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| author | James Yang <James.Yang@freescale.com> | 2008-02-08 18:05:08 -0600 |
|---|---|---|
| committer | Andrew Fleming-AFLEMING <afleming@freescale.com> | 2008-03-26 11:43:04 -0500 |
| commit | a3e77fa5359b3f9f59e4e946b46d57a53057cc85 (patch) | |
| tree | 3bcc915dc6f1899b5e388793b1945c77fef3f16e | |
| parent | e9ea679918fbc9a53fa2f2a904aac874ea736036 (diff) | |
| download | u-boot-imx-a3e77fa5359b3f9f59e4e946b46d57a53057cc85.zip u-boot-imx-a3e77fa5359b3f9f59e4e946b46d57a53057cc85.tar.gz u-boot-imx-a3e77fa5359b3f9f59e4e946b46d57a53057cc85.tar.bz2 | |
85xx: Speed up get_ddr_freq() and get_bus_freq()
get_ddr_freq() and get_bus_freq() used get_sys_info() each time they were
called. However, get_sys_info() recalculates extraneous information when
called each time. Have get_ddr_freq() and get_bus_freq() return memoized
values from global_data instead.
Signed-off-by: James Yang <James.Yang@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
| -rw-r--r-- | cpu/mpc85xx/speed.c | 21 | ||||
| -rw-r--r-- | include/asm-ppc/global_data.h | 2 |
2 files changed, 5 insertions, 18 deletions
diff --git a/cpu/mpc85xx/speed.c b/cpu/mpc85xx/speed.c index 952f30c..d90d397 100644 --- a/cpu/mpc85xx/speed.c +++ b/cpu/mpc85xx/speed.c @@ -48,6 +48,8 @@ void get_sys_info (sys_info_t * sysInfo) * overflow for processor speeds above 2GHz */ half_freqSystemBus = sysInfo->freqSystemBus/2; sysInfo->freqProcessor = e500_ratio*half_freqSystemBus; + + /* Note: freqDDRBus is the MCLK frequency, not the data rate. */ sysInfo->freqDDRBus = sysInfo->freqSystemBus; #ifdef CONFIG_DDR_CLK_FREQ @@ -75,6 +77,7 @@ int get_clocks (void) get_sys_info (&sys_info); gd->cpu_clk = sys_info.freqProcessor; gd->bus_clk = sys_info.freqSystemBus; + gd->mem_clk = sys_info.freqDDRBus; gd->i2c1_clk = sys_info.freqSystemBus; gd->i2c2_clk = sys_info.freqSystemBus; @@ -96,14 +99,7 @@ int get_clocks (void) *********************************************/ ulong get_bus_freq (ulong dummy) { - ulong val; - - sys_info_t sys_info; - - get_sys_info (&sys_info); - val = sys_info.freqSystemBus; - - return val; + return gd->bus_clk; } /******************************************** @@ -112,12 +108,5 @@ ulong get_bus_freq (ulong dummy) *********************************************/ ulong get_ddr_freq (ulong dummy) { - ulong val; - - sys_info_t sys_info; - - get_sys_info (&sys_info); - val = sys_info.freqDDRBus; - - return val; + return gd->mem_clk; } diff --git a/include/asm-ppc/global_data.h b/include/asm-ppc/global_data.h index ff6624a..b43dba3 100644 --- a/include/asm-ppc/global_data.h +++ b/include/asm-ppc/global_data.h @@ -52,9 +52,7 @@ typedef struct global_data { unsigned long scc_clk; unsigned long brg_clk; #endif -#if defined(CONFIG_MPC7448HPC2) unsigned long mem_clk; -#endif #if defined(CONFIG_MPC83XX) /* There are other clocks in the MPC83XX */ u32 csb_clk; |