timer: orion-timer: Add support for other Armada SoC's

This patch adds support for other Marvell Armada SoC's, supporting the
25MHz fixed clock operation, like the Armada XP etc.

Signed-off-by: Stefan Roese <sr@denx.de>
Tested-by: Tony Dinh <mibodhi@gmail.com>

2 files changed, 43 insertions, 4 deletions

diff --git a/drivers/timer/Kconfig b/drivers/timer/Kconfig
index 1b49236039..fd8745ffc2 100644
--- a/drivers/timer/Kconfig
+++ b/drivers/timer/Kconfig
@@ -203,8 +203,11 @@ config OMAP_TIMER
 config ORION_TIMER
 	bool "Orion timer support"
 	depends on TIMER
+	default y if ARCH_KIRKWOOD || (ARCH_MVEBU && ARMADA_32BIT)
+	select TIMER_EARLY if ARCH_MVEBU
 	help
-	  Select this to enable an timer for Orion devices.
+	  Select this to enable an timer for Orion and Armada devices
+	  like Armada XP etc.
 
 config RISCV_TIMER
 	bool "RISC-V timer support"
diff --git a/drivers/timer/orion-timer.c b/drivers/timer/orion-timer.c
index d7d1a1b244..14f318e57d 100644
--- a/drivers/timer/orion-timer.c
+++ b/drivers/timer/orion-timer.c
@@ -11,10 +11,34 @@
 #define TIMER0_RELOAD		0x10
 #define TIMER0_VAL		0x14
 
+enum input_clock_type {
+	INPUT_CLOCK_NON_FIXED,
+	INPUT_CLOCK_25MHZ,	/* input clock rate is fixed to 25MHz */
+};
+
 struct orion_timer_priv {
 	void *base;
 };
 
+#define MVEBU_TIMER_FIXED_RATE_25MHZ	25000000
+
+/**
+ * timer_early_get_rate() - Get the timer rate before driver model
+ */
+unsigned long notrace timer_early_get_rate(void)
+{
+	return MVEBU_TIMER_FIXED_RATE_25MHZ;
+}
+
+/**
+ * timer_early_get_count() - Get the timer count before driver model
+ *
+ */
+u64 notrace timer_early_get_count(void)
+{
+	return timer_conv_64(~readl(MVEBU_TIMER_BASE + TIMER0_VAL));
+}
+
 static uint64_t orion_timer_get_count(struct udevice *dev)
 {
 	struct orion_timer_priv *priv = dev_get_priv(dev);
@@ -25,6 +49,7 @@ static uint64_t orion_timer_get_count(struct udevice *dev)
 static int orion_timer_probe(struct udevice *dev)
 {
 	struct timer_dev_priv *uc_priv = dev_get_uclass_priv(dev);
+	enum input_clock_type type = dev_get_driver_data(dev);
 	struct orion_timer_priv *priv = dev_get_priv(dev);
 
 	priv->base = devfdt_remap_addr_index(dev, 0);
@@ -33,11 +58,20 @@ static int orion_timer_probe(struct udevice *dev)
 		return -ENOMEM;
 	}
 
-	uc_priv->clock_rate = CONFIG_SYS_TCLK;
-
 	writel(~0, priv->base + TIMER0_VAL);
 	writel(~0, priv->base + TIMER0_RELOAD);
 
+	if (type == INPUT_CLOCK_25MHZ) {
+		/*
+		 * On Armada XP / 38x ..., the 25MHz clock source needs to
+		 * be enabled
+		 */
+		setbits_le32(priv->base + TIMER_CTRL, BIT(11));
+		uc_priv->clock_rate = MVEBU_TIMER_FIXED_RATE_25MHZ;
+	} else {
+		uc_priv->clock_rate = CONFIG_SYS_TCLK;
+	}
+
 	/* enable timer */
 	setbits_le32(priv->base + TIMER_CTRL, TIMER0_EN | TIMER0_RELOAD_EN);
 
@@ -49,7 +83,9 @@ static const struct timer_ops orion_timer_ops = {
 };
 
 static const struct udevice_id orion_timer_ids[] = {
-	{ .compatible = "marvell,orion-timer" },
+	{ .compatible = "marvell,orion-timer", .data = INPUT_CLOCK_NON_FIXED },
+	{ .compatible = "marvell,armada-370-timer", .data = INPUT_CLOCK_25MHZ },
+	{ .compatible = "marvell,armada-xp-timer", .data = INPUT_CLOCK_25MHZ },
 	{}
 };