From 34760be0d688b146a0641eb3bcfd2df2343b6ce9 Mon Sep 17 00:00:00 2001 From: Daniel Scally <djrscally@gmail.com> Date: Sun, 10 Oct 2021 20:57:02 +0200 Subject: [PATCH 23/41] platform/x86: int3472: Enable I2c daisy chain 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. Signed-off-by: Daniel Scally <djrscally@gmail.com> Patchset: cameras --- drivers/platform/x86/intel/int3472/tps68470.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/platform/x86/intel/int3472/tps68470.c b/drivers/platform/x86/intel/int3472/tps68470.c index 1e107fd49f82..e3e1696e7f0e 100644 --- a/drivers/platform/x86/intel/int3472/tps68470.c +++ b/drivers/platform/x86/intel/int3472/tps68470.c @@ -46,6 +46,13 @@ 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; -- 2.41.0