armv8/fsl-lsch3: Add support for second DDR clock

FSL-LSCH3 platforms can have multiple DDR clocks. LS2085A has one clock for
general DDR controlers, and another clock for DP-DDR. DDR driver needs to
change to support multiple clocks.

Signed-off-by: York Sun <yorksun@freescale.com>

arch/arm/cpu/armv8/fsl-lsch3/cpu.c

@@ -367,6 +367,7 @@ int print_cpuinfo(void)
 	printf("\n       Bus:      %-4s MHz  ",
 	       strmhz(buf, sysinfo.freq_systembus));
 	printf("DDR:      %-4s MHz", strmhz(buf, sysinfo.freq_ddrbus));
+	printf("     DP-DDR:   %-4s MHz", strmhz(buf, sysinfo.freq_ddrbus2));
 	puts("\n");
 
 	return 0;

arch/arm/cpu/armv8/fsl-lsch3/speed.c

@@ -77,8 +77,10 @@ void get_sys_info(struct sys_info *sys_info)
 	sys_info->freq_systembus = sysclk;
 #ifdef CONFIG_DDR_CLK_FREQ
 	sys_info->freq_ddrbus = CONFIG_DDR_CLK_FREQ;
+	sys_info->freq_ddrbus2 = CONFIG_DDR_CLK_FREQ;
 #else
 	sys_info->freq_ddrbus = sysclk;
+	sys_info->freq_ddrbus2 = sysclk;
 #endif
 
 	sys_info->freq_systembus *= (in_le32(&gur->rcwsr[0]) >>
@@ -87,6 +89,9 @@ void get_sys_info(struct sys_info *sys_info)
 	sys_info->freq_ddrbus *= (in_le32(&gur->rcwsr[0]) >>
 			FSL_CHASSIS3_RCWSR0_MEM_PLL_RAT_SHIFT) &
 			FSL_CHASSIS3_RCWSR0_MEM_PLL_RAT_MASK;
+	sys_info->freq_ddrbus2 *= (in_le32(&gur->rcwsr[0]) >>
+			FSL_CHASSIS3_RCWSR0_MEM2_PLL_RAT_SHIFT) &
+			FSL_CHASSIS3_RCWSR0_MEM2_PLL_RAT_MASK;
 
 	for (i = 0; i < CONFIG_SYS_FSL_NUM_CC_PLLS; i++) {
 		/*
@@ -129,7 +134,7 @@ int get_clocks(void)
 	gd->cpu_clk = sys_info.freq_processor[0];
 	gd->bus_clk = sys_info.freq_systembus;
 	gd->mem_clk = sys_info.freq_ddrbus;
-
+	gd->arch.mem2_clk = sys_info.freq_ddrbus2;
 #if defined(CONFIG_FSL_ESDHC)
 	gd->arch.sdhc_clk = gd->bus_clk / 2;
 #endif /* defined(CONFIG_FSL_ESDHC) */
@@ -156,11 +161,18 @@ ulong get_bus_freq(ulong dummy)
  * get_ddr_freq
  * return ddr bus freq in Hz
  *********************************************/
-ulong get_ddr_freq(ulong dummy)
+ulong get_ddr_freq(ulong ctrl_num)
 {
 	if (!gd->mem_clk)
 		get_clocks();
 
+	/*
+	 * DDR controller 0 & 1 are on memory complex 0
+	 * DDR controler 2 is on memory complext 1
+	 */
+	if (ctrl_num >= 2)
+		return gd->arch.mem2_clk;
+
 	return gd->mem_clk;
 }
 

arch/arm/include/asm/arch-fsl-lsch3/immap_lsch3.h

@@ -15,6 +15,7 @@ struct sys_info {
 	unsigned long freq_processor[CONFIG_MAX_CPUS];
 	unsigned long freq_systembus;
 	unsigned long freq_ddrbus;
+	unsigned long freq_ddrbus2;
 	unsigned long freq_localbus;
 	unsigned long freq_qe;
 #ifdef CONFIG_SYS_DPAA_FMAN
@@ -60,6 +61,8 @@ struct ccsr_gur {
 #define FSL_CHASSIS3_RCWSR0_SYS_PLL_RAT_MASK	0x1f
 #define FSL_CHASSIS3_RCWSR0_MEM_PLL_RAT_SHIFT	10
 #define FSL_CHASSIS3_RCWSR0_MEM_PLL_RAT_MASK	0x3f
+#define FSL_CHASSIS3_RCWSR0_MEM2_PLL_RAT_SHIFT	18
+#define FSL_CHASSIS3_RCWSR0_MEM2_PLL_RAT_MASK	0x3f
 	u8	res_180[0x200-0x180];
 	u32	scratchrw[32];	/* Scratch Read/Write */
 	u8	res_280[0x300-0x280];

arch/arm/include/asm/global_data.h

@@ -48,6 +48,9 @@ struct arch_global_data {
 #ifdef CONFIG_OMAP
 	struct omap_boot_parameters omap_boot_params;
 #endif
+#ifdef CONFIG_FSL_LSCH3
+	unsigned long mem2_clk;
+#endif
 };
 
 #include <asm-generic/global_data.h>