pci: mx6: Implement power callback
Implement a callback to toggle the slot power supply. The callback
can be overriden in case some more complex power supply for the slot
was implemented in hardware, yet for the usual case, one can define
a GPIO which toggles the power to the slot.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Cc: Liu Ying <Ying.Liu@freescale.com>
diff --git a/drivers/pci/pcie_imx.c b/drivers/pci/pcie_imx.c
index 34377e9..8951a93 100644
--- a/drivers/pci/pcie_imx.c
+++ b/drivers/pci/pcie_imx.c
@@ -451,6 +451,17 @@
return 0;
}
+__weak int imx6_pcie_toggle_power(void)
+{
+#ifdef CONFIG_PCIE_IMX_POWER_GPIO
+ gpio_direction_output(CONFIG_PCIE_IMX_POWER_GPIO, 0);
+ mdelay(20);
+ gpio_set_value(CONFIG_PCIE_IMX_POWER_GPIO, 1);
+ mdelay(20);
+#endif
+ return 0;
+}
+
__weak int imx6_pcie_toggle_reset(void)
{
/*
@@ -496,7 +507,7 @@
{
struct iomuxc *iomuxc_regs = (struct iomuxc *)IOMUXC_BASE_ADDR;
- /* FIXME: Power-up GPIO goes here. */
+ imx6_pcie_toggle_power();
/* Enable PCIe */
clrbits_le32(&iomuxc_regs->gpr[1], IOMUXC_GPR1_TEST_POWERDOWN);