [PATCH 3/3] ppc: p2020rdb i2c support Renaud Barbier
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