Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 918 insertions, 0 deletions

diff --git a/drivers/pinctrl/intel/pinctrl-lynxpoint.c b/drivers/pinctrl/intel/pinctrl-lynxpoint.c
new file mode 100644
index 0000000000..c3732a9f06
--- /dev/null
+++ b/drivers/pinctrl/intel/pinctrl-lynxpoint.c
@@ -0,0 +1,918 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Intel Lynxpoint PCH pinctrl/GPIO driver
+ *
+ * Copyright (c) 2012, 2019, Intel Corporation
+ * Authors: Mathias Nyman <mathias.nyman@linux.intel.com>
+ *          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/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/seq_file.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+
+#include <linux/pinctrl/consumer.h>
+#include <linux/pinctrl/pinconf-generic.h>
+#include <linux/pinctrl/pinconf.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinmux.h>
+
+#include "pinctrl-intel.h"
+
+#define COMMUNITY(p, n)			\
+	{				\
+		.pin_base	= (p),	\
+		.npins		= (n),	\
+	}
+
+static const struct pinctrl_pin_desc lptlp_pins[] = {
+	PINCTRL_PIN(0, "GP0_UART1_RXD"),
+	PINCTRL_PIN(1, "GP1_UART1_TXD"),
+	PINCTRL_PIN(2, "GP2_UART1_RTSB"),
+	PINCTRL_PIN(3, "GP3_UART1_CTSB"),
+	PINCTRL_PIN(4, "GP4_I2C0_SDA"),
+	PINCTRL_PIN(5, "GP5_I2C0_SCL"),
+	PINCTRL_PIN(6, "GP6_I2C1_SDA"),
+	PINCTRL_PIN(7, "GP7_I2C1_SCL"),
+	PINCTRL_PIN(8, "GP8"),
+	PINCTRL_PIN(9, "GP9"),
+	PINCTRL_PIN(10, "GP10"),
+	PINCTRL_PIN(11, "GP11_SMBALERTB"),
+	PINCTRL_PIN(12, "GP12_LANPHYPC"),
+	PINCTRL_PIN(13, "GP13"),
+	PINCTRL_PIN(14, "GP14"),
+	PINCTRL_PIN(15, "GP15"),
+	PINCTRL_PIN(16, "GP16_MGPIO9"),
+	PINCTRL_PIN(17, "GP17_MGPIO10"),
+	PINCTRL_PIN(18, "GP18_SRC0CLKRQB"),
+	PINCTRL_PIN(19, "GP19_SRC1CLKRQB"),
+	PINCTRL_PIN(20, "GP20_SRC2CLKRQB"),
+	PINCTRL_PIN(21, "GP21_SRC3CLKRQB"),
+	PINCTRL_PIN(22, "GP22_SRC4CLKRQB_TRST2"),
+	PINCTRL_PIN(23, "GP23_SRC5CLKRQB_TDI2"),
+	PINCTRL_PIN(24, "GP24_MGPIO0"),
+	PINCTRL_PIN(25, "GP25_USBWAKEOUTB"),
+	PINCTRL_PIN(26, "GP26_MGPIO5"),
+	PINCTRL_PIN(27, "GP27_MGPIO6"),
+	PINCTRL_PIN(28, "GP28_MGPIO7"),
+	PINCTRL_PIN(29, "GP29_SLP_WLANB_MGPIO3"),
+	PINCTRL_PIN(30, "GP30_SUSWARNB_SUSPWRDNACK_MGPIO1"),
+	PINCTRL_PIN(31, "GP31_ACPRESENT_MGPIO2"),
+	PINCTRL_PIN(32, "GP32_CLKRUNB"),
+	PINCTRL_PIN(33, "GP33_DEVSLP0"),
+	PINCTRL_PIN(34, "GP34_SATA0XPCIE6L3B_SATA0GP"),
+	PINCTRL_PIN(35, "GP35_SATA1XPCIE6L2B_SATA1GP"),
+	PINCTRL_PIN(36, "GP36_SATA2XPCIE6L1B_SATA2GP"),
+	PINCTRL_PIN(37, "GP37_SATA3XPCIE6L0B_SATA3GP"),
+	PINCTRL_PIN(38, "GP38_DEVSLP1"),
+	PINCTRL_PIN(39, "GP39_DEVSLP2"),
+	PINCTRL_PIN(40, "GP40_OC0B"),
+	PINCTRL_PIN(41, "GP41_OC1B"),
+	PINCTRL_PIN(42, "GP42_OC2B"),
+	PINCTRL_PIN(43, "GP43_OC3B"),
+	PINCTRL_PIN(44, "GP44"),
+	PINCTRL_PIN(45, "GP45_TMS2"),
+	PINCTRL_PIN(46, "GP46_TDO2"),
+	PINCTRL_PIN(47, "GP47"),
+	PINCTRL_PIN(48, "GP48"),
+	PINCTRL_PIN(49, "GP49"),
+	PINCTRL_PIN(50, "GP50"),
+	PINCTRL_PIN(51, "GP51_GSXDOUT"),
+	PINCTRL_PIN(52, "GP52_GSXSLOAD"),
+	PINCTRL_PIN(53, "GP53_GSXDIN"),
+	PINCTRL_PIN(54, "GP54_GSXSRESETB"),
+	PINCTRL_PIN(55, "GP55_GSXCLK"),
+	PINCTRL_PIN(56, "GP56"),
+	PINCTRL_PIN(57, "GP57"),
+	PINCTRL_PIN(58, "GP58"),
+	PINCTRL_PIN(59, "GP59"),
+	PINCTRL_PIN(60, "GP60_SML0ALERTB_MGPIO4"),
+	PINCTRL_PIN(61, "GP61_SUS_STATB"),
+	PINCTRL_PIN(62, "GP62_SUSCLK"),
+	PINCTRL_PIN(63, "GP63_SLP_S5B"),
+	PINCTRL_PIN(64, "GP64_SDIO_CLK"),
+	PINCTRL_PIN(65, "GP65_SDIO_CMD"),
+	PINCTRL_PIN(66, "GP66_SDIO_D0"),
+	PINCTRL_PIN(67, "GP67_SDIO_D1"),
+	PINCTRL_PIN(68, "GP68_SDIO_D2"),
+	PINCTRL_PIN(69, "GP69_SDIO_D3"),
+	PINCTRL_PIN(70, "GP70_SDIO_POWER_EN"),
+	PINCTRL_PIN(71, "GP71_MPHYPC"),
+	PINCTRL_PIN(72, "GP72_BATLOWB"),
+	PINCTRL_PIN(73, "GP73_SML1ALERTB_PCHHOTB_MGPIO8"),
+	PINCTRL_PIN(74, "GP74_SML1DATA_MGPIO12"),
+	PINCTRL_PIN(75, "GP75_SML1CLK_MGPIO11"),
+	PINCTRL_PIN(76, "GP76_BMBUSYB"),
+	PINCTRL_PIN(77, "GP77_PIRQAB"),
+	PINCTRL_PIN(78, "GP78_PIRQBB"),
+	PINCTRL_PIN(79, "GP79_PIRQCB"),
+	PINCTRL_PIN(80, "GP80_PIRQDB"),
+	PINCTRL_PIN(81, "GP81_SPKR"),
+	PINCTRL_PIN(82, "GP82_RCINB"),
+	PINCTRL_PIN(83, "GP83_GSPI0_CSB"),
+	PINCTRL_PIN(84, "GP84_GSPI0_CLK"),
+	PINCTRL_PIN(85, "GP85_GSPI0_MISO"),
+	PINCTRL_PIN(86, "GP86_GSPI0_MOSI"),
+	PINCTRL_PIN(87, "GP87_GSPI1_CSB"),
+	PINCTRL_PIN(88, "GP88_GSPI1_CLK"),
+	PINCTRL_PIN(89, "GP89_GSPI1_MISO"),
+	PINCTRL_PIN(90, "GP90_GSPI1_MOSI"),
+	PINCTRL_PIN(91, "GP91_UART0_RXD"),
+	PINCTRL_PIN(92, "GP92_UART0_TXD"),
+	PINCTRL_PIN(93, "GP93_UART0_RTSB"),
+	PINCTRL_PIN(94, "GP94_UART0_CTSB"),
+};
+
+static const struct intel_community lptlp_communities[] = {
+	COMMUNITY(0, 95),
+};
+
+static const struct intel_pinctrl_soc_data lptlp_soc_data = {
+	.pins		= lptlp_pins,
+	.npins		= ARRAY_SIZE(lptlp_pins),
+	.communities	= lptlp_communities,
+	.ncommunities	= ARRAY_SIZE(lptlp_communities),
+};
+
+/* LynxPoint chipset has support for 95 GPIO pins */
+
+#define LP_NUM_GPIO	95
+
+/* Bitmapped register offsets */
+#define LP_ACPI_OWNED	0x00 /* Bitmap, set by bios, 0: pin reserved for ACPI */
+#define LP_IRQ2IOXAPIC	0x10 /* Bitmap, set by bios, 1: pin routed to IOxAPIC */
+#define LP_GC		0x7C /* set APIC IRQ to IRQ14 or IRQ15 for all pins */
+#define LP_INT_STAT	0x80
+#define LP_INT_ENABLE	0x90
+
+/* Each pin has two 32 bit config registers, starting at 0x100 */
+#define LP_CONFIG1	0x100
+#define LP_CONFIG2	0x104
+
+/* LP_CONFIG1 reg bits */
+#define OUT_LVL_BIT	BIT(31)
+#define IN_LVL_BIT	BIT(30)
+#define TRIG_SEL_BIT	BIT(4) /* 0: Edge, 1: Level */
+#define INT_INV_BIT	BIT(3) /* Invert interrupt triggering */
+#define DIR_BIT		BIT(2) /* 0: Output, 1: Input */
+#define USE_SEL_MASK	GENMASK(1, 0)	/* 0: Native, 1: GPIO, ... */
+#define USE_SEL_NATIVE	(0 << 0)
+#define USE_SEL_GPIO	(1 << 0)
+
+/* LP_CONFIG2 reg bits */
+#define GPINDIS_BIT	BIT(2) /* disable input sensing */
+#define GPIWP_MASK	GENMASK(1, 0)	/* weak pull options */
+#define GPIWP_NONE	0		/* none */
+#define GPIWP_DOWN	1		/* weak pull down */
+#define GPIWP_UP	2		/* weak pull up */
+
+/*
+ * Lynxpoint gpios are controlled through both bitmapped registers and
+ * per gpio specific registers. The bitmapped registers are in chunks of
+ * 3 x 32bit registers to cover all 95 GPIOs
+ *
+ * per gpio specific registers consist of two 32bit registers per gpio
+ * (LP_CONFIG1 and LP_CONFIG2), with 95 GPIOs there's a total of
+ * 190 config registers.
+ *
+ * A simplified view of the register layout look like this:
+ *
+ * LP_ACPI_OWNED[31:0] gpio ownerships for gpios 0-31  (bitmapped registers)
+ * LP_ACPI_OWNED[63:32] gpio ownerships for gpios 32-63
+ * LP_ACPI_OWNED[94:64] gpio ownerships for gpios 63-94
+ * ...
+ * LP_INT_ENABLE[31:0] ...
+ * LP_INT_ENABLE[63:32] ...
+ * LP_INT_ENABLE[94:64] ...
+ * LP0_CONFIG1 (gpio 0) config1 reg for gpio 0 (per gpio registers)
+ * LP0_CONFIG2 (gpio 0) config2 reg for gpio 0
+ * LP1_CONFIG1 (gpio 1) config1 reg for gpio 1
+ * LP1_CONFIG2 (gpio 1) config2 reg for gpio 1
+ * LP2_CONFIG1 (gpio 2) ...
+ * LP2_CONFIG2 (gpio 2) ...
+ * ...
+ * LP94_CONFIG1 (gpio 94) ...
+ * LP94_CONFIG2 (gpio 94) ...
+ *
+ * IOxAPIC redirection map applies only for gpio 8-10, 13-14, 45-55.
+ */
+
+static void __iomem *lp_gpio_reg(struct gpio_chip *chip, unsigned int offset,
+				 int reg)
+{
+	struct intel_pinctrl *lg = gpiochip_get_data(chip);
+	struct intel_community *comm;
+	int reg_offset;
+
+	comm = intel_get_community(lg, offset);
+	if (!comm)
+		return NULL;
+
+	offset -= comm->pin_base;
+
+	if (reg == LP_CONFIG1 || reg == LP_CONFIG2)
+		/* per gpio specific config registers */
+		reg_offset = offset * 8;
+	else
+		/* bitmapped registers */
+		reg_offset = (offset / 32) * 4;
+
+	return comm->regs + reg_offset + reg;
+}
+
+static bool lp_gpio_acpi_use(struct intel_pinctrl *lg, unsigned int pin)
+{
+	void __iomem *acpi_use;
+
+	acpi_use = lp_gpio_reg(&lg->chip, pin, LP_ACPI_OWNED);
+	if (!acpi_use)
+		return true;
+
+	return !(ioread32(acpi_use) & BIT(pin % 32));
+}
+
+static bool lp_gpio_ioxapic_use(struct gpio_chip *chip, unsigned int offset)
+{
+	void __iomem *ioxapic_use = lp_gpio_reg(chip, offset, LP_IRQ2IOXAPIC);
+	u32 value;
+
+	value = ioread32(ioxapic_use);
+
+	if (offset >= 8 && offset <= 10)
+		return !!(value & BIT(offset -  8 + 0));
+	if (offset >= 13 && offset <= 14)
+		return !!(value & BIT(offset - 13 + 3));
+	if (offset >= 45 && offset <= 55)
+		return !!(value & BIT(offset - 45 + 5));
+
+	return false;
+}
+
+static void lp_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s,
+			    unsigned int pin)
+{
+	struct intel_pinctrl *lg = pinctrl_dev_get_drvdata(pctldev);
+	void __iomem *reg = lp_gpio_reg(&lg->chip, pin, LP_CONFIG1);
+	void __iomem *conf2 = lp_gpio_reg(&lg->chip, pin, LP_CONFIG2);
+	u32 value, mode;
+
+	value = ioread32(reg);
+
+	mode = value & USE_SEL_MASK;
+	if (mode == USE_SEL_GPIO)
+		seq_puts(s, "GPIO ");
+	else
+		seq_printf(s, "mode %d ", mode);
+
+	seq_printf(s, "0x%08x 0x%08x", value, ioread32(conf2));
+
+	if (lp_gpio_acpi_use(lg, pin))
+		seq_puts(s, " [ACPI]");
+}
+
+static const struct pinctrl_ops lptlp_pinctrl_ops = {
+	.get_groups_count	= intel_get_groups_count,
+	.get_group_name		= intel_get_group_name,
+	.get_group_pins		= intel_get_group_pins,
+	.pin_dbg_show		= lp_pin_dbg_show,
+};
+
+static int lp_pinmux_set_mux(struct pinctrl_dev *pctldev,
+			     unsigned int function, unsigned int group)
+{
+	struct intel_pinctrl *lg = pinctrl_dev_get_drvdata(pctldev);
+	const struct intel_pingroup *grp = &lg->soc->groups[group];
+	unsigned long flags;
+	int i;
+
+	raw_spin_lock_irqsave(&lg->lock, flags);
+
+	/* Now enable the mux setting for each pin in the group */
+	for (i = 0; i < grp->grp.npins; i++) {
+		void __iomem *reg = lp_gpio_reg(&lg->chip, grp->grp.pins[i], LP_CONFIG1);
+		u32 value;
+
+		value = ioread32(reg);
+
+		value &= ~USE_SEL_MASK;
+		if (grp->modes)
+			value |= grp->modes[i];
+		else
+			value |= grp->mode;
+
+		iowrite32(value, reg);
+	}
+
+	raw_spin_unlock_irqrestore(&lg->lock, flags);
+
+	return 0;
+}
+
+static void lp_gpio_enable_input(void __iomem *reg)
+{
+	iowrite32(ioread32(reg) & ~GPINDIS_BIT, reg);
+}
+
+static void lp_gpio_disable_input(void __iomem *reg)
+{
+	iowrite32(ioread32(reg) | GPINDIS_BIT, reg);
+}
+
+static int lp_gpio_request_enable(struct pinctrl_dev *pctldev,
+				  struct pinctrl_gpio_range *range,
+				  unsigned int pin)
+{
+	struct intel_pinctrl *lg = pinctrl_dev_get_drvdata(pctldev);
+	void __iomem *reg = lp_gpio_reg(&lg->chip, pin, LP_CONFIG1);
+	void __iomem *conf2 = lp_gpio_reg(&lg->chip, pin, LP_CONFIG2);
+	unsigned long flags;
+	u32 value;
+
+	pm_runtime_get(lg->dev);
+
+	raw_spin_lock_irqsave(&lg->lock, flags);
+
+	/*
+	 * Reconfigure pin to GPIO mode if needed and issue a warning,
+	 * since we expect firmware to configure it properly.
+	 */
+	value = ioread32(reg);
+	if ((value & USE_SEL_MASK) != USE_SEL_GPIO) {
+		iowrite32((value & USE_SEL_MASK) | USE_SEL_GPIO, reg);
+		dev_warn(lg->dev, FW_BUG "pin %u forcibly reconfigured as GPIO\n", pin);
+	}
+
+	/* Enable input sensing */
+	lp_gpio_enable_input(conf2);
+
+	raw_spin_unlock_irqrestore(&lg->lock, flags);
+
+	return 0;
+}
+
+static void lp_gpio_disable_free(struct pinctrl_dev *pctldev,
+				 struct pinctrl_gpio_range *range,
+				 unsigned int pin)
+{
+	struct intel_pinctrl *lg = pinctrl_dev_get_drvdata(pctldev);
+	void __iomem *conf2 = lp_gpio_reg(&lg->chip, pin, LP_CONFIG2);
+	unsigned long flags;
+
+	raw_spin_lock_irqsave(&lg->lock, flags);
+
+	/* Disable input sensing */
+	lp_gpio_disable_input(conf2);
+
+	raw_spin_unlock_irqrestore(&lg->lock, flags);
+
+	pm_runtime_put(lg->dev);
+}
+
+static int lp_gpio_set_direction(struct pinctrl_dev *pctldev,
+				 struct pinctrl_gpio_range *range,
+				 unsigned int pin, bool input)
+{
+	struct intel_pinctrl *lg = pinctrl_dev_get_drvdata(pctldev);
+	void __iomem *reg = lp_gpio_reg(&lg->chip, pin, LP_CONFIG1);
+	unsigned long flags;
+	u32 value;
+
+	raw_spin_lock_irqsave(&lg->lock, flags);
+
+	value = ioread32(reg);
+	value &= ~DIR_BIT;
+	if (input) {
+		value |= DIR_BIT;
+	} else {
+		/*
+		 * Before making any direction modifications, do a check if GPIO
+		 * is set for direct IRQ. On Lynxpoint, setting GPIO to output
+		 * does not make sense, so let's at least warn the caller before
+		 * they shoot themselves in the foot.
+		 */
+		WARN(lp_gpio_ioxapic_use(&lg->chip, pin),
+		     "Potential Error: Setting GPIO to output with IOxAPIC redirection");
+	}
+	iowrite32(value, reg);
+
+	raw_spin_unlock_irqrestore(&lg->lock, flags);
+
+	return 0;
+}
+
+static const struct pinmux_ops lptlp_pinmux_ops = {
+	.get_functions_count	= intel_get_functions_count,
+	.get_function_name	= intel_get_function_name,
+	.get_function_groups	= intel_get_function_groups,
+	.set_mux		= lp_pinmux_set_mux,
+	.gpio_request_enable	= lp_gpio_request_enable,
+	.gpio_disable_free	= lp_gpio_disable_free,
+	.gpio_set_direction	= lp_gpio_set_direction,
+};
+
+static int lp_pin_config_get(struct pinctrl_dev *pctldev, unsigned int pin,
+			     unsigned long *config)
+{
+	struct intel_pinctrl *lg = pinctrl_dev_get_drvdata(pctldev);
+	void __iomem *conf2 = lp_gpio_reg(&lg->chip, pin, LP_CONFIG2);
+	enum pin_config_param param = pinconf_to_config_param(*config);
+	unsigned long flags;
+	u32 value, pull;
+	u16 arg;
+
+	raw_spin_lock_irqsave(&lg->lock, flags);
+	value = ioread32(conf2);
+	raw_spin_unlock_irqrestore(&lg->lock, flags);
+
+	pull = value & GPIWP_MASK;
+
+	switch (param) {
+	case PIN_CONFIG_BIAS_DISABLE:
+		if (pull != GPIWP_NONE)
+			return -EINVAL;
+		arg = 0;
+		break;
+	case PIN_CONFIG_BIAS_PULL_DOWN:
+		if (pull != GPIWP_DOWN)
+			return -EINVAL;
+
+		arg = 1;
+		break;
+	case PIN_CONFIG_BIAS_PULL_UP:
+		if (pull != GPIWP_UP)
+			return -EINVAL;
+
+		arg = 1;
+		break;
+	default:
+		return -ENOTSUPP;
+	}
+
+	*config = pinconf_to_config_packed(param, arg);
+
+	return 0;
+}
+
+static int lp_pin_config_set(struct pinctrl_dev *pctldev, unsigned int pin,
+			     unsigned long *configs, unsigned int num_configs)
+{
+	struct intel_pinctrl *lg = pinctrl_dev_get_drvdata(pctldev);
+	void __iomem *conf2 = lp_gpio_reg(&lg->chip, pin, LP_CONFIG2);
+	enum pin_config_param param;
+	unsigned long flags;
+	int i, ret = 0;
+	u32 value;
+
+	raw_spin_lock_irqsave(&lg->lock, flags);
+
+	value = ioread32(conf2);
+
+	for (i = 0; i < num_configs; i++) {
+		param = pinconf_to_config_param(configs[i]);
+
+		switch (param) {
+		case PIN_CONFIG_BIAS_DISABLE:
+			value &= ~GPIWP_MASK;
+			value |= GPIWP_NONE;
+			break;
+		case PIN_CONFIG_BIAS_PULL_DOWN:
+			value &= ~GPIWP_MASK;
+			value |= GPIWP_DOWN;
+			break;
+		case PIN_CONFIG_BIAS_PULL_UP:
+			value &= ~GPIWP_MASK;
+			value |= GPIWP_UP;
+			break;
+		default:
+			ret = -ENOTSUPP;
+		}
+
+		if (ret)
+			break;
+	}
+
+	if (!ret)
+		iowrite32(value, conf2);
+
+	raw_spin_unlock_irqrestore(&lg->lock, flags);
+
+	return ret;
+}
+
+static const struct pinconf_ops lptlp_pinconf_ops = {
+	.is_generic	= true,
+	.pin_config_get	= lp_pin_config_get,
+	.pin_config_set	= lp_pin_config_set,
+};
+
+static const struct pinctrl_desc lptlp_pinctrl_desc = {
+	.pctlops	= &lptlp_pinctrl_ops,
+	.pmxops		= &lptlp_pinmux_ops,
+	.confops	= &lptlp_pinconf_ops,
+	.owner		= THIS_MODULE,
+};
+
+static int lp_gpio_get(struct gpio_chip *chip, unsigned int offset)
+{
+	void __iomem *reg = lp_gpio_reg(chip, offset, LP_CONFIG1);
+	return !!(ioread32(reg) & IN_LVL_BIT);
+}
+
+static void lp_gpio_set(struct gpio_chip *chip, unsigned int offset, int value)
+{
+	struct intel_pinctrl *lg = gpiochip_get_data(chip);
+	void __iomem *reg = lp_gpio_reg(chip, offset, LP_CONFIG1);
+	unsigned long flags;
+
+	raw_spin_lock_irqsave(&lg->lock, flags);
+
+	if (value)
+		iowrite32(ioread32(reg) | OUT_LVL_BIT, reg);
+	else
+		iowrite32(ioread32(reg) & ~OUT_LVL_BIT, reg);
+
+	raw_spin_unlock_irqrestore(&lg->lock, flags);
+}
+
+static int lp_gpio_direction_input(struct gpio_chip *chip, unsigned int offset)
+{
+	return pinctrl_gpio_direction_input(chip->base + offset);
+}
+
+static int lp_gpio_direction_output(struct gpio_chip *chip, unsigned int offset,
+				    int value)
+{
+	lp_gpio_set(chip, offset, value);
+
+	return pinctrl_gpio_direction_output(chip->base + offset);
+}
+
+static int lp_gpio_get_direction(struct gpio_chip *chip, unsigned int offset)
+{
+	void __iomem *reg = lp_gpio_reg(chip, offset, LP_CONFIG1);
+
+	if (ioread32(reg) & DIR_BIT)
+		return GPIO_LINE_DIRECTION_IN;
+
+	return GPIO_LINE_DIRECTION_OUT;
+}
+
+static void lp_gpio_irq_handler(struct irq_desc *desc)
+{
+	struct irq_data *data = irq_desc_get_irq_data(desc);
+	struct gpio_chip *gc = irq_desc_get_handler_data(desc);
+	struct intel_pinctrl *lg = gpiochip_get_data(gc);
+	struct irq_chip *chip = irq_data_get_irq_chip(data);
+	void __iomem *reg, *ena;
+	unsigned long pending;
+	u32 base, pin;
+
+	/* check from GPIO controller which pin triggered the interrupt */
+	for (base = 0; base < lg->chip.ngpio; base += 32) {
+		reg = lp_gpio_reg(&lg->chip, base, LP_INT_STAT);
+		ena = lp_gpio_reg(&lg->chip, base, LP_INT_ENABLE);
+
+		/* Only interrupts that are enabled */
+		pending = ioread32(reg) & ioread32(ena);
+
+		for_each_set_bit(pin, &pending, 32)
+			generic_handle_domain_irq(lg->chip.irq.domain, base + pin);
+	}
+	chip->irq_eoi(data);
+}
+
+static void lp_irq_ack(struct irq_data *d)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct intel_pinctrl *lg = gpiochip_get_data(gc);
+	irq_hw_number_t hwirq = irqd_to_hwirq(d);
+	void __iomem *reg = lp_gpio_reg(&lg->chip, hwirq, LP_INT_STAT);
+	unsigned long flags;
+
+	raw_spin_lock_irqsave(&lg->lock, flags);
+	iowrite32(BIT(hwirq % 32), reg);
+	raw_spin_unlock_irqrestore(&lg->lock, flags);
+}
+
+static void lp_irq_unmask(struct irq_data *d)
+{
+}
+
+static void lp_irq_mask(struct irq_data *d)
+{
+}
+
+static void lp_irq_enable(struct irq_data *d)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct intel_pinctrl *lg = gpiochip_get_data(gc);
+	irq_hw_number_t hwirq = irqd_to_hwirq(d);
+	void __iomem *reg = lp_gpio_reg(&lg->chip, hwirq, LP_INT_ENABLE);
+	unsigned long flags;
+
+	gpiochip_enable_irq(gc, hwirq);
+
+	raw_spin_lock_irqsave(&lg->lock, flags);
+	iowrite32(ioread32(reg) | BIT(hwirq % 32), reg);
+	raw_spin_unlock_irqrestore(&lg->lock, flags);
+}
+
+static void lp_irq_disable(struct irq_data *d)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct intel_pinctrl *lg = gpiochip_get_data(gc);
+	irq_hw_number_t hwirq = irqd_to_hwirq(d);
+	void __iomem *reg = lp_gpio_reg(&lg->chip, hwirq, LP_INT_ENABLE);
+	unsigned long flags;
+
+	raw_spin_lock_irqsave(&lg->lock, flags);
+	iowrite32(ioread32(reg) & ~BIT(hwirq % 32), reg);
+	raw_spin_unlock_irqrestore(&lg->lock, flags);
+
+	gpiochip_disable_irq(gc, hwirq);
+}
+
+static int lp_irq_set_type(struct irq_data *d, unsigned int type)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct intel_pinctrl *lg = gpiochip_get_data(gc);
+	irq_hw_number_t hwirq = irqd_to_hwirq(d);
+	unsigned long flags;
+	void __iomem *reg;
+	u32 value;
+
+	reg = lp_gpio_reg(&lg->chip, hwirq, LP_CONFIG1);
+	if (!reg)
+		return -EINVAL;
+
+	/* Fail if BIOS reserved pin for ACPI use */
+	if (lp_gpio_acpi_use(lg, hwirq)) {
+		dev_err(lg->dev, "pin %lu can't be used as IRQ\n", hwirq);
+		return -EBUSY;
+	}
+
+	raw_spin_lock_irqsave(&lg->lock, flags);
+	value = ioread32(reg);
+
+	/* set both TRIG_SEL and INV bits to 0 for rising edge */
+	if (type & IRQ_TYPE_EDGE_RISING)
+		value &= ~(TRIG_SEL_BIT | INT_INV_BIT);
+
+	/* TRIG_SEL bit 0, INV bit 1 for falling edge */
+	if (type & IRQ_TYPE_EDGE_FALLING)
+		value = (value | INT_INV_BIT) & ~TRIG_SEL_BIT;
+
+	/* TRIG_SEL bit 1, INV bit 0 for level low */
+	if (type & IRQ_TYPE_LEVEL_LOW)
+		value = (value | TRIG_SEL_BIT) & ~INT_INV_BIT;
+
+	/* TRIG_SEL bit 1, INV bit 1 for level high */
+	if (type & IRQ_TYPE_LEVEL_HIGH)
+		value |= TRIG_SEL_BIT | INT_INV_BIT;
+
+	iowrite32(value, reg);
+
+	if (type & IRQ_TYPE_EDGE_BOTH)
+		irq_set_handler_locked(d, handle_edge_irq);
+	else if (type & IRQ_TYPE_LEVEL_MASK)
+		irq_set_handler_locked(d, handle_level_irq);
+
+	raw_spin_unlock_irqrestore(&lg->lock, flags);
+
+	return 0;
+}
+
+static const struct irq_chip lp_irqchip = {
+	.name = "LP-GPIO",
+	.irq_ack = lp_irq_ack,
+	.irq_mask = lp_irq_mask,
+	.irq_unmask = lp_irq_unmask,
+	.irq_enable = lp_irq_enable,
+	.irq_disable = lp_irq_disable,
+	.irq_set_type = lp_irq_set_type,
+	.flags = IRQCHIP_SKIP_SET_WAKE | IRQCHIP_IMMUTABLE,
+	GPIOCHIP_IRQ_RESOURCE_HELPERS,
+};
+
+static int lp_gpio_irq_init_hw(struct gpio_chip *chip)
+{
+	struct intel_pinctrl *lg = gpiochip_get_data(chip);
+	void __iomem *reg;
+	unsigned int base;
+
+	for (base = 0; base < lg->chip.ngpio; base += 32) {
+		/* disable gpio pin interrupts */
+		reg = lp_gpio_reg(&lg->chip, base, LP_INT_ENABLE);
+		iowrite32(0, reg);
+		/* Clear interrupt status register */
+		reg = lp_gpio_reg(&lg->chip, base, LP_INT_STAT);
+		iowrite32(0xffffffff, reg);
+	}
+
+	return 0;
+}
+
+static int lp_gpio_add_pin_ranges(struct gpio_chip *chip)
+{
+	struct intel_pinctrl *lg = gpiochip_get_data(chip);
+	struct device *dev = lg->dev;
+	int ret;
+
+	ret = gpiochip_add_pin_range(chip, dev_name(dev), 0, 0, lg->soc->npins);
+	if (ret)
+		dev_err(dev, "failed to add GPIO pin range\n");
+
+	return ret;
+}
+
+static int lp_gpio_probe(struct platform_device *pdev)
+{
+	const struct intel_pinctrl_soc_data *soc;
+	struct intel_pinctrl *lg;
+	struct gpio_chip *gc;
+	struct device *dev = &pdev->dev;
+	struct resource *io_rc;
+	void __iomem *regs;
+	unsigned int i;
+	int irq, ret;
+
+	soc = (const struct intel_pinctrl_soc_data *)device_get_match_data(dev);
+	if (!soc)
+		return -ENODEV;
+
+	lg = devm_kzalloc(dev, sizeof(*lg), GFP_KERNEL);
+	if (!lg)
+		return -ENOMEM;
+
+	lg->dev = dev;
+	lg->soc = soc;
+
+	lg->ncommunities = lg->soc->ncommunities;
+	lg->communities = devm_kcalloc(dev, lg->ncommunities,
+				       sizeof(*lg->communities), GFP_KERNEL);
+	if (!lg->communities)
+		return -ENOMEM;
+
+	lg->pctldesc           = lptlp_pinctrl_desc;
+	lg->pctldesc.name      = dev_name(dev);
+	lg->pctldesc.pins      = lg->soc->pins;
+	lg->pctldesc.npins     = lg->soc->npins;
+
+	lg->pctldev = devm_pinctrl_register(dev, &lg->pctldesc, lg);
+	if (IS_ERR(lg->pctldev)) {
+		dev_err(dev, "failed to register pinctrl driver\n");
+		return PTR_ERR(lg->pctldev);
+	}
+
+	platform_set_drvdata(pdev, lg);
+
+	io_rc = platform_get_resource(pdev, IORESOURCE_IO, 0);
+	if (!io_rc) {
+		dev_err(dev, "missing IO resources\n");
+		return -EINVAL;
+	}
+
+	regs = devm_ioport_map(dev, io_rc->start, resource_size(io_rc));
+	if (!regs) {
+		dev_err(dev, "failed mapping IO region %pR\n", &io_rc);
+		return -EBUSY;
+	}
+
+	for (i = 0; i < lg->soc->ncommunities; i++) {
+		struct intel_community *comm = &lg->communities[i];
+
+		*comm = lg->soc->communities[i];
+
+		comm->regs = regs;
+		comm->pad_regs = regs + 0x100;
+	}
+
+	raw_spin_lock_init(&lg->lock);
+
+	gc = &lg->chip;
+	gc->label = dev_name(dev);
+	gc->owner = THIS_MODULE;
+	gc->request = gpiochip_generic_request;
+	gc->free = gpiochip_generic_free;
+	gc->direction_input = lp_gpio_direction_input;
+	gc->direction_output = lp_gpio_direction_output;
+	gc->get = lp_gpio_get;
+	gc->set = lp_gpio_set;
+	gc->set_config = gpiochip_generic_config;
+	gc->get_direction = lp_gpio_get_direction;
+	gc->base = -1;
+	gc->ngpio = LP_NUM_GPIO;
+	gc->can_sleep = false;
+	gc->add_pin_ranges = lp_gpio_add_pin_ranges;
+	gc->parent = dev;
+
+	/* set up interrupts  */
+	irq = platform_get_irq_optional(pdev, 0);
+	if (irq > 0) {
+		struct gpio_irq_chip *girq;
+
+		girq = &gc->irq;
+		gpio_irq_chip_set_chip(girq, &lp_irqchip);
+		girq->init_hw = lp_gpio_irq_init_hw;
+		girq->parent_handler = lp_gpio_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] = irq;
+		girq->default_type = IRQ_TYPE_NONE;
+		girq->handler = handle_bad_irq;
+	}
+
+	ret = devm_gpiochip_add_data(dev, gc, lg);
+	if (ret) {
+		dev_err(dev, "failed adding lp-gpio chip\n");
+		return ret;
+	}
+
+	pm_runtime_enable(dev);
+
+	return 0;
+}
+
+static int lp_gpio_remove(struct platform_device *pdev)
+{
+	pm_runtime_disable(&pdev->dev);
+	return 0;
+}
+
+static int lp_gpio_runtime_suspend(struct device *dev)
+{
+	return 0;
+}
+
+static int lp_gpio_runtime_resume(struct device *dev)
+{
+	return 0;
+}
+
+static int lp_gpio_resume(struct device *dev)
+{
+	struct intel_pinctrl *lg = dev_get_drvdata(dev);
+	struct gpio_chip *chip = &lg->chip;
+	const char *dummy;
+	int i;
+
+	/* on some hardware suspend clears input sensing, re-enable it here */
+	for_each_requested_gpio(chip, i, dummy)
+		lp_gpio_enable_input(lp_gpio_reg(chip, i, LP_CONFIG2));
+
+	return 0;
+}
+
+static const struct dev_pm_ops lp_gpio_pm_ops = {
+	SYSTEM_SLEEP_PM_OPS(NULL, lp_gpio_resume)
+	RUNTIME_PM_OPS(lp_gpio_runtime_suspend, lp_gpio_runtime_resume, NULL)
+};
+
+static const struct acpi_device_id lynxpoint_gpio_acpi_match[] = {
+	{ "INT33C7", (kernel_ulong_t)&lptlp_soc_data },
+	{ "INT3437", (kernel_ulong_t)&lptlp_soc_data },
+	{ }
+};
+MODULE_DEVICE_TABLE(acpi, lynxpoint_gpio_acpi_match);
+
+static struct platform_driver lp_gpio_driver = {
+	.probe          = lp_gpio_probe,
+	.remove         = lp_gpio_remove,
+	.driver         = {
+		.name   = "lp_gpio",
+		.pm	= pm_ptr(&lp_gpio_pm_ops),
+		.acpi_match_table = lynxpoint_gpio_acpi_match,
+	},
+};
+
+static int __init lp_gpio_init(void)
+{
+	return platform_driver_register(&lp_gpio_driver);
+}
+subsys_initcall(lp_gpio_init);
+
+static void __exit lp_gpio_exit(void)
+{
+	platform_driver_unregister(&lp_gpio_driver);
+}
+module_exit(lp_gpio_exit);
+
+MODULE_AUTHOR("Mathias Nyman (Intel)");
+MODULE_AUTHOR("Andy Shevchenko (Intel)");
+MODULE_DESCRIPTION("Intel Lynxpoint pinctrl driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:lp_gpio");
+MODULE_IMPORT_NS(PINCTRL_INTEL);