linux-kernel - Re: [PATCH 02/12] pinctrl: samsung: Add Exynos850 SoC specific data

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Message-ID: <CAPLW+4=ewQf8_hMKFFqPRaoqQxhRZZ1=NGboLstvVBOYcTc3aw@mail.gmail.com>
Date:   Mon, 2 Aug 2021 22:24:22 +0300
From:   Sam Protsenko <semen.protsenko@...aro.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
Cc:     Sylwester Nawrocki <s.nawrocki@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Tomasz Figa <tomasz.figa@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Stephen Boyd <sboyd@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Jiri Slaby <jirislaby@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Charles Keepax <ckeepax@...nsource.wolfsonmicro.com>,
        Ryu Euiyoul <ryu.real@...sung.com>,
        Tom Gall <tom.gall@...aro.org>,
        Sumit Semwal <sumit.semwal@...aro.org>,
        John Stultz <john.stultz@...aro.org>,
        Amit Pundir <amit.pundir@...aro.org>,
        devicetree <devicetree@...r.kernel.org>,
        linux-arm Mailing List <linux-arm-kernel@...ts.infradead.org>,
        linux-clk <linux-clk@...r.kernel.org>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Samsung SOC <linux-samsung-soc@...r.kernel.org>,
        "open list:SERIAL DRIVERS" <linux-serial@...r.kernel.org>
Subject: Re: [PATCH 02/12] pinctrl: samsung: Add Exynos850 SoC specific data

On Fri, 30 Jul 2021 at 18:22, Krzysztof Kozlowski
<krzysztof.kozlowski@...onical.com> wrote:
>
> On 30/07/2021 16:49, Sam Protsenko wrote:
> > Add Samsung Exynos850 SoC specific data to enable pinctrl support for
> > all platforms based on Exynos850.
> >
> > Signed-off-by: Sam Protsenko <semen.protsenko@...aro.org>
> > ---
> >  .../pinctrl/samsung/pinctrl-exynos-arm64.c    | 129 ++++++++++++++++++
> >  drivers/pinctrl/samsung/pinctrl-exynos.h      |  29 ++++
> >  drivers/pinctrl/samsung/pinctrl-samsung.c     |   2 +
> >  drivers/pinctrl/samsung/pinctrl-samsung.h     |   1 +
> >  4 files changed, 161 insertions(+)
> >
> > diff --git a/drivers/pinctrl/samsung/pinctrl-exynos-arm64.c b/drivers/pinctrl/samsung/pinctrl-exynos-arm64.c
> > index b6e56422a700..9c71ff84ba7e 100644
> > --- a/drivers/pinctrl/samsung/pinctrl-exynos-arm64.c
> > +++ b/drivers/pinctrl/samsung/pinctrl-exynos-arm64.c
> > @@ -40,6 +40,24 @@ static const struct samsung_pin_bank_type exynos5433_bank_type_alive = {
> >       .reg_offset = { 0x00, 0x04, 0x08, 0x0c, },
> >  };
> >
> > +/*
> > + * Bank type for non-alive type. Bit fields:
> > + * CON: 4, DAT: 1, PUD: 4, DRV: 4, CONPDN: 2, PUDPDN: 4
> > + */
> > +static struct samsung_pin_bank_type exynos850_bank_type_off  = {
> > +     .fld_width = { 4, 1, 4, 4, 2, 4, },
> > +     .reg_offset = { 0x00, 0x04, 0x08, 0x0c, 0x10, 0x14, },
> > +};
> > +
> > +/*
> > + * Bank type for alive type. Bit fields:
> > + * CON: 4, DAT: 1, PUD: 4, DRV: 4
> > + */
> > +static struct samsung_pin_bank_type exynos850_bank_type_alive = {
> > +     .fld_width = { 4, 1, 4, 4, },
> > +     .reg_offset = { 0x00, 0x04, 0x08, 0x0c, },
> > +};
> > +
> >  /* Pad retention control code for accessing PMU regmap */
> >  static atomic_t exynos_shared_retention_refcnt;
> >
> > @@ -422,3 +440,114 @@ const struct samsung_pinctrl_of_match_data exynos7_of_data __initconst = {
> >       .ctrl           = exynos7_pin_ctrl,
> >       .num_ctrl       = ARRAY_SIZE(exynos7_pin_ctrl),
> >  };
> > +
> > +/* pin banks of exynos850 pin-controller 0 (ALIVE) */
> > +static struct samsung_pin_bank_data exynos850_pin_banks0[] = {
> > +     /* Must start with EINTG banks, ordered by EINT group number. */
> > +     EXYNOS9_PIN_BANK_EINTW(8, 0x000, "gpa0", 0x00),
>
> Why EXYNOS9 not EXYNOS850? Is it really shared with 96xx, 98xx and 9x0
> series?
>

Yeah, I double checked and those macros are actually used for 96xx
SoCs. So I suggest we leave it as is, as it seems to be related to the
whole architecture series, not only to Exynos850.

> > +     EXYNOS9_PIN_BANK_EINTW(8, 0x020, "gpa1", 0x04),
> > +     EXYNOS9_PIN_BANK_EINTW(8, 0x040, "gpa2", 0x08),
> > +     EXYNOS9_PIN_BANK_EINTW(8, 0x060, "gpa3", 0x0c),
> > +     EXYNOS9_PIN_BANK_EINTW(4, 0x080, "gpa4", 0x10),
> > +     EXYNOS9_PIN_BANK_EINTN(3, 0x0A0, "gpq0"),
> > +};
> > +
> > +/* pin banks of exynos850 pin-controller 1 (CMGP) */
> > +static struct samsung_pin_bank_data exynos850_pin_banks1[] = {
> > +     /* Must start with EINTG banks, ordered by EINT group number. */
> > +     EXYNOS9_PIN_BANK_EINTW(1, 0x000, "gpm0", 0x00),
> > +     EXYNOS9_PIN_BANK_EINTW(1, 0x020, "gpm1", 0x04),
> > +     EXYNOS9_PIN_BANK_EINTW(1, 0x040, "gpm2", 0x08),
> > +     EXYNOS9_PIN_BANK_EINTW(1, 0x060, "gpm3", 0x0C),
> > +     EXYNOS9_PIN_BANK_EINTW(1, 0x080, "gpm4", 0x10),
> > +     EXYNOS9_PIN_BANK_EINTW(1, 0x0A0, "gpm5", 0x14),
> > +     EXYNOS9_PIN_BANK_EINTW(1, 0x0C0, "gpm6", 0x18),
> > +     EXYNOS9_PIN_BANK_EINTW(1, 0x0E0, "gpm7", 0x1C),
> > +};
> > +
> > +/* pin banks of exynos850 pin-controller 2 (AUD) */
> > +static struct samsung_pin_bank_data exynos850_pin_banks2[] = {
> > +     /* Must start with EINTG banks, ordered by EINT group number. */
> > +     EXYNOS9_PIN_BANK_EINTG(5, 0x000, "gpb0", 0x00),
> > +     EXYNOS9_PIN_BANK_EINTG(5, 0x020, "gpb1", 0x04),
> > +};
> > +
> > +/* pin banks of exynos850 pin-controller 3 (HSI) */
> > +static struct samsung_pin_bank_data exynos850_pin_banks3[] = {
> > +     /* Must start with EINTG banks, ordered by EINT group number. */
> > +     EXYNOS9_PIN_BANK_EINTG(6, 0x000, "gpf2", 0x00),
> > +};
> > +
> > +/* pin banks of exynos850 pin-controller 4 (CORE) */
> > +static struct samsung_pin_bank_data exynos850_pin_banks4[] = {
> > +     /* Must start with EINTG banks, ordered by EINT group number. */
> > +     EXYNOS9_PIN_BANK_EINTG(4, 0x000, "gpf0", 0x00),
> > +     EXYNOS9_PIN_BANK_EINTG(8, 0x020, "gpf1", 0x04),
> > +};
> > +
> > +/* pin banks of exynos850 pin-controller 5 (PERI) */
> > +static struct samsung_pin_bank_data exynos850_pin_banks5[] = {
> > +     /* Must start with EINTG banks, ordered by EINT group number. */
> > +     EXYNOS9_PIN_BANK_EINTG(2, 0x000, "gpg0", 0x00),
> > +     EXYNOS9_PIN_BANK_EINTG(6, 0x020, "gpp0", 0x04),
> > +     EXYNOS9_PIN_BANK_EINTG(4, 0x040, "gpp1", 0x08),
> > +     EXYNOS9_PIN_BANK_EINTG(4, 0x060, "gpp2", 0x0C),
> > +     EXYNOS9_PIN_BANK_EINTG(8, 0x080, "gpg1", 0x10),
> > +     EXYNOS9_PIN_BANK_EINTG(8, 0x0A0, "gpg2", 0x14),
> > +     EXYNOS9_PIN_BANK_EINTG(1, 0x0C0, "gpg3", 0x18),
> > +     EXYNOS9_PIN_BANK_EINTG(3, 0x0E0, "gpc0", 0x1C),
> > +     EXYNOS9_PIN_BANK_EINTG(6, 0x100, "gpc1", 0x20),
> > +};
> > +
> > +static const struct samsung_pin_ctrl exynos850_pin_ctrl[] __initconst = {
> > +     {
> > +             /* pin-controller instance 0 ALIVE data */
> > +             .pin_banks      = exynos850_pin_banks0,
> > +             .nr_banks       = ARRAY_SIZE(exynos850_pin_banks0),
> > +             .eint_gpio_init = exynos_eint_gpio_init,
> > +             .eint_wkup_init = exynos_eint_wkup_init,
> > +             .suspend        = exynos_pinctrl_suspend,
> > +             .resume         = exynos_pinctrl_resume,
>
> I guess retention registers will follow sometime later.
>

Good point, never noticed retention control is needed for
suspend/resume to work properly. I will remove suspend/resume ops in
v2, and PM support will be sent later.

> Best regards,
> Krzysztof