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Message-ID: <df11bbf1-09d1-40fc-be56-6a98d90abcb6@collabora.com>
Date: Tue, 25 Nov 2025 10:56:22 +0100
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
To: Lei Xue <lei.xue@...iatek.com>, Sean Wang <sean.wang@...nel.org>,
Linus Walleij <linus.walleij@...aro.org>,
Matthias Brugger <matthias.bgg@...il.com>
Cc: linux-kernel@...r.kernel.org, linux-mediatek@...ts.infradead.org,
linux-gpio@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
yong.mao@...iatek.com, qingliang.li@...iatek.com, Fred-WY.Chen@...iatek.com,
ot_cathy.xu@...iatek.com, ot_shunxi.zhang@...iatek.com,
ot_yaoy.wang@...iatek.com, ot_ye.wang@...iatek.com
Subject: Re: [PATCH 3/3] pinctrl: mediatek: mt8901: Add pinctrl driver for
MT8901
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@...iatek.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,
> +};
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");
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