[U-Boot] [PATCH 12/12] da850: print DDR frequency from u-boot

[nagabhushana.netagunte at ti.com]

From: Nagabhushana Netagunte <nagabhushana.netagunte at ti.com>

Print DDR frequency when u-boot is coming up. Function
is added in hardware.h to find which PLL clock is used.

Signed-off-by: Rajashekhara, Sudhakar <sudhakar.raj at ti.com>
Signed-off-by: Nagabhushana Netagunte <nagabhushana.netagunte at ti.com>
---
 arch/arm/include/asm/arch-davinci/hardware.h |   16 ++++++++++++++--
 board/davinci/da8xxevm/da850evm.c            |    1 +
 2 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/arch/arm/include/asm/arch-davinci/hardware.h b/arch/arm/include/asm/arch-davinci/hardware.h
index fda8203..e0473c9 100644
--- a/arch/arm/include/asm/arch-davinci/hardware.h
+++ b/arch/arm/include/asm/arch-davinci/hardware.h
@@ -35,7 +35,7 @@
 
 #include <config.h>
 #include <asm/sizes.h>
-
+#include <asm/io.h>
 #define	REG(addr)	(*(volatile unsigned int *)(addr))
 #define REG_P(addr)	((volatile unsigned int *)(addr))
 
@@ -381,8 +381,14 @@ struct davinci_pllc_regs {
 #define DAVINCI_PLLC_DIV_MASK	0x1f
 
 #define ASYNC3          get_async3_src()
-#define PLL1_SYSCLK2		((1 << 16) | 0x2)
+#define EMIFB		get_emifb_src()
+
+#define PLL1_PLLM	((1 << 16) | DAVINCI_PLLM_CLKID)
+#define PLL1_SYSCLK1	((1 << 16) | 0x1)
+#define PLL1_SYSCLK2	((1 << 16) | 0x2)
 #define DAVINCI_SPI1_CLKID  (cpu_is_da830() ? 2 : ASYNC3)
+#define DAVINCI_DDR_CLKID	EMIFB
+
 /* Clock IDs */
 enum davinci_clk_ids {
 	DAVINCI_SPI0_CLKID = 2,
@@ -486,6 +492,12 @@ static inline int get_async3_src(void)
 			PLL1_SYSCLK2 : 2;
 }
 
+static inline int get_emifb_src(void)
+{
+	return (readl(&davinci_syscfg_regs->cfgchip3) & 0x80) ?
+			PLL1_PLLM : PLL1_SYSCLK1;
+}
+
 #endif /* CONFIG_SOC_DA8XX */
 
 #endif /* __ASM_ARCH_HARDWARE_H */
diff --git a/board/davinci/da8xxevm/da850evm.c b/board/davinci/da8xxevm/da850evm.c
index a0b4425..3a4f041 100644
--- a/board/davinci/da8xxevm/da850evm.c
+++ b/board/davinci/da8xxevm/da850evm.c
@@ -507,6 +507,7 @@ int misc_init_r(void)
 	int ret;
 
 	printf("ARM Clock : %d Hz\n", clk_get(DAVINCI_ARM_CLKID));
+	printf("DDR Clock : %d Hz\n", clk_get(DAVINCI_DDR_CLKID)/2);
 
 	if (!eth_getenv_enetaddr("ethaddr", enetaddr)) {
 		/* Read Ethernet MAC address from EEPROM */
-- 
1.6.2.4