Thanks (again) for review Guenter! On Thu, 2020-09-17 at 22:45 -0700, Guenter Roeck wrote: > On 9/17/20 1:03 AM, Matti Vaittinen wrote: > > Add Watchdog support for ROHM BD9576MUF and BD9573MUF PMICs which > > are > > mainly used to power the R-Car series processors. The watchdog is > > pinged using a GPIO and enabled using another GPIO. Additionally > > watchdog time-out can be configured to HW prior starting the > > watchdog. > > Watchdog timeout can be configured to detect only delayed ping or > > in > > a window mode where also too fast pings are detected. > > > > Signed-off-by: Matti Vaittinen <matti.vaitti...@fi.rohmeurope.com> > > --- > > drivers/watchdog/Kconfig | 13 ++ > > drivers/watchdog/Makefile | 1 + > > drivers/watchdog/bd9576_wdt.c | 295 > > ++++++++++++++++++++++++++++++++++ > > 3 files changed, 309 insertions(+) > > create mode 100644 drivers/watchdog/bd9576_wdt.c
> > > + > > + ret = of_property_read_u32(np, > > + "hw_margin_ms", &hw_margin); > > Line splits are arbitrary. Why is this "hw_margin_ms" and not > "rohm,hw_margin_ms" ? "hw_margin_ms" is an existing binding for specifying the maximum TMO in HW (if I understood it correctly). (It is used at least by the generig GPIO watchdog) I thought it's better to not invent a new vendor specific binding when we have a generic one. https://elixir.bootlin.com/linux/v5.9-rc2/source/Documentation/devicetree/bindings/watchdog/gpio-wdt.txt > > > + if (ret) { > > + if (ret != -EINVAL) > > + return ret; > > + > > + hw_margin = BD957X_WDT_DEFAULT_MARGIN; > > + } > > + > > + ret = of_property_read_u32(np, "rohm,hw-margin-min-ms", > > &hw_margin_min); > > + if (ret == -EINVAL) > > + hw_margin_min = 0; > > + else if (ret) > > + return ret; > > Please use a single mechanism to handle -EINVAL after > of_property_read_u32(). Sorry Guenter - I am probably a bit slow today but I am unsure if I understand the suggestion. Do you mean something like: hw_margin_min = 0; ret = of_property_read_u32(np, "rohm,hw-margin-min-ms", &hw_margin_min); if (ret && ret != -EINVAL) return ret; Other than that - all findings are clear to me. I'll craft a new version but I'll wait for a while to see if Lee has time to send some feedback on MFD so I could get both WDG and MFD fixes to same version :) Best Regards --Matti -- Matti Vaittinen, Linux device drivers ROHM Semiconductors, Finland SWDC Kiviharjunlenkki 1E 90220 OULU FINLAND ~~~ "I don't think so," said Rene Descartes. Just then he vanished ~~~ Simon says - in Latin please. "non cogito me" dixit Rene Descarte, deinde evanescavit (Thanks for the translation Simon)
