Merge tag 'mfd-next-5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd

Pull MFD updates from Lee Jones:
 "New Drivers:
   - Add support for Merrifield Basin Cove PMIC

  New Device Support:
   - Add support for Intel Tiger Lake to Intel LPSS PCI
   - Add support for Intel Sky Lake to Intel LPSS PCI
   - Add support for ST-Ericsson DB8520 to DB8500 PRCMU

  New Functionality:
   - Add RTC and PWRC support to MT6323

  Fix-ups:
   - Clean-up include files; davinci_voicecodec, asic3, sm501, mt6397
   - Ignore return values from debugfs_create*(); ab3100-*, ab8500-debugfs, aat2870-core
   - Device Tree changes; rn5t618, mt6397
   - Use new I2C API; tps80031, 88pm860x-core, ab3100-core, bcm590xx,
                      da9150-core, max14577, max77693, max77843, max8907,
                      max8925-i2c, max8997, max8998, palmas, twl-core,
   - Remove obsolete code; da9063, jz4740-adc
   - Simplify semantics; timberdale, htc-i2cpld
   - Add 'fall-through' tags; omap-usb-host, db8500-prcmu
   - Remove superfluous prints; ab8500-debugfs, db8500-prcmu, fsl-imx25-tsadc,
                                intel_soc_pmic_bxtwc, qcom_rpm, sm501
   - Trivial rename/whitespace/typo fixes; mt6397-core, MAINTAINERS
   - Reorganise code structure; mt6397-*
   - Improve code consistency; intel-lpss
   - Use MODULE_SOFTDEP() helper; intel-lpss
   - Use DEFINE_RES_*() helpers; mt6397-core

  Bug Fixes:
   - Clean-up resources; max77620
   - Prevent input events being dropped on resume; intel-lpss-pci
   - Prevent sleeping in IRQ context; ezx-pcap"

* tag 'mfd-next-5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd: (48 commits)
  mfd: mt6323: Add MT6323 RTC and PWRC
  mfd: mt6323: Replace boilerplate resource code with DEFINE_RES_* macros
  mfd: mt6397: Add mutex include
  dt-bindings: mfd: mediatek: Add MT6323 Power Controller
  dt-bindings: mfd: mediatek: Update RTC to include MT6323
  dt-bindings: mfd: mediatek: mt6397: Change to relative paths
  mfd: db8500-prcmu: Support the higher DB8520 ARMSS
  mfd: intel-lpss: Use MODULE_SOFTDEP() instead of implicit request
  mfd: htc-i2cpld: Drop check because i2c_unregister_device() is NULL safe
  mfd: sm501: Include the GPIO driver header
  mfd: intel-lpss: Add Intel Skylake ACPI IDs
  mfd: intel-lpss: Consistently use GENMASK()
  mfd: Add support for Merrifield Basin Cove PMIC
  mfd: ezx-pcap: Replace mutex_lock with spin_lock
  mfd: asic3: Include the right header
  MAINTAINERS: altera-sysmgr: Fix typo in a filepath
  mfd: mt6397: Extract IRQ related code from core driver
  mfd: mt6397: Rename macros to something more readable
  mfd: Remove dev_err() usage after platform_get_irq()
  mfd: db8500-prcmu: Mark expected switch fall-throughs
  ...

45 files changed, 742 insertions, 727 deletions

diff --git a/Documentation/devicetree/bindings/mfd/mt6397.txt b/Documentation/devicetree/bindings/mfd/mt6397.txt
index 0ebd08af777d..a9b105ac00a8 100644
--- a/Documentation/devicetree/bindings/mfd/mt6397.txt
+++ b/Documentation/devicetree/bindings/mfd/mt6397.txt
@@ -8,11 +8,12 @@ MT6397/MT6323 is a multifunction device with the following sub modules:
 - Clock
 - LED
 - Keys
+- Power controller
 
 It is interfaced to host controller using SPI interface by a proprietary hardware
 called PMIC wrapper or pwrap. MT6397/MT6323 MFD is a child device of pwrap.
 See the following for pwarp node definitions:
-Documentation/devicetree/bindings/soc/mediatek/pwrap.txt
+../soc/mediatek/pwrap.txt
 
 This document describes the binding for MFD device and its sub module.
 
@@ -22,14 +23,16 @@ compatible: "mediatek,mt6397" or "mediatek,mt6323"
 Optional subnodes:
 
 - rtc
-	Required properties:
+	Required properties: Should be one of follows
+		- compatible: "mediatek,mt6323-rtc"
 		- compatible: "mediatek,mt6397-rtc"
+	For details, see ../rtc/rtc-mt6397.txt
 - regulators
 	Required properties:
 		- compatible: "mediatek,mt6397-regulator"
-	see Documentation/devicetree/bindings/regulator/mt6397-regulator.txt
+	see ../regulator/mt6397-regulator.txt
 		- compatible: "mediatek,mt6323-regulator"
-	see Documentation/devicetree/bindings/regulator/mt6323-regulator.txt
+	see ../regulator/mt6323-regulator.txt
 - codec
 	Required properties:
 		- compatible: "mediatek,mt6397-codec"
@@ -39,12 +42,17 @@ Optional subnodes:
 - led
 	Required properties:
 		- compatible: "mediatek,mt6323-led"
-	see Documentation/devicetree/bindings/leds/leds-mt6323.txt
+	see ../leds/leds-mt6323.txt
 
 - keys
 	Required properties:
 		- compatible: "mediatek,mt6397-keys" or "mediatek,mt6323-keys"
-	see Documentation/devicetree/bindings/input/mtk-pmic-keys.txt
+	see ../input/mtk-pmic-keys.txt
+
+- power-controller
+	Required properties:
+		- compatible: "mediatek,mt6323-pwrc"
+	For details, see ../power/reset/mt6323-poweroff.txt
 
 Example:
 	pwrap: pwrap@1000f000 {
diff --git a/Documentation/devicetree/bindings/mfd/rn5t618.txt b/Documentation/devicetree/bindings/mfd/rn5t618.txt
index 65c23263cc54..b74e5e94d1cb 100644
--- a/Documentation/devicetree/bindings/mfd/rn5t618.txt
+++ b/Documentation/devicetree/bindings/mfd/rn5t618.txt
@@ -14,6 +14,10 @@ Required properties:
 		"ricoh,rc5t619"
  - reg: the I2C slave address of the device
 
+Optional properties:
+ - system-power-controller:
+   See Documentation/devicetree/bindings/power/power-controller.txt
+
 Sub-nodes:
  - regulators: the node is required if the regulator functionality is
    needed. The valid regulator names are: DCDC1, DCDC2, DCDC3, DCDC4
@@ -28,6 +32,7 @@ Example:
 	pmic@32 {
 		compatible = "ricoh,rn5t618";
 		reg = <0x32>;
+		system-power-controller;
 
 		regulators {
 			DCDC1 {
diff --git a/Documentation/devicetree/bindings/power/reset/mt6323-poweroff.txt b/Documentation/devicetree/bindings/power/reset/mt6323-poweroff.txt
new file mode 100644
index 000000000000..933f0c48e887
--- /dev/null
+++ b/Documentation/devicetree/bindings/power/reset/mt6323-poweroff.txt
@@ -0,0 +1,20 @@
+Device Tree Bindings for Power Controller on MediaTek PMIC
+
+The power controller which could be found on PMIC is responsible for externally
+powering off or on the remote MediaTek SoC through the circuit BBPU.
+
+Required properties:
+- compatible: Should be one of follows
+       "mediatek,mt6323-pwrc": for MT6323 PMIC
+
+Example:
+
+       pmic {
+               compatible = "mediatek,mt6323";
+
+               ...
+
+               power-controller {
+                       compatible = "mediatek,mt6323-pwrc";
+               };
+       }
diff --git a/MAINTAINERS b/MAINTAINERS
index 1360243a7ff3..54f1286087e9 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -728,7 +728,7 @@ ALTERA SYSTEM MANAGER DRIVER
 M:	Thor Thayer <thor.thayer@linux.intel.com>
 S:	Maintained
 F:	drivers/mfd/altera-sysmgr.c
-F:	include/linux/mfd/altera-sysgmr.h
+F:	include/linux/mfd/altera-sysmgr.h
 
 ALTERA SYSTEM RESOURCE DRIVER FOR ARRIA10 DEVKIT
 M:	Thor Thayer <thor.thayer@linux.intel.com>
diff --git a/drivers/mfd/88pm800.c b/drivers/mfd/88pm800.c
index f2d9fb4c4e8e..4e8d0d6b9b5c 100644
--- a/drivers/mfd/88pm800.c
+++ b/drivers/mfd/88pm800.c
@@ -425,10 +425,10 @@ static int pm800_pages_init(struct pm80x_chip *chip)
 		return -ENODEV;
 
 	/* PM800 block power page */
-	subchip->power_page = i2c_new_dummy(client->adapter,
+	subchip->power_page = i2c_new_dummy_device(client->adapter,
 					    subchip->power_page_addr);
-	if (subchip->power_page == NULL) {
-		ret = -ENODEV;
+	if (IS_ERR(subchip->power_page)) {
+		ret = PTR_ERR(subchip->power_page);
 		goto out;
 	}
 
@@ -444,10 +444,10 @@ static int pm800_pages_init(struct pm80x_chip *chip)
 	i2c_set_clientdata(subchip->power_page, chip);
 
 	/* PM800 block GPADC */
-	subchip->gpadc_page = i2c_new_dummy(client->adapter,
+	subchip->gpadc_page = i2c_new_dummy_device(client->adapter,
 					    subchip->gpadc_page_addr);
-	if (subchip->gpadc_page == NULL) {
-		ret = -ENODEV;
+	if (IS_ERR(subchip->gpadc_page)) {
+		ret = PTR_ERR(subchip->gpadc_page);
 		goto out;
 	}
 
diff --git a/drivers/mfd/88pm860x-core.c b/drivers/mfd/88pm860x-core.c
index 9e0bd135730f..c9bae71f643a 100644
--- a/drivers/mfd/88pm860x-core.c
+++ b/drivers/mfd/88pm860x-core.c
@@ -1178,12 +1178,12 @@ static int pm860x_probe(struct i2c_client *client)
 	 */
 	if (pdata->companion_addr && (pdata->companion_addr != client->addr)) {
 		chip->companion_addr = pdata->companion_addr;
-		chip->companion = i2c_new_dummy(chip->client->adapter,
+		chip->companion = i2c_new_dummy_device(chip->client->adapter,
 						chip->companion_addr);
-		if (!chip->companion) {
+		if (IS_ERR(chip->companion)) {
 			dev_err(&client->dev,
 				"Failed to allocate I2C companion device\n");
-			return -ENODEV;
+			return PTR_ERR(chip->companion);
 		}
 		chip->regmap_companion = regmap_init_i2c(chip->companion,
 							&pm860x_regmap_config);
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index c9c49da42446..ae24d3ea68ea 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -589,6 +589,17 @@ config INTEL_SOC_PMIC_CHTDC_TI
 	  Select this option for supporting Dollar Cove (TI version) PMIC
 	  device that is found on some Intel Cherry Trail systems.
 
+config INTEL_SOC_PMIC_MRFLD
+	tristate "Support for Intel Merrifield Basin Cove PMIC"
+	depends on GPIOLIB
+	depends on ACPI
+	depends on INTEL_SCU_IPC
+	select MFD_CORE
+	select REGMAP_IRQ
+	help
+	  Select this option for supporting Basin Cove PMIC device
+	  that is found on Intel Merrifield systems.
+
 config MFD_INTEL_LPSS
 	tristate
 	select COMMON_CLK
@@ -641,15 +652,6 @@ config MFD_JANZ_CMODIO
 	  host many different types of MODULbus daughterboards, including
 	  CAN and GPIO controllers.
 
-config MFD_JZ4740_ADC
-	bool "Janz JZ4740 ADC core"
-	select MFD_CORE
-	select GENERIC_IRQ_CHIP
-	depends on MACH_JZ4740
-	help
-	  Say yes here if you want support for the ADC unit in the JZ4740 SoC.
-	  This driver is necessary for jz4740-battery and jz4740-hwmon driver.
-
 config MFD_KEMPLD
 	tristate "Kontron module PLD device"
 	select MFD_CORE
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 0c0a848e62df..c1067ea46204 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -189,7 +189,6 @@ obj-$(CONFIG_LPC_SCH)		+= lpc_sch.o
 obj-$(CONFIG_LPC_ICH)		+= lpc_ich.o
 obj-$(CONFIG_MFD_RDC321X)	+= rdc321x-southbridge.o
 obj-$(CONFIG_MFD_JANZ_CMODIO)	+= janz-cmodio.o
-obj-$(CONFIG_MFD_JZ4740_ADC)	+= jz4740-adc.o
 obj-$(CONFIG_MFD_TPS6586X)	+= tps6586x.o
 obj-$(CONFIG_MFD_VX855)		+= vx855.o
 obj-$(CONFIG_MFD_WL1273_CORE)	+= wl1273-core.o
@@ -239,7 +238,9 @@ obj-$(CONFIG_INTEL_SOC_PMIC)	+= intel-soc-pmic.o
 obj-$(CONFIG_INTEL_SOC_PMIC_BXTWC)	+= intel_soc_pmic_bxtwc.o
 obj-$(CONFIG_INTEL_SOC_PMIC_CHTWC)	+= intel_soc_pmic_chtwc.o
 obj-$(CONFIG_INTEL_SOC_PMIC_CHTDC_TI)	+= intel_soc_pmic_chtdc_ti.o
-obj-$(CONFIG_MFD_MT6397)	+= mt6397-core.o
+mt6397-objs	:= mt6397-core.o mt6397-irq.o
+obj-$(CONFIG_MFD_MT6397)	+= mt6397.o
+obj-$(CONFIG_INTEL_SOC_PMIC_MRFLD)	+= intel_soc_pmic_mrfld.o
 
 obj-$(CONFIG_MFD_ALTERA_A10SR)	+= altera-a10sr.o
 obj-$(CONFIG_MFD_ALTERA_SYSMGR) += altera-sysmgr.o
diff --git a/drivers/mfd/ab3100-core.c b/drivers/mfd/ab3100-core.c
index 9f3dbc31d3e9..57723f116bb5 100644
--- a/drivers/mfd/ab3100-core.c
+++ b/drivers/mfd/ab3100-core.c
@@ -865,10 +865,10 @@ static int ab3100_probe(struct i2c_client *client,
 		 &ab3100->chip_name[0]);
 
 	/* Attach a second dummy i2c_client to the test register address */
-	ab3100->testreg_client = i2c_new_dummy(client->adapter,
+	ab3100->testreg_client = i2c_new_dummy_device(client->adapter,
 					       client->addr + 1);
-	if (!ab3100->testreg_client) {
-		err = -ENOMEM;
+	if (IS_ERR(ab3100->testreg_client)) {
+		err = PTR_ERR(ab3100->testreg_client);
 		goto exit_no_testreg_client;
 	}
 
diff --git a/drivers/mfd/ab8500-debugfs.c b/drivers/mfd/ab8500-debugfs.c
index 567a34b073dd..f4e26b6e5362 100644
--- a/drivers/mfd/ab8500-debugfs.c
+++ b/drivers/mfd/ab8500-debugfs.c
@@ -2680,16 +2680,12 @@ static int ab8500_debug_probe(struct platform_device *plf)
 	irq_ab8500 = res->start;
 
 	irq_first = platform_get_irq_byname(plf, "IRQ_FIRST");
-	if (irq_first < 0) {
-		dev_err(&plf->dev, "First irq not found, err %d\n", irq_first);
+	if (irq_first < 0)
 		return irq_first;
-	}
 
 	irq_last = platform_get_irq_byname(plf, "IRQ_LAST");
-	if (irq_last < 0) {
-		dev_err(&plf->dev, "Last irq not found, err %d\n", irq_last);
+	if (irq_last < 0)
 		return irq_last;
-	}
 
 	ab8500_dir = debugfs_create_dir(AB8500_NAME_STRING, NULL);
 
diff --git a/drivers/mfd/asic3.c b/drivers/mfd/asic3.c
index 83b18c998d6f..a6bd2134cea2 100644
--- a/drivers/mfd/asic3.c
+++ b/drivers/mfd/asic3.c
@@ -15,7 +15,7 @@
 #include <linux/kernel.h>
 #include <linux/delay.h>
 #include <linux/irq.h>
-#include <linux/gpio.h>
+#include <linux/gpio/driver.h>
 #include <linux/export.h>
 #include <linux/io.h>
 #include <linux/slab.h>
diff --git a/drivers/mfd/bcm590xx.c b/drivers/mfd/bcm590xx.c
index 1aeb5e498d91..bfac5dc091ca 100644
--- a/drivers/mfd/bcm590xx.c
+++ b/drivers/mfd/bcm590xx.c
@@ -61,11 +61,11 @@ static int bcm590xx_i2c_probe(struct i2c_client *i2c_pri,
 	}
 
 	/* Secondary I2C slave address is the base address with A(2) asserted */
-	bcm590xx->i2c_sec = i2c_new_dummy(i2c_pri->adapter,
+	bcm590xx->i2c_sec = i2c_new_dummy_device(i2c_pri->adapter,
 					  i2c_pri->addr | BIT(2));
-	if (!bcm590xx->i2c_sec) {
+	if (IS_ERR(bcm590xx->i2c_sec)) {
 		dev_err(&i2c_pri->dev, "failed to add secondary I2C device\n");
-		return -ENODEV;
+		return PTR_ERR(bcm590xx->i2c_sec);
 	}
 	i2c_set_clientdata(bcm590xx->i2c_sec, bcm590xx);
 
diff --git a/drivers/mfd/da9150-core.c b/drivers/mfd/da9150-core.c
index 13033068721a..7f0aa1e8db96 100644
--- a/drivers/mfd/da9150-core.c
+++ b/drivers/mfd/da9150-core.c
@@ -420,10 +420,10 @@ static int da9150_probe(struct i2c_client *client,
 	qif_addr = da9150_reg_read(da9150, DA9150_CORE2WIRE_CTRL_A);
 	qif_addr = (qif_addr & DA9150_CORE_BASE_ADDR_MASK) >> 1;
 	qif_addr |= DA9150_QIF_I2C_ADDR_LSB;
-	da9150->core_qif = i2c_new_dummy(client->adapter, qif_addr);
-	if (!da9150->core_qif) {
+	da9150->core_qif = i2c_new_dummy_device(client->adapter, qif_addr);
+	if (IS_ERR(da9150->core_qif)) {
 		dev_err(da9150->dev, "Failed to attach QIF client\n");
-		return -ENODEV;
+		return PTR_ERR(da9150->core_qif);
 	}
 
 	i2c_set_clientdata(da9150->core_qif, da9150);
diff --git a/drivers/mfd/davinci_voicecodec.c b/drivers/mfd/davinci_voicecodec.c
index 13ca7203e193..e5c8bc998eb4 100644
--- a/drivers/mfd/davinci_voicecodec.c
+++ b/drivers/mfd/davinci_voicecodec.c
@@ -19,7 +19,6 @@
 #include <sound/pcm.h>
 
 #include <linux/mfd/davinci_voicecodec.h>
-#include <mach/hardware.h>
 
 static const struct regmap_config davinci_vc_regmap = {
 	.reg_bits = 32,
@@ -31,6 +30,7 @@ static int __init davinci_vc_probe(struct platform_device *pdev)
 	struct davinci_vc *davinci_vc;
 	struct resource *res;
 	struct mfd_cell *cell = NULL;
+	dma_addr_t fifo_base;
 	int ret;
 
 	davinci_vc = devm_kzalloc(&pdev->dev,
@@ -48,6 +48,7 @@ static int __init davinci_vc_probe(struct platform_device *pdev)
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 
+	fifo_base = (dma_addr_t)res->start;
 	davinci_vc->base = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(davinci_vc->base)) {
 		ret = PTR_ERR(davinci_vc->base);
@@ -70,8 +71,7 @@ static int __init davinci_vc_probe(struct platform_device *pdev)
 	}
 
 	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);
+	davinci_vc->davinci_vcif.dma_tx_addr = fifo_base + DAVINCI_VC_WFIFO;
 
 	res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
 	if (!res) {
@@ -81,8 +81,7 @@ static int __init davinci_vc_probe(struct platform_device *pdev)
 	}
 
 	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->davinci_vcif.dma_rx_addr = fifo_base + DAVINCI_VC_RFIFO;
 
 	davinci_vc->dev = &pdev->dev;
 	davinci_vc->pdev = pdev;
diff --git a/drivers/mfd/db8500-prcmu.c b/drivers/mfd/db8500-prcmu.c
index 90e0f21bc49c..0e019cc5da42 100644
--- a/drivers/mfd/db8500-prcmu.c
+++ b/drivers/mfd/db8500-prcmu.c
@@ -1695,21 +1695,41 @@ static long round_clock_rate(u8 clock, unsigned long rate)
 	return rounded_rate;
 }
 
-static const unsigned long armss_freqs[] = {
+static const unsigned long db8500_armss_freqs[] = {
 	200000000,
 	400000000,
 	800000000,
 	998400000
 };
 
+/* The DB8520 has slightly higher ARMSS max frequency */
+static const unsigned long db8520_armss_freqs[] = {
+	200000000,
+	400000000,
+	800000000,
+	1152000000
+};
+
+
+
 static long round_armss_rate(unsigned long rate)
 {
 	unsigned long freq = 0;
+	const unsigned long *freqs;
+	int nfreqs;
 	int i;
 
+	if (fw_info.version.project == PRCMU_FW_PROJECT_U8520) {
+		freqs = db8520_armss_freqs;
+		nfreqs = ARRAY_SIZE(db8520_armss_freqs);
+	} else {
+		freqs = db8500_armss_freqs;
+		nfreqs = ARRAY_SIZE(db8500_armss_freqs);
+	}
+
 	/* Find the corresponding arm opp from the cpufreq table. */
-	for (i = 0; i < ARRAY_SIZE(armss_freqs); i++) {
-		freq = armss_freqs[i];
+	for (i = 0; i < nfreqs; i++) {
+		freq = freqs[i];
 		if (rate <= freq)
 			break;
 	}
@@ -1854,11 +1874,21 @@ static int set_armss_rate(unsigned long rate)
 {
 	unsigned long freq;
 	u8 opps[] = { ARM_EXTCLK, ARM_50_OPP, ARM_100_OPP, ARM_MAX_OPP };
+	const unsigned long *freqs;
+	int nfreqs;
 	int i;
 
+	if (fw_info.version.project == PRCMU_FW_PROJECT_U8520) {
+		freqs = db8520_armss_freqs;
+		nfreqs = ARRAY_SIZE(db8520_armss_freqs);
+	} else {
+		freqs = db8500_armss_freqs;
+		nfreqs = ARRAY_SIZE(db8500_armss_freqs);
+	}
+
 	/* Find the corresponding arm opp from the cpufreq table. */
-	for (i = 0; i < ARRAY_SIZE(armss_freqs); i++) {
-		freq = armss_freqs[i];
+	for (i = 0; i < nfreqs; i++) {
+		freq = freqs[i];
 		if (rate == freq)
 			break;
 	}
@@ -3130,10 +3160,8 @@ static int db8500_prcmu_probe(struct platform_device *pdev)
 	writel(ALL_MBOX_BITS, PRCM_ARM_IT1_CLR);
 
 	irq = platform_get_irq(pdev, 0);
-	if (irq <= 0) {
-		dev_err(&pdev->dev, "no prcmu irq provided\n");
+	if (irq <= 0)
 		return irq;
-	}
 
 	err = request_threaded_irq(irq, prcmu_irq_handler,
 	        prcmu_irq_thread_fn, IRQF_NO_SUSPEND, "prcmu", NULL);
diff --git a/drivers/mfd/ezx-pcap.c b/drivers/mfd/ezx-pcap.c
index f505e3e1274b..70fa18b04ad2 100644
--- a/drivers/mfd/ezx-pcap.c
+++ b/drivers/mfd/ezx-pcap.c
@@ -35,7 +35,7 @@ struct pcap_chip {
 
 	/* IO */
 	u32 buf;
-	struct mutex io_mutex;
+	spinlock_t io_lock;
 
 	/* IRQ */
 	unsigned int irq_base;
@@ -48,7 +48,7 @@ struct pcap_chip {
 	struct pcap_adc_request *adc_queue[PCAP_ADC_MAXQ];
 	u8 adc_head;
 	u8 adc_tail;
-	struct mutex adc_mutex;
+	spinlock_t adc_lock;
 };
 
 /* IO */
@@ -76,14 +76,15 @@ static int ezx_pcap_putget(struct pcap_chip *pcap, u32 *data)
 
 int ezx_pcap_write(struct pcap_chip *pcap, u8 reg_num, u32 value)
 {
+	unsigned long flags;
 	int ret;
 
-	mutex_lock(&pcap->io_mutex);
+	spin_lock_irqsave(&pcap->io_lock, flags);
 	value &= PCAP_REGISTER_VALUE_MASK;
 	value |= PCAP_REGISTER_WRITE_OP_BIT
 		| (reg_num << PCAP_REGISTER_ADDRESS_SHIFT);
 	ret = ezx_pcap_putget(pcap, &value);
-	mutex_unlock(&pcap->io_mutex);
+	spin_unlock_irqrestore(&pcap->io_lock, flags);
 
 	return ret;
 }
@@ -91,14 +92,15 @@ EXPORT_SYMBOL_GPL(ezx_pcap_write);
 
 int ezx_pcap_read(struct pcap_chip *pcap, u8 reg_num, u32 *value)
 {
+	unsigned long flags;
 	int ret;
 
-	mutex_lock(&pcap->io_mutex);
+	spin_lock_irqsave(&pcap->io_lock, flags);
 	*value = PCAP_REGISTER_READ_OP_BIT
 		| (reg_num << PCAP_REGISTER_ADDRESS_SHIFT);
 
 	ret = ezx_pcap_putget(pcap, value);
-	mutex_unlock(&pcap->io_mutex);
+	spin_unlock_irqrestore(&pcap->io_lock, flags);
 
 	return ret;
 }
@@ -106,11 +108,12 @@ EXPORT_SYMBOL_GPL(ezx_pcap_read);
 
 int ezx_pcap_set_bits(struct pcap_chip *pcap, u8 reg_num, u32 mask, u32 val)
 {
+	unsigned long flags;
 	int ret;
 	u32 tmp = PCAP_REGISTER_READ_OP_BIT |
 		(reg_num << PCAP_REGISTER_ADDRESS_SHIFT);
 
-	mutex_lock(&pcap->io_mutex);
+	spin_lock_irqsave(&pcap->io_lock, flags);
 	ret = ezx_pcap_putget(pcap, &tmp);
 	if (ret)
 		goto out_unlock;
@@ -121,7 +124,7 @@ int ezx_pcap_set_bits(struct pcap_chip *pcap, u8 reg_num, u32 mask, u32 val)
 
 	ret = ezx_pcap_putget(pcap, &tmp);
 out_unlock:
-	mutex_unlock(&pcap->io_mutex);
+	spin_unlock_irqrestore(&pcap->io_lock, flags);
 
 	return ret;
 }
@@ -212,14 +215,15 @@ static void pcap_irq_handler(struct irq_desc *desc)
 /* ADC */
 void pcap_set_ts_bits(struct pcap_chip *pcap, u32 bits)
 {
+	unsigned long flags;
 	u32 tmp;
 
-	mutex_lock(&pcap->adc_mutex);
+	spin_lock_irqsave(&pcap->adc_lock, flags);
 	ezx_pcap_read(pcap, PCAP_REG_ADC, &tmp);
 	tmp &= ~(PCAP_ADC_TS_M_MASK | PCAP_ADC_TS_REF_LOWPWR);
 	tmp |= bits & (PCAP_ADC_TS_M_MASK | PCAP_ADC_TS_REF_LOWPWR);
 	ezx_pcap_write(pcap, PCAP_REG_ADC, tmp);
-	mutex_unlock(&pcap->adc_mutex);
+	spin_unlock_irqrestore(&pcap->adc_lock, flags);
 }
 EXPORT_SYMBOL_GPL(pcap_set_ts_bits);
 
@@ -234,15 +238,16 @@ static void pcap_disable_adc(struct pcap_chip *pcap)
 
 static void pcap_adc_trigger(struct pcap_chip *pcap)
 {
+	unsigned long flags;
 	u32 tmp;
 	u8 head;
 
-	mutex_lock(&pcap->adc_mutex);
+	spin_lock_irqsave(&pcap->adc_lock, flags);
 	head = pcap->adc_head;
 	if (!pcap->adc_queue[head]) {
 		/* queue is empty, save power */
 		pcap_disable_adc(pcap);
-		mutex_unlock(&pcap->adc_mutex);
+		spin_unlock_irqrestore(&pcap->adc_lock, flags);
 		return;
 	}
 	/* start conversion on requested bank, save TS_M bits */
@@ -254,7 +259,7 @@ static void pcap_adc_trigger(struct pcap_chip *pcap)
 		tmp |= PCAP_ADC_AD_SEL1;
 
 	ezx_pcap_write(pcap, PCAP_REG_ADC, tmp);
-	mutex_unlock(&pcap->adc_mutex);
+	spin_unlock_irqrestore(&pcap->adc_lock, flags);
 	ezx_pcap_write(pcap, PCAP_REG_ADR, PCAP_ADR_ASC);
 }
 
@@ -265,11 +270,11 @@ static irqreturn_t pcap_adc_irq(int irq, void *_pcap)
 	u16 res[2];
 	u32 tmp;
 
-	mutex_lock(&pcap->adc_mutex);
+	spin_lock(&pcap->adc_lock);
 	req = pcap->adc_queue[pcap->adc_head];
 
 	if (WARN(!req, "adc irq without pending request\n")) {
-		mutex_unlock(&pcap->adc_mutex);
+		spin_unlock(&pcap->adc_lock);
 		return IRQ_HANDLED;
 	}
 
@@ -285,7 +290,7 @@ static irqreturn_t pcap_adc_irq(int irq, void *_pcap)
 
 	pcap->adc_queue[pcap->adc_head] = NULL;
 	pcap->adc_head = (pcap->adc_head + 1) & (PCAP_ADC_MAXQ - 1);
-	mutex_unlock(&pcap->adc_mutex);
+	spin_unlock(&pcap->adc_lock);
 
 	/* pass the results and release memory */
 	req->callback(req->data, res);
@@ -301,6 +306,7 @@ int pcap_adc_async(struct pcap_chip *pcap, u8 bank, u32 flags, u8 ch[],
 						void *callback, void *data)
 {
 	struct pcap_adc_request *req;
+	unsigned long irq_flags;
 
 	/* This will be freed after we have a result *