DaVinci DA8xx: replace magic number for DDR speed

Replace a magic number for the DDR2/mDDR PHY clock ID with a proper
definition. In addition, don't request this clock ID on DA830 hardware,
which does not have a DDR2/mDDR PHY (or associated PLL controller).

Signed-off-by: Laurence Withers <lwithers@guralp.com>
Cc: Tom Rini <trini@ti.com>
Cc: Prabhakar Lad <prabhakar.csengg@gmail.com>

arch/arm/cpu/arm926ejs/davinci/cpu.c

@@ -194,7 +194,8 @@ int set_cpu_clk_info(void)
 #ifdef CONFIG_SOC_DA8XX
 	gd->bd->bi_arm_freq = clk_get(DAVINCI_ARM_CLKID) / 1000000;
 	/* DDR PHY uses an x2 input clock */
-	gd->bd->bi_ddr_freq = clk_get(0x10001) / 1000000;
+	gd->bd->bi_ddr_freq = cpu_is_da830() ? 0 :
+				(clk_get(DAVINCI_DDR_CLKID) / 1000000);
 #else
 
 	unsigned int pllbase = DAVINCI_PLL_CNTRL0_BASE;

arch/arm/include/asm/arch-davinci/hardware.h

@@ -459,10 +459,12 @@ enum davinci_clk_ids {
 	DAVINCI_PLL0_SYSCLK2			= DAVINCI_PLLC0_FLAG | 2,
 	DAVINCI_PLL0_SYSCLK4			= DAVINCI_PLLC0_FLAG | 4,
 	DAVINCI_PLL0_SYSCLK6			= DAVINCI_PLLC0_FLAG | 6,
+	DAVINCI_PLL1_SYSCLK1			= DAVINCI_PLLC1_FLAG | 1,
 	DAVINCI_PLL1_SYSCLK2			= DAVINCI_PLLC1_FLAG | 2,
 
 	/* map peripherals to clock IDs */
 	DAVINCI_ARM_CLKID			= DAVINCI_PLL0_SYSCLK6,
+	DAVINCI_DDR_CLKID			= DAVINCI_PLL1_SYSCLK1,
 	DAVINCI_MDIO_CLKID			= DAVINCI_PLL0_SYSCLK4,
 	DAVINCI_MMC_CLKID			= DAVINCI_PLL0_SYSCLK2,
 	DAVINCI_SPI0_CLKID			= DAVINCI_PLL0_SYSCLK2,