Hi Pavel, > El 23 feb 2021, a las 9:34, Pavel Machek <pavel@xxxxxx> escribió: > > On Tue 2021-02-23 09:17:31, Álvaro Fernández Rojas wrote: >> This is proven to work in BMIPS BE/LE and ARM BE/LE, as used in bcm2835-rng >> and bcmgenet drivers. >> Both should also be inline functions. > > > >> -#ifdef CONFIG_CPU_BIG_ENDIAN >> - iowrite32be(data, reg); >> -#else >> - writel(data, reg); >> -#endif >> + /* MIPS chips strapped for BE will automagically configure the >> + * peripheral registers for CPU-native byte order. >> + */ > > Bad comment style. I just wanted to copy the same comment as the one in bcm2835-rng and bcmgenet… https://github.com/torvalds/linux/blob/3b9cdafb5358eb9f3790de2f728f765fef100731/drivers/char/hw_random/bcm2835-rng.c#L42-L60 https://github.com/torvalds/linux/blob/3b9cdafb5358eb9f3790de2f728f765fef100731/drivers/net/ethernet/broadcom/genet/bcmgenet.c#L71-L88 > >> + if (IS_ENABLED(CONFIG_MIPS) && IS_ENABLED(CONFIG_CPU_BIG_ENDIAN)) >> + __raw_writel(data, reg); >> + else >> + writel_relaxed(data, reg); >> } > > Code does not match comment (still need to do conversion on > non-MIPS?), and it certainly should not be here (do all mipsen behave > like that?!), and it really should not be converting to _relaxed at > the same time. I think it's because non-MIPS BE exposes that as little endian, but Florian can probably help us with that… > > Best regards, > Pavel > -- > http://www.livejournal.com/~pavelmachek Best regards, Álvaro.
