Re: [PATCH 3/5] iTCO_wdt: Add support for TCO on Intel Sunrisepoint

Jean Delvare
2015-07-29T06:44:37Z

Hi Matt,

Le Monday 27 July 2015 à 14:38 +0100, Matt Fleming a écrit :
> From: Matt Fleming <matt.fleming@intel.com>
>
> The revision of the watchdog hardware in Sunrisepoint necessitates a new
> "version" inside the TCO watchdog driver because some of the register
> layouts have changed.
>
> Cc: Wim Van Sebroeck <wim@iguana.be>
> Signed-off-by: Matt Fleming <matt.fleming@intel.com>
> ---
> drivers/watchdog/iTCO_wdt.c | 58 ++++++++++++++++++++++++++-------------------
> 1 file changed, 34 insertions(+), 24 deletions(-)
>
> diff --git a/drivers/watchdog/iTCO_wdt.c b/drivers/watchdog/iTCO_wdt.c
> index 9a6e70976f64..17dfbc51b85a 100644
> --- a/drivers/watchdog/iTCO_wdt.c
> +++ b/drivers/watchdog/iTCO_wdt.c
> (...)
> @@ -503,7 +510,10 @@ static int iTCO_wdt_probe(struct platform_device *dev)
> pdata->name, pdata->iTCO_version, (u64)TCOBASE);
>
> /* Clear out the (probably old) status */
> - if (iTCO_wdt_private.iTCO_version == 3) {
> + if (iTCO_wdt_private.iTCO_version == 4) {
> + outw(0x0008, TCO1_STS); /* Clear the Time Out Status bit */
> + outw(0x0002, TCO2_STS); /* Clear SECOND_TO_STS bit */
> + } else if (iTCO_wdt_private.iTCO_version == 3) {
> outl(0x20008, TCO1_STS);
> } else {
> outw(0x0008, TCO1_STS); /* Clear the Time Out Status bit */

The "version == 4" branch is a subset of the "else" branch, so you could
merge both with a conditional. If you prefer not to, then it probably
makes sense to change the whole block to a switch/case construct.

--
Jean Delvare
SUSE L3 Support