From 5c8e3ab146de92800d516386cbb7040c90210b27 Mon Sep 17 00:00:00 2001 From: Wolfram Sang Date: Sun, 28 May 2017 11:30:45 +0200 Subject: i2c: use proper name for the R-Car SoC It is 'R-Car', not 'RCar'. No code or binding changes, only descriptive text. Signed-off-by: Wolfram Sang Acked-by: Geert Uytterhoeven Signed-off-by: Wolfram Sang --- drivers/i2c/busses/i2c-rcar.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/i2c/busses/i2c-rcar.c') diff --git a/drivers/i2c/busses/i2c-rcar.c b/drivers/i2c/busses/i2c-rcar.c index 214bf2835d1f..214a71cb6442 100644 --- a/drivers/i2c/busses/i2c-rcar.c +++ b/drivers/i2c/busses/i2c-rcar.c @@ -1,5 +1,5 @@ /* - * Driver for the Renesas RCar I2C unit + * Driver for the Renesas R-Car I2C unit * * Copyright (C) 2014-15 Wolfram Sang * Copyright (C) 2011-2015 Renesas Electronics Corporation -- cgit v1.2.3 From b395ba21699dbbca2dbf05833a71f5fbf5245a3f Mon Sep 17 00:00:00 2001 From: Wolfram Sang Date: Mon, 19 Jun 2017 23:41:46 +0200 Subject: i2c: rcar: document HW incapabilities Add recent findings (IGNORE_NAK) and document in a bit more detail why the feature is not possible. Signed-off-by: Wolfram Sang Signed-off-by: Wolfram Sang --- drivers/i2c/busses/i2c-rcar.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'drivers/i2c/busses/i2c-rcar.c') diff --git a/drivers/i2c/busses/i2c-rcar.c b/drivers/i2c/busses/i2c-rcar.c index 214a71cb6442..030952e2ddc7 100644 --- a/drivers/i2c/busses/i2c-rcar.c +++ b/drivers/i2c/busses/i2c-rcar.c @@ -783,7 +783,12 @@ static int rcar_unreg_slave(struct i2c_client *slave) static u32 rcar_i2c_func(struct i2c_adapter *adap) { - /* This HW can't do SMBUS_QUICK and NOSTART */ + /* + * This HW can't do: + * I2C_SMBUS_QUICK (setting FSB during START didn't work) + * I2C_M_NOSTART (automatically sends address after START) + * I2C_M_IGNORE_NAK (automatically sends STOP after NAK) + */ return I2C_FUNC_I2C | I2C_FUNC_SLAVE | (I2C_FUNC_SMBUS_EMUL & ~I2C_FUNC_SMBUS_QUICK); } -- cgit v1.2.3