From: Ye Li ye.li@nxp.com
Since there is no uclass for USB PHY. The device won't be setup for the USB PHY node in DTB. And its associated power domain device won't be turned on neither by DM framework.
This patch modifies the ehci-mx6 driver to enable the power domain device before access the USB PHY. This is only for DM driver. For non-DM part, users still need to power on the USB PHY in boards/SoC codes.
Reviewed-by: Peng Fan peng.fan@nxp.com Signed-off-by: Ye Li ye.li@nxp.com Signed-off-by: Peng Fan peng.fan@nxp.com --- drivers/usb/host/ehci-mx6.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+)
diff --git a/drivers/usb/host/ehci-mx6.c b/drivers/usb/host/ehci-mx6.c index b1721cd915..0727aafc92 100644 --- a/drivers/usb/host/ehci-mx6.c +++ b/drivers/usb/host/ehci-mx6.c @@ -2,6 +2,7 @@ /* * Copyright (c) 2009 Daniel Mack daniel@caiaq.de * Copyright (C) 2010 Freescale Semiconductor, Inc. + * */
#include <common.h> @@ -19,6 +20,7 @@ #include <asm/mach-imx/sys_proto.h> #include <dm.h> #include <asm/mach-types.h> +#include <power-domain.h> #include <power/regulator.h> #include <linux/iopoll.h> #include <linux/usb/otg.h> @@ -569,6 +571,20 @@ static int ehci_usb_phy_mode(struct udevice *dev) if ((fdt_addr_t)addr == FDT_ADDR_T_NONE) return -EINVAL;
+ /* Need to power on the PHY before access it */ +#if CONFIG_IS_ENABLED(POWER_DOMAIN) + struct udevice phy_dev; + struct power_domain pd; + int ret; + + phy_dev.node = offset_to_ofnode(phy_off); + if (!power_domain_get(&phy_dev, &pd)) { + ret = power_domain_on(&pd); + if (ret) + return ret; + } +#endif + phy_ctrl = (void __iomem *)(addr + USBPHY_CTRL); val = readl(phy_ctrl);