On Wed, 27 Aug 2014, Guenter Roeck wrote:
> On Wed, Aug 27, 2014 at 12:13:56AM +0200, Beniamino Galvani wrote:
> > This adds a driver for the watchdog timer available in Ricoh RN5T618
> > PMIC. The device supports a programmable expiration time of 1, 8, 32
> > or 128 seconds.
> >
> > Signed-off-by: Beniamino Galvani <b.galvani@xxxxxxxxx>
> > ---
> > drivers/watchdog/Kconfig | 11 +++
> > drivers/watchdog/Makefile | 1 +
> > drivers/watchdog/rn5t618_wdt.c | 196 ++++++++++++++++++++++++++++++++++++++++
> > include/linux/mfd/rn5t618.h | 4 +
> > 4 files changed, 212 insertions(+)
> > create mode 100644 drivers/watchdog/rn5t618_wdt.c
[...]
> > +++ b/drivers/watchdog/rn5t618_wdt.c
> > @@ -0,0 +1,196 @@
[...]
> > +static int rn5t618_wdt_set_timeout(struct watchdog_device *wdt_dev,
> > + unsigned int timeout)
> > +{
> > + struct rn5t618_wdt *wdt = watchdog_get_drvdata(wdt_dev);
> > + int ret, i;
> > +
> > + for (i = 0; i < ARRAY_SIZE(rn5t618_wdt_map); i++) {
> > + if (rn5t618_wdt_map[i].time + 1 >= timeout)
> > + break;
> > + }
> > +
> > + if (i == ARRAY_SIZE(rn5t618_wdt_map))
> > + ret = -EINVAL;
>
> Can you simplify this a bit ? If you use
>
> if (i == ARRAY_SIZE(rn5t618_wdt_map))
> return -EINVAL;
This changes the semantics.
> > + else
>
> You can drop this else statement.
>
> > + ret = regmap_update_bits(wdt->rn5t618->regmap, RN5T618_WATCHDOG,
> > + RN5T618_WATCHDOG_WDOGTIM_M,
> > + rn5t618_wdt_map[i].reg_val);
> > + if (!ret)
> > + wdt_dev->timeout = rn5t618_wdt_map[i].time;
... Isn't this important?
> > + return ret;
> > +}
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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