diff options
| author | Stefan Agner <[email protected]> | 2018-05-30 19:01:45 +0200 |
|---|---|---|
| committer | Stefano Babic <[email protected]> | 2018-07-23 10:12:00 +0200 |
| commit | 23eaf4180f9ff6f3898e0199e56cfcb563d2eb74 (patch) | |
| tree | 543e269fbff68f65caf11abe12ccbd397d11c105 | |
| parent | c7f367bc8d6b1b5da79aa430c4449c9f505b9577 (diff) | |
imx: add macro to detect whether USB has been initialized
This macro allows to detect whether the boot ROM initialized USB
already (serial downloader). This is helpful to reliably detect
if the system has been recovered via USB serial downloader.
Signed-off-by: Stefan Agner <[email protected]>
Acked-by: Marcel Ziswiler <[email protected]>
| -rw-r--r-- | arch/arm/include/asm/arch-mx6/imx-regs.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/arm/include/asm/arch-mx6/imx-regs.h b/arch/arm/include/asm/arch-mx6/imx-regs.h index 431439218dd..4f01b20aedf 100644 --- a/arch/arm/include/asm/arch-mx6/imx-regs.h +++ b/arch/arm/include/asm/arch-mx6/imx-regs.h @@ -996,5 +996,12 @@ struct pwm_regs { u32 pr; u32 cnr; }; + +/* + * If ROM fail back to USB recover mode, USBPH0_PWD will be clear to use USB + * If boot from the other mode, USB0_PWD will keep reset value + */ +#define is_boot_from_usb(void) (!(readl(USB_PHY0_BASE_ADDR) & (1<<20))) + #endif /* __ASSEMBLER__*/ #endif /* __ASM_ARCH_MX6_IMX_REGS_H__ */ |