linux-kernel - [PATCH 2/5] MIPS: OCTEON: Set proper UART clock in internal device trees.

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Date:	Tue, 18 Jun 2013 12:12:52 -0700
From:	David Daney <ddaney.cavm@...il.com>
To:	linux-mips@...ux-mips.org, ralf@...ux-mips.org,
	Jamie Iles <jamie@...ieiles.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jiri Slaby <jslaby@...e.cz>, linux-serial@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, David Daney <david.daney@...ium.com>
Subject: [PATCH 2/5] MIPS: OCTEON: Set proper UART clock in internal device trees.

From: David Daney <david.daney@...ium.com>

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@...ium.com>
---
 arch/mips/cavium-octeon/octeon-platform.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/arch/mips/cavium-octeon/octeon-platform.c b/arch/mips/cavium-octeon/octeon-platform.c
index 389512e..7b746e7 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,
-- 
1.7.11.7

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