Merge https://source.denx.de/u-boot/custodians/u-boot-riscv

+ Implement OpenSBI DBCN extension for early debug console
+ Fixes for VisionFive2 board
      + Fix timer missing
      + Fix L2 LIM issue
      + Enable PCIE auto enumeration to support USB and NVMe by default
+ Set eth0 mac address properly
+ Add __noreturn attribute to spl_invoke_opensbi

3 files changed, 50 insertions, 3 deletions

diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig
index a1e089962a..8c54bc9c47 100644
--- a/drivers/serial/Kconfig
+++ b/drivers/serial/Kconfig
@@ -218,6 +218,7 @@ config DEBUG_UART
 choice
 	prompt "Select which UART will provide the debug UART"
 	depends on DEBUG_UART
+	default DEBUG_SBI_CONSOLE if RISCV_SMODE
 	default DEBUG_UART_NS16550
 
 config DEBUG_UART_ALTERA_JTAGUART
@@ -289,11 +290,13 @@ config DEBUG_EFI_CONSOLE
 
 config DEBUG_SBI_CONSOLE
 	bool "SBI"
-	depends on SBI_V01
+	depends on RISCV_SMODE
 	help
 	  Select this to enable a debug console which calls back to SBI to
 	  output to the console. This can be useful for early debugging of
 	  U-Boot when running on top of SBI (Supervisor Binary Interface).
+	  This implementation of the debug UART is not available while in
+	  M-mode (e.g. during SPL).
 
 config DEBUG_UART_S5P
 	bool "Samsung S5P"
diff --git a/drivers/serial/serial_sbi.c b/drivers/serial/serial_sbi.c
index b9f35ed36e..a51a96c1ef 100644
--- a/drivers/serial/serial_sbi.c
+++ b/drivers/serial/serial_sbi.c
@@ -3,6 +3,8 @@
 #include <debug_uart.h>
 #include <asm/sbi.h>
 
+#ifdef CONFIG_SBI_V01
+
 static inline void _debug_uart_init(void)
 {
 }
@@ -13,4 +15,22 @@ static inline void _debug_uart_putc(int c)
 		sbi_console_putchar(c);
 }
 
+#else
+
+static int sbi_dbcn_available;
+
+static inline void _debug_uart_init(void)
+{
+	if (CONFIG_IS_ENABLED(RISCV_SMODE))
+		sbi_dbcn_available = sbi_probe_extension(SBI_EXT_DBCN);
+}
+
+static inline void _debug_uart_putc(int ch)
+{
+	if (CONFIG_IS_ENABLED(RISCV_SMODE) && sbi_dbcn_available)
+		sbi_dbcn_write_byte(ch);
+}
+
+#endif
+
 DEBUG_UART_FUNCS
diff --git a/drivers/timer/riscv_timer.c b/drivers/timer/riscv_timer.c
index 3627ed79b8..28a6a6870b 100644
--- a/drivers/timer/riscv_timer.c
+++ b/drivers/timer/riscv_timer.c
@@ -13,6 +13,7 @@
 #include <common.h>
 #include <dm.h>
 #include <errno.h>
+#include <fdt_support.h>
 #include <timer.h>
 #include <asm/csr.h>
 
@@ -53,9 +54,26 @@ u64 notrace timer_early_get_count(void)
 static int riscv_timer_probe(struct udevice *dev)
 {
 	struct timer_dev_priv *uc_priv = dev_get_uclass_priv(dev);
+	u32 rate;
 
-	/* clock frequency was passed from the cpu driver as driver data */
-	uc_priv->clock_rate = dev->driver_data;
+	/*  When this function was called from the CPU driver, clock
+	 *  frequency is passed as driver data.
+	 */
+	rate = dev->driver_data;
+
+	/* When called from an FDT match, the rate needs to be looked up. */
+	if (!rate && gd->fdt_blob) {
+		rate = fdt_getprop_u32_default(gd->fdt_blob,
+					       "/cpus", "timebase-frequency", 0);
+	}
+
+	uc_priv->clock_rate = rate;
+
+	/* With rate==0, timer uclass post_probe might later fail with -EINVAL.
+	 * Give a hint at the cause for debugging.
+	 */
+	if (!rate)
+		log_err("riscv_timer_probe with invalid clock rate 0!\n");
 
 	return 0;
 }
@@ -64,9 +82,15 @@ static const struct timer_ops riscv_timer_ops = {
 	.get_count = riscv_timer_get_count,
 };
 
+static const struct udevice_id riscv_timer_ids[] = {
+	{ .compatible = "riscv,timer", },
+	{ }
+};
+
 U_BOOT_DRIVER(riscv_timer) = {
 	.name = "riscv_timer",
 	.id = UCLASS_TIMER,
+	.of_match = of_match_ptr(riscv_timer_ids),
 	.probe = riscv_timer_probe,
 	.ops = &riscv_timer_ops,
 	.flags = DM_FLAG_PRE_RELOC,