Re: [PATCHv3] usb: typec: tps6598x: handle block writes separately with plain-I2C adapters

From: Nikolaus Voss
Date: Thu Feb 21 2019 - 03:41:50 EST


Hi Guenther,

On Wed, 20 Feb 2019, Guenter Roeck wrote:
On 2/20/19 7:11 AM, Nikolaus Voss wrote:
From: Nikolaus Voss <nikolaus.voss@xxxxxxxxxxxxxxxxxxxxx>

Commit 1a2f474d328f handles block _reads_ separately with plain-I2C
adapters, but the problem described with regmap-i2c not handling
SMBus block transfers (i.e. read and writes) correctly also exists
with writes.

As workaround, this patch adds a block write function the same way
1a2f474d328f adds a block read function.

Fixes: 1a2f474d328f ("usb: typec: tps6598x: handle block reads separately with plain-I2C adapters")
Fixes: 0a4c005bd171 ("usb: typec: driver for TI TPS6598x USB Power Delivery controllers")
Signed-off-by: Nikolaus Voss <nikolaus.voss@xxxxxxxxxxxxxxxxxxxxx>

Reviewed-by: Guenter Roeck <linux@xxxxxxxxxxxx>

Note that tps6598x_exec_cmd() is only called with in_len == out_len == 0
and NULL data pointers.

That's probably why I didn't notice I missed patching tps6598x_exec_cmd() in spite of running and testing the driver for half a year ;-).

Thanks,
Nikolaus