Adding upstream version 5.10.209.upstream/5.10.209

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

1 files changed, 1475 insertions, 0 deletions

diff --git a/drivers/pinctrl/qcom/pinctrl-msm.c b/drivers/pinctrl/qcom/pinctrl-msm.c
new file mode 100644
index 000000000..37526aa1f
--- /dev/null
+++ b/drivers/pinctrl/qcom/pinctrl-msm.c
@@ -0,0 +1,1475 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2013, Sony Mobile Communications AB.
+ * Copyright (c) 2013, The Linux Foundation. All rights reserved.
+ */
+
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/pinctrl/machine.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinmux.h>
+#include <linux/pinctrl/pinconf.h>
+#include <linux/pinctrl/pinconf-generic.h>
+#include <linux/slab.h>
+#include <linux/gpio/driver.h>
+#include <linux/interrupt.h>
+#include <linux/spinlock.h>
+#include <linux/reboot.h>
+#include <linux/pm.h>
+#include <linux/log2.h>
+#include <linux/qcom_scm.h>
+
+#include <linux/soc/qcom/irq.h>
+
+#include "../core.h"
+#include "../pinconf.h"
+#include "pinctrl-msm.h"
+#include "../pinctrl-utils.h"
+
+#define MAX_NR_GPIO 300
+#define MAX_NR_TILES 4
+#define PS_HOLD_OFFSET 0x820
+
+/**
+ * struct msm_pinctrl - state for a pinctrl-msm device
+ * @dev:            device handle.
+ * @pctrl:          pinctrl handle.
+ * @chip:           gpiochip handle.
+ * @desc:           pin controller descriptor
+ * @restart_nb:     restart notifier block.
+ * @irq_chip:       irq chip information
+ * @irq:            parent irq for the TLMM irq_chip.
+ * @intr_target_use_scm: route irq to application cpu using scm calls
+ * @lock:           Spinlock to protect register resources as well
+ *                  as msm_pinctrl data structures.
+ * @enabled_irqs:   Bitmap of currently enabled irqs.
+ * @dual_edge_irqs: Bitmap of irqs that need sw emulated dual edge
+ *                  detection.
+ * @skip_wake_irqs: Skip IRQs that are handled by wakeup interrupt controller
+ * @disabled_for_mux: These IRQs were disabled because we muxed away.
+ * @soc:            Reference to soc_data of platform specific data.
+ * @regs:           Base addresses for the TLMM tiles.
+ * @phys_base:      Physical base address
+ */
+struct msm_pinctrl {
+	struct device *dev;
+	struct pinctrl_dev *pctrl;
+	struct gpio_chip chip;
+	struct pinctrl_desc desc;
+	struct notifier_block restart_nb;
+
+	struct irq_chip irq_chip;
+	int irq;
+
+	bool intr_target_use_scm;
+
+	raw_spinlock_t lock;
+
+	DECLARE_BITMAP(dual_edge_irqs, MAX_NR_GPIO);
+	DECLARE_BITMAP(enabled_irqs, MAX_NR_GPIO);
+	DECLARE_BITMAP(skip_wake_irqs, MAX_NR_GPIO);
+	DECLARE_BITMAP(disabled_for_mux, MAX_NR_GPIO);
+
+	const struct msm_pinctrl_soc_data *soc;
+	void __iomem *regs[MAX_NR_TILES];
+	u32 phys_base[MAX_NR_TILES];
+};
+
+#define MSM_ACCESSOR(name) \
+static u32 msm_readl_##name(struct msm_pinctrl *pctrl, \
+			    const struct msm_pingroup *g) \
+{ \
+	return readl(pctrl->regs[g->tile] + g->name##_reg); \
+} \
+static void msm_writel_##name(u32 val, struct msm_pinctrl *pctrl, \
+			      const struct msm_pingroup *g) \
+{ \
+	writel(val, pctrl->regs[g->tile] + g->name##_reg); \
+}
+
+MSM_ACCESSOR(ctl)
+MSM_ACCESSOR(io)
+MSM_ACCESSOR(intr_cfg)
+MSM_ACCESSOR(intr_status)
+MSM_ACCESSOR(intr_target)
+
+static void msm_ack_intr_status(struct msm_pinctrl *pctrl,
+				const struct msm_pingroup *g)
+{
+	u32 val = g->intr_ack_high ? BIT(g->intr_status_bit) : 0;
+
+	msm_writel_intr_status(val, pctrl, g);
+}
+
+static int msm_get_groups_count(struct pinctrl_dev *pctldev)
+{
+	struct msm_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
+
+	return pctrl->soc->ngroups;
+}
+
+static const char *msm_get_group_name(struct pinctrl_dev *pctldev,
+				      unsigned group)
+{
+	struct msm_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
+
+	return pctrl->soc->groups[group].name;
+}
+
+static int msm_get_group_pins(struct pinctrl_dev *pctldev,
+			      unsigned group,
+			      const unsigned **pins,
+			      unsigned *num_pins)
+{
+	struct msm_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
+
+	*pins = pctrl->soc->groups[group].pins;
+	*num_pins = pctrl->soc->groups[group].npins;
+	return 0;
+}
+
+static const struct pinctrl_ops msm_pinctrl_ops = {
+	.get_groups_count	= msm_get_groups_count,
+	.get_group_name		= msm_get_group_name,
+	.get_group_pins		= msm_get_group_pins,
+	.dt_node_to_map		= pinconf_generic_dt_node_to_map_group,
+	.dt_free_map		= pinctrl_utils_free_map,
+};
+
+static int msm_pinmux_request(struct pinctrl_dev *pctldev, unsigned offset)
+{
+	struct msm_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
+	struct gpio_chip *chip = &pctrl->chip;
+
+	return gpiochip_line_is_valid(chip, offset) ? 0 : -EINVAL;
+}
+
+static int msm_get_functions_count(struct pinctrl_dev *pctldev)
+{
+	struct msm_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
+
+	return pctrl->soc->nfunctions;
+}
+
+static const char *msm_get_function_name(struct pinctrl_dev *pctldev,
+					 unsigned function)
+{
+	struct msm_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
+
+	return pctrl->soc->functions[function].name;
+}
+
+static int msm_get_function_groups(struct pinctrl_dev *pctldev,
+				   unsigned function,
+				   const char * const **groups,
+				   unsigned * const num_groups)
+{
+	struct msm_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
+
+	*groups = pctrl->soc->functions[function].groups;
+	*num_groups = pctrl->soc->functions[function].ngroups;
+	return 0;
+}
+
+static int msm_pinmux_set_mux(struct pinctrl_dev *pctldev,
+			      unsigned function,
+			      unsigned group)
+{
+	struct msm_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
+	struct gpio_chip *gc = &pctrl->chip;
+	unsigned int irq = irq_find_mapping(gc->irq.domain, group);
+	struct irq_data *d = irq_get_irq_data(irq);
+	unsigned int gpio_func = pctrl->soc->gpio_func;
+	const struct msm_pingroup *g;
+	unsigned long flags;
+	u32 val, mask;
+	int i;
+
+	g = &pctrl->soc->groups[group];
+	mask = GENMASK(g->mux_bit + order_base_2(g->nfuncs) - 1, g->mux_bit);
+
+	for (i = 0; i < g->nfuncs; i++) {
+		if (g->funcs[i] == function)
+			break;
+	}
+
+	if (WARN_ON(i == g->nfuncs))
+		return -EINVAL;
+
+	/*
+	 * If an GPIO interrupt is setup on this pin then we need special
+	 * handling.  Specifically interrupt detection logic will still see
+	 * the pin twiddle even when we're muxed away.
+	 *
+	 * When we see a pin with an interrupt setup on it then we'll disable
+	 * (mask) interrupts on it when we mux away until we mux back.  Note
+	 * that disable_irq() refcounts and interrupts are disabled as long as
+	 * at least one disable_irq() has been called.
+	 */
+	if (d && i != gpio_func &&
+	    !test_and_set_bit(d->hwirq, pctrl->disabled_for_mux))
+		disable_irq(irq);
+
+	raw_spin_lock_irqsave(&pctrl->lock, flags);
+
+	val = msm_readl_ctl(pctrl, g);
+	val &= ~mask;
+	val |= i << g->mux_bit;
+	msm_writel_ctl(val, pctrl, g);
+
+	raw_spin_unlock_irqrestore(&pctrl->lock, flags);
+
+	if (d && i == gpio_func &&
+	    test_and_clear_bit(d->hwirq, pctrl->disabled_for_mux)) {
+		/*
+		 * Clear interrupts detected while not GPIO since we only
+		 * masked things.
+		 */
+		if (d->parent_data && test_bit(d->hwirq, pctrl->skip_wake_irqs))
+			irq_chip_set_parent_state(d, IRQCHIP_STATE_PENDING, false);
+		else
+			msm_ack_intr_status(pctrl, g);
+
+		enable_irq(irq);
+	}
+
+	return 0;
+}
+
+static int msm_pinmux_request_gpio(struct pinctrl_dev *pctldev,
+				   struct pinctrl_gpio_range *range,
+				   unsigned offset)
+{
+	struct msm_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
+	const struct msm_pingroup *g = &pctrl->soc->groups[offset];
+
+	/* No funcs? Probably ACPI so can't do anything here */
+	if (!g->nfuncs)
+		return 0;
+
+	return msm_pinmux_set_mux(pctldev, g->funcs[pctrl->soc->gpio_func], offset);
+}
+
+static const struct pinmux_ops msm_pinmux_ops = {
+	.request		= msm_pinmux_request,
+	.get_functions_count	= msm_get_functions_count,
+	.get_function_name	= msm_get_function_name,
+	.get_function_groups	= msm_get_function_groups,
+	.gpio_request_enable	= msm_pinmux_request_gpio,
+	.set_mux		= msm_pinmux_set_mux,
+};
+
+static int msm_config_reg(struct msm_pinctrl *pctrl,
+			  const struct msm_pingroup *g,
+			  unsigned param,
+			  unsigned *mask,
+			  unsigned *bit)
+{
+	switch (param) {
+	case PIN_CONFIG_BIAS_DISABLE:
+	case PIN_CONFIG_BIAS_PULL_DOWN:
+	case PIN_CONFIG_BIAS_BUS_HOLD:
+	case PIN_CONFIG_BIAS_PULL_UP:
+		*bit = g->pull_bit;
+		*mask = 3;
+		break;
+	case PIN_CONFIG_DRIVE_OPEN_DRAIN:
+		*bit = g->od_bit;
+		*mask = 1;
+		break;
+	case PIN_CONFIG_DRIVE_STRENGTH:
+		*bit = g->drv_bit;
+		*mask = 7;
+		break;
+	case PIN_CONFIG_OUTPUT:
+	case PIN_CONFIG_INPUT_ENABLE:
+		*bit = g->oe_bit;
+		*mask = 1;
+		break;
+	default:
+		return -ENOTSUPP;
+	}
+
+	return 0;
+}
+
+#define MSM_NO_PULL		0
+#define MSM_PULL_DOWN		1
+#define MSM_KEEPER		2
+#define MSM_PULL_UP_NO_KEEPER	2
+#define MSM_PULL_UP		3
+
+static unsigned msm_regval_to_drive(u32 val)
+{
+	return (val + 1) * 2;
+}
+
+static int msm_config_group_get(struct pinctrl_dev *pctldev,
+				unsigned int group,
+				unsigned long *config)
+{
+	const struct msm_pingroup *g;
+	struct msm_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
+	unsigned param = pinconf_to_config_param(*config);
+	unsigned mask;
+	unsigned arg;
+	unsigned bit;
+	int ret;
+	u32 val;
+
+	g = &pctrl->soc->groups[group];
+
+	ret = msm_config_reg(pctrl, g, param, &mask, &bit);
+	if (ret < 0)
+		return ret;
+
+	val = msm_readl_ctl(pctrl, g);
+	arg = (val >> bit) & mask;
+
+	/* Convert register value to pinconf value */
+	switch (param) {
+	case PIN_CONFIG_BIAS_DISABLE:
+		if (arg != MSM_NO_PULL)
+			return -EINVAL;
+		arg = 1;
+		break;
+	case PIN_CONFIG_BIAS_PULL_DOWN:
+		if (arg != MSM_PULL_DOWN)
+			return -EINVAL;
+		arg = 1;
+		break;
+	case PIN_CONFIG_BIAS_BUS_HOLD:
+		if (pctrl->soc->pull_no_keeper)
+			return -ENOTSUPP;
+
+		if (arg != MSM_KEEPER)
+			return -EINVAL;
+		arg = 1;
+		break;
+	case PIN_CONFIG_BIAS_PULL_UP:
+		if (pctrl->soc->pull_no_keeper)
+			arg = arg == MSM_PULL_UP_NO_KEEPER;
+		else
+			arg = arg == MSM_PULL_UP;
+		if (!arg)
+			return -EINVAL;
+		break;
+	case PIN_CONFIG_DRIVE_OPEN_DRAIN:
+		/* Pin is not open-drain */
+		if (!arg)
+			return -EINVAL;
+		arg = 1;
+		break;
+	case PIN_CONFIG_DRIVE_STRENGTH:
+		arg = msm_regval_to_drive(arg);
+		break;
+	case PIN_CONFIG_OUTPUT:
+		/* Pin is not output */
+		if (!arg)
+			return -EINVAL;
+
+		val = msm_readl_io(pctrl, g);
+		arg = !!(val & BIT(g->in_bit));
+		break;
+	case PIN_CONFIG_INPUT_ENABLE:
+		/* Pin is output */
+		if (arg)
+			return -EINVAL;
+		arg = 1;
+		break;
+	default:
+		return -ENOTSUPP;
+	}
+
+	*config = pinconf_to_config_packed(param, arg);
+
+	return 0;
+}
+
+static int msm_config_group_set(struct pinctrl_dev *pctldev,
+				unsigned group,
+				unsigned long *configs,
+				unsigned num_configs)
+{
+	const struct msm_pingroup *g;
+	struct msm_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
+	unsigned long flags;
+	unsigned param;
+	unsigned mask;
+	unsigned arg;
+	unsigned bit;
+	int ret;
+	u32 val;
+	int i;
+
+	g = &pctrl->soc->groups[group];
+
+	for (i = 0; i < num_configs; i++) {
+		param = pinconf_to_config_param(configs[i]);
+		arg = pinconf_to_config_argument(configs[i]);
+
+		ret = msm_config_reg(pctrl, g, param, &mask, &bit);
+		if (ret < 0)
+			return ret;
+
+		/* Convert pinconf values to register values */
+		switch (param) {
+		case PIN_CONFIG_BIAS_DISABLE:
+			arg = MSM_NO_PULL;
+			break;
+		case PIN_CONFIG_BIAS_PULL_DOWN:
+			arg = MSM_PULL_DOWN;
+			break;
+		case PIN_CONFIG_BIAS_BUS_HOLD:
+			if (pctrl->soc->pull_no_keeper)
+				return -ENOTSUPP;
+
+			arg = MSM_KEEPER;
+			break;
+		case PIN_CONFIG_BIAS_PULL_UP:
+			if (pctrl->soc->pull_no_keeper)
+				arg = MSM_PULL_UP_NO_KEEPER;
+			else
+				arg = MSM_PULL_UP;
+			break;
+		case PIN_CONFIG_DRIVE_OPEN_DRAIN:
+			arg = 1;
+			break;
+		case PIN_CONFIG_DRIVE_STRENGTH:
+			/* Check for invalid values */
+			if (arg > 16 || arg < 2 || (arg % 2) != 0)
+				arg = -1;
+			else
+				arg = (arg / 2) - 1;
+			break;
+		case PIN_CONFIG_OUTPUT:
+			/* set output value */
+			raw_spin_lock_irqsave(&pctrl->lock, flags);
+			val = msm_readl_io(pctrl, g);
+			if (arg)
+				val |= BIT(g->out_bit);
+			else
+				val &= ~BIT(g->out_bit);
+			msm_writel_io(val, pctrl, g);
+			raw_spin_unlock_irqrestore(&pctrl->lock, flags);
+
+			/* enable output */
+			arg = 1;
+			break;
+		case PIN_CONFIG_INPUT_ENABLE:
+			/* disable output */
+			arg = 0;
+			break;
+		default:
+			dev_err(pctrl->dev, "Unsupported config parameter: %x\n",
+				param);
+			return -EINVAL;
+		}
+
+		/* Range-check user-supplied value */
+		if (arg & ~mask) {
+			dev_err(pctrl->dev, "config %x: %x is invalid\n", param, arg);
+			return -EINVAL;
+		}
+
+		raw_spin_lock_irqsave(&pctrl->lock, flags);
+		val = msm_readl_ctl(pctrl, g);
+		val &= ~(mask << bit);
+		val |= arg << bit;
+		msm_writel_ctl(val, pctrl, g);
+		raw_spin_unlock_irqrestore(&pctrl->lock, flags);
+	}
+
+	return 0;
+}
+
+static const struct pinconf_ops msm_pinconf_ops = {
+	.is_generic		= true,
+	.pin_config_group_get	= msm_config_group_get,
+	.pin_config_group_set	= msm_config_group_set,
+};
+
+static int msm_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
+{
+	const struct msm_pingroup *g;
+	struct msm_pinctrl *pctrl = gpiochip_get_data(chip);
+	unsigned long flags;
+	u32 val;
+
+	g = &pctrl->soc->groups[offset];
+
+	raw_spin_lock_irqsave(&pctrl->lock, flags);
+
+	val = msm_readl_ctl(pctrl, g);
+	val &= ~BIT(g->oe_bit);
+	msm_writel_ctl(val, pctrl, g);
+
+	raw_spin_unlock_irqrestore(&pctrl->lock, flags);
+
+	return 0;
+}
+
+static int msm_gpio_direction_output(struct gpio_chip *chip, unsigned offset, int value)
+{
+	const struct msm_pingroup *g;
+	struct msm_pinctrl *pctrl = gpiochip_get_data(chip);
+	unsigned long flags;
+	u32 val;
+
+	g = &pctrl->soc->groups[offset];
+
+	raw_spin_lock_irqsave(&pctrl->lock, flags);
+
+	val = msm_readl_io(pctrl, g);
+	if (value)
+		val |= BIT(g->out_bit);
+	else
+		val &= ~BIT(g->out_bit);
+	msm_writel_io(val, pctrl, g);
+
+	val = msm_readl_ctl(pctrl, g);
+	val |= BIT(g->oe_bit);
+	msm_writel_ctl(val, pctrl, g);
+
+	raw_spin_unlock_irqrestore(&pctrl->lock, flags);
+
+	return 0;
+}
+
+static int msm_gpio_get_direction(struct gpio_chip *chip, unsigned int offset)
+{
+	struct msm_pinctrl *pctrl = gpiochip_get_data(chip);
+	const struct msm_pingroup *g;
+	u32 val;
+
+	g = &pctrl->soc->groups[offset];
+
+	val = msm_readl_ctl(pctrl, g);
+
+	return val & BIT(g->oe_bit) ? GPIO_LINE_DIRECTION_OUT :
+				      GPIO_LINE_DIRECTION_IN;
+}
+
+static int msm_gpio_get(struct gpio_chip *chip, unsigned offset)
+{
+	const struct msm_pingroup *g;
+	struct msm_pinctrl *pctrl = gpiochip_get_data(chip);
+	u32 val;
+
+	g = &pctrl->soc->groups[offset];
+
+	val = msm_readl_io(pctrl, g);
+	return !!(val & BIT(g->in_bit));
+}
+
+static void msm_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
+{
+	const struct msm_pingroup *g;
+	struct msm_pinctrl *pctrl = gpiochip_get_data(chip);
+	unsigned long flags;
+	u32 val;
+
+	g = &pctrl->soc->groups[offset];
+
+	raw_spin_lock_irqsave(&pctrl->lock, flags);
+
+	val = msm_readl_io(pctrl, g);
+	if (value)
+		val |= BIT(g->out_bit);
+	else
+		val &= ~BIT(g->out_bit);
+	msm_writel_io(val, pctrl, g);
+
+	raw_spin_unlock_irqrestore(&pctrl->lock, flags);
+}
+
+#ifdef CONFIG_DEBUG_FS
+#include <linux/seq_file.h>
+
+static void msm_gpio_dbg_show_one(struct seq_file *s,
+				  struct pinctrl_dev *pctldev,
+				  struct gpio_chip *chip,
+				  unsigned offset,
+				  unsigned gpio)
+{
+	const struct msm_pingroup *g;
+	struct msm_pinctrl *pctrl = gpiochip_get_data(chip);
+	unsigned func;
+	int is_out;
+	int drive;
+	int pull;
+	int val;
+	u32 ctl_reg, io_reg;
+
+	static const char * const pulls_keeper[] = {
+		"no pull",
+		"pull down",
+		"keeper",
+		"pull up"
+	};
+
+	static const char * const pulls_no_keeper[] = {
+		"no pull",
+		"pull down",
+		"pull up",
+	};
+
+	if (!gpiochip_line_is_valid(chip, offset))
+		return;
+
+	g = &pctrl->soc->groups[offset];
+	ctl_reg = msm_readl_ctl(pctrl, g);
+	io_reg = msm_readl_io(pctrl, g);
+
+	is_out = !!(ctl_reg & BIT(g->oe_bit));
+	func = (ctl_reg >> g->mux_bit) & 7;
+	drive = (ctl_reg >> g->drv_bit) & 7;
+	pull = (ctl_reg >> g->pull_bit) & 3;
+
+	if (is_out)
+		val = !!(io_reg & BIT(g->out_bit));
+	else
+		val = !!(io_reg & BIT(g->in_bit));
+
+	seq_printf(s, " %-8s: %-3s", g->name, is_out ? "out" : "in");
+	seq_printf(s, " %-4s func%d", val ? "high" : "low", func);
+	seq_printf(s, " %dmA", msm_regval_to_drive(drive));
+	if (pctrl->soc->pull_no_keeper)
+		seq_printf(s, " %s", pulls_no_keeper[pull]);
+	else
+		seq_printf(s, " %s", pulls_keeper[pull]);
+	seq_puts(s, "\n");
+}
+
+static void msm_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
+{
+	unsigned gpio = chip->base;
+	unsigned i;
+
+	for (i = 0; i < chip->ngpio; i++, gpio++)
+		msm_gpio_dbg_show_one(s, NULL, chip, i, gpio);
+}
+
+#else
+#define msm_gpio_dbg_show NULL
+#endif
+
+static int msm_gpio_init_valid_mask(struct gpio_chip *gc,
+				    unsigned long *valid_mask,
+				    unsigned int ngpios)
+{
+	struct msm_pinctrl *pctrl = gpiochip_get_data(gc);
+	int ret;
+	unsigned int len, i;
+	const int *reserved = pctrl->soc->reserved_gpios;
+	u16 *tmp;
+
+	/* Driver provided reserved list overrides DT and ACPI */
+	if (reserved) {
+		bitmap_fill(valid_mask, ngpios);
+		for (i = 0; reserved[i] >= 0; i++) {
+			if (i >= ngpios || reserved[i] >= ngpios) {
+				dev_err(pctrl->dev, "invalid list of reserved GPIOs\n");
+				return -EINVAL;
+			}
+			clear_bit(reserved[i], valid_mask);
+		}
+
+		return 0;
+	}
+
+	/* The number of GPIOs in the ACPI tables */
+	len = ret = device_property_count_u16(pctrl->dev, "gpios");
+	if (ret < 0)
+		return 0;
+
+	if (ret > ngpios)
+		return -EINVAL;
+
+	tmp = kmalloc_array(len, sizeof(*tmp), GFP_KERNEL);
+	if (!tmp)
+		return -ENOMEM;
+
+	ret = device_property_read_u16_array(pctrl->dev, "gpios", tmp, len);
+	if (ret < 0) {
+		dev_err(pctrl->dev, "could not read list of GPIOs\n");
+		goto out;
+	}
+
+	bitmap_zero(valid_mask, ngpios);
+	for (i = 0; i < len; i++)
+		set_bit(tmp[i], valid_mask);
+
+out:
+	kfree(tmp);
+	return ret;
+}
+
+static const struct gpio_chip msm_gpio_template = {
+	.direction_input  = msm_gpio_direction_input,
+	.direction_output = msm_gpio_direction_output,
+	.get_direction    = msm_gpio_get_direction,
+	.get              = msm_gpio_get,
+	.set              = msm_gpio_set,
+	.request          = gpiochip_generic_request,
+	.free             = gpiochip_generic_free,
+	.dbg_show         = msm_gpio_dbg_show,
+};
+
+/* For dual-edge interrupts in software, since some hardware has no
+ * such support:
+ *
+ * At appropriate moments, this function may be called to flip the polarity
+ * settings of both-edge irq lines to try and catch the next edge.
+ *
+ * The attempt is considered successful if:
+ * - the status bit goes high, indicating that an edge was caught, or
+ * - the input value of the gpio doesn't change during the attempt.
+ * If the value changes twice during the process, that would cause the first
+ * test to fail but would force the second, as two opposite
+ * transitions would cause a detection no matter the polarity setting.
+ *
+ * The do-loop tries to sledge-hammer closed the timing hole between
+ * the initial value-read and the polarity-write - if the line value changes
+ * during that window, an interrupt is lost, the new polarity setting is
+ * incorrect, and the first success test will fail, causing a retry.
+ *
+ * Algorithm comes from Google's msmgpio driver.
+ */
+static void msm_gpio_update_dual_edge_pos(struct msm_pinctrl *pctrl,
+					  const struct msm_pingroup *g,
+					  struct irq_data *d)
+{
+	int loop_limit = 100;
+	unsigned val, val2, intstat;
+	unsigned pol;
+
+	do {
+		val = msm_readl_io(pctrl, g) & BIT(g->in_bit);
+
+		pol = msm_readl_intr_cfg(pctrl, g);
+		pol ^= BIT(g->intr_polarity_bit);
+		msm_writel_intr_cfg(pol, pctrl, g);
+
+		val2 = msm_readl_io(pctrl, g) & BIT(g->in_bit);
+		intstat = msm_readl_intr_status(pctrl, g);
+		if (intstat || (val == val2))
+			return;
+	} while (loop_limit-- > 0);
+	dev_err(pctrl->dev, "dual-edge irq failed to stabilize, %#08x != %#08x\n",
+		val, val2);
+}
+
+static void msm_gpio_irq_mask(struct irq_data *d)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct msm_pinctrl *pctrl = gpiochip_get_data(gc);
+	const struct msm_pingroup *g;
+	unsigned long flags;
+	u32 val;
+
+	if (d->parent_data)
+		irq_chip_mask_parent(d);
+
+	if (test_bit(d->hwirq, pctrl->skip_wake_irqs))
+		return;
+
+	g = &pctrl->soc->groups[d->hwirq];
+
+	raw_spin_lock_irqsave(&pctrl->lock, flags);
+
+	val = msm_readl_intr_cfg(pctrl, g);
+	/*
+	 * There are two bits that control interrupt forwarding to the CPU. The
+	 * RAW_STATUS_EN bit causes the level or edge sensed on the line to be
+	 * latched into the interrupt status register when the hardware detects
+	 * an irq that it's configured for (either edge for edge type or level
+	 * for level type irq). The 'non-raw' status enable bit causes the
+	 * hardware to assert the summary interrupt to the CPU if the latched
+	 * status bit is set. There's a bug though, the edge detection logic
+	 * seems to have a problem where toggling the RAW_STATUS_EN bit may
+	 * cause the status bit to latch spuriously when there isn't any edge
+	 * so we can't touch that bit for edge type irqs and we have to keep
+	 * the bit set anyway so that edges are latched while the line is masked.
+	 *
+	 * To make matters more complicated, leaving the RAW_STATUS_EN bit
+	 * enabled all the time causes level interrupts to re-latch into the
+	 * status register because the level is still present on the line after
+	 * we ack it. We clear the raw status enable bit during mask here and
+	 * set the bit on unmask so the interrupt can't latch into the hardware
+	 * while it's masked.
+	 */
+	if (irqd_get_trigger_type(d) & IRQ_TYPE_LEVEL_MASK)
+		val &= ~BIT(g->intr_raw_status_bit);
+
+	val &= ~BIT(g->intr_enable_bit);
+	msm_writel_intr_cfg(val, pctrl, g);
+
+	clear_bit(d->hwirq, pctrl->enabled_irqs);
+
+	raw_spin_unlock_irqrestore(&pctrl->lock, flags);
+}
+
+static void msm_gpio_irq_unmask(struct irq_data *d)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct msm_pinctrl *pctrl = gpiochip_get_data(gc);
+	const struct msm_pingroup *g;
+	unsigned long flags;
+	u32 val;
+
+	if (d->parent_data)
+		irq_chip_unmask_parent(d);
+
+	if (test_bit(d->hwirq, pctrl->skip_wake_irqs))
+		return;
+
+	g = &pctrl->soc->groups[d->hwirq];
+
+	raw_spin_lock_irqsave(&pctrl->lock, flags);
+
+	val = msm_readl_intr_cfg(pctrl, g);
+	val |= BIT(g->intr_raw_status_bit);
+	val |= BIT(g->intr_enable_bit);
+	msm_writel_intr_cfg(val, pctrl, g);
+
+	set_bit(d->hwirq, pctrl->enabled_irqs);
+
+	raw_spin_unlock_irqrestore(&pctrl->lock, flags);
+}
+
+static void msm_gpio_irq_enable(struct irq_data *d)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct msm_pinctrl *pctrl = gpiochip_get_data(gc);
+
+	if (d->parent_data)
+		irq_chip_enable_parent(d);
+
+	if (!test_bit(d->hwirq, pctrl->skip_wake_irqs))
+		msm_gpio_irq_unmask(d);
+}
+
+static void msm_gpio_irq_disable(struct irq_data *d)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct msm_pinctrl *pctrl = gpiochip_get_data(gc);
+
+	if (d->parent_data)
+		irq_chip_disable_parent(d);
+
+	if (!test_bit(d->hwirq, pctrl->skip_wake_irqs))
+		msm_gpio_irq_mask(d);
+}
+
+/**
+ * msm_gpio_update_dual_edge_parent() - Prime next edge for IRQs handled by parent.
+ * @d: The irq dta.
+ *
+ * This is much like msm_gpio_update_dual_edge_pos() but for IRQs that are
+ * normally handled by the parent irqchip.  The logic here is slightly
+ * different due to what's easy to do with our parent, but in principle it's
+ * the same.
+ */
+static void msm_gpio_update_dual_edge_parent(struct irq_data *d)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct msm_pinctrl *pctrl = gpiochip_get_data(gc);
+	const struct msm_pingroup *g = &pctrl->soc->groups[d->hwirq];
+	int loop_limit = 100;
+	unsigned int val;
+	unsigned int type;
+
+	/* Read the value and make a guess about what edge we need to catch */
+	val = msm_readl_io(pctrl, g) & BIT(g->in_bit);
+	type = val ? IRQ_TYPE_EDGE_FALLING : IRQ_TYPE_EDGE_RISING;
+
+	do {
+		/* Set the parent to catch the next edge */
+		irq_chip_set_type_parent(d, type);
+
+		/*
+		 * Possibly the line changed between when we last read "val"
+		 * (and decided what edge we needed) and when set the edge.
+		 * If the value didn't change (or changed and then changed
+		 * back) then we're done.
+		 */
+		val = msm_readl_io(pctrl, g) & BIT(g->in_bit);
+		if (type == IRQ_TYPE_EDGE_RISING) {
+			if (!val)
+				return;
+			type = IRQ_TYPE_EDGE_FALLING;
+		} else if (type == IRQ_TYPE_EDGE_FALLING) {
+			if (val)
+				return;
+			type = IRQ_TYPE_EDGE_RISING;
+		}
+	} while (loop_limit-- > 0);
+	dev_warn_once(pctrl->dev, "dual-edge irq failed to stabilize\n");
+}
+
+static void msm_gpio_irq_ack(struct irq_data *d)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct msm_pinctrl *pctrl = gpiochip_get_data(gc);
+	const struct msm_pingroup *g;
+	unsigned long flags;
+
+	if (test_bit(d->hwirq, pctrl->skip_wake_irqs)) {
+		if (test_bit(d->hwirq, pctrl->dual_edge_irqs))
+			msm_gpio_update_dual_edge_parent(d);
+		return;
+	}
+
+	g = &pctrl->soc->groups[d->hwirq];
+
+	raw_spin_lock_irqsave(&pctrl->lock, flags);
+
+	msm_ack_intr_status(pctrl, g);
+
+	if (test_bit(d->hwirq, pctrl->dual_edge_irqs))
+		msm_gpio_update_dual_edge_pos(pctrl, g, d);
+
+	raw_spin_unlock_irqrestore(&pctrl->lock, flags);
+}
+
+static bool msm_gpio_needs_dual_edge_parent_workaround(struct irq_data *d,
+						       unsigned int type)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct msm_pinctrl *pctrl = gpiochip_get_data(gc);
+
+	return type == IRQ_TYPE_EDGE_BOTH &&
+	       pctrl->soc->wakeirq_dual_edge_errata && d->parent_data &&
+	       test_bit(d->hwirq, pctrl->skip_wake_irqs);
+}
+
+static int msm_gpio_irq_set_type(struct irq_data *d, unsigned int type)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct msm_pinctrl *pctrl = gpiochip_get_data(gc);
+	const struct msm_pingroup *g;
+	unsigned long flags;
+	bool was_enabled;
+	u32 val;
+
+	if (msm_gpio_needs_dual_edge_parent_workaround(d, type)) {
+		set_bit(d->hwirq, pctrl->dual_edge_irqs);
+		irq_set_handler_locked(d, handle_fasteoi_ack_irq);
+		msm_gpio_update_dual_edge_parent(d);
+		return 0;
+	}
+
+	if (d->parent_data)
+		irq_chip_set_type_parent(d, type);
+
+	if (test_bit(d->hwirq, pctrl->skip_wake_irqs)) {
+		clear_bit(d->hwirq, pctrl->dual_edge_irqs);
+		irq_set_handler_locked(d, handle_fasteoi_irq);
+		return 0;
+	}
+
+	g = &pctrl->soc->groups[d->hwirq];
+
+	raw_spin_lock_irqsave(&pctrl->lock, flags);
+
+	/*
+	 * For hw without possibility of detecting both edges
+	 */
+	if (g->intr_detection_width == 1 && type == IRQ_TYPE_EDGE_BOTH)
+		set_bit(d->hwirq, pctrl->dual_edge_irqs);
+	else
+		clear_bit(d->hwirq, pctrl->dual_edge_irqs);
+
+	/* Route interrupts to application cpu.
+	 * With intr_target_use_scm interrupts are routed to
+	 * application cpu using scm calls.
+	 */
+	if (pctrl->intr_target_use_scm) {
+		u32 addr = pctrl->phys_base[0] + g->intr_target_reg;
+		int ret;
+
+		qcom_scm_io_readl(addr, &val);
+
+		val &= ~(7 << g->intr_target_bit);
+		val |= g->intr_target_kpss_val << g->intr_target_bit;
+
+		ret = qcom_scm_io_writel(addr, val);
+		if (ret)
+			dev_err(pctrl->dev,
+				"Failed routing %lu interrupt to Apps proc",
+				d->hwirq);
+	} else {
+		val = msm_readl_intr_target(pctrl, g);
+		val &= ~(7 << g->intr_target_bit);
+		val |= g->intr_target_kpss_val << g->intr_target_bit;
+		msm_writel_intr_target(val, pctrl, g);
+	}
+
+	/* Update configuration for gpio.
+	 * RAW_STATUS_EN is left on for all gpio irqs. Due to the
+	 * internal circuitry of TLMM, toggling the RAW_STATUS
+	 * could cause the INTR_STATUS to be set for EDGE interrupts.
+	 */
+	val = msm_readl_intr_cfg(pctrl, g);
+	was_enabled = val & BIT(g->intr_raw_status_bit);
+	val |= BIT(g->intr_raw_status_bit);
+	if (g->intr_detection_width == 2) {
+		val &= ~(3 << g->intr_detection_bit);
+		val &= ~(1 << g->intr_polarity_bit);
+		switch (type) {
+		case IRQ_TYPE_EDGE_RISING:
+			val |= 1 << g->intr_detection_bit;
+			val |= BIT(g->intr_polarity_bit);
+			break;
+		case IRQ_TYPE_EDGE_FALLING:
+			val |= 2 << g->intr_detection_bit;
+			val |= BIT(g->intr_polarity_bit);
+			break;
+		case IRQ_TYPE_EDGE_BOTH:
+			val |= 3 << g->intr_detection_bit;
+			val |= BIT(g->intr_polarity_bit);
+			break;
+		case IRQ_TYPE_LEVEL_LOW:
+			break;
+		case IRQ_TYPE_LEVEL_HIGH:
+			val |= BIT(g->intr_polarity_bit);
+			break;
+		}
+	} else if (g->intr_detection_width == 1) {
+		val &= ~(1 << g->intr_detection_bit);
+		val &= ~(1 << g->intr_polarity_bit);
+		switch (type) {
+		case IRQ_TYPE_EDGE_RISING:
+			val |= BIT(g->intr_detection_bit);
+			val |= BIT(g->intr_polarity_bit);
+			break;
+		case IRQ_TYPE_EDGE_FALLING:
+			val |= BIT(g->intr_detection_bit);
+			break;
+		case IRQ_TYPE_EDGE_BOTH:
+			val |= BIT(g->intr_detection_bit);
+			val |= BIT(g->intr_polarity_bit);
+			break;
+		case IRQ_TYPE_LEVEL_LOW:
+			break;
+		case IRQ_TYPE_LEVEL_HIGH:
+			val |= BIT(g->intr_polarity_bit);
+			break;
+		}
+	} else {
+		BUG();
+	}
+	msm_writel_intr_cfg(val, pctrl, g);
+
+	/*
+	 * The first time we set RAW_STATUS_EN it could trigger an interrupt.
+	 * Clear the interrupt.  This is safe because we have
+	 * IRQCHIP_SET_TYPE_MASKED.
+	 */
+	if (!was_enabled)
+		msm_ack_intr_status(pctrl, g);
+
+	if (test_bit(d->hwirq, pctrl->dual_edge_irqs))
+		msm_gpio_update_dual_edge_pos(pctrl, g, d);
+
+	raw_spin_unlock_irqrestore(&pctrl->lock, flags);
+
+	if (type & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_LEVEL_HIGH))
+		irq_set_handler_locked(d, handle_level_irq);
+	else if (type & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING))
+		irq_set_handler_locked(d, handle_edge_irq);
+
+	return 0;
+}
+
+static int msm_gpio_irq_set_wake(struct irq_data *d, unsigned int on)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct msm_pinctrl *pctrl = gpiochip_get_data(gc);
+
+	/*
+	 * While they may not wake up when the TLMM is powered off,
+	 * some GPIOs would like to wakeup the system from suspend
+	 * when TLMM is powered on. To allow that, enable the GPIO
+	 * summary line to be wakeup capable at GIC.
+	 */
+	if (d->parent_data && test_bit(d->hwirq, pctrl->skip_wake_irqs))
+		return irq_chip_set_wake_parent(d, on);
+
+	return irq_set_irq_wake(pctrl->irq, on);
+}
+
+static int msm_gpio_irq_reqres(struct irq_data *d)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct msm_pinctrl *pctrl = gpiochip_get_data(gc);
+	int ret;
+
+	if (!try_module_get(gc->owner))
+		return -ENODEV;
+
+	ret = msm_pinmux_request_gpio(pctrl->pctrl, NULL, d->hwirq);
+	if (ret)
+		goto out;
+	msm_gpio_direction_input(gc, d->hwirq);
+
+	if (gpiochip_lock_as_irq(gc, d->hwirq)) {
+		dev_err(gc->parent,
+			"unable to lock HW IRQ %lu for IRQ\n",
+			d->hwirq);
+		ret = -EINVAL;
+		goto out;
+	}
+
+	/*
+	 * The disable / clear-enable workaround we do in msm_pinmux_set_mux()
+	 * only works if disable is not lazy since we only clear any bogus
+	 * interrupt in hardware. Explicitly mark the interrupt as UNLAZY.
+	 */
+	irq_set_status_flags(d->irq, IRQ_DISABLE_UNLAZY);
+
+	return 0;
+out:
+	module_put(gc->owner);
+	return ret;
+}
+
+static void msm_gpio_irq_relres(struct irq_data *d)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+
+	gpiochip_unlock_as_irq(gc, d->hwirq);
+	module_put(gc->owner);
+}
+
+static int msm_gpio_irq_set_affinity(struct irq_data *d,
+				const struct cpumask *dest, bool force)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct msm_pinctrl *pctrl = gpiochip_get_data(gc);
+
+	if (d->parent_data && test_bit(d->hwirq, pctrl->skip_wake_irqs))
+		return irq_chip_set_affinity_parent(d, dest, force);
+
+	return 0;
+}
+
+static int msm_gpio_irq_set_vcpu_affinity(struct irq_data *d, void *vcpu_info)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct msm_pinctrl *pctrl = gpiochip_get_data(gc);
+
+	if (d->parent_data && test_bit(d->hwirq, pctrl->skip_wake_irqs))
+		return irq_chip_set_vcpu_affinity_parent(d, vcpu_info);
+
+	return 0;
+}
+
+static void msm_gpio_irq_handler(struct irq_desc *desc)
+{
+	struct gpio_chip *gc = irq_desc_get_handler_data(desc);
+	const struct msm_pingroup *g;
+	struct msm_pinctrl *pctrl = gpiochip_get_data(gc);
+	struct irq_chip *chip = irq_desc_get_chip(desc);
+	int irq_pin;
+	int handled = 0;
+	u32 val;
+	int i;
+
+	chained_irq_enter(chip, desc);
+
+	/*
+	 * Each pin has it's own IRQ status register, so use
+	 * enabled_irq bitmap to limit the number of reads.
+	 */
+	for_each_set_bit(i, pctrl->enabled_irqs, pctrl->chip.ngpio) {
+		g = &pctrl->soc->groups[i];
+		val = msm_readl_intr_status(pctrl, g);
+		if (val & BIT(g->intr_status_bit)) {
+			irq_pin = irq_find_mapping(gc->irq.domain, i);
+			generic_handle_irq(irq_pin);
+			handled++;
+		}
+	}
+
+	/* No interrupts were flagged */
+	if (handled == 0)
+		handle_bad_irq(desc);
+
+	chained_irq_exit(chip, desc);
+}
+
+static int msm_gpio_wakeirq(struct gpio_chip *gc,
+			    unsigned int child,
+			    unsigned int child_type,
+			    unsigned int *parent,
+			    unsigned int *parent_type)
+{
+	struct msm_pinctrl *pctrl = gpiochip_get_data(gc);
+	const struct msm_gpio_wakeirq_map *map;
+	int i;
+
+	*parent = GPIO_NO_WAKE_IRQ;
+	*parent_type = IRQ_TYPE_EDGE_RISING;
+
+	for (i = 0; i < pctrl->soc->nwakeirq_map; i++) {
+		map = &pctrl->soc->wakeirq_map[i];
+		if (map->gpio == child) {
+			*parent = map->wakeirq;
+			break;
+		}
+	}
+
+	return 0;
+}
+
+static bool msm_gpio_needs_valid_mask(struct msm_pinctrl *pctrl)
+{
+	if (pctrl->soc->reserved_gpios)
+		return true;
+
+	return device_property_count_u16(pctrl->dev, "gpios") > 0;
+}
+
+static int msm_gpio_init(struct msm_pinctrl *pctrl)
+{
+	struct gpio_chip *chip;
+	struct gpio_irq_chip *girq;
+	int i, ret;
+	unsigned gpio, ngpio = pctrl->soc->ngpios;
+	struct device_node *np;
+	bool skip;
+
+	if (WARN_ON(ngpio > MAX_NR_GPIO))
+		return -EINVAL;
+
+	chip = &pctrl->chip;
+	chip->base = -1;
+	chip->ngpio = ngpio;
+	chip->label = dev_name(pctrl->dev);
+	chip->parent = pctrl->dev;
+	chip->owner = THIS_MODULE;
+	chip->of_node = pctrl->dev->of_node;
+	if (msm_gpio_needs_valid_mask(pctrl))
+		chip->init_valid_mask = msm_gpio_init_valid_mask;
+
+	pctrl->irq_chip.name = "msmgpio";
+	pctrl->irq_chip.irq_enable = msm_gpio_irq_enable;
+	pctrl->irq_chip.irq_disable = msm_gpio_irq_disable;
+	pctrl->irq_chip.irq_mask = msm_gpio_irq_mask;
+	pctrl->irq_chip.irq_unmask = msm_gpio_irq_unmask;
+	pctrl->irq_chip.irq_ack = msm_gpio_irq_ack;
+	pctrl->irq_chip.irq_set_type = msm_gpio_irq_set_type;
+	pctrl->irq_chip.irq_set_wake = msm_gpio_irq_set_wake;
+	pctrl->irq_chip.irq_request_resources = msm_gpio_irq_reqres;
+	pctrl->irq_chip.irq_release_resources = msm_gpio_irq_relres;
+	pctrl->irq_chip.irq_set_affinity = msm_gpio_irq_set_affinity;
+	pctrl->irq_chip.irq_set_vcpu_affinity = msm_gpio_irq_set_vcpu_affinity;
+	pctrl->irq_chip.flags = IRQCHIP_MASK_ON_SUSPEND |
+				IRQCHIP_SET_TYPE_MASKED |
+				IRQCHIP_ENABLE_WAKEUP_ON_SUSPEND;
+
+	np = of_parse_phandle(pctrl->dev->of_node, "wakeup-parent", 0);
+	if (np) {
+		chip->irq.parent_domain = irq_find_matching_host(np,
+						 DOMAIN_BUS_WAKEUP);
+		of_node_put(np);
+		if (!chip->irq.parent_domain)
+			return -EPROBE_DEFER;
+		chip->irq.child_to_parent_hwirq = msm_gpio_wakeirq;
+		pctrl->irq_chip.irq_eoi = irq_chip_eoi_parent;
+		/*
+		 * Let's skip handling the GPIOs, if the parent irqchip
+		 * is handling the direct connect IRQ of the GPIO.
+		 */
+		skip = irq_domain_qcom_handle_wakeup(chip->irq.parent_domain);
+		for (i = 0; skip && i < pctrl->soc->nwakeirq_map; i++) {
+			gpio = pctrl->soc->wakeirq_map[i].gpio;
+			set_bit(gpio, pctrl->skip_wake_irqs);
+		}
+	}
+
+	girq = &chip->irq;
+	girq->chip = &pctrl->irq_chip;
+	girq->parent_handler = msm_gpio_irq_handler;
+	girq->fwnode = pctrl->dev->fwnode;
+	girq->num_parents = 1;
+	girq->parents = devm_kcalloc(pctrl->dev, 1, sizeof(*girq->parents),
+				     GFP_KERNEL);
+	if (!girq->parents)
+		return -ENOMEM;
+	girq->default_type = IRQ_TYPE_NONE;
+	girq->handler = handle_bad_irq;
+	girq->parents[0] = pctrl->irq;
+
+	ret = gpiochip_add_data(&pctrl->chip, pctrl);
+	if (ret) {
+		dev_err(pctrl->dev, "Failed register gpiochip\n");
+		return ret;
+	}
+
+	/*
+	 * For DeviceTree-supported systems, the gpio core checks the
+	 * pinctrl's device node for the "gpio-ranges" property.
+	 * If it is present, it takes care of adding the pin ranges
+	 * for the driver. In this case the driver can skip ahead.
+	 *
+	 * In order to remain compatible with older, existing DeviceTree
+	 * files which don't set the "gpio-ranges" property or systems that
+	 * utilize ACPI the driver has to call gpiochip_add_pin_range().
+	 */
+	if (!of_property_read_bool(pctrl->dev->of_node, "gpio-ranges")) {
+		ret = gpiochip_add_pin_range(&pctrl->chip,
+			dev_name(pctrl->dev), 0, 0, chip->ngpio);
+		if (ret) {
+			dev_err(pctrl->dev, "Failed to add pin range\n");
+			gpiochip_remove(&pctrl->chip);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+static int msm_ps_hold_restart(struct notifier_block *nb, unsigned long action,
+			       void *data)
+{
+	struct msm_pinctrl *pctrl = container_of(nb, struct msm_pinctrl, restart_nb);
+
+	writel(0, pctrl->regs[0] + PS_HOLD_OFFSET);
+	mdelay(1000);
+	return NOTIFY_DONE;
+}
+
+static struct msm_pinctrl *poweroff_pctrl;
+
+static void msm_ps_hold_poweroff(void)
+{
+	msm_ps_hold_restart(&poweroff_pctrl->restart_nb, 0, NULL);
+}
+
+static void msm_pinctrl_setup_pm_reset(struct msm_pinctrl *pctrl)
+{
+	int i;
+	const struct msm_function *func = pctrl->soc->functions;
+
+	for (i = 0; i < pctrl->soc->nfunctions; i++)
+		if (!strcmp(func[i].name, "ps_hold")) {
+			pctrl->restart_nb.notifier_call = msm_ps_hold_restart;
+			pctrl->restart_nb.priority = 128;
+			if (register_restart_handler(&pctrl->restart_nb))
+				dev_err(pctrl->dev,
+					"failed to setup restart handler.\n");
+			poweroff_pctrl = pctrl;
+			pm_power_off = msm_ps_hold_poweroff;
+			break;
+		}
+}
+
+static __maybe_unused int msm_pinctrl_suspend(struct device *dev)
+{
+	struct msm_pinctrl *pctrl = dev_get_drvdata(dev);
+
+	return pinctrl_force_sleep(pctrl->pctrl);
+}
+
+static __maybe_unused int msm_pinctrl_resume(struct device *dev)
+{
+	struct msm_pinctrl *pctrl = dev_get_drvdata(dev);
+
+	return pinctrl_force_default(pctrl->pctrl);
+}
+
+SIMPLE_DEV_PM_OPS(msm_pinctrl_dev_pm_ops, msm_pinctrl_suspend,
+		  msm_pinctrl_resume);
+
+EXPORT_SYMBOL(msm_pinctrl_dev_pm_ops);
+
+int msm_pinctrl_probe(struct platform_device *pdev,
+		      const struct msm_pinctrl_soc_data *soc_data)
+{
+	struct msm_pinctrl *pctrl;
+	struct resource *res;
+	int ret;
+	int i;
+
+	pctrl = devm_kzalloc(&pdev->dev, sizeof(*pctrl), GFP_KERNEL);
+	if (!pctrl)
+		return -ENOMEM;
+
+	pctrl->dev = &pdev->dev;
+	pctrl->soc = soc_data;
+	pctrl->chip = msm_gpio_template;
+	pctrl->intr_target_use_scm = of_device_is_compatible(
+					pctrl->dev->of_node,
+					"qcom,ipq8064-pinctrl");
+
+	raw_spin_lock_init(&pctrl->lock);
+
+	if (soc_data->tiles) {
+		for (i = 0; i < soc_data->ntiles; i++) {
+			res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+							   soc_data->tiles[i]);
+			pctrl->regs[i] = devm_ioremap_resource(&pdev->dev, res);
+			if (IS_ERR(pctrl->regs[i]))
+				return PTR_ERR(pctrl->regs[i]);
+		}
+	} else {
+		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+		pctrl->regs[0] = devm_ioremap_resource(&pdev->dev, res);
+		if (IS_ERR(pctrl->regs[0]))
+			return PTR_ERR(pctrl->regs[0]);
+
+		pctrl->phys_base[0] = res->start;
+	}
+
+	msm_pinctrl_setup_pm_reset(pctrl);
+
+	pctrl->irq = platform_get_irq(pdev, 0);
+	if (pctrl->irq < 0)
+		return pctrl->irq;
+
+	pctrl->desc.owner = THIS_MODULE;
+	pctrl->desc.pctlops = &msm_pinctrl_ops;
+	pctrl->desc.pmxops = &msm_pinmux_ops;
+	pctrl->desc.confops = &msm_pinconf_ops;
+	pctrl->desc.name = dev_name(&pdev->dev);
+	pctrl->desc.pins = pctrl->soc->pins;
+	pctrl->desc.npins = pctrl->soc->npins;
+
+	pctrl->pctrl = devm_pinctrl_register(&pdev->dev, &pctrl->desc, pctrl);
+	if (IS_ERR(pctrl->pctrl)) {
+		dev_err(&pdev->dev, "Couldn't register pinctrl driver\n");
+		return PTR_ERR(pctrl->pctrl);
+	}
+
+	ret = msm_gpio_init(pctrl);
+	if (ret)
+		return ret;
+
+	platform_set_drvdata(pdev, pctrl);
+
+	dev_dbg(&pdev->dev, "Probed Qualcomm pinctrl driver\n");
+
+	return 0;
+}
+EXPORT_SYMBOL(msm_pinctrl_probe);
+
+int msm_pinctrl_remove(struct platform_device *pdev)
+{
+	struct msm_pinctrl *pctrl = platform_get_drvdata(pdev);
+
+	gpiochip_remove(&pctrl->chip);
+
+	unregister_restart_handler(&pctrl->restart_nb);
+
+	return 0;
+}
+EXPORT_SYMBOL(msm_pinctrl_remove);
+