arm: mvebu: Add support for MV78260

This patch adds support for the dual core Armada XP variant, the
MV78260. It has some minor differences to the 4-core MV78460,
e.g. only 12 serdes lanes.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Luka Perkov <luka.perkov@sartura.hr>
Cc: Phil Sutter <phil@nwl.cc>

arch/arm/mach-mvebu/cpu.c

@@ -50,7 +50,7 @@ int mvebu_soc_family(void)
 {
 	u16 devid = (readl(MVEBU_REG_PCIE_DEVID) >> 16) & 0xffff;
 
-	if (devid == SOC_MV78460_ID)
+	if ((devid == SOC_MV78260_ID) || (devid == SOC_MV78460_ID))
 		return MVEBU_SOC_AXP;
 
 	if (devid == SOC_88F6810_ID || devid == SOC_88F6820_ID ||
@@ -69,6 +69,9 @@ int print_cpuinfo(void)
 	puts("SoC:   ");
 
 	switch (devid) {
+	case SOC_MV78260_ID:
+		puts("MV78260-");
+		break;
 	case SOC_MV78460_ID:
 		puts("MV78460-");
 		break;

arch/arm/mach-mvebu/include/mach/soc.h

@@ -11,6 +11,7 @@
 #ifndef _MVEBU_SOC_H
 #define _MVEBU_SOC_H
 
+#define SOC_MV78260_ID		0x7826
 #define SOC_MV78460_ID		0x7846
 #define SOC_88F6810_ID		0x6810
 #define SOC_88F6820_ID		0x6820

arch/arm/mach-mvebu/serdes/axp/high_speed_env_lib.c

@@ -190,8 +190,15 @@ __weak MV_BIN_SERDES_CFG *board_serdes_cfg_get(u8 pex_mode)
 
 u16 ctrl_model_get(void)
 {
-	/* Right now only MV78460 supported */
+	/*
+	 * SoC version can't be autodetected. So we need to rely on a define
+	 * from the config system here.
+	 */
+#ifdef CONFIG_MV78260
+	return MV_78260_DEV_ID;
+#else
 	return MV_78460_DEV_ID;
+#endif
 }
 
 u32 get_line_cfg(u32 line_num, MV_BIN_SERDES_CFG *info)
@@ -202,6 +209,18 @@ u32 get_line_cfg(u32 line_num, MV_BIN_SERDES_CFG *info)
 		return (info->line8_15 >> ((line_num - 8) << 2)) & 0xF;
 }
 
+static int serdes_max_lines_get(void)
+{
+	switch (ctrl_model_get()) {
+	case MV_78260_DEV_ID:
+		return 12;
+	case MV_78460_DEV_ID:
+		return 16;
+	}
+
+	return 0;
+}
+
 int serdes_phy_config(void)
 {
 	int status = MV_OK;
@@ -226,10 +245,9 @@ int serdes_phy_config(void)
 	u32 pex_if_num;
 
 	/*
-	 * TODO:
-	 * Right now we only support the MV78460 with 16 serdes lines
+	 * Get max. serdes lines count
 	 */
-	max_serdes_lines = 16;
+	max_serdes_lines = serdes_max_lines_get();
 	if (max_serdes_lines == 0)
 		return MV_OK;
 
@@ -253,6 +271,8 @@ int serdes_phy_config(void)
 		if ((u8) MV_ERROR == (u8) satr11)
 			return MV_ERROR;
 		break;
+	default:
+		satr11 = 0;
 	}
 
 	board_modules_scan();