1 files changed, 77 insertions, 26 deletions

diff --git a/drivers/mfd/tps6586x.c b/drivers/mfd/tps6586x.c
index 87ba7ada3bb..721b9186a5d 100644
--- a/drivers/mfd/tps6586x.c
+++ b/drivers/mfd/tps6586x.c
@@ -17,12 +17,14 @@
 
 #include <linux/interrupt.h>
 #include <linux/irq.h>
+#include <linux/irqdomain.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/mutex.h>
 #include <linux/slab.h>
 #include <linux/err.h>
 #include <linux/i2c.h>
+#include <linux/platform_device.h>
 #include <linux/regmap.h>
 
 #include <linux/mfd/core.h>
@@ -92,6 +94,14 @@ static const struct tps6586x_irq_data tps6586x_irqs[] = {
         [TPS6586X_INT_RTC_ALM2] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 1 << 1),
 };
 
+static struct resource tps6586x_rtc_resources[] = {
+        {
+                .start  = TPS6586X_INT_RTC_ALM1,
+                .end    = TPS6586X_INT_RTC_ALM1,
+                .flags  = IORESOURCE_IRQ,
+        },
+};
+
 static struct mfd_cell tps6586x_cell[] = {
         {
                 .name = "tps6586x-gpio",
@@ -101,6 +111,8 @@ static struct mfd_cell tps6586x_cell[] = {
         },
         {
                 .name = "tps6586x-rtc",
+                .num_resources = ARRAY_SIZE(tps6586x_rtc_resources),
+                .resources = &tps6586x_rtc_resources[0],
         },
         {
                 .name = "tps6586x-onkey",
@@ -117,6 +129,7 @@ struct tps6586x {
         int                     irq_base;
         u32                     irq_en;
         u8                      mask_reg[5];
+        struct irq_domain       *irq_domain;
 };
 
 static inline struct tps6586x *dev_to_tps6586x(struct device *dev)
@@ -185,6 +198,14 @@ int tps6586x_update(struct device *dev, int reg, uint8_t val, uint8_t mask)
 }
 EXPORT_SYMBOL_GPL(tps6586x_update);
 
+int tps6586x_irq_get_virq(struct device *dev, int irq)
+{
+        struct tps6586x *tps6586x = dev_to_tps6586x(dev);
+
+        return irq_create_mapping(tps6586x->irq_domain, irq);
+}
+EXPORT_SYMBOL_GPL(tps6586x_irq_get_virq);
+
 static int __remove_subdev(struct device *dev, void *unused)
 {
         platform_device_unregister(to_platform_device(dev));
@@ -206,7 +227,7 @@ static void tps6586x_irq_lock(struct irq_data *data)
 static void tps6586x_irq_enable(struct irq_data *irq_data)
 {
         struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
-        unsigned int __irq = irq_data->irq - tps6586x->irq_base;
+        unsigned int __irq = irq_data->hwirq;
         const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq];
 
         tps6586x->mask_reg[data->mask_reg] &= ~data->mask_mask;
@@ -217,7 +238,7 @@ static void tps6586x_irq_disable(struct irq_data *irq_data)
 {
         struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
 
-        unsigned int __irq = irq_data->irq - tps6586x->irq_base;
+        unsigned int __irq = irq_data->hwirq;
         const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq];
 
         tps6586x->mask_reg[data->mask_reg] |= data->mask_mask;
@@ -240,6 +261,39 @@ static void tps6586x_irq_sync_unlock(struct irq_data *data)
         mutex_unlock(&tps6586x->irq_lock);
 }
 
+static struct irq_chip tps6586x_irq_chip = {
+        .name = "tps6586x",
+        .irq_bus_lock = tps6586x_irq_lock,
+        .irq_bus_sync_unlock = tps6586x_irq_sync_unlock,
+        .irq_disable = tps6586x_irq_disable,
+        .irq_enable = tps6586x_irq_enable,
+};
+
+static int tps6586x_irq_map(struct irq_domain *h, unsigned int virq,
+                                irq_hw_number_t hw)
+{
+        struct tps6586x *tps6586x = h->host_data;
+
+        irq_set_chip_data(virq, tps6586x);
+        irq_set_chip_and_handler(virq, &tps6586x_irq_chip, handle_simple_irq);
+        irq_set_nested_thread(virq, 1);
+
+        /* ARM needs us to explicitly flag the IRQ as valid
+         * and will set them noprobe when we do so. */
+#ifdef CONFIG_ARM
+        set_irq_flags(virq, IRQF_VALID);
+#else
+        irq_set_noprobe(virq);
+#endif
+
+        return 0;
+}
+
+static struct irq_domain_ops tps6586x_domain_ops = {
+        .map    = tps6586x_irq_map,
+        .xlate  = irq_domain_xlate_twocell,
+};
+
 static irqreturn_t tps6586x_irq(int irq, void *data)
 {
         struct tps6586x *tps6586x = data;
@@ -260,7 +314,8 @@ static irqreturn_t tps6586x_irq(int irq, void *data)
                 int i = __ffs(acks);
 
                 if (tps6586x->irq_en & (1 << i))
-                        handle_nested_irq(tps6586x->irq_base + i);
+                        handle_nested_irq(
+                                irq_find_mapping(tps6586x->irq_domain, i));
 
                 acks &= ~(1 << i);
         }
@@ -273,11 +328,8 @@ static int tps6586x_irq_init(struct tps6586x *tps6586x, int irq,
 {
         int i, ret;
         u8 tmp[4];
-
-        if (!irq_base) {
-                dev_warn(tps6586x->dev, "No interrupt support on IRQ base\n");
-                return -EINVAL;
-        }
+        int new_irq_base;
+        int irq_num = ARRAY_SIZE(tps6586x_irqs);
 
         mutex_init(&tps6586x->irq_lock);
         for (i = 0; i < 5; i++) {
@@ -287,25 +339,24 @@ static int tps6586x_irq_init(struct tps6586x *tps6586x, int irq,
 
         tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1, sizeof(tmp), tmp);
 
-        tps6586x->irq_base = irq_base;
-
-        tps6586x->irq_chip.name = "tps6586x";
-        tps6586x->irq_chip.irq_enable = tps6586x_irq_enable;
-        tps6586x->irq_chip.irq_disable = tps6586x_irq_disable;
-        tps6586x->irq_chip.irq_bus_lock = tps6586x_irq_lock;
-        tps6586x->irq_chip.irq_bus_sync_unlock = tps6586x_irq_sync_unlock;
-
-        for (i = 0; i < ARRAY_SIZE(tps6586x_irqs); i++) {
-                int __irq = i + tps6586x->irq_base;
-                irq_set_chip_data(__irq, tps6586x);
-                irq_set_chip_and_handler(__irq, &tps6586x->irq_chip,
-                                         handle_simple_irq);
-                irq_set_nested_thread(__irq, 1);
-#ifdef CONFIG_ARM
-                set_irq_flags(__irq, IRQF_VALID);
-#endif
+        if  (irq_base > 0) {
+                new_irq_base = irq_alloc_descs(irq_base, 0, irq_num, -1);
+                if (new_irq_base < 0) {
+                        dev_err(tps6586x->dev,
+                                "Failed to alloc IRQs: %d\n", new_irq_base);
+                        return new_irq_base;
+                }
+        } else {
+                new_irq_base = 0;
         }
 
+        tps6586x->irq_domain = irq_domain_add_simple(tps6586x->dev->of_node,
+                                irq_num, new_irq_base, &tps6586x_domain_ops,
+                                tps6586x);
+        if (!tps6586x->irq_domain) {
+                dev_err(tps6586x->dev, "Failed to create IRQ domain\n");
+                return -ENOMEM;
+        }
         ret = request_threaded_irq(irq, NULL, tps6586x_irq, IRQF_ONESHOT,
                                    "tps6586x", tps6586x);
 
@@ -461,7 +512,7 @@ static int tps6586x_i2c_probe(struct i2c_client *client,
 
         ret = mfd_add_devices(tps6586x->dev, -1,
                               tps6586x_cell, ARRAY_SIZE(tps6586x_cell),
-                              NULL, 0, NULL);
+                              NULL, 0, tps6586x->irq_domain);
         if (ret < 0) {
                 dev_err(&client->dev, "mfd_add_devices failed: %d\n", ret);
                 goto err_mfd_add;