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authorLinus Torvalds <torvalds@linux-foundation.org>2012-05-26 12:42:29 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-05-26 12:42:29 -0700
commit27953437059c64d14086196eb96f43c78caa9db3 (patch)
tree0cfd5fb21262a6db3de0c64462847b4c0c43e9df /arch/arm/mach-kirkwood/pcie.c
parent2c757fd5d1a92086f225a75a8fac7cab242d11b0 (diff)
parent3c0dec5f58b3c7b3627715126d1bf9b030a076f0 (diff)
Merge tag 'clock' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull arm-soc clock driver changes from Olof Johansson: "The new clock subsystem was merged in linux-3.4 without any users, this now moves the first three platforms over to it: imx, mxs and spear. The series also contains the changes for the clock subsystem itself, since Mike preferred to have it together with the platforms that require these changes, in order to avoid interdependencies and conflicts." Fix up trivial conflicts in arch/arm/mach-kirkwood/common.c (code removed in one branch, added OF support in another) and drivers/dma/imx-sdma.c (independent changes next to each other). * tag 'clock' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (97 commits) clk: Fix CLK_SET_RATE_GATE flag validation in clk_set_rate(). clk: Provide dummy clk_unregister() SPEAr: Update defconfigs SPEAr: Add SMI NOR partition info in dts files SPEAr: Switch to common clock framework SPEAr: Call clk_prepare() before calling clk_enable SPEAr: clk: Add General Purpose Timer Synthesizer clock SPEAr: clk: Add Fractional Synthesizer clock SPEAr: clk: Add Auxiliary Synthesizer clock SPEAr: clk: Add VCO-PLL Synthesizer clock SPEAr: Add DT bindings for SPEAr's timer ARM i.MX: remove now unused clock files ARM: i.MX6: implement clocks using common clock framework ARM i.MX35: implement clocks using common clock framework ARM i.MX5: implement clocks using common clock framework ARM: Kirkwood: Replace clock gating ARM: Orion: Audio: Add clk/clkdev support ARM: Orion: PCIE: Add support for clk ARM: Orion: XOR: Add support for clk ARM: Orion: CESA: Add support for clk ...
Diffstat (limited to 'arch/arm/mach-kirkwood/pcie.c')
-rw-r--r--arch/arm/mach-kirkwood/pcie.c25
1 files changed, 21 insertions, 4 deletions
diff --git a/arch/arm/mach-kirkwood/pcie.c b/arch/arm/mach-kirkwood/pcie.c
index de373176ee67..6e8b2efa3c35 100644
--- a/arch/arm/mach-kirkwood/pcie.c
+++ b/arch/arm/mach-kirkwood/pcie.c
@@ -11,6 +11,7 @@
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/slab.h>
+#include <linux/clk.h>
#include <video/vga.h>
#include <asm/irq.h>
#include <asm/mach/pci.h>
@@ -19,6 +20,23 @@
#include <plat/addr-map.h>
#include "common.h"
+static void kirkwood_enable_pcie_clk(const char *port)
+{
+ struct clk *clk;
+
+ clk = clk_get_sys("pcie", port);
+ if (IS_ERR(clk)) {
+ printk(KERN_ERR "PCIE clock %s missing\n", port);
+ return;
+ }
+ clk_prepare_enable(clk);
+ clk_put(clk);
+}
+
+/* This function is called very early in the boot when probing the
+ hardware to determine what we actually are, and what rate tclk is
+ ticking at. Hence calling kirkwood_enable_pcie_clk() is not
+ possible since the clk tree has not been created yet. */
void kirkwood_enable_pcie(void)
{
u32 curr = readl(CLOCK_GATING_CTRL);
@@ -26,7 +44,7 @@ void kirkwood_enable_pcie(void)
writel(curr | CGC_PEX0, CLOCK_GATING_CTRL);
}
-void __init kirkwood_pcie_id(u32 *dev, u32 *rev)
+void kirkwood_pcie_id(u32 *dev, u32 *rev)
{
kirkwood_enable_pcie();
*dev = orion_pcie_dev_id((void __iomem *)PCIE_VIRT_BASE);
@@ -159,7 +177,6 @@ static void __init pcie1_ioresources_init(struct pcie_port *pp)
static int __init kirkwood_pcie_setup(int nr, struct pci_sys_data *sys)
{
- extern unsigned int kirkwood_clk_ctrl;
struct pcie_port *pp;
int index;
@@ -178,11 +195,11 @@ static int __init kirkwood_pcie_setup(int nr, struct pci_sys_data *sys)
switch (index) {
case 0:
- kirkwood_clk_ctrl |= CGC_PEX0;
+ kirkwood_enable_pcie_clk("0");
pcie0_ioresources_init(pp);
break;
case 1:
- kirkwood_clk_ctrl |= CGC_PEX1;
+ kirkwood_enable_pcie_clk("1");
pcie1_ioresources_init(pp);
break;
default: