brain-hackers_pepepper-mirror/u-boot-brain
1
0
Fork 0
mirror of https://github.com/brain-hackers/u-boot-brain synced 2024-09-27 23:20:26 +09:00
Code Issues Projects Releases Wiki Activity

pci: mx6: Implement power callback

Browse Source 
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>
This commit is contained in:
Marek Vasut 2014-03-23 22:45:40 +01:00 committed by Stefano Babic
parent ed2f0e1ffa
commit a778aeae05
1 changed files with 12 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/pci/pcie_imx.c
View File

@ -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);