[PATCH 04/11] soc: renesas: rcar-sysc: add R8A77970 support

[Geert Uytterhoeven]

Hi Sergei,

On Tue, Sep 12, 2017 at 10:37 PM, Sergei Shtylyov
<sergei.shtylyov at cogentembedded.com> wrote:
> Add support for R-Car V3M (R8A77970) SoC power areas to the R-Car SYSC
> driver.
>
> Based on the original (and large) patch by Daisuke Matsushita
> <daisuke.matsushita.ns at hitachi.com>.
>
> Signed-off-by: Vladimir Barinov <vladimir.barinov at cogentembedded.com>
> Signed-off-by: Sergei Shtylyov <sergei.shtylyov at cogentembedded.com>

> --- /dev/null
> +++ renesas/drivers/soc/renesas/r8a77970-sysc.c
> @@ -0,0 +1,39 @@

> +#include <linux/bug.h>

I think this include is no longer needed since commit c7acec713d14c6ce
("kernel.h: handle pointers to arrays better in container_of()").

> +static const struct rcar_sysc_area r8a77970_areas[] __initconst = {

> +       { "a3ir",       0x180, 0, R8A77970_PD_A3IR,     R8A77970_PD_ALWAYS_ON },
> +       { "a2ir0",      0x400, 0, R8A77970_PD_A2IR0,    R8A77970_PD_ALWAYS_ON },
> +       { "a2ir1",      0x400, 1, R8A77970_PD_A2IR1,    R8A77970_PD_A2IR0 },
> +       { "a2ir2",      0x400, 2, R8A77970_PD_A2IR2,    R8A77970_PD_A2IR0 },
> +       { "a2ir3",      0x400, 3, R8A77970_PD_A2IR3,    R8A77970_PD_A2IR0 },
> +       { "a2sc0",      0x400, 4, R8A77970_PD_A2SC0,    R8A77970_PD_ALWAYS_ON },
> +       { "a2sc1",      0x400, 5, R8A77970_PD_A2SC1,    R8A77970_PD_A2SC0 },

According to Figure 9.2(b) "Power domain structure (R-Car V3M)" and Table 9.4
"Power domains", all of A2IR[0-3] and A2SC[01] are direct children of A3IR.

BTW, the bit indices "4" resp. "5" for A2SC[01] don't match Section 9.2.5
"Power Control Registers for A2IR" (which uses "0" resp. "1"), but I assume
that's just a typo in the datasheet, as those would conflict with A2IR[01], and
the would conflict with the documentation for other R-Car Gen3 SoCs.

With the above fixed:
Reviewed-by: Geert Uytterhoeven <geert+renesas at glider.be>

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert at 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