openwrtv4/target/linux/brcm2708/patches-4.4/0432-clk-bcm2835-Don-t-rate-change-PLLs-on-behalf-of-divi.patch

From bf239659e82c137de23c322fa852b24a0acd3156 Mon Sep 17 00:00:00 2001
From: Eric Anholt <eric@anholt.net>
Date: Thu, 31 Mar 2016 12:51:04 -0700
Subject: [PATCH] clk: bcm2835: Don't rate change PLLs on behalf of dividers.

Our core PLLs are intended to be configured once and left alone.  With
the flag set, asking to set the PLLD_DSI1 clock rate would change PLLD
just to get closer to the requested DSI clock, thus changing PLLD_PER,
the UART and ethernet PHY clock rates downstream of it, and breaking
ethernet.

Signed-off-by: Eric Anholt <eric@anholt.net>
---
 drivers/clk/bcm/clk-bcm2835.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/clk/bcm/clk-bcm2835.c
+++ b/drivers/clk/bcm/clk-bcm2835.c
@@ -1211,7 +1211,7 @@ bcm2835_register_pll_divider(struct bcm2
 	init.num_parents = 1;
 	init.name = divider_name;
 	init.ops = &bcm2835_pll_divider_clk_ops;
-	init.flags = CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED;
+	init.flags = CLK_IGNORE_UNUSED;
 
 	divider = devm_kzalloc(cprman->dev, sizeof(*divider), GFP_KERNEL);
 	if (!divider)