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Message-ID: <20220822165829.1e4fbc5f@md1za8fc.ad001.siemens.net>
Date: Mon, 22 Aug 2022 16:58:29 +0200
From: Henning Schild <henning.schild@...mens.com>
To: Linus Walleij <linus.walleij@...aro.org>,
Bartosz Golaszewski <brgl@...ev.pl>,
Pavel Machek <pavel@....cz>,
Hans de Goede <hdegoede@...hat.com>,
Mark Gross <markgross@...nel.org>,
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
Lee Jones <lee@...nel.org>, <linux-gpio@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, <linux-leds@...r.kernel.org>,
<platform-driver-x86@...r.kernel.org>
Cc: Sheng-Yuan Huang <syhuang3@...oton.com>,
Tasanakorn Phaipool <tasanakorn@...il.com>,
<simon.guinot@...uanux.org>
Subject: Re: [PATCH v3 1/4] gpio-f7188x: Add GPIO support for Nuvoton
NCT6116
Am Thu, 11 Aug 2022 17:39:05 +0200
schrieb Henning Schild <henning.schild@...mens.com>:
> Add GPIO support for Nuvoton NCT6116 chip. Nuvoton SuperIO chips are
> very similar to the ones from Fintek. In other subsystems they also
> share drivers and are called a family of drivers.
>
> For the GPIO subsystem the only difference is that the direction bit
> is reversed and that there is only one data bit per pin. On the
> SuperIO level the logical device is another one.
>
> Signed-off-by: Henning Schild <henning.schild@...mens.com>
> ---
> drivers/gpio/gpio-f7188x.c | 71
> +++++++++++++++++++++++++++----------- 1 file changed, 51
> insertions(+), 20 deletions(-)
>
> diff --git a/drivers/gpio/gpio-f7188x.c b/drivers/gpio/gpio-f7188x.c
> index 18a3147f5a42..7b05ecc611e9 100644
> --- a/drivers/gpio/gpio-f7188x.c
> +++ b/drivers/gpio/gpio-f7188x.c
> @@ -1,6 +1,7 @@
> // SPDX-License-Identifier: GPL-2.0-or-later
> /*
> * GPIO driver for Fintek Super-I/O F71869, F71869A, F71882, F71889
> and F81866
> + * and Nuvoton Super-I/O NCT6116D
That Kconfig item could also use an update, will include in next
version.
Henning
> *
> * Copyright (C) 2010-2013 LaCie
> *
> @@ -22,13 +23,12 @@
> #define SIO_LDSEL 0x07 /* Logical device
> select */ #define SIO_DEVID 0x20 /* Device ID
> (2 bytes) */ #define SIO_DEVREV 0x22 /* Device
> revision */ -#define SIO_MANID 0x23 /* Fintek
> ID (2 bytes) */
> -#define SIO_LD_GPIO 0x06 /* GPIO logical
> device */ #define SIO_UNLOCK_KEY 0x87 /* Key to
> enable Super-I/O */ #define SIO_LOCK_KEY 0xAA
> /* Key to disable Super-I/O */
> -#define SIO_FINTEK_ID 0x1934 /* Manufacturer
> ID */ +#define SIO_LD_GPIO_FINTEK 0x06 /* GPIO logical
> device */ +#define SIO_LD_GPIO_NUVOTON 0x07 /* GPIO
> logical device */ #define SIO_F71869_ID 0x0814
> /* F71869 chipset ID */ #define SIO_F71869A_ID
> 0x1007 /* F71869A chipset ID */ #define SIO_F71882_ID
> 0x0541 /* F71882 chipset ID */ @@ -37,7 +37,7 @@
> #define SIO_F81866_ID 0x1010 /* F81866 chipset
> ID */ #define SIO_F81804_ID 0x1502 /* F81804 chipset
> ID, same for f81966 */ #define SIO_F81865_ID
> 0x0704 /* F81865 chipset ID */ -
> +#define SIO_NCT6116D_ID 0xD283 /* NCT6116D chipset
> ID */
> enum chips {
> f71869,
> @@ -48,6 +48,7 @@ enum chips {
> f81866,
> f81804,
> f81865,
> + nct6116d,
> };
>
> static const char * const f7188x_names[] = {
> @@ -59,10 +60,12 @@ static const char * const f7188x_names[] = {
> "f81866",
> "f81804",
> "f81865",
> + "nct6116d",
> };
>
> struct f7188x_sio {
> int addr;
> + int device;
> enum chips type;
> };
>
> @@ -170,6 +173,9 @@ static int f7188x_gpio_set_config(struct
> gpio_chip *chip, unsigned offset, /* Output mode register (0:open
> drain 1:push-pull). */ #define gpio_out_mode(base) (base + 3)
>
> +#define gpio_dir_invert(type) ((type) == nct6116d)
> +#define gpio_data_single(type) ((type) == nct6116d)
> +
> static struct f7188x_gpio_bank f71869_gpio_bank[] = {
> F7188X_GPIO_BANK(0, 6, 0xF0),
> F7188X_GPIO_BANK(10, 8, 0xE0),
> @@ -254,6 +260,17 @@ static struct f7188x_gpio_bank
> f81865_gpio_bank[] = { F7188X_GPIO_BANK(60, 5, 0x90),
> };
>
> +static struct f7188x_gpio_bank nct6116d_gpio_bank[] = {
> + F7188X_GPIO_BANK(0, 8, 0xE0),
> + F7188X_GPIO_BANK(10, 8, 0xE4),
> + F7188X_GPIO_BANK(20, 8, 0xE8),
> + F7188X_GPIO_BANK(30, 8, 0xEC),
> + F7188X_GPIO_BANK(40, 8, 0xF0),
> + F7188X_GPIO_BANK(50, 8, 0xF4),
> + F7188X_GPIO_BANK(60, 8, 0xF8),
> + F7188X_GPIO_BANK(70, 1, 0xFC),
> +};
> +
> static int f7188x_gpio_get_direction(struct gpio_chip *chip,
> unsigned offset) {
> int err;
> @@ -264,13 +281,16 @@ static int f7188x_gpio_get_direction(struct
> gpio_chip *chip, unsigned offset) err = superio_enter(sio->addr);
> if (err)
> return err;
> - superio_select(sio->addr, SIO_LD_GPIO);
> + superio_select(sio->addr, sio->device);
>
> dir = superio_inb(sio->addr, gpio_dir(bank->regbase));
>
> superio_exit(sio->addr);
>
> - if (dir & 1 << offset)
> + if (gpio_dir_invert(sio->type))
> + dir = ~dir;
> +
> + if (dir & BIT(offset))
> return GPIO_LINE_DIRECTION_OUT;
>
> return GPIO_LINE_DIRECTION_IN;
> @@ -286,10 +306,14 @@ static int f7188x_gpio_direction_in(struct
> gpio_chip *chip, unsigned offset) err = superio_enter(sio->addr);
> if (err)
> return err;
> - superio_select(sio->addr, SIO_LD_GPIO);
> + superio_select(sio->addr, sio->device);
>
> dir = superio_inb(sio->addr, gpio_dir(bank->regbase));
> - dir &= ~BIT(offset);
> +
> + if (gpio_dir_invert(sio->type))
> + dir |= BIT(offset);
> + else
> + dir &= ~BIT(offset);
> superio_outb(sio->addr, gpio_dir(bank->regbase), dir);
>
> superio_exit(sio->addr);
> @@ -307,11 +331,11 @@ static int f7188x_gpio_get(struct gpio_chip
> *chip, unsigned offset) err = superio_enter(sio->addr);
> if (err)
> return err;
> - superio_select(sio->addr, SIO_LD_GPIO);
> + superio_select(sio->addr, sio->device);
>
> dir = superio_inb(sio->addr, gpio_dir(bank->regbase));
> dir = !!(dir & BIT(offset));
> - if (dir)
> + if (gpio_data_single(sio->type) || dir)
> data = superio_inb(sio->addr,
> gpio_data_out(bank->regbase)); else
> data = superio_inb(sio->addr,
> gpio_data_in(bank->regbase)); @@ -332,7 +356,7 @@ static int
> f7188x_gpio_direction_out(struct gpio_chip *chip, err =
> superio_enter(sio->addr); if (err)
> return err;
> - superio_select(sio->addr, SIO_LD_GPIO);
> + superio_select(sio->addr, sio->device);
>
> data_out = superio_inb(sio->addr,
> gpio_data_out(bank->regbase)); if (value)
> @@ -342,7 +366,10 @@ static int f7188x_gpio_direction_out(struct
> gpio_chip *chip, superio_outb(sio->addr,
> gpio_data_out(bank->regbase), data_out);
> dir = superio_inb(sio->addr, gpio_dir(bank->regbase));
> - dir |= BIT(offset);
> + if (gpio_dir_invert(sio->type))
> + dir &= ~BIT(offset);
> + else
> + dir |= BIT(offset);
> superio_outb(sio->addr, gpio_dir(bank->regbase), dir);
>
> superio_exit(sio->addr);
> @@ -360,7 +387,7 @@ static void f7188x_gpio_set(struct gpio_chip
> *chip, unsigned offset, int value) err = superio_enter(sio->addr);
> if (err)
> return;
> - superio_select(sio->addr, SIO_LD_GPIO);
> + superio_select(sio->addr, sio->device);
>
> data_out = superio_inb(sio->addr,
> gpio_data_out(bank->regbase)); if (value)
> @@ -388,7 +415,7 @@ static int f7188x_gpio_set_config(struct
> gpio_chip *chip, unsigned offset, err = superio_enter(sio->addr);
> if (err)
> return err;
> - superio_select(sio->addr, SIO_LD_GPIO);
> + superio_select(sio->addr, sio->device);
>
> data = superio_inb(sio->addr, gpio_out_mode(bank->regbase));
> if (param == PIN_CONFIG_DRIVE_OPEN_DRAIN)
> @@ -449,6 +476,10 @@ static int f7188x_gpio_probe(struct
> platform_device *pdev) data->nr_bank = ARRAY_SIZE(f81865_gpio_bank);
> data->bank = f81865_gpio_bank;
> break;
> + case nct6116d:
> + data->nr_bank = ARRAY_SIZE(nct6116d_gpio_bank);
> + data->bank = nct6116d_gpio_bank;
> + break;
> default:
> return -ENODEV;
> }
> @@ -485,12 +516,8 @@ static int __init f7188x_find(int addr, struct
> f7188x_sio *sio) return err;
>
> err = -ENODEV;
> - devid = superio_inw(addr, SIO_MANID);
> - if (devid != SIO_FINTEK_ID) {
> - pr_debug(DRVNAME ": Not a Fintek device at
> 0x%08x\n", addr);
> - goto err;
> - }
>
> + sio->device = SIO_LD_GPIO_FINTEK;
> devid = superio_inw(addr, SIO_DEVID);
> switch (devid) {
> case SIO_F71869_ID:
> @@ -517,8 +544,12 @@ static int __init f7188x_find(int addr, struct
> f7188x_sio *sio) case SIO_F81865_ID:
> sio->type = f81865;
> break;
> + case SIO_NCT6116D_ID:
> + sio->device = SIO_LD_GPIO_NUVOTON;
> + sio->type = nct6116d;
> + break;
> default:
> - pr_info(DRVNAME ": Unsupported Fintek device
> 0x%04x\n", devid);
> + pr_info(DRVNAME ": Unsupported device 0x%04x\n",
> devid); goto err;
> }
> sio->addr = addr;
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