This code uses HW difference on the USB_RESET pin (added PULL UP resistor on the L333 rev) to distinguish between two BK4 HW revisions.
Signed-off-by: Lukasz Majewski <[email protected]> --- board/phytec/pcm052/pcm052.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) diff --git a/board/phytec/pcm052/pcm052.c b/board/phytec/pcm052/pcm052.c index c30df5df9d..ffe9ec8db6 100644 --- a/board/phytec/pcm052/pcm052.c +++ b/board/phytec/pcm052/pcm052.c @@ -403,7 +403,20 @@ int board_phy_config(struct phy_device *phydev) int checkboard(void) { #ifdef CONFIG_TARGET_BK4R1 - puts("Board: BK4r1 (L333)\n"); + u32 *gpio3_pdir = (u32 *)(GPIO3_BASE_ADDR + 0x10); + + /* + * USB_RESET_N (PTC30 - GPIO103 - PORT3[7]): + * L333 -> pull up added -> read 1 + * L320 -> no pull up -> read 0 + * + * Default iomuxc_ptc30 value after reset: 0x300061 -> RCON28 + * - input enabled, pull (up/down) disabled + */ + if (*gpio3_pdir & BIT(7)) + puts("Board: BK4r1 (L333)\n"); + else + puts("Board: BK4r1 (L320)\n"); #else puts("Board: PCM-052\n"); #endif -- 2.11.0 _______________________________________________ U-Boot mailing list [email protected] https://lists.denx.de/listinfo/u-boot
