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 --- drivers/pci/pcie_imx.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-)
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 @@ static int imx6_pcie_init_phy(void) 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 @@ static int imx6_pcie_deassert_core_reset(void) { 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);