korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-12-12 21:44:06 +08:00
Code Issues Packages Projects Releases Wiki Activity

intel-gpio for v6.4-2

Browse Source 
* Fixed suspend issue on Clevo NL5xNU
 * Split a new Intel Tangier (library) driver for current and new platforms
 * Introduced a new driver for Intel Elkhart Lake PSE GPIO (see also above)
 * Contained a few fixes for the previous of_gpio.h cleanup
 * Miscellaneous cleanups here and there
 
 The following is an automated git shortlog grouped by driver:
 
 elkhartlake:
  -  Introduce Intel Elkhart Lake PSE GPIO
 
 gpiolib:
  -  acpi: Add a ignore wakeup quirk for Clevo NL5xNU
  -  acpi: Move ACPI device NULL check to acpi_get_driver_gpio_data()
  -  acpi: use the fwnode in acpi_gpiochip_find()
 
 ich:
  -  Use devm_gpiochip_add_data() to simplify remove path
 
 merrifield:
  -  Utilise temporary variable for struct device
  -  Use dev_err_probe()
  -  Adapt to Intel Tangier GPIO driver
 
 mips:
  -  ar7: include linux/gpio/driver.h
 
 mm-lantiq:
  -  Fix typo in the newly added header filename
 
 powerpc/40x:
  -  Add missing select OF_GPIO_MM_GPIOCHIP
 
 sh:
  -  mach-x3proto: Add missing #include <linux/gpio/driver.h>
 
 tangier:
  -  Introduce Intel Tangier GPIO driver
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCgAdFiEEqaflIX74DDDzMJJtb7wzTHR8rCgFAmQtW18ACgkQb7wzTHR8
 rCjnHQ/8DyjXe7lD7T+g2zmqZdv9o5h2EzlUNpJQdX2471f5oR0xti9+P6EafBln
 UxOIweE/RiFPCFlDqkc59mLKo6HhaMtGmiHKVn0V4hkizol1jrjU4lh9T8wVl6+G
 atVAyDLOp2az6uHOICCBABSwbReOdliTPdW0+cKZYLpmHuss2AHaswUn20fu9eQW
 2pBQanKEuHVwaA4ynpduFhQg3Wkvjj86oe3DN4FI0Rnvk9IjoMQdQQsGK0psl8FL
 C+NS4RGCwaRw2kpMI+qAjc1XQ6U9+403foUK6iPcYcEcoSLxImvtIQLN7DKzj6Nf
 yfzjhfYatPiPj2Jlr4LYVt3ZF4K5yEkAX84OTbUmxWod5elrm4Qp1Mf8M8fsfdSC
 R1fUUcsf8RhymfLPZ2sDKWumgo1iNZmCFlRlgnct78BpHIOj1H8NH942sDD9Sirf
 gzz3cyDWAVHYRwa+NLVacivICIvczz/bk82tn3098UeREHZfYXZwpUuloQXp3912
 QC9MarrTs56wq7x0klQMmnS8f7J0HFO1bx7whGvNQ72ArH8nrgdE3iCnZftdolpe
 5o/jqdMeJCb23pYBW+C02Eetajlsmkvg+lrzM68/TMhgzQ7YS1APUnpPykzOzeqo
 6c2Jz7I5kpDxXo7cIyss1tsSYruFUk54qpkmBVaSB/hWIN4LSKM=
 =yI78
 -----END PGP SIGNATURE-----

Merge tag 'intel-gpio-v6.4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/andy/linux-gpio-intel into gpio/for-next

intel-gpio for v6.4-2

* Fixed suspend issue on Clevo NL5xNU
* Split a new Intel Tangier (library) driver for current and new platforms
* Introduced a new driver for Intel Elkhart Lake PSE GPIO (see also above)
* Contained a few fixes for the previous of_gpio.h cleanup
* Miscellaneous cleanups here and there

The following is an automated git shortlog grouped by driver:

elkhartlake:
 -  Introduce Intel Elkhart Lake PSE GPIO

gpiolib:
 -  acpi: Add a ignore wakeup quirk for Clevo NL5xNU
 -  acpi: Move ACPI device NULL check to acpi_get_driver_gpio_data()
 -  acpi: use the fwnode in acpi_gpiochip_find()

ich:
 -  Use devm_gpiochip_add_data() to simplify remove path

merrifield:
 -  Utilise temporary variable for struct device
 -  Use dev_err_probe()
 -  Adapt to Intel Tangier GPIO driver

mips:
 -  ar7: include linux/gpio/driver.h

mm-lantiq:
 -  Fix typo in the newly added header filename

powerpc/40x:
 -  Add missing select OF_GPIO_MM_GPIOCHIP

sh:
 -  mach-x3proto: Add missing #include <linux/gpio/driver.h>

tangier:
 -  Introduce Intel Tangier GPIO driver
This commit is contained in:
Bartosz Golaszewski 2023-04-06 10:39:45 +02:00
commit f09673770e
13 changed files with 825 additions and 442 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
MAINTAINERS
View File

@ -10281,12 +10281,14 @@ M: Andy Shevchenko <andy@kernel.org>
L: linux-gpio@vger.kernel.org
S: Supported
T: git git://git.kernel.org/pub/scm/linux/kernel/git/andy/linux-gpio-intel.git
F: drivers/gpio/gpio-elkhartlake.c
F: drivers/gpio/gpio-ich.c
F: drivers/gpio/gpio-merrifield.c
F: drivers/gpio/gpio-ml-ioh.c
F: drivers/gpio/gpio-pch.c
F: drivers/gpio/gpio-sch.c
F: drivers/gpio/gpio-sodaville.c
F: drivers/gpio/gpio-tangier.c
INTEL GVT-g DRIVERS (Intel GPU Virtualization)
M: Zhenyu Wang <zhenyuw@linux.intel.com>

2
arch/mips/ar7/gpio.c
View File

@ -7,7 +7,7 @@
#include <linux/init.h>
#include <linux/export.h>
#include <linux/gpio.h>
#include <linux/gpio/driver.h>
#include <asm/mach-ar7/ar7.h>

1
arch/powerpc/platforms/40x/Kconfig
View File

@ -65,6 +65,7 @@ config PPC4xx_GPIO
bool "PPC4xx GPIO support"
depends on 40x
select GPIOLIB
select OF_GPIO_MM_GPIOCHIP
help
Enable gpiolib support for ppc40x based boards

2
arch/sh/boards/mach-x3proto/setup.c
View File

@ -16,7 +16,7 @@
#include <linux/input.h>
#include <linux/usb/r8a66597.h>
#include <linux/usb/m66592.h>
#include <linux/gpio.h>
#include <linux/gpio/driver.h>
#include <linux/gpio_keys.h>
#include <mach/ilsel.h>
#include <mach/hardware.h>

24
drivers/gpio/Kconfig
View File

@ -623,6 +623,17 @@ config GPIO_SYSCON
help
Say yes here to support GPIO functionality though SYSCON driver.
config GPIO_TANGIER
tristate
select GPIOLIB_IRQCHIP
help
GPIO support for Intel Tangier and compatible platforms.
Currently supported:
- Elkhart Lake
- Merrifield
If built as a module its name will be gpio-tangier.
config GPIO_TB10X
bool
select GPIO_GENERIC
@ -1252,6 +1263,17 @@ config HTC_EGPIO
several HTC phones. It provides basic support for input
pins, output pins, and IRQs.
config GPIO_ELKHARTLAKE
tristate "Intel Elkhart Lake PSE GPIO support"
depends on X86 || COMPILE_TEST
select GPIO_TANGIER
help
Select this option to enable GPIO support for Intel Elkhart Lake
PSE GPIO IP.
To compile this driver as a module, choose M here: the module will
be called gpio-elkhartlake.
config GPIO_JANZ_TTL
tristate "Janz VMOD-TTL Digital IO Module"
depends on MFD_JANZ_CMODIO
@ -1530,7 +1552,7 @@ config GPIO_BT8XX
config GPIO_MERRIFIELD
tristate "Intel Merrifield GPIO support"
depends on X86_INTEL_MID
select GPIOLIB_IRQCHIP
select GPIO_TANGIER
help
Say Y here to support Intel Merrifield GPIO.

2
drivers/gpio/Makefile
View File

@ -54,6 +54,7 @@ obj-$(CONFIG_GPIO_DAVINCI) += gpio-davinci.o
obj-$(CONFIG_GPIO_DLN2) += gpio-dln2.o
obj-$(CONFIG_GPIO_DWAPB) += gpio-dwapb.o
obj-$(CONFIG_GPIO_EIC_SPRD) += gpio-eic-sprd.o
obj-$(CONFIG_GPIO_ELKHARTLAKE) += gpio-elkhartlake.o
obj-$(CONFIG_GPIO_EM) += gpio-em.o
obj-$(CONFIG_GPIO_EN7523) += gpio-en7523.o
obj-$(CONFIG_GPIO_EP93XX) += gpio-ep93xx.o
@ -147,6 +148,7 @@ obj-$(CONFIG_GPIO_SPRD) += gpio-sprd.o
obj-$(CONFIG_GPIO_STMPE) += gpio-stmpe.o
obj-$(CONFIG_GPIO_STP_XWAY) += gpio-stp-xway.o
obj-$(CONFIG_GPIO_SYSCON) += gpio-syscon.o
obj-$(CONFIG_GPIO_TANGIER) += gpio-tangier.o
obj-$(CONFIG_GPIO_TB10X) += gpio-tb10x.o
obj-$(CONFIG_GPIO_TC3589X) += gpio-tc3589x.o
obj-$(CONFIG_GPIO_TEGRA186) += gpio-tegra186.o

90
drivers/gpio/gpio-elkhartlake.c Normal file
View File

@ -0,0 +1,90 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* Intel Elkhart Lake PSE GPIO driver
*
* Copyright (c) 2023 Intel Corporation.
*
* Authors: Pandith N <pandith.n@intel.com>
* Raag Jadav <raag.jadav@intel.com>
*/
#include <linux/device.h>
#include <linux/err.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
#include "gpio-tangier.h"
/* Each Intel EHL PSE GPIO Controller has 30 GPIO pins */
#define EHL_PSE_NGPIO 30
static int ehl_gpio_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct tng_gpio *priv;
int irq, ret;
irq = platform_get_irq(pdev, 0);
if (irq < 0)
return irq;
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->reg_base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(priv->reg_base))
return PTR_ERR(priv->reg_base);
priv->dev = dev;
priv->irq = irq;
priv->info.base = -1;
priv->info.ngpio = EHL_PSE_NGPIO;
priv->wake_regs.gwmr = GWMR_EHL;
priv->wake_regs.gwsr = GWSR_EHL;
priv->wake_regs.gsir = GSIR_EHL;
ret = devm_tng_gpio_probe(dev, priv);
if (ret)
return dev_err_probe(dev, ret, "tng_gpio_probe error\n");
platform_set_drvdata(pdev, priv);
return 0;
}
static int ehl_gpio_suspend(struct device *dev)
{
return tng_gpio_suspend(dev);
}
static int ehl_gpio_resume(struct device *dev)
{
return tng_gpio_resume(dev);
}
static DEFINE_SIMPLE_DEV_PM_OPS(ehl_gpio_pm_ops, ehl_gpio_suspend, ehl_gpio_resume);
static const struct platform_device_id ehl_gpio_ids[] = {
{ "gpio-elkhartlake" },
{ }
};
MODULE_DEVICE_TABLE(platform, ehl_gpio_ids);
static struct platform_driver ehl_gpio_driver = {
.driver = {
.name = "gpio-elkhartlake",
.pm = pm_sleep_ptr(&ehl_gpio_pm_ops),
},
.probe = ehl_gpio_probe,
.id_table = ehl_gpio_ids,
};
module_platform_driver(ehl_gpio_driver);
MODULE_AUTHOR("Pandith N <pandith.n@intel.com>");
MODULE_AUTHOR("Raag Jadav <raag.jadav@intel.com>");
MODULE_DESCRIPTION("Intel Elkhart Lake PSE GPIO driver");
MODULE_LICENSE("GPL");
MODULE_IMPORT_NS(GPIO_TANGIER);

10
drivers/gpio/gpio-ich.c
View File

@ -457,7 +457,7 @@ static int ichx_gpio_probe(struct platform_device *pdev)
init:
ichx_gpiolib_setup(&ichx_priv.chip);
err = gpiochip_add_data(&ichx_priv.chip, NULL);
err = devm_gpiochip_add_data(dev, &ichx_priv.chip, NULL);
if (err) {
dev_err(dev, "Failed to register GPIOs\n");
return err;
@ -469,19 +469,11 @@ init:
return 0;
}
static int ichx_gpio_remove(struct platform_device *pdev)
{
gpiochip_remove(&ichx_priv.chip);
return 0;
}
static struct platform_driver ichx_gpio_driver = {
.driver = {
.name = DRV_NAME,
},
.probe = ichx_gpio_probe,
.remove = ichx_gpio_remove,
};
module_platform_driver(ichx_gpio_driver);

453
drivers/gpio/gpio-merrifield.c
View File

@ -2,60 +2,25 @@
/*
* Intel Merrifield SoC GPIO driver
*
* Copyright (c) 2016 Intel Corporation.
* Copyright (c) 2016, 2023 Intel Corporation.
* Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
*/
#include <linux/acpi.h>
#include <linux/bitops.h>
#include <linux/gpio/driver.h>
#include <linux/interrupt.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/pinctrl/consumer.h>
#include <linux/string_helpers.h>
#include <linux/types.h>
#define GCCR 0x000 /* controller configuration */
#define GPLR 0x004 /* pin level r/o */
#define GPDR 0x01c /* pin direction */
#define GPSR 0x034 /* pin set w/o */
#define GPCR 0x04c /* pin clear w/o */
#define GRER 0x064 /* rising edge detect */
#define GFER 0x07c /* falling edge detect */
#define GFBR 0x094 /* glitch filter bypass */
#define GIMR 0x0ac /* interrupt mask */
#define GISR 0x0c4 /* interrupt source */
#define GITR 0x300 /* input type */
#define GLPR 0x318 /* level input polarity */
#define GWMR 0x400 /* wake mask */
#define GWSR 0x418 /* wake source */
#define GSIR 0xc00 /* secure input */
#include "gpio-tangier.h"
/* Intel Merrifield has 192 GPIO pins */
#define MRFLD_NGPIO 192
struct mrfld_gpio_pinrange {
unsigned int gpio_base;
unsigned int pin_base;
unsigned int npins;
};
#define GPIO_PINRANGE(gstart, gend, pstart) \
{ \
.gpio_base = (gstart), \
.pin_base = (pstart), \
.npins = (gend) - (gstart) + 1, \
}
struct mrfld_gpio {
struct gpio_chip chip;
void __iomem *reg_base;
raw_spinlock_t lock;
struct device *dev;
};
static const struct mrfld_gpio_pinrange mrfld_gpio_ranges[] = {
static const struct tng_gpio_pinrange mrfld_gpio_ranges[] = {
GPIO_PINRANGE(0, 11, 146),
GPIO_PINRANGE(12, 13, 144),
GPIO_PINRANGE(14, 15, 35),
@ -84,323 +49,15 @@ static const struct mrfld_gpio_pinrange mrfld_gpio_ranges[] = {
GPIO_PINRANGE(190, 191, 178),
};
static void __iomem *gpio_reg(struct gpio_chip *chip, unsigned int offset,
unsigned int reg_type_offset)
{
struct mrfld_gpio *priv = gpiochip_get_data(chip);
u8 reg = offset / 32;
return priv->reg_base + reg_type_offset + reg * 4;
}
static int mrfld_gpio_get(struct gpio_chip *chip, unsigned int offset)
{
void __iomem *gplr = gpio_reg(chip, offset, GPLR);
return !!(readl(gplr) & BIT(offset % 32));
}
static void mrfld_gpio_set(struct gpio_chip *chip, unsigned int offset,
int value)
{
struct mrfld_gpio *priv = gpiochip_get_data(chip);
void __iomem *gpsr, *gpcr;
unsigned long flags;
raw_spin_lock_irqsave(&priv->lock, flags);
if (value) {
gpsr = gpio_reg(chip, offset, GPSR);
writel(BIT(offset % 32), gpsr);
} else {
gpcr = gpio_reg(chip, offset, GPCR);
writel(BIT(offset % 32), gpcr);
}
raw_spin_unlock_irqrestore(&priv->lock, flags);
}
static int mrfld_gpio_direction_input(struct gpio_chip *chip,
unsigned int offset)
{
struct mrfld_gpio *priv = gpiochip_get_data(chip);
void __iomem *gpdr = gpio_reg(chip, offset, GPDR);
unsigned long flags;
u32 value;
raw_spin_lock_irqsave(&priv->lock, flags);
value = readl(gpdr);
value &= ~BIT(offset % 32);
writel(value, gpdr);
raw_spin_unlock_irqrestore(&priv->lock, flags);
return 0;
}
static int mrfld_gpio_direction_output(struct gpio_chip *chip,
unsigned int offset, int value)
{
struct mrfld_gpio *priv = gpiochip_get_data(chip);
void __iomem *gpdr = gpio_reg(chip, offset, GPDR);
unsigned long flags;
mrfld_gpio_set(chip, offset, value);
raw_spin_lock_irqsave(&priv->lock, flags);
value = readl(gpdr);
value |= BIT(offset % 32);
writel(value, gpdr);
raw_spin_unlock_irqrestore(&priv->lock, flags);
return 0;
}
static int mrfld_gpio_get_direction(struct gpio_chip *chip, unsigned int offset)
{
void __iomem *gpdr = gpio_reg(chip, offset, GPDR);
if (readl(gpdr) & BIT(offset % 32))
return GPIO_LINE_DIRECTION_OUT;
return GPIO_LINE_DIRECTION_IN;
}
static int mrfld_gpio_set_debounce(struct gpio_chip *chip, unsigned int offset,
unsigned int debounce)
{
struct mrfld_gpio *priv = gpiochip_get_data(chip);
void __iomem *gfbr = gpio_reg(chip, offset, GFBR);
unsigned long flags;
u32 value;
raw_spin_lock_irqsave(&priv->lock, flags);
if (debounce)
value = readl(gfbr) & ~BIT(offset % 32);
else
value = readl(gfbr) | BIT(offset % 32);
writel(value, gfbr);
raw_spin_unlock_irqrestore(&priv->lock, flags);
return 0;
}
static int mrfld_gpio_set_config(struct gpio_chip *chip, unsigned int offset,
unsigned long config)
{
u32 debounce;
if ((pinconf_to_config_param(config) == PIN_CONFIG_BIAS_DISABLE) ||
(pinconf_to_config_param(config) == PIN_CONFIG_BIAS_PULL_UP) ||
(pinconf_to_config_param(config) == PIN_CONFIG_BIAS_PULL_DOWN))
return gpiochip_generic_config(chip, offset, config);
if (pinconf_to_config_param(config) != PIN_CONFIG_INPUT_DEBOUNCE)
return -ENOTSUPP;
debounce = pinconf_to_config_argument(config);
return mrfld_gpio_set_debounce(chip, offset, debounce);
}
static void mrfld_irq_ack(struct irq_data *d)
{
struct mrfld_gpio *priv = irq_data_get_irq_chip_data(d);
u32 gpio = irqd_to_hwirq(d);
void __iomem *gisr = gpio_reg(&priv->chip, gpio, GISR);
unsigned long flags;
raw_spin_lock_irqsave(&priv->lock, flags);
writel(BIT(gpio % 32), gisr);
raw_spin_unlock_irqrestore(&priv->lock, flags);
}
static void mrfld_irq_unmask_mask(struct mrfld_gpio *priv, u32 gpio, bool unmask)
{
void __iomem *gimr = gpio_reg(&priv->chip, gpio, GIMR);
unsigned long flags;
u32 value;
raw_spin_lock_irqsave(&priv->lock, flags);
if (unmask)
value = readl(gimr) | BIT(gpio % 32);
else
value = readl(gimr) & ~BIT(gpio % 32);
writel(value, gimr);
raw_spin_unlock_irqrestore(&priv->lock, flags);
}
static void mrfld_irq_mask(struct irq_data *d)
{
struct mrfld_gpio *priv = irq_data_get_irq_chip_data(d);
u32 gpio = irqd_to_hwirq(d);
mrfld_irq_unmask_mask(priv, gpio, false);
gpiochip_disable_irq(&priv->chip, gpio);
}
static void mrfld_irq_unmask(struct irq_data *d)
{
struct mrfld_gpio *priv = irq_data_get_irq_chip_data(d);
u32 gpio = irqd_to_hwirq(d);
gpiochip_enable_irq(&priv->chip, gpio);
mrfld_irq_unmask_mask(priv, gpio, true);
}
static int mrfld_irq_set_type(struct irq_data *d, unsigned int type)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
struct mrfld_gpio *priv = gpiochip_get_data(gc);
u32 gpio = irqd_to_hwirq(d);
void __iomem *grer = gpio_reg(&priv->chip, gpio, GRER);
void __iomem *gfer = gpio_reg(&priv->chip, gpio, GFER);
void __iomem *gitr = gpio_reg(&priv->chip, gpio, GITR);
void __iomem *glpr = gpio_reg(&priv->chip, gpio, GLPR);
unsigned long flags;
u32 value;
raw_spin_lock_irqsave(&priv->lock, flags);
if (type & IRQ_TYPE_EDGE_RISING)
value = readl(grer) | BIT(gpio % 32);
else
value = readl(grer) & ~BIT(gpio % 32);
writel(value, grer);
if (type & IRQ_TYPE_EDGE_FALLING)
value = readl(gfer) | BIT(gpio % 32);
else
value = readl(gfer) & ~BIT(gpio % 32);
writel(value, gfer);
/*
* To prevent glitches from triggering an unintended level interrupt,
* configure GLPR register first and then configure GITR.
*/
if (type & IRQ_TYPE_LEVEL_LOW)
value = readl(glpr) | BIT(gpio % 32);
else
value = readl(glpr) & ~BIT(gpio % 32);
writel(value, glpr);
if (type & IRQ_TYPE_LEVEL_MASK) {
value = readl(gitr) | BIT(gpio % 32);
writel(value, gitr);
irq_set_handler_locked(d, handle_level_irq);
} else if (type & IRQ_TYPE_EDGE_BOTH) {
value = readl(gitr) & ~BIT(gpio % 32);
writel(value, gitr);
irq_set_handler_locked(d, handle_edge_irq);
}
raw_spin_unlock_irqrestore(&priv->lock, flags);
return 0;
}
static int mrfld_irq_set_wake(struct irq_data *d, unsigned int on)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
struct mrfld_gpio *priv = gpiochip_get_data(gc);
u32 gpio = irqd_to_hwirq(d);
void __iomem *gwmr = gpio_reg(&priv->chip, gpio, GWMR);
void __iomem *gwsr = gpio_reg(&priv->chip, gpio, GWSR);
unsigned long flags;
u32 value;
raw_spin_lock_irqsave(&priv->lock, flags);
/* Clear the existing wake status */
writel(BIT(gpio % 32), gwsr);
if (on)
value = readl(gwmr) | BIT(gpio % 32);
else
value = readl(gwmr) & ~BIT(gpio % 32);
writel(value, gwmr);
raw_spin_unlock_irqrestore(&priv->lock, flags);
dev_dbg(priv->dev, "%s wake for gpio %u\n", str_enable_disable(on), gpio);
return 0;
}
static const struct irq_chip mrfld_irqchip = {
.name = "gpio-merrifield",
.irq_ack = mrfld_irq_ack,
.irq_mask = mrfld_irq_mask,
.irq_unmask = mrfld_irq_unmask,
.irq_set_type = mrfld_irq_set_type,
.irq_set_wake = mrfld_irq_set_wake,
.flags = IRQCHIP_IMMUTABLE,
GPIOCHIP_IRQ_RESOURCE_HELPERS,
};
static void mrfld_irq_handler(struct irq_desc *desc)
{
struct gpio_chip *gc = irq_desc_get_handler_data(desc);
struct mrfld_gpio *priv = gpiochip_get_data(gc);
struct irq_chip *irqchip = irq_desc_get_chip(desc);
unsigned long base, gpio;
chained_irq_enter(irqchip, desc);
/* Check GPIO controller to check which pin triggered the interrupt */
for (base = 0; base < priv->chip.ngpio; base += 32) {
void __iomem *gisr = gpio_reg(&priv->chip, base, GISR);
void __iomem *gimr = gpio_reg(&priv->chip, base, GIMR);
unsigned long pending, enabled;
pending = readl(gisr);
enabled = readl(gimr);
/* Only interrupts that are enabled */
pending &= enabled;
for_each_set_bit(gpio, &pending, 32)
generic_handle_domain_irq(gc->irq.domain, base + gpio);
}
chained_irq_exit(irqchip, desc);
}
static int mrfld_irq_init_hw(struct gpio_chip *chip)
{
struct mrfld_gpio *priv = gpiochip_get_data(chip);
void __iomem *reg;
unsigned int base;
for (base = 0; base < priv->chip.ngpio; base += 32) {
/* Clear the rising-edge detect register */
reg = gpio_reg(&priv->chip, base, GRER);
writel(0, reg);
/* Clear the falling-edge detect register */
reg = gpio_reg(&priv->chip, base, GFER);
writel(0, reg);
}
return 0;
}
static const char *mrfld_gpio_get_pinctrl_dev_name(struct mrfld_gpio *priv)
static const char *mrfld_gpio_get_pinctrl_dev_name(struct tng_gpio *priv)
{
struct device *dev = priv->dev;
struct acpi_device *adev;
const char *name;
adev = acpi_dev_get_first_match_dev("INTC1002", NULL, -1);
if (adev) {
name = devm_kstrdup(priv->dev, acpi_dev_name(adev), GFP_KERNEL);
name = devm_kstrdup(dev, acpi_dev_name(adev), GFP_KERNEL);
acpi_dev_put(adev);
} else {
name = "pinctrl-merrifield";
@ -409,37 +66,10 @@ static const char *mrfld_gpio_get_pinctrl_dev_name(struct mrfld_gpio *priv)
return name;
}
static int mrfld_gpio_add_pin_ranges(struct gpio_chip *chip)
{
struct mrfld_gpio *priv = gpiochip_get_data(chip);
const struct mrfld_gpio_pinrange *range;
const char *pinctrl_dev_name;
unsigned int i;
int retval;
pinctrl_dev_name = mrfld_gpio_get_pinctrl_dev_name(priv);
if (!pinctrl_dev_name)
return -ENOMEM;
for (i = 0; i < ARRAY_SIZE(mrfld_gpio_ranges); i++) {
range = &mrfld_gpio_ranges[i];
retval = gpiochip_add_pin_range(&priv->chip, pinctrl_dev_name,
range->gpio_base,
range->pin_base,
range->npins);
if (retval) {
dev_err(priv->dev, "failed to add GPIO pin range\n");
return retval;
}
}
return 0;
}
static int mrfld_gpio_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
struct gpio_irq_chip *girq;
struct mrfld_gpio *priv;
struct device *dev = &pdev->dev;
struct tng_gpio *priv;
u32 gpio_base, irq_base;
void __iomem *base;
int retval;
@ -449,10 +79,8 @@ static int mrfld_gpio_probe(struct pci_dev *pdev, const struct pci_device_id *id
return retval;
retval = pcim_iomap_regions(pdev, BIT(1) | BIT(0), pci_name(pdev));
if (retval) {
dev_err(&pdev->dev, "I/O memory mapping error\n");
return retval;
}
if (retval)
return dev_err_probe(dev, retval, "I/O memory mapping error\n");
base = pcim_iomap_table(pdev)[1];
@ -462,53 +90,36 @@ static int mrfld_gpio_probe(struct pci_dev *pdev, const struct pci_device_id *id
/* Release the IO mapping, since we already get the info from BAR1 */
pcim_iounmap_regions(pdev, BIT(1));
priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->dev = &pdev->dev;
priv->dev = dev;
priv->reg_base = pcim_iomap_table(pdev)[0];
priv->chip.label = dev_name(&pdev->dev);
priv->chip.parent = &pdev->dev;
priv->chip.request = gpiochip_generic_request;
priv->chip.free = gpiochip_generic_free;
priv->chip.direction_input = mrfld_gpio_direction_input;
priv->chip.direction_output = mrfld_gpio_direction_output;
priv->chip.get = mrfld_gpio_get;
priv->chip.set = mrfld_gpio_set;
priv->chip.get_direction = mrfld_gpio_get_direction;
priv->chip.set_config = mrfld_gpio_set_config;
priv->chip.base = gpio_base;
priv->chip.ngpio = MRFLD_NGPIO;
priv->chip.can_sleep = false;
priv->chip.add_pin_ranges = mrfld_gpio_add_pin_ranges;
priv->pin_info.pin_ranges = mrfld_gpio_ranges;
priv->pin_info.nranges = ARRAY_SIZE(mrfld_gpio_ranges);
priv->pin_info.name = mrfld_gpio_get_pinctrl_dev_name(priv);
if (!priv->pin_info.name)
return -ENOMEM;
raw_spin_lock_init(&priv->lock);
priv->info.base = gpio_base;
priv->info.ngpio = MRFLD_NGPIO;
priv->info.first = irq_base;
retval = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_ALL_TYPES);
if (retval < 0)
return retval;
girq = &priv->chip.irq;
gpio_irq_chip_set_chip(girq, &mrfld_irqchip);
girq->init_hw = mrfld_irq_init_hw;
girq->parent_handler = mrfld_irq_handler;
girq->num_parents = 1;
girq->parents = devm_kcalloc(&pdev->dev, girq->num_parents,
sizeof(*girq->parents), GFP_KERNEL);
if (!girq->parents)
return -ENOMEM;
girq->parents[0] = pci_irq_vector(pdev, 0);
girq->first = irq_base;
girq->default_type = IRQ_TYPE_NONE;
girq->handler = handle_bad_irq;
priv->irq = pci_irq_vector(pdev, 0);
retval = devm_gpiochip_add_data(&pdev->dev, &priv->chip, priv);
if (retval) {
dev_err(&pdev->dev, "gpiochip_add error %d\n", retval);
return retval;
}
priv->wake_regs.gwmr = GWMR_MRFLD;
priv->wake_regs.gwsr = GWSR_MRFLD;
priv->wake_regs.gsir = GSIR_MRFLD;
retval = devm_tng_gpio_probe(dev, priv);
if (retval)
return dev_err_probe(dev, retval, "tng_gpio_probe error\n");
pci_set_drvdata(pdev, priv);
return 0;
@ -525,9 +136,9 @@ static struct pci_driver mrfld_gpio_driver = {
.id_table = mrfld_gpio_ids,
.probe = mrfld_gpio_probe,
};
module_pci_driver(mrfld_gpio_driver);
MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
MODULE_DESCRIPTION("Intel Merrifield SoC GPIO driver");
MODULE_LICENSE("GPL v2");
MODULE_IMPORT_NS(GPIO_TANGIER);

2
drivers/gpio/gpio-mm-lantiq.c
View File

@ -10,7 +10,7 @@
#include <linux/platform_device.h>
#include <linux/mutex.h>
#include <linux/gpio/driver.h>
#include <linux/gpio/legacy-of-mm-gpiochip.h.h>
#include <linux/gpio/legacy-of-mm-gpiochip.h>
#include <linux/of.h>
#include <linux/io.h>
#include <linux/slab.h>

536
drivers/gpio/gpio-tangier.c Normal file
View File

@ -0,0 +1,536 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* Intel Tangier GPIO driver
*
* Copyright (c) 2016, 2021, 2023 Intel Corporation.
*
* Authors: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
* Pandith N <pandith.n@intel.com>
* Raag Jadav <raag.jadav@intel.com>
*/
#include <linux/bitops.h>
#include <linux/device.h>
#include <linux/errno.h>
#include <linux/export.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/irq.h>
#include <linux/module.h>
#include <linux/pinctrl/pinconf-generic.h>
#include <linux/spinlock.h>
#include <linux/string_helpers.h>
#include <linux/types.h>
#include <linux/gpio/driver.h>
#include "gpio-tangier.h"
#define GCCR 0x000 /* Controller configuration */
#define GPLR 0x004 /* Pin level r/o */
#define GPDR 0x01c /* Pin direction */
#define GPSR 0x034 /* Pin set w/o */
#define GPCR 0x04c /* Pin clear w/o */
#define GRER 0x064 /* Rising edge detect */
#define GFER 0x07c /* Falling edge detect */
#define GFBR 0x094 /* Glitch filter bypass */
#define GIMR 0x0ac /* Interrupt mask */
#define GISR 0x0c4 /* Interrupt source */
#define GITR 0x300 /* Input type */
#define GLPR 0x318 /* Level input polarity */
/**
* struct tng_gpio_context - Context to be saved during suspend-resume
* @level: Pin level
* @gpdr: Pin direction
* @grer: Rising edge detect enable
* @gfer: Falling edge detect enable
* @gimr: Interrupt mask
* @gwmr: Wake mask
*/
struct tng_gpio_context {
u32 level;
u32 gpdr;
u32 grer;
u32 gfer;
u32 gimr;
u32 gwmr;
};
static void __iomem *gpio_reg(struct gpio_chip *chip, unsigned int offset,
unsigned int reg)
{
struct tng_gpio *priv = gpiochip_get_data(chip);
u8 reg_offset = offset / 32;
return priv->reg_base + reg + reg_offset * 4;
}
static void __iomem *gpio_reg_and_bit(struct gpio_chip *chip, unsigned int offset,
unsigned int reg, u8 *bit)
{
struct tng_gpio *priv = gpiochip_get_data(chip);
u8 reg_offset = offset / 32;
u8 shift = offset % 32;
*bit = shift;
return priv->reg_base + reg + reg_offset * 4;
}
static int tng_gpio_get(struct gpio_chip *chip, unsigned int offset)
{
void __iomem *gplr;
u8 shift;
gplr = gpio_reg_and_bit(chip, offset, GPLR, &shift);
return !!(readl(gplr) & BIT(shift));
}
static void tng_gpio_set(struct gpio_chip *chip, unsigned int offset, int value)
{
struct tng_gpio *priv = gpiochip_get_data(chip);
unsigned long flags;
void __iomem *reg;
u8 shift;
reg = gpio_reg_and_bit(chip, offset, value ? GPSR : GPCR, &shift);
raw_spin_lock_irqsave(&priv->lock, flags);
writel(BIT(shift), reg);
raw_spin_unlock_irqrestore(&priv->lock, flags);
}
static int tng_gpio_direction_input(struct gpio_chip *chip, unsigned int offset)
{
struct tng_gpio *priv = gpiochip_get_data(chip);
unsigned long flags;
void __iomem *gpdr;
u32 value;
u8 shift;
gpdr = gpio_reg_and_bit(chip, offset, GPDR, &shift);
raw_spin_lock_irqsave(&priv->lock, flags);
value = readl(gpdr);
value &= ~BIT(shift);
writel(value, gpdr);
raw_spin_unlock_irqrestore(&priv->lock, flags);
return 0;
}
static int tng_gpio_direction_output(struct gpio_chip *chip, unsigned int offset,
int value)
{
struct tng_gpio *priv = gpiochip_get_data(chip);
unsigned long flags;
void __iomem *gpdr;
u8 shift;
gpdr = gpio_reg_and_bit(chip, offset, GPDR, &shift);
tng_gpio_set(chip, offset, value);
raw_spin_lock_irqsave(&priv->lock, flags);
value = readl(gpdr);
value |= BIT(shift);
writel(value, gpdr);
raw_spin_unlock_irqrestore(&priv->lock, flags);
return 0;
}
static int tng_gpio_get_direction(struct gpio_chip *chip, unsigned int offset)
{
void __iomem *gpdr;
u8 shift;
gpdr = gpio_reg_and_bit(chip, offset, GPDR, &shift);
if (readl(gpdr) & BIT(shift))
return GPIO_LINE_DIRECTION_OUT;
return GPIO_LINE_DIRECTION_IN;
}
static int tng_gpio_set_debounce(struct gpio_chip *chip, unsigned int offset,
unsigned int debounce)
{
struct tng_gpio *priv = gpiochip_get_data(chip);
unsigned long flags;
void __iomem *gfbr;
u32 value;
u8 shift;
gfbr = gpio_reg_and_bit(chip, offset, GFBR, &shift);
raw_spin_lock_irqsave(&priv->lock, flags);
value = readl(gfbr);
if (debounce)
value &= ~BIT(shift);
else
value |= BIT(shift);
writel(value, gfbr);
raw_spin_unlock_irqrestore(&priv->lock, flags);
return 0;
}
static int tng_gpio_set_config(struct gpio_chip *chip, unsigned int offset,
unsigned long config)
{
u32 debounce;
switch (pinconf_to_config_param(config)) {
case PIN_CONFIG_BIAS_DISABLE:
case PIN_CONFIG_BIAS_PULL_UP:
case PIN_CONFIG_BIAS_PULL_DOWN:
return gpiochip_generic_config(chip, offset, config);
case PIN_CONFIG_INPUT_DEBOUNCE:
debounce = pinconf_to_config_argument(config);
return tng_gpio_set_debounce(chip, offset, debounce);
default:
return -ENOTSUPP;
}
}
static void tng_irq_ack(struct irq_data *d)
{
struct tng_gpio *priv = irq_data_get_irq_chip_data(d);
irq_hw_number_t gpio = irqd_to_hwirq(d);
unsigned long flags;
void __iomem *gisr;
u8 shift;
gisr = gpio_reg_and_bit(&priv->chip, gpio, GISR, &shift);
raw_spin_lock_irqsave(&priv->lock, flags);
writel(BIT(shift), gisr);
raw_spin_unlock_irqrestore(&priv->lock, flags);
}
static void tng_irq_unmask_mask(struct tng_gpio *priv, u32 gpio, bool unmask)
{
unsigned long flags;
void __iomem *gimr;
u32 value;
u8 shift;
gimr = gpio_reg_and_bit(&priv->chip, gpio, GIMR, &shift);
raw_spin_lock_irqsave(&priv->lock, flags);
value = readl(gimr);
if (unmask)
value |= BIT(shift);
else
value &= ~BIT(shift);
writel(value, gimr);
raw_spin_unlock_irqrestore(&priv->lock, flags);
}
static void tng_irq_mask(struct irq_data *d)
{
struct tng_gpio *priv = irq_data_get_irq_chip_data(d);
irq_hw_number_t gpio = irqd_to_hwirq(d);
tng_irq_unmask_mask(priv, gpio, false);
gpiochip_disable_irq(&priv->chip, gpio);
}
static void tng_irq_unmask(struct irq_data *d)
{
struct tng_gpio *priv = irq_data_get_irq_chip_data(d);
irq_hw_number_t gpio = irqd_to_hwirq(d);
gpiochip_enable_irq(&priv->chip, gpio);
tng_irq_unmask_mask(priv, gpio, true);
}
static int tng_irq_set_type(struct irq_data *d, unsigned int type)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
struct tng_gpio *priv = gpiochip_get_data(gc);
irq_hw_number_t gpio = irqd_to_hwirq(d);
void __iomem *grer = gpio_reg(&priv->chip, gpio, GRER);
void __iomem *gfer = gpio_reg(&priv->chip, gpio, GFER);
void __iomem *gitr = gpio_reg(&priv->chip, gpio, GITR);
void __iomem *glpr = gpio_reg(&priv->chip, gpio, GLPR);
u8 shift = gpio % 32;
unsigned long flags;
u32 value;
raw_spin_lock_irqsave(&priv->lock, flags);
value = readl(grer);
if (type & IRQ_TYPE_EDGE_RISING)
value |= BIT(shift);
else
value &= ~BIT(shift);
writel(value, grer);
value = readl(gfer);
if (type & IRQ_TYPE_EDGE_FALLING)
value |= BIT(shift);
else
value &= ~BIT(shift);
writel(value, gfer);
/*
* To prevent glitches from triggering an unintended level interrupt,
* configure GLPR register first and then configure GITR.
*/
value = readl(glpr);
if (type & IRQ_TYPE_LEVEL_LOW)
value |= BIT(shift);
else
value &= ~BIT(shift);
writel(value, glpr);
if (type & IRQ_TYPE_LEVEL_MASK) {
value = readl(gitr);
value |= BIT(shift);
writel(value, gitr);
irq_set_handler_locked(d, handle_level_irq);
} else if (type & IRQ_TYPE_EDGE_BOTH) {
value = readl(gitr);
value &= ~BIT(shift);
writel(value, gitr);
irq_set_handler_locked(d, handle_edge_irq);
}
raw_spin_unlock_irqrestore(&priv->lock, flags);
return 0;
}
static int tng_irq_set_wake(struct irq_data *d, unsigned int on)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
struct tng_gpio *priv = gpiochip_get_data(gc);
irq_hw_number_t gpio = irqd_to_hwirq(d);
void __iomem *gwmr = gpio_reg(&priv->chip, gpio, priv->wake_regs.gwmr);
void __iomem *gwsr = gpio_reg(&priv->chip, gpio, priv->wake_regs.gwsr);
u8 shift = gpio % 32;
unsigned long flags;
u32 value;
raw_spin_lock_irqsave(&priv->lock, flags);
/* Clear the existing wake status */
writel(BIT(shift), gwsr);
value = readl(gwmr);
if (on)
value |= BIT(shift);
else
value &= ~BIT(shift);
writel(value, gwmr);
raw_spin_unlock_irqrestore(&priv->lock, flags);
dev_dbg(priv->dev, "%s wake for gpio %lu\n", str_enable_disable(on), gpio);
return 0;
}
static const struct irq_chip tng_irqchip = {
.name = "gpio-tangier",
.irq_ack = tng_irq_ack,
.irq_mask = tng_irq_mask,
.irq_unmask = tng_irq_unmask,
.irq_set_type = tng_irq_set_type,
.irq_set_wake = tng_irq_set_wake,
.flags = IRQCHIP_IMMUTABLE,
GPIOCHIP_IRQ_RESOURCE_HELPERS,
};
static void tng_irq_handler(struct irq_desc *desc)
{
struct gpio_chip *gc = irq_desc_get_handler_data(desc);
struct tng_gpio *priv = gpiochip_get_data(gc);
struct irq_chip *irqchip = irq_desc_get_chip(desc);
unsigned long base, gpio;
chained_irq_enter(irqchip, desc);
/* Check GPIO controller to check which pin triggered the interrupt */
for (base = 0; base < priv->chip.ngpio; base += 32) {
void __iomem *gisr = gpio_reg(&priv->chip, base, GISR);
void __iomem *gimr = gpio_reg(&priv->chip, base, GIMR);
unsigned long pending, enabled;
pending = readl(gisr);
enabled = readl(gimr);
/* Only interrupts that are enabled */
pending &= enabled;
for_each_set_bit(gpio, &pending, 32)
generic_handle_domain_irq(gc->irq.domain, base + gpio);
}
chained_irq_exit(irqchip, desc);
}
static int tng_irq_init_hw(struct gpio_chip *chip)
{
struct tng_gpio *priv = gpiochip_get_data(chip);
void __iomem *reg;
unsigned int base;
for (base = 0; base < priv->chip.ngpio; base += 32) {
/* Clear the rising-edge detect register */
reg = gpio_reg(&priv->chip, base, GRER);
writel(0, reg);
/* Clear the falling-edge detect register */
reg = gpio_reg(&priv->chip, base, GFER);
writel(0, reg);
}
return 0;
}
static int tng_gpio_add_pin_ranges(struct gpio_chip *chip)
{
struct tng_gpio *priv = gpiochip_get_data(chip);
const struct tng_gpio_pinrange *range;
unsigned int i;
int ret;
for (i = 0; i < priv->pin_info.nranges; i++) {
range = &priv->pin_info.pin_ranges[i];
ret = gpiochip_add_pin_range(&priv->chip,
priv->pin_info.name,
range->gpio_base,
range->pin_base,
range->npins);
if (ret) {
dev_err(priv->dev, "failed to add GPIO pin range\n");
return ret;
}
}
return 0;
}
int devm_tng_gpio_probe(struct device *dev, struct tng_gpio *gpio)
{
const struct tng_gpio_info *info = &gpio->info;
struct gpio_irq_chip *girq;
int ret;
gpio->ctx = devm_kcalloc(dev, DIV_ROUND_UP(info->ngpio, 32), sizeof(*gpio->ctx), GFP_KERNEL);
if (!gpio->ctx)
return -ENOMEM;
gpio->chip.label = dev_name(dev);
gpio->chip.parent = dev;
gpio->chip.request = gpiochip_generic_request;
gpio->chip.free = gpiochip_generic_free;
gpio->chip.direction_input = tng_gpio_direction_input;
gpio->chip.direction_output = tng_gpio_direction_output;
gpio->chip.get = tng_gpio_get;
gpio->chip.set = tng_gpio_set;
gpio->chip.get_direction = tng_gpio_get_direction;
gpio->chip.set_config = tng_gpio_set_config;
gpio->chip.base = info->base;
gpio->chip.ngpio = info->ngpio;
gpio->chip.can_sleep = false;
gpio->chip.add_pin_ranges = tng_gpio_add_pin_ranges;
raw_spin_lock_init(&gpio->lock);
girq = &gpio->chip.irq;
gpio_irq_chip_set_chip(girq, &tng_irqchip);
girq->init_hw = tng_irq_init_hw;
girq->parent_handler = tng_irq_handler;
girq->num_parents = 1;
girq->parents = devm_kcalloc(dev, girq->num_parents,
sizeof(*girq->parents), GFP_KERNEL);
if (!girq->parents)
return -ENOMEM;
girq->parents[0] = gpio->irq;
girq->first = info->first;
girq->default_type = IRQ_TYPE_NONE;
girq->handler = handle_bad_irq;
ret = devm_gpiochip_add_data(dev, &gpio->chip, gpio);
if (ret)
return dev_err_probe(dev, ret, "gpiochip_add error\n");
return 0;
}
EXPORT_SYMBOL_NS_GPL(devm_tng_gpio_probe, GPIO_TANGIER);
int tng_gpio_suspend(struct device *dev)
{
struct tng_gpio *priv = dev_get_drvdata(dev);
struct tng_gpio_context *ctx = priv->ctx;
unsigned long flags;
unsigned int base;
raw_spin_lock_irqsave(&priv->lock, flags);
for (base = 0; base < priv->chip.ngpio; base += 32, ctx++) {
/* GPLR is RO, values read will be restored using GPSR */
ctx->level = readl(gpio_reg(&priv->chip, base, GPLR));
ctx->gpdr = readl(gpio_reg(&priv->chip, base, GPDR));
ctx->grer = readl(gpio_reg(&priv->chip, base, GRER));
ctx->gfer = readl(gpio_reg(&priv->chip, base, GFER));
ctx->gimr = readl(gpio_reg(&priv->chip, base, GIMR));
ctx->gwmr = readl(gpio_reg(&priv->chip, base, priv->wake_regs.gwmr));
}
raw_spin_unlock_irqrestore(&priv->lock, flags);
return 0;
}
EXPORT_SYMBOL_NS_GPL(tng_gpio_suspend, GPIO_TANGIER);
int tng_gpio_resume(struct device *dev)
{
struct tng_gpio *priv = dev_get_drvdata(dev);
struct tng_gpio_context *ctx = priv->ctx;
unsigned long flags;
unsigned int base;
raw_spin_lock_irqsave(&priv->lock, flags);
for (base = 0; base < priv->chip.ngpio; base += 32, ctx++) {
/* GPLR is RO, values read will be restored using GPSR */
writel(ctx->level, gpio_reg(&priv->chip, base, GPSR));
writel(ctx->gpdr, gpio_reg(&priv->chip, base, GPDR));
writel(ctx->grer, gpio_reg(&priv->chip, base, GRER));
writel(ctx->gfer, gpio_reg(&priv->chip, base, GFER));
writel(ctx->gimr, gpio_reg(&priv->chip, base, GIMR));
writel(ctx->gwmr, gpio_reg(&priv->chip, base, priv->wake_regs.gwmr));
}
raw_spin_unlock_irqrestore(&priv->lock, flags);
return 0;
}
EXPORT_SYMBOL_NS_GPL(tng_gpio_resume, GPIO_TANGIER);
MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
MODULE_AUTHOR("Pandith N <pandith.n@intel.com>");
MODULE_AUTHOR("Raag Jadav <raag.jadav@intel.com>");
MODULE_DESCRIPTION("Intel Tangier GPIO driver");
MODULE_LICENSE("GPL");

117
drivers/gpio/gpio-tangier.h Normal file
View File

@ -0,0 +1,117 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Intel Tangier GPIO functions
*
* Copyright (c) 2016, 2021, 2023 Intel Corporation.
*
* Authors: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
* Pandith N <pandith.n@intel.com>
* Raag Jadav <raag.jadav@intel.com>
*/
#ifndef _GPIO_TANGIER_H_
#define _GPIO_TANGIER_H_
#include <linux/gpio/driver.h>
#include <linux/spinlock_types.h>
#include <linux/types.h>
struct device;
struct tng_gpio_context;
/* Elkhart Lake specific wake registers */
#define GWMR_EHL 0x100 /* Wake mask */
#define GWSR_EHL 0x118 /* Wake source */
#define GSIR_EHL 0x130 /* Secure input */
/* Merrifield specific wake registers */
#define GWMR_MRFLD 0x400 /* Wake mask */
#define GWSR_MRFLD 0x418 /* Wake source */
#define GSIR_MRFLD 0xc00 /* Secure input */
/**
* struct tng_wake_regs - Platform specific wake registers
* @gwmr: Wake mask
* @gwsr: Wake source
* @gsir: Secure input
*/
struct tng_wake_regs {
u32 gwmr;
u32 gwsr;
u32 gsir;
};
/**
* struct tng_gpio_pinrange - Map pin numbers to gpio numbers
* @gpio_base: Starting GPIO number of this range
* @pin_base: Starting pin number of this range
* @npins: Number of pins in this range
*/
struct tng_gpio_pinrange {
unsigned int gpio_base;
unsigned int pin_base;
unsigned int npins;
};
#define GPIO_PINRANGE(gstart, gend, pstart) \
(struct tng_gpio_pinrange) { \
.gpio_base = (gstart), \
.pin_base = (pstart), \
.npins = (gend) - (gstart) + 1, \
}
/**
* struct tng_gpio_pin_info - Platform specific pinout information
* @pin_ranges: Pin to GPIO mapping
* @nranges: Number of pin ranges
* @name: Respective pinctrl device name
*/
struct tng_gpio_pin_info {
const struct tng_gpio_pinrange *pin_ranges;
unsigned int nranges;
const char *name;
};
/**
* struct tng_gpio_info - Platform specific GPIO and IRQ information
* @base: GPIO base to start numbering with
* @ngpio: Amount of GPIOs supported by the controller
* @first: First IRQ to start numbering with
*/
struct tng_gpio_info {
int base;
u16 ngpio;
unsigned int first;
};
/**
* struct tng_gpio - Platform specific private data
* @chip: Instance of the struct gpio_chip
* @reg_base: Base address of MMIO registers
* @irq: Interrupt for the GPIO device
* @lock: Synchronization lock to prevent I/O race conditions
* @dev: The GPIO device
* @ctx: Context to be saved during suspend-resume
* @wake_regs: Platform specific wake registers
* @pin_info: Platform specific pinout information
* @info: Platform specific GPIO and IRQ information
*/
struct tng_gpio {
struct gpio_chip chip;
void __iomem *reg_base;
int irq;
raw_spinlock_t lock;
struct device *dev;
struct tng_gpio_context *ctx;
struct tng_wake_regs wake_regs;
struct tng_gpio_pin_info pin_info;
struct tng_gpio_info info;
};
int devm_tng_gpio_probe(struct device *dev, struct tng_gpio *gpio);
int tng_gpio_suspend(struct device *dev);
int tng_gpio_resume(struct device *dev);
#endif /* _GPIO_TANGIER_H_ */

26
drivers/gpio/gpiolib-acpi.c
View File

@ -128,7 +128,7 @@ static bool acpi_gpio_deferred_req_irqs_done;
static int acpi_gpiochip_find(struct gpio_chip *gc, void *data)
{
return gc->parent && device_match_acpi_handle(gc->parent, data);
return ACPI_HANDLE_FWNODE(gc->fwnode) == data;
}
/**
@ -645,7 +645,7 @@ static bool acpi_get_driver_gpio_data(struct acpi_device *adev,
{
const struct acpi_gpio_mapping *gm;
if (!adev->driver_gpios)
if (!adev || !adev->driver_gpios)
return false;
for (gm = adev->driver_gpios; gm->name; gm++)
@ -839,13 +839,10 @@ static int acpi_gpio_property_lookup(struct fwnode_handle *fwnode,
ret = __acpi_node_get_property_reference(fwnode, propname, index, 3,
&args);
if (ret) {
struct acpi_device *adev = to_acpi_device_node(fwnode);
struct acpi_device *adev;
if (!adev)
return ret;
if (!acpi_get_driver_gpio_data(adev, propname, index, &args,
&quirks))
adev = to_acpi_device_node(fwnode);
if (!acpi_get_driver_gpio_data(adev, propname, index, &args, &quirks))
return ret;
}
/*
@ -1616,6 +1613,19 @@ static const struct dmi_system_id gpiolib_acpi_quirks[] __initconst = {
.ignore_interrupt = "AMDI0030:00@18",
},
},
{
/*
* Spurious wakeups from TP_ATTN# pin
* Found in BIOS 1.7.8
* https://gitlab.freedesktop.org/drm/amd/-/issues/1722#note_1720627
*/
.matches = {
DMI_MATCH(DMI_BOARD_NAME, "NL5xNU"),
},
.driver_data = &(struct acpi_gpiolib_dmi_quirk) {
.ignore_wake = "ELAN0415:00@9",
},
},
{
/*
* Spurious wakeups from TP_ATTN# pin