From 81df84f4060f4f19c7e6f39c7c527a6098436a2a Mon Sep 17 00:00:00 2001 From: Paul Mundt Date: Sun, 19 Sep 2010 13:57:51 +0900 Subject: sh: pci: Give SH7786 PHY some time to settle. The spec suggests waiting up to 500ms for the PHY to settle before testing link state, but practice shows that 100ms is sufficient (this is the delay value we also use on the other SH-4A PCI controllers, too). This makes device detection much more reliable, although in the future it should be a bit faster to simply serialize with a TLP IRQ. Signed-off-by: Paul Mundt --- arch/sh/drivers/pci/pcie-sh7786.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'arch/sh/drivers') diff --git a/arch/sh/drivers/pci/pcie-sh7786.c b/arch/sh/drivers/pci/pcie-sh7786.c index 5ae58ec025c..4e6cf880497 100644 --- a/arch/sh/drivers/pci/pcie-sh7786.c +++ b/arch/sh/drivers/pci/pcie-sh7786.c @@ -312,6 +312,9 @@ static int pcie_init(struct sh7786_pcie_port *port) data |= 0x1; pci_write_reg(chan, data, SH4A_PCIETCTLR); + /* Let things settle down a bit.. */ + mdelay(100); + /* Enable DL_Active Interrupt generation */ data = pci_read_reg(chan, SH4A_PCIEDLINTENR); data |= PCIEDLINTENR_DLL_ACT_ENABLE; -- cgit v1.2.3-70-g09d2