From a778aeae051c96319855584c87d1dc3ca7257744 Mon Sep 17 00:00:00 2001 From: Marek Vasut Date: Sun, 23 Mar 2014 22:45:40 +0100 Subject: [PATCH] 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 Cc: Stefano Babic Cc: Fabio Estevam Cc: Liu Ying --- 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 34377e90bd..8951a93bb6 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); -- 2.39.2