Re: [PATCH V2 0/3] watchdog: stm32: add dynamic prescaler support

[Guenter Roeck <linux@roeck-us.net>]

On Thu, May 02, 2019 at 04:08:43PM +0200, Ludovic Barre wrote:
> From: Ludovic Barre <ludovic.barre@st.com>
> 
> This patch series updates stm32 watchdog driver on:
> -use devm_watchdog_register_device
> -Guenter's recommendation about return value:
> set_timeout return 0 on succes, -EINVAL for "parameter out of range"
> and -EIO for "could not write value to the watchdog".

No, sorry, that is not what I meant.

set_timeout() should set ->timeout either to the requested value
if equal to or larger than the maximum timeout supported by the
hardware, and to the actually selected timeout otherwise.

Guenter

> Set of reload and prescaler registers are stay in start function,
> because the stm32 watchdog must be enabled to write these registers.
> -adds dynamic prescaler support
> 
> Ludovic Barre (3):
>   watchdog: stm32: update to devm_watchdog_register_device
>   watchdog: stm32: update return values recommended by watchdog kernel
>     api
>   watchdog: stm32: add dynamic prescaler support
> 
>  drivers/watchdog/stm32_iwdg.c | 96 ++++++++++++++++++++++++-------------------
>  1 file changed, 54 insertions(+), 42 deletions(-)
> 
> -- 
> 2.7.4
>