Hi Geert, On Wed, Nov 07, 2018 at 09:39:35AM +0100, Geert Uytterhoeven wrote: > Hi Jacopo, > > (sorry, seems I prepared a reply, but forgot to press "Send") > > On Tue, Nov 6, 2018 at 10:31 AM jacopo mondi wrote: > > On Tue, Nov 06, 2018 at 10:24:30AM +0100, Geert Uytterhoeven wrote: > > > On Tue, Nov 6, 2018 at 10:08 AM jacopo mondi wrote: > > > > On Mon, Nov 05, 2018 at 06:19:22PM +0100, Geert Uytterhoeven wrote: > > > > > On Mon, Oct 29, 2018 at 7:14 PM Jacopo Mondi wrote: > > > > > > this two patches add supports for VIN4 and VIN5 interfaces to R-Car M3-N. > > > > > > > > > > > > On this SoC (and in the forthcoming support for E3 R8A77990) the VIN groups > > > > > > could appear on different sets of pins, usually the 'a' and 'b' one. > > > > > > > > > > > > With the existing VIN_DATA_PIN_GROUP macro we have to specify group names as: > > > > > > > > > > > > VIN_DATA_PIN_GROUP(vin4_data_a, 8) > > > > > > > > > > > > which results in the group being named as "vin4_data_a_8" which is > > > > > > un-consistent with the canonical group names (eg. "vin4_data8_a"). > > > > > > > > > > > > This series adds a macro that allows to specify the group 'version' along with > > > > > > the pin and mux numbers in patch [1/1]. I haven't been able to find a better > > > > > > term than 'version' as 'group' was already taken. Suggestions welcome. > > > > > > > > > > Yeah, the datasheet also calls these groups :-( > > > > > A possible alternative is to use "variant"? > > > > > > > > > > Or, what about avoiding the name issue by making the VIN_DATA_PIN_GROUP() > > > > > macro varargs, and passing the "variant" as the (optional) third parameter? > > > > > That way existing users work as a before, while you can also write e.g. > > > > > > > > > > VIN_DATA_PIN_GROUP_VER(vin4_data, 8, _a), > > > > > > > > Indeed. > > > > > > > > Would something along the following lines fly for you? > > > > > > > > #define VIN_DATA_PIN_GROUP(n, s, ...) \ > > > > { \ > > > > .name = #n#s#__VA_ARGS__, \ > > > > .pins = n##__VA_ARGS__##_pins.data##s, \ > > > > .mux = n##__VA_ARGS__##_mux.data##s, \ > > > > .nr_pins = ARRAY_SIZE(n##__VA_ARGS__##_pins.data##s), \ > > > > } > > > > > > > > It can be used as: > > > > VIN_DATA_PIN_GROUP(vin4_data, 8, _a), > > > > VIN_DATA_PIN_GROUP(vin5_data, 8), > > > > > > > > With your ack on this, I'll send v2. > > > > > > Thank you, that is exactly what I had in mind. > > > > > > > > > As I cannot test VIN4 nor VIN5 on Salvator-XS as the parallel pins are not > > > > > > wired, I made sure the macro creates correct names and fields not only by > > > > > > compile testing it, but with a small C program [1] that replicates the VIN data > > > > > > layout defined in the PFC module and access fields (and has helped me testing > > > > > > more easily the preprocessor stringification/concatenation process). > > > > > > > > > > > > Final note: Simon, you took the E3 patches in your tree, and I expect them to > > > > > > land on v4.20-rc1. They use the old macros, are follow up patches ok?) > > > > > > > > > > Which patches are using these macro names, and are in v4.20-rc1? > > > > > > > > > > BTW, "grep vin._data_[a-z][0-9] drivers/pinctrl/sh-pfc/*o" tells me we already > > > > > have broken groups names on r8a7792, r8a7795, and r8a7796. > > > > > Fortunately we have no known users of them, so they can be fixed. > > > > > > > > > > > > > On v4.20-rc1 the grep returns none for me :/ > > > > git grep v4.20-rc1 "vin._data_[a-z][0-9]" drivers/pinctrl/sh-pfc/ > > > > > > I grepped the .o files, to make sure it would see the final strings, which > > > obviously works in the build tree only ;-) > > > > Ah yes, stupid me. > > > > > > > > For the source tree, please try: > > > > > > git grep -w VIN_DATA_PIN_GROUP.*_[a-z] v4.20-rc1 > > > > Argh, there are quite a few of them, but fortunately no users so far. > > > > Is it ok fixing them in v2 of this series with follow-up patches, or > > would you like a single patch that introduces the variadic macro and > > replaces all the occurrences in the per-SoC PFC modules in one go? > > Given the r8a7795 and r8a7796 issues were introduced in v4.17: > > a5c2949ff7bd9e04 ("pinctrl: sh-pfc: r8a7796: Deduplicate VIN4 pin > definitions") > 9942a5b52990b8d5 ("pinctrl: sh-pfc: r8a7795: Deduplicate VIN4 pin > definitions") > > while the r8a7792 issue date back to v4.9: > > 7dd74bb1f058786e ("pinctrl: sh-pfc: r8a7792: Add VIN pin groups") > > I think separate patches are easier for backporting. Fine, I've sent yesterday: "[PATCH v4 0/4] sh-pfc: Variadic VIN_DATA_PIN_GROUP macro + updates" which includes: "pinctrl: sh-pfc: Fix VIN versioned groups name" that changes all users of VIN_DATA_PIN_GROUP in one go. I'll split that and re-send. Before resending, if there are comments on: "pinctrl: sh-pfc: r8a77965: Add VIN[4|5] groups/functions" and "pinctrl: sh-pfc: r8a77990: Add VIN[4|5] groups/functions" which are included in that very same series, I'll like to address them before sending v5 out. Thanks j > > Thanks! > > Gr{oetje,eeting}s, > > Geert > > -- > Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org > > In personal conversations with technical people, I call myself a hacker. But > when I'm talking to journalists I just say "programmer" or something like that. > -- Linus Torvalds