From: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Date: Tue, 25 Sep 2012 00:02:13 +0000 (+0200)
Subject: ARM: dove: Add pcie clock support
X-Git-Tag: firefly_0821_release~3680^2~1703^2~17^2~5
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=529b89ef7ff898397ff3a44b527816a82d0c699c;p=firefly-linux-kernel-4.4.55.git

ARM: dove: Add pcie clock support

As dove now has clock gating control ensure pcie ports grab their
clocks.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
---

diff --git a/arch/arm/mach-dove/pcie.c b/arch/arm/mach-dove/pcie.c
index bb15b26041cb..0ef4435b1657 100644
--- a/arch/arm/mach-dove/pcie.c
+++ b/arch/arm/mach-dove/pcie.c
@@ -10,6 +10,7 @@
 
 #include <linux/kernel.h>
 #include <linux/pci.h>
+#include <linux/clk.h>
 #include <video/vga.h>
 #include <asm/mach/pci.h>
 #include <asm/mach/arch.h>
@@ -188,6 +189,10 @@ static void __init add_pcie_port(int index, void __iomem *base)
 
 	if (orion_pcie_link_up(base)) {
 		struct pcie_port *pp = &pcie_port[num_pcie_ports++];
+		struct clk *clk = clk_get_sys("pcie", (index ? "1" : "0"));
+
+		if (!IS_ERR(clk))
+			clk_prepare_enable(clk);
 
 		printk(KERN_INFO "link up\n");