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imx: bk4: Print proper HW revision of VF610's BK4 board

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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 <lukma@denx.de>
This commit is contained in:
Lukasz Majewski 2019-07-28 00:17:05 +02:00 committed by Stefano Babic
parent 77ecf95f22
commit 1ff6c1f75b
1 changed files with 14 additions and 1 deletions
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15
board/phytec/pcm052/pcm052.c
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@ -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