Re: [PATCH v2 17/22] watchdog: ziirave_wdt: Fix DOWNLOAD_END payload

From: Guenter Roeck
Date: Thu Aug 15 2019 - 14:23:34 EST


On Mon, Aug 12, 2019 at 01:09:01PM -0700, Andrey Smirnov wrote:
> Bootloader firmware expects the following traffic for DOWNLOAD_END:
>
> S Addr Wr [A] 0x11 [A] P
>
> using ziirave_firm_write_byte() will result in
>
> S Addr Wr [A] 0x11 [A] 0x01 [A] 0x01 [A] P
>
> which happens to work because firmware will ignore any extra bytes
> sent. Fix this by converting the code to use i2c_smbus_write_byte()
> instead.
>
> Signed-off-by: Andrey Smirnov <andrew.smirnov@xxxxxxxxx>
> Cc: Chris Healy <cphealy@xxxxxxxxx>
> Cc: Guenter Roeck <linux@xxxxxxxxxxxx>
> Cc: Rick Ramstetter <rick@xxxxxxxxxxxxxxx>
> Cc: linux-watchdog@xxxxxxxxxxxxxxx
> Cc: linux-kernel@xxxxxxxxxxxxxxx

Reviewed-by: Guenter Roeck <linux@xxxxxxxxxxxx>