ram: k3-am654: add support for LPDDR4 and DDR3L DDRs

[oweals/u-boot.git] / drivers / power / twl4030.c

diff --git a/drivers/power/twl4030.c b/drivers/power/twl4030.c
index 52460014bff980c6af5b5a49bcb843448d5f60d4..42c9001518bff67a4fdbaabd48632ff08f449e59 100644 (file)
--- a/drivers/power/twl4030.c
+++ b/drivers/power/twl4030.c
@@ -179,3 +179,42 @@ int do_poweroff(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
        return 0;
 }
 #endif
+
+#ifdef CONFIG_DM_I2C
+int twl4030_i2c_write_u8(u8 chip_no, u8 reg, u8 val)
+{
+       struct udevice *dev;
+       int ret;
+
+       ret = i2c_get_chip_for_busnum(0, chip_no, 1, &dev);
+       if (ret) {
+               pr_err("unable to get I2C bus. ret %d\n", ret);
+               return ret;
+       }
+       ret = dm_i2c_reg_write(dev, reg, val);
+       if (ret) {
+               pr_err("writing to twl4030 failed. ret %d\n", ret);
+               return ret;
+       }
+       return 0;
+}
+
+int twl4030_i2c_read_u8(u8 chip_no, u8 reg, u8 *valp)
+{
+       struct udevice *dev;
+       int ret;
+
+       ret = i2c_get_chip_for_busnum(0, chip_no, 1, &dev);
+       if (ret) {
+               pr_err("unable to get I2C bus. ret %d\n", ret);
+               return ret;
+       }
+       ret = dm_i2c_reg_read(dev, reg);
+       if (ret < 0) {
+               pr_err("reading from twl4030 failed. ret %d\n", ret);
+               return ret;
+       }
+       *valp = (u8)ret;
+       return 0;
+}
+#endif