gpio: msm: Separate out gpio register operations
Have a common file for exposing gpio functionality and move
gpio register operations to a separate file. This allows to
easily add a new variant with different register mappings.
Change-Id: If2a3ef05df9498321bb2256725fec19dce5b6149
Signed-off-by: Sathish Ambley <sambley@codeaurora.org>
diff --git a/drivers/gpio/gpio-msm-common.c b/drivers/gpio/gpio-msm-common.c
new file mode 100644
index 0000000..da3d106
--- /dev/null
+++ b/drivers/gpio/gpio-msm-common.c
@@ -0,0 +1,629 @@
+/* Copyright (c) 2012, Code Aurora Forum. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+#include <linux/bitmap.h>
+#include <linux/bitops.h>
+#include <linux/gpio.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/spinlock.h>
+#include <linux/syscore_ops.h>
+#include <linux/irqdomain.h>
+#include <linux/of.h>
+#include <linux/err.h>
+
+#include <asm/mach/irq.h>
+
+#include <mach/msm_iomap.h>
+#include <mach/gpiomux.h>
+#include <mach/mpm.h>
+#include "gpio-msm-common.h"
+
+enum msm_tlmm_register {
+ SDC4_HDRV_PULL_CTL = 0x20a0,
+ SDC3_HDRV_PULL_CTL = 0x20a4,
+ SDC1_HDRV_PULL_CTL = 0x20a0,
+};
+
+struct tlmm_field_cfg {
+ enum msm_tlmm_register reg;
+ u8 off;
+};
+
+static const struct tlmm_field_cfg tlmm_hdrv_cfgs[] = {
+ {SDC4_HDRV_PULL_CTL, 6}, /* TLMM_HDRV_SDC4_CLK */
+ {SDC4_HDRV_PULL_CTL, 3}, /* TLMM_HDRV_SDC4_CMD */
+ {SDC4_HDRV_PULL_CTL, 0}, /* TLMM_HDRV_SDC4_DATA */
+ {SDC3_HDRV_PULL_CTL, 6}, /* TLMM_HDRV_SDC3_CLK */
+ {SDC3_HDRV_PULL_CTL, 3}, /* TLMM_HDRV_SDC3_CMD */
+ {SDC3_HDRV_PULL_CTL, 0}, /* TLMM_HDRV_SDC3_DATA */
+ {SDC1_HDRV_PULL_CTL, 6}, /* TLMM_HDRV_SDC1_CLK */
+ {SDC1_HDRV_PULL_CTL, 3}, /* TLMM_HDRV_SDC1_CMD */
+ {SDC1_HDRV_PULL_CTL, 0}, /* TLMM_HDRV_SDC1_DATA */
+};
+
+static const struct tlmm_field_cfg tlmm_pull_cfgs[] = {
+ {SDC4_HDRV_PULL_CTL, 11}, /* TLMM_PULL_SDC4_CMD */
+ {SDC4_HDRV_PULL_CTL, 9}, /* TLMM_PULL_SDC4_DATA */
+ {SDC3_HDRV_PULL_CTL, 14}, /* TLMM_PULL_SDC3_CLK */
+ {SDC3_HDRV_PULL_CTL, 11}, /* TLMM_PULL_SDC3_CMD */
+ {SDC3_HDRV_PULL_CTL, 9}, /* TLMM_PULL_SDC3_DATA */
+ {SDC1_HDRV_PULL_CTL, 13}, /* TLMM_PULL_SDC1_CLK */
+ {SDC1_HDRV_PULL_CTL, 11}, /* TLMM_PULL_SDC1_CMD */
+ {SDC1_HDRV_PULL_CTL, 9}, /* TLMM_PULL_SDC1_DATA */
+};
+
+/*
+ * Supported arch specific irq extension.
+ * Default make them NULL.
+ */
+struct irq_chip msm_gpio_irq_extn = {
+ .irq_eoi = NULL,
+ .irq_mask = NULL,
+ .irq_unmask = NULL,
+ .irq_retrigger = NULL,
+ .irq_set_type = NULL,
+ .irq_set_wake = NULL,
+ .irq_disable = NULL,
+};
+
+/**
+ * struct msm_gpio_dev: the MSM8660 SoC GPIO device structure
+ *
+ * @enabled_irqs: a bitmap used to optimize the summary-irq handler. By
+ * keeping track of which gpios are unmasked as irq sources, we avoid
+ * having to do __raw_readl calls on hundreds of iomapped registers each time
+ * the summary interrupt fires in order to locate the active interrupts.
+ *
+ * @wake_irqs: a bitmap for tracking which interrupt lines are enabled
+ * as wakeup sources. When the device is suspended, interrupts which are
+ * not wakeup sources are disabled.
+ *
+ * @dual_edge_irqs: a bitmap used to track which irqs are configured
+ * as dual-edge, as this is not supported by the hardware and requires
+ * some special handling in the driver.
+ */
+struct msm_gpio_dev {
+ struct gpio_chip gpio_chip;
+ DECLARE_BITMAP(enabled_irqs, NR_MSM_GPIOS);
+ DECLARE_BITMAP(wake_irqs, NR_MSM_GPIOS);
+ DECLARE_BITMAP(dual_edge_irqs, NR_MSM_GPIOS);
+ struct irq_domain domain;
+};
+
+static DEFINE_SPINLOCK(tlmm_lock);
+
+static inline struct msm_gpio_dev *to_msm_gpio_dev(struct gpio_chip *chip)
+{
+ return container_of(chip, struct msm_gpio_dev, gpio_chip);
+}
+
+static int msm_gpio_get(struct gpio_chip *chip, unsigned offset)
+{
+ int rc;
+ rc = __msm_gpio_get_inout(offset);
+ mb();
+ return rc;
+}
+
+static void msm_gpio_set(struct gpio_chip *chip, unsigned offset, int val)
+{
+ __msm_gpio_set_inout(offset, val);
+ mb();
+}
+
+static int msm_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
+{
+ unsigned long irq_flags;
+
+ spin_lock_irqsave(&tlmm_lock, irq_flags);
+ __msm_gpio_set_config_direction(offset, 1, 0);
+ mb();
+ spin_unlock_irqrestore(&tlmm_lock, irq_flags);
+ return 0;
+}
+
+static int msm_gpio_direction_output(struct gpio_chip *chip,
+ unsigned offset,
+ int val)
+{
+ unsigned long irq_flags;
+
+ spin_lock_irqsave(&tlmm_lock, irq_flags);
+ __msm_gpio_set_config_direction(offset, 0, val);
+ mb();
+ spin_unlock_irqrestore(&tlmm_lock, irq_flags);
+ return 0;
+}
+
+#ifdef CONFIG_OF
+static int msm_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
+{
+ struct msm_gpio_dev *g_dev = to_msm_gpio_dev(chip);
+ struct irq_domain *domain = &g_dev->domain;
+ return domain->irq_base + (offset - chip->base);
+}
+
+static inline int msm_irq_to_gpio(struct gpio_chip *chip, unsigned irq)
+{
+ struct msm_gpio_dev *g_dev = to_msm_gpio_dev(chip);
+ struct irq_domain *domain = &g_dev->domain;
+ return irq - domain->irq_base;
+}
+#else
+static int msm_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
+{
+ return MSM_GPIO_TO_INT(offset - chip->base);
+}
+
+static inline int msm_irq_to_gpio(struct gpio_chip *chip, unsigned irq)
+{
+ return irq - MSM_GPIO_TO_INT(chip->base);
+}
+#endif
+
+static int msm_gpio_request(struct gpio_chip *chip, unsigned offset)
+{
+ return msm_gpiomux_get(chip->base + offset);
+}
+
+static void msm_gpio_free(struct gpio_chip *chip, unsigned offset)
+{
+ msm_gpiomux_put(chip->base + offset);
+}
+
+static struct msm_gpio_dev msm_gpio = {
+ .gpio_chip = {
+ .label = "msmgpio",
+ .base = 0,
+ .ngpio = NR_MSM_GPIOS,
+ .direction_input = msm_gpio_direction_input,
+ .direction_output = msm_gpio_direction_output,
+ .get = msm_gpio_get,
+ .set = msm_gpio_set,
+ .to_irq = msm_gpio_to_irq,
+ .request = msm_gpio_request,
+ .free = msm_gpio_free,
+ },
+};
+
+static void switch_mpm_config(struct irq_data *d, unsigned val)
+{
+ /* switch the configuration in the mpm as well */
+ if (!msm_gpio_irq_extn.irq_set_type)
+ return;
+
+ if (val)
+ msm_gpio_irq_extn.irq_set_type(d, IRQF_TRIGGER_FALLING);
+ else
+ msm_gpio_irq_extn.irq_set_type(d, IRQF_TRIGGER_RISING);
+}
+
+/* For dual-edge interrupts in software, since the 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, see mach-msm/gpio.c.
+ */
+static void msm_gpio_update_dual_edge_pos(struct irq_data *d, unsigned gpio)
+{
+ int loop_limit = 100;
+ unsigned val, val2, intstat;
+
+ do {
+ val = __msm_gpio_get_inout(gpio);
+ __msm_gpio_set_polarity(gpio, val);
+ val2 = __msm_gpio_get_inout(gpio);
+ intstat = __msm_gpio_get_intr_status(gpio);
+ if (intstat || val == val2) {
+ switch_mpm_config(d, val);
+ return;
+ }
+ } while (loop_limit-- > 0);
+ pr_err("%s: dual-edge irq failed to stabilize, %#08x != %#08x\n",
+ __func__, val, val2);
+}
+
+static void msm_gpio_irq_ack(struct irq_data *d)
+{
+ int gpio = msm_irq_to_gpio(&msm_gpio.gpio_chip, d->irq);
+
+ __msm_gpio_set_intr_status(gpio);
+ if (test_bit(gpio, msm_gpio.dual_edge_irqs))
+ msm_gpio_update_dual_edge_pos(d, gpio);
+ mb();
+}
+
+static void msm_gpio_irq_mask(struct irq_data *d)
+{
+ int gpio = msm_irq_to_gpio(&msm_gpio.gpio_chip, d->irq);
+ unsigned long irq_flags;
+
+ spin_lock_irqsave(&tlmm_lock, irq_flags);
+ __msm_gpio_set_intr_cfg_enable(gpio, 0);
+ __clear_bit(gpio, msm_gpio.enabled_irqs);
+ mb();
+ spin_unlock_irqrestore(&tlmm_lock, irq_flags);
+
+ if (msm_gpio_irq_extn.irq_mask)
+ msm_gpio_irq_extn.irq_mask(d);
+
+}
+
+static void msm_gpio_irq_unmask(struct irq_data *d)
+{
+ int gpio = msm_irq_to_gpio(&msm_gpio.gpio_chip, d->irq);
+ unsigned long irq_flags;
+
+ spin_lock_irqsave(&tlmm_lock, irq_flags);
+ __set_bit(gpio, msm_gpio.enabled_irqs);
+ __msm_gpio_set_intr_cfg_enable(gpio, 1);
+ mb();
+ spin_unlock_irqrestore(&tlmm_lock, irq_flags);
+
+ if (msm_gpio_irq_extn.irq_mask)
+ msm_gpio_irq_extn.irq_unmask(d);
+}
+
+static void msm_gpio_irq_disable(struct irq_data *d)
+{
+ if (msm_gpio_irq_extn.irq_disable)
+ msm_gpio_irq_extn.irq_disable(d);
+}
+
+static int msm_gpio_irq_set_type(struct irq_data *d, unsigned int flow_type)
+{
+ int gpio = msm_irq_to_gpio(&msm_gpio.gpio_chip, d->irq);
+ unsigned long irq_flags;
+
+ spin_lock_irqsave(&tlmm_lock, irq_flags);
+
+ if (flow_type & IRQ_TYPE_EDGE_BOTH) {
+ __irq_set_handler_locked(d->irq, handle_edge_irq);
+ if ((flow_type & IRQ_TYPE_EDGE_BOTH) == IRQ_TYPE_EDGE_BOTH)
+ __set_bit(gpio, msm_gpio.dual_edge_irqs);
+ else
+ __clear_bit(gpio, msm_gpio.dual_edge_irqs);
+ } else {
+ __irq_set_handler_locked(d->irq, handle_level_irq);
+ __clear_bit(gpio, msm_gpio.dual_edge_irqs);
+ }
+
+ __msm_gpio_set_intr_cfg_type(gpio, flow_type);
+
+ if ((flow_type & IRQ_TYPE_EDGE_BOTH) == IRQ_TYPE_EDGE_BOTH)
+ msm_gpio_update_dual_edge_pos(d, gpio);
+
+ mb();
+ spin_unlock_irqrestore(&tlmm_lock, irq_flags);
+
+ if (msm_gpio_irq_extn.irq_set_type)
+ msm_gpio_irq_extn.irq_set_type(d, flow_type);
+
+ return 0;
+}
+
+/*
+ * When the summary IRQ is raised, any number of GPIO lines may be high.
+ * It is the job of the summary handler to find all those GPIO lines
+ * which have been set as summary IRQ lines and which are triggered,
+ * and to call their interrupt handlers.
+ */
+static irqreturn_t msm_summary_irq_handler(int irq, void *data)
+{
+ unsigned long i;
+ struct irq_desc *desc = irq_to_desc(irq);
+ struct irq_chip *chip = irq_desc_get_chip(desc);
+
+ chained_irq_enter(chip, desc);
+
+ for (i = find_first_bit(msm_gpio.enabled_irqs, NR_MSM_GPIOS);
+ i < NR_MSM_GPIOS;
+ i = find_next_bit(msm_gpio.enabled_irqs, NR_MSM_GPIOS, i + 1)) {
+ if (__msm_gpio_get_intr_status(i))
+ generic_handle_irq(msm_gpio_to_irq(&msm_gpio.gpio_chip,
+ i));
+ }
+
+ chained_irq_exit(chip, desc);
+ return IRQ_HANDLED;
+}
+
+static int msm_gpio_irq_set_wake(struct irq_data *d, unsigned int on)
+{
+ int gpio = msm_irq_to_gpio(&msm_gpio.gpio_chip, d->irq);
+
+ if (on) {
+ if (bitmap_empty(msm_gpio.wake_irqs, NR_MSM_GPIOS))
+ irq_set_irq_wake(TLMM_MSM_SUMMARY_IRQ, 1);
+ set_bit(gpio, msm_gpio.wake_irqs);
+ } else {
+ clear_bit(gpio, msm_gpio.wake_irqs);
+ if (bitmap_empty(msm_gpio.wake_irqs, NR_MSM_GPIOS))
+ irq_set_irq_wake(TLMM_MSM_SUMMARY_IRQ, 0);
+ }
+
+ if (msm_gpio_irq_extn.irq_set_wake)
+ msm_gpio_irq_extn.irq_set_wake(d, on);
+
+ return 0;
+}
+
+static struct irq_chip msm_gpio_irq_chip = {
+ .name = "msmgpio",
+ .irq_mask = msm_gpio_irq_mask,
+ .irq_unmask = msm_gpio_irq_unmask,
+ .irq_ack = msm_gpio_irq_ack,
+ .irq_set_type = msm_gpio_irq_set_type,
+ .irq_set_wake = msm_gpio_irq_set_wake,
+ .irq_disable = msm_gpio_irq_disable,
+};
+
+/*
+ * This lock class tells lockdep that GPIO irqs are in a different
+ * category than their parent, so it won't report false recursion.
+ */
+static struct lock_class_key msm_gpio_lock_class;
+
+static int __devinit msm_gpio_probe(void)
+{
+ int i, irq, ret;
+
+ spin_lock_init(&tlmm_lock);
+ bitmap_zero(msm_gpio.enabled_irqs, NR_MSM_GPIOS);
+ bitmap_zero(msm_gpio.wake_irqs, NR_MSM_GPIOS);
+ bitmap_zero(msm_gpio.dual_edge_irqs, NR_MSM_GPIOS);
+ ret = gpiochip_add(&msm_gpio.gpio_chip);
+ if (ret < 0)
+ return ret;
+
+ for (i = 0; i < msm_gpio.gpio_chip.ngpio; ++i) {
+ irq = msm_gpio_to_irq(&msm_gpio.gpio_chip, i);
+ irq_set_lockdep_class(irq, &msm_gpio_lock_class);
+ irq_set_chip_and_handler(irq, &msm_gpio_irq_chip,
+ handle_level_irq);
+ set_irq_flags(irq, IRQF_VALID);
+ }
+
+ ret = request_irq(TLMM_MSM_SUMMARY_IRQ, msm_summary_irq_handler,
+ IRQF_TRIGGER_HIGH, "msmgpio", NULL);
+ if (ret) {
+ pr_err("Request_irq failed for TLMM_MSM_SUMMARY_IRQ - %d\n",
+ ret);
+ return ret;
+ }
+ return 0;
+}
+
+static int __devexit msm_gpio_remove(void)
+{
+ int ret = gpiochip_remove(&msm_gpio.gpio_chip);
+
+ if (ret < 0)
+ return ret;
+
+ irq_set_handler(TLMM_MSM_SUMMARY_IRQ, NULL);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int msm_gpio_suspend(void)
+{
+ unsigned long irq_flags;
+ unsigned long i;
+
+ spin_lock_irqsave(&tlmm_lock, irq_flags);
+ for_each_set_bit(i, msm_gpio.enabled_irqs, NR_MSM_GPIOS)
+ __msm_gpio_set_intr_cfg_enable(i, 0);
+
+ for_each_set_bit(i, msm_gpio.wake_irqs, NR_MSM_GPIOS)
+ __msm_gpio_set_intr_cfg_enable(i, 1);
+ mb();
+ spin_unlock_irqrestore(&tlmm_lock, irq_flags);
+ return 0;
+}
+
+void msm_gpio_show_resume_irq(void)
+{
+ unsigned long irq_flags;
+ int i, irq, intstat;
+
+ if (!msm_show_resume_irq_mask)
+ return;
+
+ spin_lock_irqsave(&tlmm_lock, irq_flags);
+ for_each_set_bit(i, msm_gpio.wake_irqs, NR_MSM_GPIOS) {
+ intstat = __msm_gpio_get_intr_status(i);
+ if (intstat) {
+ irq = msm_gpio_to_irq(&msm_gpio.gpio_chip, i);
+ pr_warning("%s: %d triggered\n",
+ __func__, irq);
+ }
+ }
+ spin_unlock_irqrestore(&tlmm_lock, irq_flags);
+}
+
+static void msm_gpio_resume(void)
+{
+ unsigned long irq_flags;
+ unsigned long i;
+
+ msm_gpio_show_resume_irq();
+
+ spin_lock_irqsave(&tlmm_lock, irq_flags);
+ for_each_set_bit(i, msm_gpio.wake_irqs, NR_MSM_GPIOS)
+ __msm_gpio_set_intr_cfg_enable(i, 0);
+
+ for_each_set_bit(i, msm_gpio.enabled_irqs, NR_MSM_GPIOS)
+ __msm_gpio_set_intr_cfg_enable(i, 1);
+ mb();
+ spin_unlock_irqrestore(&tlmm_lock, irq_flags);
+}
+#else
+#define msm_gpio_suspend NULL
+#define msm_gpio_resume NULL
+#endif
+
+static struct syscore_ops msm_gpio_syscore_ops = {
+ .suspend = msm_gpio_suspend,
+ .resume = msm_gpio_resume,
+};
+
+static int __init msm_gpio_init(void)
+{
+ msm_gpio_probe();
+ register_syscore_ops(&msm_gpio_syscore_ops);
+ return 0;
+}
+
+static void __exit msm_gpio_exit(void)
+{
+ unregister_syscore_ops(&msm_gpio_syscore_ops);
+ msm_gpio_remove();
+}
+
+postcore_initcall(msm_gpio_init);
+module_exit(msm_gpio_exit);
+
+static void msm_tlmm_set_field(const struct tlmm_field_cfg *configs,
+ unsigned id, unsigned width, unsigned val)
+{
+ unsigned long irqflags;
+ u32 mask = (1 << width) - 1;
+ u32 __iomem *reg = MSM_TLMM_BASE + configs[id].reg;
+ u32 reg_val;
+
+ spin_lock_irqsave(&tlmm_lock, irqflags);
+ reg_val = __raw_readl(reg);
+ reg_val &= ~(mask << configs[id].off);
+ reg_val |= (val & mask) << configs[id].off;
+ __raw_writel(reg_val, reg);
+ mb();
+ spin_unlock_irqrestore(&tlmm_lock, irqflags);
+}
+
+void msm_tlmm_set_hdrive(enum msm_tlmm_hdrive_tgt tgt, int drv_str)
+{
+ msm_tlmm_set_field(tlmm_hdrv_cfgs, tgt, 3, drv_str);
+}
+EXPORT_SYMBOL(msm_tlmm_set_hdrive);
+
+void msm_tlmm_set_pull(enum msm_tlmm_pull_tgt tgt, int pull)
+{
+ msm_tlmm_set_field(tlmm_pull_cfgs, tgt, 2, pull);
+}
+EXPORT_SYMBOL(msm_tlmm_set_pull);
+
+int gpio_tlmm_config(unsigned config, unsigned disable)
+{
+ unsigned gpio = GPIO_PIN(config);
+
+ if (gpio > NR_MSM_GPIOS)
+ return -EINVAL;
+
+ __gpio_tlmm_config(config);
+ mb();
+
+ return 0;
+}
+EXPORT_SYMBOL(gpio_tlmm_config);
+
+int msm_gpio_install_direct_irq(unsigned gpio, unsigned irq,
+ unsigned int input_polarity)
+{
+ unsigned long irq_flags;
+
+ if (gpio >= NR_MSM_GPIOS || irq >= NR_TLMM_MSM_DIR_CONN_IRQ)
+ return -EINVAL;
+
+ spin_lock_irqsave(&tlmm_lock, irq_flags);
+ __msm_gpio_install_direct_irq(gpio, irq, input_polarity);
+ mb();
+ spin_unlock_irqrestore(&tlmm_lock, irq_flags);
+
+ return 0;
+}
+EXPORT_SYMBOL(msm_gpio_install_direct_irq);
+
+#ifdef CONFIG_OF
+static int msm_gpio_domain_dt_translate(struct irq_domain *d,
+ struct device_node *controller,
+ const u32 *intspec,
+ unsigned int intsize,
+ unsigned long *out_hwirq,
+ unsigned int *out_type)
+{
+ if (d->of_node != controller)
+ return -EINVAL;
+ if (intsize != 2)
+ return -EINVAL;
+
+ /* hwirq value */
+ *out_hwirq = intspec[0];
+
+ /* irq flags */
+ *out_type = intspec[1] & IRQ_TYPE_SENSE_MASK;
+ return 0;
+}
+
+static struct irq_domain_ops msm_gpio_irq_domain_ops = {
+ .dt_translate = msm_gpio_domain_dt_translate,
+};
+
+int __init msm_gpio_of_init(struct device_node *node,
+ struct device_node *parent)
+{
+ struct irq_domain *domain = &msm_gpio.domain;
+ int start;
+
+ start = irq_domain_find_free_range(0, NR_MSM_GPIOS);
+ domain->irq_base = irq_alloc_descs(start, 0, NR_MSM_GPIOS,
+ numa_node_id());
+ if (IS_ERR_VALUE(domain->irq_base)) {
+ WARN(1, "Cannot allocate irq_descs @ IRQ%d\n", start);
+ return domain->irq_base;
+ }
+
+ domain->irq_base = irq_domain_find_free_range(0, NR_MSM_GPIOS);
+ domain->nr_irq = NR_MSM_GPIOS;
+ domain->of_node = of_node_get(node);
+ domain->priv = &msm_gpio;
+ domain->ops = &msm_gpio_irq_domain_ops;
+ irq_domain_add(domain);
+ pr_debug("%s: irq_base = %u\n", __func__, domain->irq_base);
+
+ return 0;
+}
+#endif
+
+MODULE_AUTHOR("Gregory Bean <gbean@codeaurora.org>");
+MODULE_DESCRIPTION("Driver for Qualcomm MSM TLMMv2 SoC GPIOs");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("sysdev:msmgpio");