ARM: tegra: enable PCIe controller on p2771-0000

[oweals/u-boot.git] / board / nvidia / p2771-0000 / p2771-0000.c

diff --git a/board/nvidia/p2771-0000/p2771-0000.c b/board/nvidia/p2771-0000/p2771-0000.c
index 0c828a200542d023d6db2cf92fec4ad82874a75a..529ed9d4547a1712aabb9557c4c7f76e450ceaad 100644 (file)
--- a/board/nvidia/p2771-0000/p2771-0000.c
+++ b/board/nvidia/p2771-0000/p2771-0000.c
@@ -31,3 +31,25 @@ int tegra_board_init(void)
 
        return 0;
 }
+
+int tegra_pcie_board_init(void)
+{
+       struct udevice *dev;
+       uchar val;
+       int ret;
+
+       /* Turn on MAX77620 LDO7 to 1.05V for PEX power */
+       debug("%s: Set LDO7 for PEX power to 1.05V\n", __func__);
+       ret = i2c_get_chip_for_busnum(0, MAX77620_I2C_ADDR_7BIT, 1, &dev);
+       if (ret) {
+               printf("%s: Cannot find MAX77620 I2C chip\n", __func__);
+               return -1;
+       }
+       /* 0xC5 for 1.05v, enabled: bit7:6 = 11 = enable, bit5:0 = voltage */
+       val = 0xC5;
+       ret = dm_i2c_write(dev, MAX77620_CNFG1_L7_REG, &val, 1);
+       if (ret)
+               printf("i2c_write 0 0x3c 0x31 failed: %d\n", ret);
+
+       return 0;
+}