From: Daniel Scally <djrscally@xxxxxxxxx>
The TPS68470 PMIC has an I2C passthrough mode through which I2C traffic
can be forwarded to a device connected to the PMIC as though it were
connected directly to the system bus. Enable this mode when the chip
is initialised.
Reviewed-by: Andy Shevchenko <andy.shevchenko@xxxxxxxxx>
Signed-off-by: Daniel Scally <djrscally@xxxxxxxxx>
---
.../x86/intel/int3472/intel_skl_int3472_tps68470.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/platform/x86/intel/int3472/intel_skl_int3472_tps68470.c b/drivers/platform/x86/intel/int3472/intel_skl_int3472_tps68470.c
index c05b4cf502fe..42e688f4cad4 100644
--- a/drivers/platform/x86/intel/int3472/intel_skl_int3472_tps68470.c
+++ b/drivers/platform/x86/intel/int3472/intel_skl_int3472_tps68470.c
@@ -45,6 +45,13 @@ static int tps68470_chip_init(struct device *dev, struct regmap *regmap)
return ret;
}
+ /* Enable I2C daisy chain */
+ ret = regmap_write(regmap, TPS68470_REG_S_I2C_CTL, 0x03);
+ if (ret) {
+ dev_err(dev, "Failed to enable i2c daisy chain\n");
+ return ret;
+ }
+
dev_info(dev, "TPS68470 REVID: 0x%02x\n", version);
return 0;
--
2.33.1
