From 7d289d6239b29171bf9503869f1a92c084cf1c35 Mon Sep 17 00:00:00 2001 From: Stefan Agner Date: Wed, 13 Sep 2017 14:29:44 -0700 Subject: [PATCH] imx: add macro to detect whether USB PHY is active This macro allows to detect whether the USB PHY is active. This is helpful to detect if the boot ROM has previously started the USB serial downloader. The idea is taken from the mfgtool support in the NXP U-Boot: http://git.freescale.com/git/cgit.cgi/imx/uboot-imx.git/commit/?h=imx_v2016.03_4.1.15_2.0.0_ga&id=a352ed3c5184b95c4c9f7468f5fbb5f43de5e412 Signed-off-by: Stefan Agner Acked-by: Marcel Ziswiler Tested-by: Fabio Estevam Reviewed-by: Eric Nelson --- arch/arm/include/asm/arch-mx6/sys_proto.h | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/arch/arm/include/asm/arch-mx6/sys_proto.h b/arch/arm/include/asm/arch-mx6/sys_proto.h index 14f5d948c9..ba73943260 100644 --- a/arch/arm/include/asm/arch-mx6/sys_proto.h +++ b/arch/arm/include/asm/arch-mx6/sys_proto.h @@ -6,3 +6,10 @@ */ #include + +#define USBPHY_PWD 0x00000000 + +#define USBPHY_PWD_RXPWDRX (1 << 20) /* receiver block power down */ + +#define is_usbotg_phy_active(void) (!(readl(USB_PHY0_BASE_ADDR + USBPHY_PWD) & \ + USBPHY_PWD_RXPWDRX)) -- 2.25.1