Patchwork [U-Boot,03/28] powerpc/85xx: Add determining and report IFC frequency

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Submitter York Sun
Date Oct. 8, 2012, 5:44 p.m.
Message ID <1349718271-26503-3-git-send-email-yorksun@freescale.com>
Download mbox | patch
Permalink /patch/190065/
State Accepted, archived
Delegated to: Andy Fleming
Headers show

Comments

York Sun - Oct. 8, 2012, 5:44 p.m.
From: Kumar Gala <galak@kernel.crashing.org>

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
---
 arch/powerpc/cpu/mpc85xx/cpu.c   |    4 ++++
 arch/powerpc/cpu/mpc85xx/speed.c |   11 +++++++++++
 2 files changed, 15 insertions(+)

Patch

diff --git a/arch/powerpc/cpu/mpc85xx/cpu.c b/arch/powerpc/cpu/mpc85xx/cpu.c
index 5ddb294..515dd41 100644
--- a/arch/powerpc/cpu/mpc85xx/cpu.c
+++ b/arch/powerpc/cpu/mpc85xx/cpu.c
@@ -181,6 +181,10 @@  int checkcpu (void)
 	}
 #endif
 
+#if defined(CONFIG_FSL_IFC)
+	printf("IFC:%-4s MHz\n", strmhz(buf1, sysinfo.freqLocalBus));
+#endif
+
 #ifdef CONFIG_CPM2
 	printf("CPM:   %s MHz\n", strmhz(buf1, sysinfo.freqSystemBus));
 #endif
diff --git a/arch/powerpc/cpu/mpc85xx/speed.c b/arch/powerpc/cpu/mpc85xx/speed.c
index abfeb26..cbdf293 100644
--- a/arch/powerpc/cpu/mpc85xx/speed.c
+++ b/arch/powerpc/cpu/mpc85xx/speed.c
@@ -39,6 +39,10 @@  DECLARE_GLOBAL_DATA_PTR;
 void get_sys_info (sys_info_t * sysInfo)
 {
 	volatile ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
+#ifdef CONFIG_FSL_IFC
+	struct fsl_ifc *ifc_regs = (void *)CONFIG_SYS_IFC_ADDR;
+	u32 ccr;
+#endif
 #ifdef CONFIG_FSL_CORENET
 	volatile ccsr_clk_t *clk = (void *)(CONFIG_SYS_FSL_CORENET_CLK_ADDR);
 	unsigned int cpu;
@@ -228,6 +232,13 @@  void get_sys_info (sys_info_t * sysInfo)
 		sysInfo->freqLocalBus = lcrr_div;
 	}
 #endif
+
+#if defined(CONFIG_FSL_IFC)
+	ccr = in_be32(&ifc_regs->ifc_ccr);
+	ccr = ((ccr & IFC_CCR_CLK_DIV_MASK) >> IFC_CCR_CLK_DIV_SHIFT) + 1;
+
+	sysInfo->freqLocalBus = sysInfo->freqSystemBus / ccr;
+#endif
 }