8 files changed, 592 insertions, 8 deletions

diff --git a/drivers/gpio/wm8994-gpio.c b/drivers/gpio/wm8994-gpio.c
index 7607cc61e1dd..2ac9a16d3daa 100644
--- a/drivers/gpio/wm8994-gpio.c
+++ b/drivers/gpio/wm8994-gpio.c
@@ -81,6 +81,18 @@ static void wm8994_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
         wm8994_set_bits(wm8994, WM8994_GPIO_1 + offset, WM8994_GPN_LVL, value);
 }
 
+static int wm8994_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
+{
+        struct wm8994_gpio *wm8994_gpio = to_wm8994_gpio(chip);
+        struct wm8994 *wm8994 = wm8994_gpio->wm8994;
+
+        if (!wm8994->irq_base)
+                return -EINVAL;
+
+        return wm8994->irq_base + offset;
+}
+
+
 #ifdef CONFIG_DEBUG_FS
 static void wm8994_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
 {
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 2a5a0b78f84e..de3e74cde51c 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -53,6 +53,10 @@ config MFD_SH_MOBILE_SDHI
           This driver supports the SDHI hardware block found in many
           SuperH Mobile SoCs.
 
+config MFD_DAVINCI_VOICECODEC
+        tristate
+        select MFD_CORE
+
 config MFD_DM355EVM_MSP
         bool "DaVinci DM355 EVM microcontroller"
         depends on I2C && MACH_DAVINCI_DM355_EVM
@@ -297,9 +301,9 @@ config MFD_WM8350_I2C
           selected to enable support for the functionality of the chip.
 
 config MFD_WM8994
-        tristate "Support Wolfson Microelectronics WM8994"
+        bool "Support Wolfson Microelectronics WM8994"
         select MFD_CORE
-        depends on I2C
+        depends on I2C=y && GENERIC_HARDIRQS
         help
           The WM8994 is a highly integrated hi-fi CODEC designed for
           smartphone applicatiosn.  As well as audio functionality it
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 22715add99a7..87935f967aa0 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -12,6 +12,7 @@ obj-$(CONFIG_HTC_EGPIO)		+= htc-egpio.o
 obj-$(CONFIG_HTC_PASIC3)        += htc-pasic3.o
 obj-$(CONFIG_HTC_I2CPLD)        += htc-i2cpld.o
 
+obj-$(CONFIG_MFD_DAVINCI_VOICECODEC)    += davinci_voicecodec.o
 obj-$(CONFIG_MFD_DM355EVM_MSP)  += dm355evm_msp.o
 
 obj-$(CONFIG_MFD_T7L66XB)       += t7l66xb.o tmio_core.o
@@ -25,7 +26,7 @@ wm8350-objs			:= wm8350-core.o wm8350-regmap.o wm8350-gpio.o
 wm8350-objs                     += wm8350-irq.o
 obj-$(CONFIG_MFD_WM8350)        += wm8350.o
 obj-$(CONFIG_MFD_WM8350_I2C)    += wm8350-i2c.o
-obj-$(CONFIG_MFD_WM8994)        += wm8994-core.o
+obj-$(CONFIG_MFD_WM8994)        += wm8994-core.o wm8994-irq.o
 
 obj-$(CONFIG_TPS65010)          += tps65010.o
 obj-$(CONFIG_MENELAUS)          += menelaus.o
diff --git a/drivers/mfd/davinci_voicecodec.c b/drivers/mfd/davinci_voicecodec.c
new file mode 100644
index 000000000000..3e75f02e4778
--- /dev/null
+++ b/drivers/mfd/davinci_voicecodec.c
@@ -0,0 +1,190 @@
+/*
+ * DaVinci Voice Codec Core Interface for TI platforms
+ *
+ * Copyright (C) 2010 Texas Instruments, Inc
+ *
+ * Author: Miguel Aguilar <miguel.aguilar@ridgerun.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/clk.h>
+
+#include <sound/pcm.h>
+
+#include <linux/mfd/davinci_voicecodec.h>
+
+u32 davinci_vc_read(struct davinci_vc *davinci_vc, int reg)
+{
+        return __raw_readl(davinci_vc->base + reg);
+}
+
+void davinci_vc_write(struct davinci_vc *davinci_vc,
+                                           int reg, u32 val)
+{
+        __raw_writel(val, davinci_vc->base + reg);
+}
+
+static int __init davinci_vc_probe(struct platform_device *pdev)
+{
+        struct davinci_vc *davinci_vc;
+        struct resource *res, *mem;
+        struct mfd_cell *cell = NULL;
+        int ret;
+
+        davinci_vc = kzalloc(sizeof(struct davinci_vc), GFP_KERNEL);
+        if (!davinci_vc) {
+                dev_dbg(&pdev->dev,
+                            "could not allocate memory for private data\n");
+                return -ENOMEM;
+        }
+
+        davinci_vc->clk = clk_get(&pdev->dev, NULL);
+        if (IS_ERR(davinci_vc->clk)) {
+                dev_dbg(&pdev->dev,
+                            "could not get the clock for voice codec\n");
+                ret = -ENODEV;
+                goto fail1;
+        }
+        clk_enable(davinci_vc->clk);
+
+        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+        if (!res) {
+                dev_err(&pdev->dev, "no mem resource\n");
+                ret = -ENODEV;
+                goto fail2;
+        }
+
+        davinci_vc->pbase = res->start;
+        davinci_vc->base_size = resource_size(res);
+
+        mem = request_mem_region(davinci_vc->pbase, davinci_vc->base_size,
+                                 pdev->name);
+        if (!mem) {
+                dev_err(&pdev->dev, "VCIF region already claimed\n");
+                ret = -EBUSY;
+                goto fail2;
+        }
+
+        davinci_vc->base = ioremap(davinci_vc->pbase, davinci_vc->base_size);
+        if (!davinci_vc->base) {
+                dev_err(&pdev->dev, "can't ioremap mem resource.\n");
+                ret = -ENOMEM;
+                goto fail3;
+        }
+
+        res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
+        if (!res) {
+                dev_err(&pdev->dev, "no DMA resource\n");
+                return -ENXIO;
+        }
+
+        davinci_vc->davinci_vcif.dma_tx_channel = res->start;
+        davinci_vc->davinci_vcif.dma_tx_addr =
+                (dma_addr_t)(io_v2p(davinci_vc->base) + DAVINCI_VC_WFIFO);
+
+        res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
+        if (!res) {
+                dev_err(&pdev->dev, "no DMA resource\n");
+                return -ENXIO;
+        }
+
+        davinci_vc->davinci_vcif.dma_rx_channel = res->start;
+        davinci_vc->davinci_vcif.dma_rx_addr =
+                (dma_addr_t)(io_v2p(davinci_vc->base) + DAVINCI_VC_RFIFO);
+
+        davinci_vc->dev = &pdev->dev;
+        davinci_vc->pdev = pdev;
+
+        /* Voice codec interface client */
+        cell = &davinci_vc->cells[DAVINCI_VC_VCIF_CELL];
+        cell->name = "davinci_vcif";
+        cell->driver_data = davinci_vc;
+
+        /* Voice codec CQ93VC client */
+        cell = &davinci_vc->cells[DAVINCI_VC_CQ93VC_CELL];
+        cell->name = "cq93vc";
+        cell->driver_data = davinci_vc;
+
+        ret = mfd_add_devices(&pdev->dev, pdev->id, davinci_vc->cells,
+                              DAVINCI_VC_CELLS, NULL, 0);
+        if (ret != 0) {
+                dev_err(&pdev->dev, "fail to register client devices\n");
+                goto fail4;
+        }
+
+        return 0;
+
+fail4:
+        iounmap(davinci_vc->base);
+fail3:
+        release_mem_region(davinci_vc->pbase, davinci_vc->base_size);
+fail2:
+        clk_disable(davinci_vc->clk);
+        clk_put(davinci_vc->clk);
+        davinci_vc->clk = NULL;
+fail1:
+        kfree(davinci_vc);
+
+        return ret;
+}
+
+static int __devexit davinci_vc_remove(struct platform_device *pdev)
+{
+        struct davinci_vc *davinci_vc = platform_get_drvdata(pdev);
+
+        mfd_remove_devices(&pdev->dev);
+
+        iounmap(davinci_vc->base);
+        release_mem_region(davinci_vc->pbase, davinci_vc->base_size);
+
+        clk_disable(davinci_vc->clk);
+        clk_put(davinci_vc->clk);
+        davinci_vc->clk = NULL;
+
+        kfree(davinci_vc);
+
+        return 0;
+}
+
+static struct platform_driver davinci_vc_driver = {
+        .driver = {
+                .name = "davinci_voicecodec",
+                .owner = THIS_MODULE,
+        },
+        .remove = __devexit_p(davinci_vc_remove),
+};
+
+static int __init davinci_vc_init(void)
+{
+        return platform_driver_probe(&davinci_vc_driver, davinci_vc_probe);
+}
+module_init(davinci_vc_init);
+
+static void __exit davinci_vc_exit(void)
+{
+        platform_driver_unregister(&davinci_vc_driver);
+}
+module_exit(davinci_vc_exit);
+
+MODULE_AUTHOR("Miguel Aguilar");
+MODULE_DESCRIPTION("Texas Instruments DaVinci Voice Codec Core Interface");
+MODULE_LICENSE("GPL");
diff --git a/drivers/mfd/twl-core.c b/drivers/mfd/twl-core.c
index 562cd4935e17..720e099e506d 100644
--- a/drivers/mfd/twl-core.c
+++ b/drivers/mfd/twl-core.c
@@ -109,7 +109,7 @@
 #endif
 
 #if defined(CONFIG_TWL4030_CODEC) || defined(CONFIG_TWL4030_CODEC_MODULE) ||\
-        defined(CONFIG_SND_SOC_TWL6030) || defined(CONFIG_SND_SOC_TWL6030_MODULE)
+        defined(CONFIG_SND_SOC_TWL6040) || defined(CONFIG_SND_SOC_TWL6040_MODULE)
 #define twl_has_codec() true
 #else
 #define twl_has_codec() false
@@ -708,7 +708,7 @@ add_children(struct twl4030_platform_data *pdata, unsigned long features)
         /* Phoenix*/
         if (twl_has_codec() && pdata->codec && twl_class_is_6030()) {
                 sub_chip_id = twl_map[TWL_MODULE_AUDIO_VOICE].sid;
-                child = add_child(sub_chip_id, "twl6030_codec",
+                child = add_child(sub_chip_id, "twl6040_codec",
                                 pdata->codec, sizeof(*pdata->codec),
                                 false, 0, 0);
                 if (IS_ERR(child))
diff --git a/drivers/mfd/wm831x-irq.c b/drivers/mfd/wm831x-irq.c
index 301327697117..4c1122ceb443 100644
--- a/drivers/mfd/wm831x-irq.c
+++ b/drivers/mfd/wm831x-irq.c
@@ -21,6 +21,7 @@
 
 #include <linux/mfd/wm831x/core.h>
 #include <linux/mfd/wm831x/pdata.h>
+#include <linux/mfd/wm831x/gpio.h>
 #include <linux/mfd/wm831x/irq.h>
 
 #include <linux/delay.h>
@@ -388,12 +389,41 @@ static void wm831x_irq_mask(unsigned int irq)
         wm831x->irq_masks_cur[irq_data->reg - 1] |= irq_data->mask;
 }
 
+static int wm831x_irq_set_type(unsigned int irq, unsigned int type)
+{
+        struct wm831x *wm831x = get_irq_chip_data(irq);
+        int val;
+
+        irq = irq - wm831x->irq_base;
+
+        if (irq < WM831X_IRQ_GPIO_1 || irq > WM831X_IRQ_GPIO_11)
+                return -EINVAL;
+
+        switch (type) {
+        case IRQ_TYPE_EDGE_BOTH:
+                val = WM831X_GPN_INT_MODE;
+                break;
+        case IRQ_TYPE_EDGE_RISING:
+                val = WM831X_GPN_POL;
+                break;
+        case IRQ_TYPE_EDGE_FALLING:
+                val = 0;
+                break;
+        default:
+                return -EINVAL;
+        }
+
+        return wm831x_set_bits(wm831x, WM831X_GPIO1_CONTROL + irq,
+                               WM831X_GPN_INT_MODE | WM831X_GPN_POL, val);
+}
+
 static struct irq_chip wm831x_irq_chip = {
         .name = "wm831x",
         .bus_lock = wm831x_irq_lock,
         .bus_sync_unlock = wm831x_irq_sync_unlock,
         .mask = wm831x_irq_mask,
         .unmask = wm831x_irq_unmask,
+        .set_type = wm831x_irq_set_type,
 };
 
 /* The processing of the primary interrupt occurs in a thread so that
diff --git a/drivers/mfd/wm8994-core.c b/drivers/mfd/wm8994-core.c
index cc524df10aa1..ec71c9368906 100644
--- a/drivers/mfd/wm8994-core.c
+++ b/drivers/mfd/wm8994-core.c
@@ -173,9 +173,34 @@ static struct mfd_cell wm8994_regulator_devs[] = {
         { .name = "wm8994-ldo", .id = 2 },
 };
 
+static struct resource wm8994_codec_resources[] = {
+        {
+                .start = WM8994_IRQ_TEMP_SHUT,
+                .end   = WM8994_IRQ_TEMP_WARN,
+                .flags = IORESOURCE_IRQ,
+        },
+};
+
+static struct resource wm8994_gpio_resources[] = {
+        {
+                .start = WM8994_IRQ_GPIO(1),
+                .end   = WM8994_IRQ_GPIO(11),
+                .flags = IORESOURCE_IRQ,
+        },
+};
+
 static struct mfd_cell wm8994_devs[] = {
-        { .name = "wm8994-codec" },
-        { .name = "wm8994-gpio" },
+        {
+                .name = "wm8994-codec",
+                .num_resources = ARRAY_SIZE(wm8994_codec_resources),
+                .resources = wm8994_codec_resources,
+        },
+
+        {
+                .name = "wm8994-gpio",
+                .num_resources = ARRAY_SIZE(wm8994_gpio_resources),
+                .resources = wm8994_gpio_resources,
+        },
 };
 
 /*
@@ -236,6 +261,11 @@ static int wm8994_device_resume(struct device *dev)
                 return ret;
         }
 
+        ret = wm8994_write(wm8994, WM8994_INTERRUPT_STATUS_1_MASK,
+                           WM8994_NUM_IRQ_REGS * 2, &wm8994->irq_masks_cur);
+        if (ret < 0)
+                dev_err(dev, "Failed to restore interrupt masks: %d\n", ret);
+
         ret = wm8994_write(wm8994, WM8994_LDO_1, WM8994_NUM_LDO_REGS * 2,
                            &wm8994->ldo_regs);
         if (ret < 0)
@@ -348,6 +378,7 @@ static int wm8994_device_init(struct wm8994 *wm8994, unsigned long id, int irq)
 
 
         if (pdata) {
+                wm8994->irq_base = pdata->irq_base;
                 wm8994->gpio_base = pdata->gpio_base;
 
                 /* GPIO configuration is only applied if it's non-zero */
@@ -375,16 +406,20 @@ static int wm8994_device_init(struct wm8994 *wm8994, unsigned long id, int irq)
                                         WM8994_LDO1_DISCH, 0);
         }
 
+        wm8994_irq_init(wm8994);
+
         ret = mfd_add_devices(wm8994->dev, -1,
                               wm8994_devs, ARRAY_SIZE(wm8994_devs),
                               NULL, 0);
         if (ret != 0) {
                 dev_err(wm8994->dev, "Failed to add children: %d\n", ret);
-                goto err_enable;
+                goto err_irq;
         }
 
         return 0;
 
+err_irq:
+        wm8994_irq_exit(wm8994);
 err_enable:
         regulator_bulk_disable(ARRAY_SIZE(wm8994_main_supplies),
                                wm8994->supplies);
@@ -401,6 +436,7 @@ err:
 static void wm8994_device_exit(struct wm8994 *wm8994)
 {
         mfd_remove_devices(wm8994->dev);
+        wm8994_irq_exit(wm8994);
         regulator_bulk_disable(ARRAY_SIZE(wm8994_main_supplies),
                                wm8994->supplies);
         regulator_bulk_free(ARRAY_SIZE(wm8994_main_supplies), wm8994->supplies);
@@ -469,6 +505,7 @@ static int wm8994_i2c_probe(struct i2c_client *i2c,
         wm8994->control_data = i2c;
         wm8994->read_dev = wm8994_i2c_read_device;
         wm8994->write_dev = wm8994_i2c_write_device;
+        wm8994->irq = i2c->irq;
 
         return wm8994_device_init(wm8994, id->driver_data, i2c->irq);
 }
diff --git a/drivers/mfd/wm8994-irq.c b/drivers/mfd/wm8994-irq.c
new file mode 100644
index 000000000000..8400eb1ee5db
--- /dev/null
+++ b/drivers/mfd/wm8994-irq.c
@@ -0,0 +1,310 @@
+/*
+ * wm8994-irq.c  --  Interrupt controller support for Wolfson WM8994
+ *
+ * Copyright 2010 Wolfson Microelectronics PLC.
+ *
+ * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
+ *
+ *  This program is free software; you can redistribute  it and/or modify it
+ *  under  the terms of  the GNU General  Public License as published by the
+ *  Free Software Foundation;  either version 2 of the  License, or (at your
+ *  option) any later version.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/irq.h>
+#include <linux/mfd/core.h>
+#include <linux/interrupt.h>
+
+#include <linux/mfd/wm8994/core.h>
+#include <linux/mfd/wm8994/registers.h>
+
+#include <linux/delay.h>
+
+struct wm8994_irq_data {
+        int reg;
+        int mask;
+};
+
+static struct wm8994_irq_data wm8994_irqs[] = {
+        [WM8994_IRQ_TEMP_SHUT] = {
+                .reg = 2,
+                .mask = WM8994_TEMP_SHUT_EINT,
+        },
+        [WM8994_IRQ_MIC1_DET] = {
+                .reg = 2,
+                .mask = WM8994_MIC1_DET_EINT,
+        },
+        [WM8994_IRQ_MIC1_SHRT] = {
+                .reg = 2,
+                .mask = WM8994_MIC1_SHRT_EINT,
+        },
+        [WM8994_IRQ_MIC2_DET] = {
+                .reg = 2,
+                .mask = WM8994_MIC2_DET_EINT,
+        },
+        [WM8994_IRQ_MIC2_SHRT] = {
+                .reg = 2,
+                .mask = WM8994_MIC2_SHRT_EINT,
+        },
+        [WM8994_IRQ_FLL1_LOCK] = {
+                .reg = 2,
+                .mask = WM8994_FLL1_LOCK_EINT,
+        },
+        [WM8994_IRQ_FLL2_LOCK] = {
+                .reg = 2,
+                .mask = WM8994_FLL2_LOCK_EINT,
+        },
+        [WM8994_IRQ_SRC1_LOCK] = {
+                .reg = 2,
+                .mask = WM8994_SRC1_LOCK_EINT,
+        },
+        [WM8994_IRQ_SRC2_LOCK] = {
+                .reg = 2,
+                .mask = WM8994_SRC2_LOCK_EINT,
+        },
+        [WM8994_IRQ_AIF1DRC1_SIG_DET] = {
+                .reg = 2,
+                .mask = WM8994_AIF1DRC1_SIG_DET,
+        },
+        [WM8994_IRQ_AIF1DRC2_SIG_DET] = {
+                .reg = 2,
+                .mask = WM8994_AIF1DRC2_SIG_DET_EINT,
+        },
+        [WM8994_IRQ_AIF2DRC_SIG_DET] = {
+                .reg = 2,
+                .mask = WM8994_AIF2DRC_SIG_DET_EINT,
+        },
+        [WM8994_IRQ_FIFOS_ERR] = {
+                .reg = 2,
+                .mask = WM8994_FIFOS_ERR_EINT,
+        },
+        [WM8994_IRQ_WSEQ_DONE] = {
+                .reg = 2,
+                .mask = WM8994_WSEQ_DONE_EINT,
+        },
+        [WM8994_IRQ_DCS_DONE] = {
+                .reg = 2,
+                .mask = WM8994_DCS_DONE_EINT,
+        },
+        [WM8994_IRQ_TEMP_WARN] = {
+                .reg = 2,
+                .mask = WM8994_TEMP_WARN_EINT,
+        },
+        [WM8994_IRQ_GPIO(1)] = {
+                .reg = 1,
+                .mask = WM8994_GP1_EINT,
+        },
+        [WM8994_IRQ_GPIO(2)] = {
+                .reg = 1,
+                .mask = WM8994_GP2_EINT,
+        },
+        [WM8994_IRQ_GPIO(3)] = {
+                .reg = 1,
+                .mask = WM8994_GP3_EINT,
+        },
+        [WM8994_IRQ_GPIO(4)] = {
+                .reg = 1,
+                .mask = WM8994_GP4_EINT,
+        },
+        [WM8994_IRQ_GPIO(5)] = {
+                .reg = 1,
+                .mask = WM8994_GP5_EINT,
+        },
+        [WM8994_IRQ_GPIO(6)] = {
+                .reg = 1,
+                .mask = WM8994_GP6_EINT,
+        },
+        [WM8994_IRQ_GPIO(7)] = {
+                .reg = 1,
+                .mask = WM8994_GP7_EINT,
+        },
+        [WM8994_IRQ_GPIO(8)] = {
+                .reg = 1,
+                .mask = WM8994_GP8_EINT,
+        },
+        [WM8994_IRQ_GPIO(9)] = {
+                .reg = 1,
+                .mask = WM8994_GP8_EINT,
+        },
+        [WM8994_IRQ_GPIO(10)] = {
+                .reg = 1,
+                .mask = WM8994_GP10_EINT,
+        },
+        [WM8994_IRQ_GPIO(11)] = {
+                .reg = 1,
+                .mask = WM8994_GP11_EINT,
+        },
+};
+
+static inline int irq_data_to_status_reg(struct wm8994_irq_data *irq_data)
+{
+        return WM8994_INTERRUPT_STATUS_1 - 1 + irq_data->reg;
+}
+
+static inline int irq_data_to_mask_reg(struct wm8994_irq_data *irq_data)
+{
+        return WM8994_INTERRUPT_STATUS_1_MASK - 1 + irq_data->reg;
+}
+
+static inline struct wm8994_irq_data *irq_to_wm8994_irq(struct wm8994 *wm8994,
+                                                        int irq)
+{
+        return &wm8994_irqs[irq - wm8994->irq_base];
+}
+
+static void wm8994_irq_lock(unsigned int irq)
+{
+        struct wm8994 *wm8994 = get_irq_chip_data(irq);
+
+        mutex_lock(&wm8994->irq_lock);
+}
+
+static void wm8994_irq_sync_unlock(unsigned int irq)
+{
+        struct wm8994 *wm8994 = get_irq_chip_data(irq);
+        int i;
+
+        for (i = 0; i < ARRAY_SIZE(wm8994->irq_masks_cur); i++) {
+                /* If there's been a change in the mask write it back
+                 * to the hardware. */
+                if (wm8994->irq_masks_cur[i] != wm8994->irq_masks_cache[i]) {
+                        wm8994->irq_masks_cache[i] = wm8994->irq_masks_cur[i];
+                        wm8994_reg_write(wm8994,
+                                         WM8994_INTERRUPT_STATUS_1_MASK + i,
+                                         wm8994->irq_masks_cur[i]);
+                }
+        }
+
+        mutex_unlock(&wm8994->irq_lock);
+}
+
+static void wm8994_irq_unmask(unsigned int irq)
+{
+        struct wm8994 *wm8994 = get_irq_chip_data(irq);
+        struct wm8994_irq_data *irq_data = irq_to_wm8994_irq(wm8994, irq);
+
+        wm8994->irq_masks_cur[irq_data->reg - 1] &= ~irq_data->mask;
+}
+
+static void wm8994_irq_mask(unsigned int irq)
+{
+        struct wm8994 *wm8994 = get_irq_chip_data(irq);
+        struct wm8994_irq_data *irq_data = irq_to_wm8994_irq(wm8994, irq);
+
+        wm8994->irq_masks_cur[irq_data->reg - 1] |= irq_data->mask;
+}
+
+static struct irq_chip wm8994_irq_chip = {
+        .name = "wm8994",
+        .bus_lock = wm8994_irq_lock,
+        .bus_sync_unlock = wm8994_irq_sync_unlock,
+        .mask = wm8994_irq_mask,
+        .unmask = wm8994_irq_unmask,
+};
+
+/* The processing of the primary interrupt occurs in a thread so that
+ * we can interact with the device over I2C or SPI. */
+static irqreturn_t wm8994_irq_thread(int irq, void *data)
+{
+        struct wm8994 *wm8994 = data;
+        unsigned int i;
+        u16 status[WM8994_NUM_IRQ_REGS];
+        int ret;
+
+        ret = wm8994_bulk_read(wm8994, WM8994_INTERRUPT_STATUS_1,
+                               WM8994_NUM_IRQ_REGS, status);
+        if (ret < 0) {
+                dev_err(wm8994->dev, "Failed to read interrupt status: %d\n",
+                        ret);
+                return IRQ_NONE;
+        }
+
+        /* Apply masking */
+        for (i = 0; i < WM8994_NUM_IRQ_REGS; i++)
+                status[i] &= ~wm8994->irq_masks_cur[i];
+
+        /* Report */
+        for (i = 0; i < ARRAY_SIZE(wm8994_irqs); i++) {
+                if (status[wm8994_irqs[i].reg - 1] & wm8994_irqs[i].mask)
+                        handle_nested_irq(wm8994->irq_base + i);
+        }
+
+        /* Ack any unmasked IRQs */
+        for (i = 0; i < ARRAY_SIZE(status); i++) {
+                if (status[i])
+                        wm8994_reg_write(wm8994, WM8994_INTERRUPT_STATUS_1 + i,
+                                         status[i]);
+        }
+
+        return IRQ_HANDLED;
+}
+
+int wm8994_irq_init(struct wm8994 *wm8994)
+{
+        int i, cur_irq, ret;
+
+        mutex_init(&wm8994->irq_lock);
+
+        /* Mask the individual interrupt sources */
+        for (i = 0; i < ARRAY_SIZE(wm8994->irq_masks_cur); i++) {
+                wm8994->irq_masks_cur[i] = 0xffff;
+                wm8994->irq_masks_cache[i] = 0xffff;
+                wm8994_reg_write(wm8994, WM8994_INTERRUPT_STATUS_1_MASK + i,
+                                 0xffff);
+        }
+
+        if (!wm8994->irq) {
+                dev_warn(wm8994->dev,
+                         "No interrupt specified, no interrupts\n");
+                wm8994->irq_base = 0;
+                return 0;
+        }
+
+        if (!wm8994->irq_base) {
+                dev_err(wm8994->dev,
+                        "No interrupt base specified, no interrupts\n");
+                return 0;
+        }
+
+        /* Register them with genirq */
+        for (cur_irq = wm8994->irq_base;
+             cur_irq < ARRAY_SIZE(wm8994_irqs) + wm8994->irq_base;
+             cur_irq++) {
+                set_irq_chip_data(cur_irq, wm8994);
+                set_irq_chip_and_handler(cur_irq, &wm8994_irq_chip,
+                                         handle_edge_irq);
+                set_irq_nested_thread(cur_irq, 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(cur_irq, IRQF_VALID);
+#else
+                set_irq_noprobe(cur_irq);
+#endif
+        }
+
+        ret = request_threaded_irq(wm8994->irq, NULL, wm8994_irq_thread,
+                                   IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
+                                   "wm8994", wm8994);
+        if (ret != 0) {
+                dev_err(wm8994->dev, "Failed to request IRQ %d: %d\n",
+                        wm8994->irq, ret);
+                return ret;
+        }
+
+        /* Enable top level interrupt if it was masked */
+        wm8994_reg_write(wm8994, WM8994_INTERRUPT_CONTROL, 0);
+
+        return 0;
+}
+
+void wm8994_irq_exit(struct wm8994 *wm8994)
+{
+        if (wm8994->irq)
+                free_irq(wm8994->irq, wm8994);
+}