linux-kernel - [PATCH 1/6] ARM: dove: Add pcie clock support

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Date:	Tue, 25 Sep 2012 02:02:13 +0200
From:	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
To:	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
Cc:	Russell King <linux@....linux.org.uk>,
	Jason Cooper <jason@...edaemon.net>,
	Andrew Lunn <andrew@...n.ch>, Olof Johansson <olof@...om.net>,
	Arnd Bergmann <arnd@...db.de>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH 1/6] 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@...il.com>
---
Cc: Russell King <linux@....linux.org.uk>
Cc: Jason Cooper <jason@...edaemon.net>
Cc: Andrew Lunn <andrew@...n.ch>
Cc: Olof Johansson <olof@...om.net>
Cc: Arnd Bergmann <arnd@...db.de>
Cc: Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
Cc: linux-arm-kernel@...ts.infradead.org
Cc: linux-kernel@...r.kernel.org
---
 arch/arm/mach-dove/pcie.c |    5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm/mach-dove/pcie.c b/arch/arm/mach-dove/pcie.c
index bb15b26..0ef4435 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");
 
-- 
1.7.10.4

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