diff options
Diffstat (limited to 'arch/sh/drivers/pci/pcie-sh7786.c')
| -rw-r--r-- | arch/sh/drivers/pci/pcie-sh7786.c | 23 |
1 files changed, 21 insertions, 2 deletions
diff --git a/arch/sh/drivers/pci/pcie-sh7786.c b/arch/sh/drivers/pci/pcie-sh7786.c index 8ec4af197388..ae0b2c9b70a0 100644 --- a/arch/sh/drivers/pci/pcie-sh7786.c +++ b/arch/sh/drivers/pci/pcie-sh7786.c @@ -17,7 +17,6 @@ #include <linux/sh_clk.h> #include "pcie-sh7786.h" #include <asm/sizes.h> -#include <asm/clock.h> struct sh7786_pcie_port { struct pci_channel *hose; @@ -510,6 +509,7 @@ static struct sh7786_pcie_hwops sh7786_65nm_pcie_hwops __initdata = { static int __init sh7786_pcie_init(void) { + struct clk *platclk; int ret = 0, i; printk(KERN_NOTICE "PCI: Starting initialization.\n"); @@ -527,6 +527,22 @@ static int __init sh7786_pcie_init(void) if (unlikely(!sh7786_pcie_ports)) return -ENOMEM; + /* + * Fetch any optional platform clock associated with this block. + * + * This is a rather nasty hack for boards with spec-mocking FPGAs + * that have a secondary set of clocks outside of the on-chip + * ones that need to be accounted for before there is any chance + * of touching the existing MSTP bits or CPG clocks. + */ + platclk = clk_get(NULL, "pcie_plat_clk"); + if (IS_ERR(platclk)) { + /* Sane hardware should probably get a WARN_ON.. */ + platclk = NULL; + } + + clk_enable(platclk); + printk(KERN_NOTICE "PCI: probing %d ports.\n", nr_ports); for (i = 0; i < nr_ports; i++) { @@ -539,8 +555,11 @@ static int __init sh7786_pcie_init(void) ret |= sh7786_pcie_hwops->port_init_hw(port); } - if (unlikely(ret)) + if (unlikely(ret)) { + clk_disable(platclk); + clk_put(platclk); return ret; + } return 0; } |