MIPS: OCTEON: Set proper UART clock in internal device trees.

Following patch to use generic 8250 drivers will need proper clock
information.  So when using the internal device tree, populate the
"clock-frequency" property with the correct value.

Signed-off-by: David Daney <david.daney@cavium.com>
Cc: linux-mips@linux-mips.org
Cc: Jamie Iles <jamie@jamieiles.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: linux-serial@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/5515/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 8 insertions, 1 deletions

diff --git a/arch/mips/cavium-octeon/octeon-platform.c b/arch/mips/cavium-octeon/octeon-platform.c
index 389512e2abd6..7b746e7bf7a1 100644
--- a/arch/mips/cavium-octeon/octeon-platform.c
+++ b/arch/mips/cavium-octeon/octeon-platform.c
@@ -490,8 +490,15 @@ int __init octeon_prune_device_tree(void)
 
                 if (alias_prop) {
                         uart = fdt_path_offset(initial_boot_params, alias_prop);
-                        if (uart_mask & (1 << i))
+                        if (uart_mask & (1 << i)) {
+                                __be32 f;
+
+                                f = cpu_to_be32(octeon_get_io_clock_rate());
+                                fdt_setprop_inplace(initial_boot_params,
+                                                    uart, "clock-frequency",
+                                                    &f, sizeof(f));
                                 continue;
+                        }
                         pr_debug("Deleting uart%d\n", i);
                         fdt_nop_node(initial_boot_params, uart);
                         fdt_nop_property(initial_boot_params, aliases,