Re: [PATCH 3/3] pinctrl: mediatek: mt8901: Add pinctrl driver for MT8901

[Deep Pani <Deep.Pani@mediatek.com>]

Hi Angelo,

Are there any updates from your side?

Thanks and Regards,
Deep Pani

On Fri, 2026-03-27 at 21:41 +0800, Deep Pani wrote:
> Hi Angelo,
> 
> MT8901 doesn't use devicetree for gpio pin configuration. ACPI ASL
> macros are declared in the device's _CRS methods to define exact
> configuration for the gpio pins.
> 
> We have and will always make sure ACPI is all good on this platform.
> 
> Thanks and Regards,
> Deep Pani
> 
> On Thu, 2026-03-26 at 12:36 +0000, Fred-WY Chen (陳威宇) wrote:
> > On Tue, 2025-11-25 at 10:56 +0100, AngeloGioacchino Del Regno
> > wrote:
> > > 
> > > External email : Please do not click links or open attachments
> > > until
> > > you have verified the sender or the content.
> > > 
> > > 
> > > Il 25/11/25 03:36, Lei Xue ha scritto:
> > > > Add mt8901 pinctrl, gpio and eint driver implementation.
> > > > 
> > > > Signed-off-by: Lei Xue <lei.xue@mediatek.com>
> > > > ---
> > > >   drivers/pinctrl/mediatek/Kconfig              |   12 +
> > > >   drivers/pinctrl/mediatek/Makefile             |    1 +
> > > >   drivers/pinctrl/mediatek/mtk-eint.c           |    4 +
> > > >   drivers/pinctrl/mediatek/mtk-eint.h           |    1 +
> > > >   drivers/pinctrl/mediatek/pinctrl-mt8901.c     | 1460
> > > > +++++++++++
> > > >   drivers/pinctrl/mediatek/pinctrl-mtk-mt8901.h | 2130
> > > > +++++++++++++++++
> > > >   6 files changed, 3608 insertions(+)
> > > >   create mode 100644 drivers/pinctrl/mediatek/pinctrl-mt8901.c
> > > >   create mode 100644 drivers/pinctrl/mediatek/pinctrl-mtk-
> > > > mt8901.h
> > > > 
> > > > diff --git a/drivers/pinctrl/mediatek/Kconfig
> > > > b/drivers/pinctrl/mediatek/Kconfig
> > > > index 4819617d9368..4820ae5197a0 100644
> > > > --- a/drivers/pinctrl/mediatek/Kconfig
> > > > +++ b/drivers/pinctrl/mediatek/Kconfig
> > > > @@ -321,6 +321,18 @@ config PINCTRL_MT8516
> > > >       default ARM64 && ARCH_MEDIATEK
> > > >       select PINCTRL_MTK
> > > > 
> > > > +config PINCTRL_MT8901
> > > > +     bool "MediaTek MT8901 pin control"
> > > > +     depends on ACPI
> > > > +     depends on ARM64 || COMPILE_TEST
> > > > +     default ARM64 && ARCH_MEDIATEK
> > > > +     select PINCTRL_MTK_PARIS
> > > > +     help
> > > > +       Say yes here to support pin controller and gpio driver
> > > > +       on MediaTek MT8901 SoC.
> > > > +       In MTK platform, we support virtual gpio and use it to
> > > > +       map specific eint which doesn't have real gpio pin.
> > > > +
> > > >   # For PMIC
> > > >   config PINCTRL_MT6397
> > > >       bool "MediaTek MT6397 pin control"
> > > > diff --git a/drivers/pinctrl/mediatek/Makefile
> > > > b/drivers/pinctrl/mediatek/Makefile
> > > > index ae765bd99965..57c69b1e5c2d 100644
> > > > --- a/drivers/pinctrl/mediatek/Makefile
> > > > +++ b/drivers/pinctrl/mediatek/Makefile
> > > > @@ -43,3 +43,4 @@ obj-$(CONFIG_PINCTRL_MT8196)               
> > > > +=
> > > > pinctrl-mt8196.o
> > > >   obj-$(CONFIG_PINCTRL_MT8365)                += pinctrl-
> > > > mt8365.o
> > > >   obj-$(CONFIG_PINCTRL_MT8516)                += pinctrl-
> > > > mt8516.o
> > > >   obj-$(CONFIG_PINCTRL_MT6397)                += pinctrl-
> > > > mt6397.o
> > > > +obj-$(CONFIG_PINCTRL_MT8901)         += pinctrl-mt8901.o
> > > > diff --git a/drivers/pinctrl/mediatek/mtk-eint.c
> > > > b/drivers/pinctrl/mediatek/mtk-eint.c
> > > > index c8c5097c11c4..b5a5beebf9cd 100644
> > > > --- a/drivers/pinctrl/mediatek/mtk-eint.c
> > > > +++ b/drivers/pinctrl/mediatek/mtk-eint.c
> > > > @@ -71,6 +71,10 @@ const unsigned int debounce_time_mt6878[] =
> > > > {
> > > >   };
> > > >   EXPORT_SYMBOL_GPL(debounce_time_mt6878);
> > > > 
> > > > +const unsigned int debounce_time_mt8901[] = {
> > > > +     156, 313, 625, 1250, 20000, 40000, 80000, 160000, 320000,
> > > > 640000, 0};
> > > > +EXPORT_SYMBOL_GPL(debounce_time_mt8901);
> > > > +
> > > >   static void __iomem *mtk_eint_get_offset(struct mtk_eint
> > > > *eint,
> > > >                                        unsigned int eint_num,
> > > >                                        unsigned int offset)
> > > > diff --git a/drivers/pinctrl/mediatek/mtk-eint.h
> > > > b/drivers/pinctrl/mediatek/mtk-eint.h
> > > > index 3cdd6f6310cd..1b185f660aff 100644
> > > > --- a/drivers/pinctrl/mediatek/mtk-eint.h
> > > > +++ b/drivers/pinctrl/mediatek/mtk-eint.h
> > > > @@ -53,6 +53,7 @@ extern const unsigned int
> > > > debounce_time_mt2701[];
> > > >   extern const unsigned int debounce_time_mt6765[];
> > > >   extern const unsigned int debounce_time_mt6795[];
> > > >   extern const unsigned int debounce_time_mt6878[];
> > > > +extern const unsigned int debounce_time_mt8901[];
> > > > 
> > > >   struct mtk_eint;
> > > > 
> > > > diff --git a/drivers/pinctrl/mediatek/pinctrl-mt8901.c
> > > > b/drivers/pinctrl/mediatek/pinctrl-mt8901.c
> > > > new file mode 100644
> > > > index 000000000000..77dec85fe29b
> > > > --- /dev/null
> > > > +++ b/drivers/pinctrl/mediatek/pinctrl-mt8901.c
> > > > @@ -0,0 +1,1460 @@
> > > > +// SPDX-License-Identifier: GPL-2.0
> > > > +/*
> > > > + * Copyright (C) 2025 MediaTek Inc.
> > > > + *
> > > > + */
> > > > +
> > > > +#include <linux/acpi.h>
> > > > +#include <linux/module.h>
> > > > +#include "pinctrl-mtk-mt8901.h"
> > > > +#include "pinctrl-paris.h"
> > > > +
> > > 
> > > ..snip..
> > > 
> > > > +static const char * const mt8901_pinctrl_register_base_name[]
> > > > =
> > > > {
> > > > +     "iocfg0", "iocfg_lt2", "iocfg_lt3", "iocfg_rt1",
> > > > "iocfg_rt2",
> > > > "iocfg_rt3",
> > > > +     "iocfg_tr", "iocfg_rt0", "iocfg_lt1", "iocfg_lb",
> > > > "iocfg_rb",
> > > > +};
> > > > +
> > > > +static const struct mtk_eint_hw mt8901_eint_hw = {
> > > > +     .port_mask = 0xf,
> > > > +     .ports     = 7,
> > > > +     .ap_num    = 209,
> > > > +     .db_cnt    = 32,
> > > > +     .db_time   = debounce_time_mt8901,
> > > > +};
> > > > +
> > > > +static const struct mtk_pin_soc mt8901_data = {
> > > > +     .reg_cal = mt8901_reg_cals,
> > > > +     .pins = mtk_pins_mt8901,
> > > > +     .npins = ARRAY_SIZE(mtk_pins_mt8901),
> > > > +     .ngrps = ARRAY_SIZE(mtk_pins_mt8901),
> > > > +     .eint_hw = &mt8901_eint_hw,
> > > > +     .eint_pin = eint_pins_mt8901,
> > > > +     .nfuncs = 8,
> > > > +     .gpio_m = 0,
> > > > +     .base_names = mt8901_pinctrl_register_base_name,
> > > > +     .nbase_names =
> > > > ARRAY_SIZE(mt8901_pinctrl_register_base_name),
> > > > +     .pull_type = mt8901_pull_type,
> > > > +     .pin_rsel = mt8901_pin_rsel_val_range,
> > > > +     .npin_rsel = ARRAY_SIZE(mt8901_pin_rsel_val_range),
> > > > /*numsel*/
> > > > +     .bias_set_combo = mtk_pinconf_bias_set_combo,
> > > > +     .bias_get_combo = mtk_pinconf_bias_get_combo,
> > > > +     .drive_set = mtk_pinconf_drive_set_rev1,
> > > > +     .drive_get = mtk_pinconf_drive_get_rev1,
> > > > +     .adv_drive_set = mtk_pinconf_adv_drive_set_raw,
> > > > +     .adv_drive_get = mtk_pinconf_adv_drive_get_raw,
> > > > +};
> > > > +
> > > > +static const struct acpi_device_id mt8901_pinctrl_acpi_match[]
> > > > =
> > > > {
> > > > +     {"NVDA9221", (kernel_ulong_t)&mt8901_data },
> > > > +     { }
> > > > +};
> > > > +MODULE_DEVICE_TABLE(acpi, mt8901_pinctrl_acpi_match);
> > > > +
> > > > +static struct platform_driver mt8901_pinctrl_driver = {
> > > > +     .driver = {
> > > > +             .name = "mt8901-pinctrl",
> > > > +             .acpi_match_table =
> > > > ACPI_PTR(mt8901_pinctrl_acpi_match),
> > > 
> > > Please also add support for devicetree - I have a hunch (and I'm
> > > sure
> > > that I am
> > > not the only one) that ACPI may give some issues at the end of
> > > the
> > > day, on ARM64.
> > > 
> > > Of course, I'd hope that ACPI is all good on this platform, but
> > > still.... :-)
> > > 
> > > static const struct of_device_id mt8901_pinctrl_of_match[] = {
> > >         { .compatible = "mediatek,mt8901-pinctrl", .data =
> > > &mt8901_data },
> > >         { /* sentinel */ }
> > > };
> > > 
> > >         .of_match_table = mt8901_pinctrl_of_match,
> > > 
> > > > +             .pm = pm_sleep_ptr(&mtk_paris_pinctrl_pm_ops)
> > > > +     },
> > > > +     .probe = mtk_paris_pinctrl_probe,
> > > > +};
> > > 
> > 
> > Hi Deep,
> > 
> > Could you please check and feedback to Angelo?
> > 
> > Regards,
> > Fred-WY Chen
> > 
> > > Cheers,
> > > Angelo
> > > 
> > > > +
> > > > +static int __init mt8901_pinctrl_init(void)
> > > > +{
> > > > +     return platform_driver_register(&mt8901_pinctrl_driver);
> > > > +}
> > > > +
> > > > +arch_initcall(mt8901_pinctrl_init);
> > > > +
> > > > +MODULE_LICENSE("GPL");
> > > > +MODULE_DESCRIPTION("MediaTek MT8901 Pinctrl Driver");
> > 
>