[ARM] Kirkwood: clock gating for unused peripherals

To save power:

1. Enabling clock gating of unused peripherals

2. PLL and PHY of the units are also disabled (when possible.

Signed-off-by: Rabeeh Khoury <rabeeh@marvell.com>
Signed-off-by: Nicolas Pitre <nico@marvell.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/arch/arm/mach-kirkwood/pcie.c b/arch/arm/mach-kirkwood/pcie.c
index 73fccacd1a73..d90b9aae308d 100644
--- a/arch/arm/mach-kirkwood/pcie.c
+++ b/arch/arm/mach-kirkwood/pcie.c
@@ -14,6 +14,7 @@
 #include <asm/irq.h>
 #include <asm/mach/pci.h>
 #include <plat/pcie.h>
+#include <mach/bridge-regs.h>
 #include "common.h"
 
 
@@ -95,6 +96,7 @@ static struct pci_ops pcie_ops = {
 static int kirkwood_pcie_setup(int nr, struct pci_sys_data *sys)
 {
         struct resource *res;
+        extern unsigned int kirkwood_clk_ctrl;
 
         /*
          * Generic PCIe unit setup.
@@ -133,6 +135,8 @@ static int kirkwood_pcie_setup(int nr, struct pci_sys_data *sys)
         sys->resource[2] = NULL;
         sys->io_offset = 0;
 
+        kirkwood_clk_ctrl |= CGC_PEX0;
+
         return 1;
 }