bcm6838: add initial support
This adds the initial support of the Broadcom BCM6838 SoC familly,
only cpu, dram, uart and leds are supported.
Signed-off-by: Philippe Reynes <philippe.reynes@softathome.com>
Reviewed-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
diff --git a/drivers/cpu/bmips_cpu.c b/drivers/cpu/bmips_cpu.c
index 78560b0..fc04747 100644
--- a/drivers/cpu/bmips_cpu.c
+++ b/drivers/cpu/bmips_cpu.c
@@ -66,6 +66,10 @@
#define STRAPBUS_63268_FCVO_SHIFT 21
#define STRAPBUS_63268_FCVO_MASK (0xf << STRAPBUS_63268_FCVO_SHIFT)
+#define REG_BCM6838_OTP_BRCMBITS0 0x440
+#define VIPER_6838_FREQ_SHIFT 18
+#define VIPER_6838_FREQ_MASK (0x7 << VIPER_6838_FREQ_SHIFT)
+
struct bmips_cpu_priv;
struct bmips_cpu_hw {
@@ -272,6 +276,26 @@
}
}
+static ulong bcm6838_get_cpu_freq(struct bmips_cpu_priv *priv)
+{
+ unsigned int mips_viper_freq;
+
+ mips_viper_freq = readl_be(priv->regs + REG_BCM6838_OTP_BRCMBITS0);
+ mips_viper_freq = (mips_viper_freq & VIPER_6838_FREQ_MASK)
+ >> VIPER_6838_FREQ_SHIFT;
+
+ switch (mips_viper_freq) {
+ case 0x0:
+ return 600000000;
+ case 0x1:
+ return 400000000;
+ case 0x2:
+ return 240000000;
+ default:
+ return 0;
+ }
+}
+
static int bcm6328_get_cpu_count(struct bmips_cpu_priv *priv)
{
u32 val = readl_be(priv->regs + REG_BCM6328_OTP);
@@ -346,6 +370,12 @@
.get_cpu_count = bcm6358_get_cpu_count,
};
+static const struct bmips_cpu_hw bmips_cpu_bcm6838 = {
+ .get_cpu_desc = bmips_short_cpu_desc,
+ .get_cpu_freq = bcm6838_get_cpu_freq,
+ .get_cpu_count = bcm6358_get_cpu_count,
+};
+
/* Generic CPU Ops */
static int bmips_cpu_get_desc(struct udevice *dev, char *buf, int size)
{
@@ -444,6 +474,9 @@
}, {
.compatible = "brcm,bcm63268-cpu",
.data = (ulong)&bmips_cpu_bcm63268,
+ }, {
+ .compatible = "brcm,bcm6838-cpu",
+ .data = (ulong)&bmips_cpu_bcm6838,
},
{ /* sentinel */ }
};