Merge tag 'trace-v7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-tracegrafted

Pull tracing fixes from Steven Rostedt:

 - Fix error output of boot instance creation failure

   Currently if a boot instance creation fails, instead of printing out
   the name of the instance that failed, it prints "(null)". That is
   because it prints "cur_str" that had already been processed by
   strsep(). Print the saved name instead.

   While at it, print the error code of the failure.

 - Fix use-after-free for same named historgrams

   Histograms can be named so that they can be used in multiple events.
   But if the named histogram has a variable attached, the second event
   that uses the named histogram which duplicates it and needs to free
   the original after duplication leaves the old variable in place and
   still visible. If another histogram uses than variable, it will use
   the stale one which will try to reference the freed duplicate
   histogram and crash the kernel.

   Free the duplicate variables along with the duplicated histogram
   data.

 - Check return value of kthread_run() in event self test

   The events self tests uses a kthread for testing but does not check
   if it succeeded in creating a kthread. If the kthread creation were
   to fail, the code will still try to call kthread_stop() on the error
   returned.

 - Fix race between reading trace_pipe and updating subbuffer size

   If a user is reading the trace_pipe file at the same time they update
   the ring buffer sub-buffer size, can cause the trace_pipe read to
   read stale data. Add trace_access_lock() around updating the ring
   buffer sub-buffer size.

 - Fix eventfs_inode on failure path in creation of the events directory

   In the creation of the "events" directory, if after allocating the
   eventfs_inode a failure is detected, it calls cleanup_ei() which
   calls free_ei(). The free_ei() will test if eventfs_inode being freed
   has no children. It is a bug if it does. But on the failure case of
   the creation of the "events" directory, the children lists have not
   yet been initialized and the free will trigger a warning because
   list_empty() on an uninitialized list returns false.

   Move the initialization into init_ei() where it makes more sense and
   makes sure that a created eventfs_inode has its lists initialized
   upon creation.

 - Check return value of kthread_run() in ftrace direct sample code

   The sample code that shows how to use the ftrace direct calls does
   not test the return of kthread_run() to see if it succeeds. Return a
   failure if the kthread_run() doesn't succeed.

 - Clear user events state on fork in case of alloc failure

   On fork, the child gets a pointer to the parent's user events state.
   It makes a copy of it then updates the child's pointer to it. But if
   the allocation fails, the duplication function leaves the child with
   a pointer to its parent's descriptor. When the child cleans up its
   data, it will free the parent's descriptor while the parent is still
   using it.

   In the duplication function, set the child's user_event_mm to NULL
   before testing if the allocation succeeded, and when it exits it will
   not free the parent's descriptor.

 - Fix retry exhaustion in simple ring buffer reader swap

   simple_ring_buffer_swap_reader_page() starts with retry set to 8 and
   post-decrements it only after a failed link replacement. On the final
   attempt, a successful replacement leaves retry at zero, while a
   failed replacement leaves it at -1.

   But the check for success expects the retry value to be non-zero and
   exits with an error on zero. This is the opposite result. Fix it.

 - Fail nicely when the remote swap_reader_page() returns an error

   Currently, if the swap_reader_page() of a remote buffer fails, it
   triggers a WARN_ON_ONCE() and continues normally. Instead, have it
   exit with an error and a pr_warn() print instead of a full WARNING.

* tag 'trace-v7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
  ring-buffer: Stop remote reader update when page swap fails
  tracing: Fix retry exhaustion in simple ring buffer reader swap
  tracing/user_events: Clear copied tracing state before fork duplication
  samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-multi-modify
  samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-modify
  eventfs: Initialize ei->children and ei->list in init_ei()
  tracing: Fix use-after-free in trace_pipe read on sub-buffer order change
  tracing: Fix crash passing ERR_PTR to kthread_stop()
  tracing: Fix use-after-free with same-name named triggers
  tracing: Fix logged instance name on creation failure

1 files changed, 839 insertions, 0 deletions

diff --git a/drivers/mfd/twl6040.c b/drivers/mfd/twl6040.c
new file mode 100644
index 000000000..562a0f939
--- /dev/null
+++ b/drivers/mfd/twl6040.c
@@ -0,0 +1,839 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * MFD driver for TWL6040 audio device
+ *
+ * Authors:	Misael Lopez Cruz <misael.lopez@ti.com>
+ *		Jorge Eduardo Candelaria <jorge.candelaria@ti.com>
+ *		Peter Ujfalusi <peter.ujfalusi@ti.com>
+ *
+ * Copyright:	(C) 2011 Texas Instruments, Inc.
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/kernel.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+#include <linux/of.h>
+#include <linux/gpio/consumer.h>
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/regmap.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/twl6040.h>
+#include <linux/regulator/consumer.h>
+
+#define VIBRACTRL_MEMBER(reg) ((reg == TWL6040_REG_VIBCTLL) ? 0 : 1)
+#define TWL6040_NUM_SUPPLIES	(2)
+
+static const struct reg_default twl6040_defaults[] = {
+	{ 0x01, 0x4B }, /* REG_ASICID	(ro) */
+	{ 0x02, 0x00 }, /* REG_ASICREV	(ro) */
+	{ 0x03, 0x00 }, /* REG_INTID	*/
+	{ 0x04, 0x00 }, /* REG_INTMR	*/
+	{ 0x05, 0x00 }, /* REG_NCPCTRL	*/
+	{ 0x06, 0x00 }, /* REG_LDOCTL	*/
+	{ 0x07, 0x60 }, /* REG_HPPLLCTL	*/
+	{ 0x08, 0x00 }, /* REG_LPPLLCTL	*/
+	{ 0x09, 0x4A }, /* REG_LPPLLDIV	*/
+	{ 0x0A, 0x00 }, /* REG_AMICBCTL	*/
+	{ 0x0B, 0x00 }, /* REG_DMICBCTL	*/
+	{ 0x0C, 0x00 }, /* REG_MICLCTL	*/
+	{ 0x0D, 0x00 }, /* REG_MICRCTL	*/
+	{ 0x0E, 0x00 }, /* REG_MICGAIN	*/
+	{ 0x0F, 0x1B }, /* REG_LINEGAIN	*/
+	{ 0x10, 0x00 }, /* REG_HSLCTL	*/
+	{ 0x11, 0x00 }, /* REG_HSRCTL	*/
+	{ 0x12, 0x00 }, /* REG_HSGAIN	*/
+	{ 0x13, 0x00 }, /* REG_EARCTL	*/
+	{ 0x14, 0x00 }, /* REG_HFLCTL	*/
+	{ 0x15, 0x00 }, /* REG_HFLGAIN	*/
+	{ 0x16, 0x00 }, /* REG_HFRCTL	*/
+	{ 0x17, 0x00 }, /* REG_HFRGAIN	*/
+	{ 0x18, 0x00 }, /* REG_VIBCTLL	*/
+	{ 0x19, 0x00 }, /* REG_VIBDATL	*/
+	{ 0x1A, 0x00 }, /* REG_VIBCTLR	*/
+	{ 0x1B, 0x00 }, /* REG_VIBDATR	*/
+	{ 0x1C, 0x00 }, /* REG_HKCTL1	*/
+	{ 0x1D, 0x00 }, /* REG_HKCTL2	*/
+	{ 0x1E, 0x00 }, /* REG_GPOCTL	*/
+	{ 0x1F, 0x00 }, /* REG_ALB	*/
+	{ 0x20, 0x00 }, /* REG_DLB	*/
+	/* 0x28, REG_TRIM1 */
+	/* 0x29, REG_TRIM2 */
+	/* 0x2A, REG_TRIM3 */
+	/* 0x2B, REG_HSOTRIM */
+	/* 0x2C, REG_HFOTRIM */
+	{ 0x2D, 0x08 }, /* REG_ACCCTL	*/
+	{ 0x2E, 0x00 }, /* REG_STATUS	(ro) */
+};
+
+static const struct reg_sequence twl6040_patch[] = {
+	/*
+	 * Select I2C bus access to dual access registers
+	 * Interrupt register is cleared on read
+	 * Select fast mode for i2c (400KHz)
+	 */
+	{ TWL6040_REG_ACCCTL,
+		TWL6040_I2CSEL | TWL6040_INTCLRMODE | TWL6040_I2CMODE(1) },
+};
+
+
+static bool twl6040_has_vibra(struct device_node *parent)
+{
+	struct device_node *node;
+
+	node = of_get_child_by_name(parent, "vibra");
+	if (node) {
+		of_node_put(node);
+		return true;
+	}
+
+	return false;
+}
+
+int twl6040_reg_read(struct twl6040 *twl6040, unsigned int reg)
+{
+	int ret;
+	unsigned int val;
+
+	ret = regmap_read(twl6040->regmap, reg, &val);
+	if (ret < 0)
+		return ret;
+
+	return val;
+}
+EXPORT_SYMBOL(twl6040_reg_read);
+
+int twl6040_reg_write(struct twl6040 *twl6040, unsigned int reg, u8 val)
+{
+	int ret;
+
+	ret = regmap_write(twl6040->regmap, reg, val);
+
+	return ret;
+}
+EXPORT_SYMBOL(twl6040_reg_write);
+
+int twl6040_set_bits(struct twl6040 *twl6040, unsigned int reg, u8 mask)
+{
+	return regmap_update_bits(twl6040->regmap, reg, mask, mask);
+}
+EXPORT_SYMBOL(twl6040_set_bits);
+
+int twl6040_clear_bits(struct twl6040 *twl6040, unsigned int reg, u8 mask)
+{
+	return regmap_update_bits(twl6040->regmap, reg, mask, 0);
+}
+EXPORT_SYMBOL(twl6040_clear_bits);
+
+/* twl6040 codec manual power-up sequence */
+static int twl6040_power_up_manual(struct twl6040 *twl6040)
+{
+	u8 ldoctl, ncpctl, lppllctl;
+	int ret;
+
+	/* enable high-side LDO, reference system and internal oscillator */
+	ldoctl = TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA;
+	ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
+	if (ret)
+		return ret;
+	usleep_range(10000, 10500);
+
+	/* enable negative charge pump */
+	ncpctl = TWL6040_NCPENA;
+	ret = twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
+	if (ret)
+		goto ncp_err;
+	usleep_range(1000, 1500);
+
+	/* enable low-side LDO */
+	ldoctl |= TWL6040_LSLDOENA;
+	ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
+	if (ret)
+		goto lsldo_err;
+	usleep_range(1000, 1500);
+
+	/* enable low-power PLL */
+	lppllctl = TWL6040_LPLLENA;
+	ret = twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
+	if (ret)
+		goto lppll_err;
+	usleep_range(5000, 5500);
+
+	/* disable internal oscillator */
+	ldoctl &= ~TWL6040_OSCENA;
+	ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
+	if (ret)
+		goto osc_err;
+
+	return 0;
+
+osc_err:
+	lppllctl &= ~TWL6040_LPLLENA;
+	twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
+lppll_err:
+	ldoctl &= ~TWL6040_LSLDOENA;
+	twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
+lsldo_err:
+	ncpctl &= ~TWL6040_NCPENA;
+	twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
+ncp_err:
+	ldoctl &= ~(TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA);
+	twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
+
+	dev_err(twl6040->dev, "manual power-up failed\n");
+	return ret;
+}
+
+/* twl6040 manual power-down sequence */
+static void twl6040_power_down_manual(struct twl6040 *twl6040)
+{
+	u8 ncpctl, ldoctl, lppllctl;
+
+	ncpctl = twl6040_reg_read(twl6040, TWL6040_REG_NCPCTL);
+	ldoctl = twl6040_reg_read(twl6040, TWL6040_REG_LDOCTL);
+	lppllctl = twl6040_reg_read(twl6040, TWL6040_REG_LPPLLCTL);
+
+	/* enable internal oscillator */
+	ldoctl |= TWL6040_OSCENA;
+	twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
+	usleep_range(1000, 1500);
+
+	/* disable low-power PLL */
+	lppllctl &= ~TWL6040_LPLLENA;
+	twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
+
+	/* disable low-side LDO */
+	ldoctl &= ~TWL6040_LSLDOENA;
+	twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
+
+	/* disable negative charge pump */
+	ncpctl &= ~TWL6040_NCPENA;
+	twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
+
+	/* disable high-side LDO, reference system and internal oscillator */
+	ldoctl &= ~(TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA);
+	twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
+}
+
+static irqreturn_t twl6040_readyint_handler(int irq, void *data)
+{
+	struct twl6040 *twl6040 = data;
+
+	complete(&twl6040->ready);
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t twl6040_thint_handler(int irq, void *data)
+{
+	struct twl6040 *twl6040 = data;
+	u8 status;
+
+	status = twl6040_reg_read(twl6040, TWL6040_REG_STATUS);
+	if (status & TWL6040_TSHUTDET) {
+		dev_warn(twl6040->dev, "Thermal shutdown, powering-off");
+		twl6040_power(twl6040, 0);
+	} else {
+		dev_warn(twl6040->dev, "Leaving thermal shutdown, powering-on");
+		twl6040_power(twl6040, 1);
+	}
+
+	return IRQ_HANDLED;
+}
+
+static int twl6040_power_up_automatic(struct twl6040 *twl6040)
+{
+	int time_left;
+
+	gpiod_set_value_cansleep(twl6040->audpwron, 1);
+
+	time_left = wait_for_completion_timeout(&twl6040->ready,
+						msecs_to_jiffies(144));
+	if (!time_left) {
+		u8 intid;
+
+		dev_warn(twl6040->dev, "timeout waiting for READYINT\n");
+		intid = twl6040_reg_read(twl6040, TWL6040_REG_INTID);
+		if (!(intid & TWL6040_READYINT)) {
+			dev_err(twl6040->dev, "automatic power-up failed\n");
+			gpiod_set_value_cansleep(twl6040->audpwron, 0);
+			return -ETIMEDOUT;
+		}
+	}
+
+	return 0;
+}
+
+int twl6040_power(struct twl6040 *twl6040, int on)
+{
+	int ret = 0;
+
+	mutex_lock(&twl6040->mutex);
+
+	if (on) {
+		/* already powered-up */
+		if (twl6040->power_count++)
+			goto out;
+
+		ret = clk_prepare_enable(twl6040->clk32k);
+		if (ret) {
+			twl6040->power_count = 0;
+			goto out;
+		}
+
+		/* Allow writes to the chip */
+		regcache_cache_only(twl6040->regmap, false);
+
+		if (twl6040->audpwron) {
+			/* use automatic power-up sequence */
+			ret = twl6040_power_up_automatic(twl6040);
+			if (ret) {
+				clk_disable_unprepare(twl6040->clk32k);
+				twl6040->power_count = 0;
+				goto out;
+			}
+		} else {
+			/* use manual power-up sequence */
+			ret = twl6040_power_up_manual(twl6040);
+			if (ret) {
+				clk_disable_unprepare(twl6040->clk32k);
+				twl6040->power_count = 0;
+				goto out;
+			}
+		}
+
+		/*
+		 * Register access can produce errors after power-up unless we
+		 * wait at least 8ms based on measurements on duovero.
+		 */
+		usleep_range(10000, 12000);
+
+		/* Sync with the HW */
+		ret = regcache_sync(twl6040->regmap);
+		if (ret) {
+			dev_err(twl6040->dev, "Failed to sync with the HW: %i\n",
+				ret);
+			goto out;
+		}
+
+		/* Default PLL configuration after power up */
+		twl6040->pll = TWL6040_SYSCLK_SEL_LPPLL;
+		twl6040->sysclk_rate = 19200000;
+	} else {
+		/* already powered-down */
+		if (!twl6040->power_count) {
+			dev_err(twl6040->dev,
+				"device is already powered-off\n");
+			ret = -EPERM;
+			goto out;
+		}
+
+		if (--twl6040->power_count)
+			goto out;
+
+		if (twl6040->audpwron) {
+			/* use AUDPWRON line */
+			gpiod_set_value_cansleep(twl6040->audpwron, 0);
+
+			/* power-down sequence latency */
+			usleep_range(500, 700);
+		} else {
+			/* use manual power-down sequence */
+			twl6040_power_down_manual(twl6040);
+		}
+
+		/* Set regmap to cache only and mark it as dirty */
+		regcache_cache_only(twl6040->regmap, true);
+		regcache_mark_dirty(twl6040->regmap);
+
+		twl6040->sysclk_rate = 0;
+
+		if (twl6040->pll == TWL6040_SYSCLK_SEL_HPPLL) {
+			clk_disable_unprepare(twl6040->mclk);
+			twl6040->mclk_rate = 0;
+		}
+
+		clk_disable_unprepare(twl6040->clk32k);
+	}
+
+out:
+	mutex_unlock(&twl6040->mutex);
+	return ret;
+}
+EXPORT_SYMBOL(twl6040_power);
+
+int twl6040_set_pll(struct twl6040 *twl6040, int pll_id,
+		    unsigned int freq_in, unsigned int freq_out)
+{
+	u8 hppllctl, lppllctl;
+	int ret = 0;
+
+	mutex_lock(&twl6040->mutex);
+
+	hppllctl = twl6040_reg_read(twl6040, TWL6040_REG_HPPLLCTL);
+	lppllctl = twl6040_reg_read(twl6040, TWL6040_REG_LPPLLCTL);
+
+	/* Force full reconfiguration when switching between PLL */
+	if (pll_id != twl6040->pll) {
+		twl6040->sysclk_rate = 0;
+		twl6040->mclk_rate = 0;
+	}
+
+	switch (pll_id) {
+	case TWL6040_SYSCLK_SEL_LPPLL:
+		/* low-power PLL divider */
+		/* Change the sysclk configuration only if it has been canged */
+		if (twl6040->sysclk_rate != freq_out) {
+			switch (freq_out) {
+			case 17640000:
+				lppllctl |= TWL6040_LPLLFIN;
+				break;
+			case 19200000:
+				lppllctl &= ~TWL6040_LPLLFIN;
+				break;
+			default:
+				dev_err(twl6040->dev,
+					"freq_out %d not supported\n",
+					freq_out);
+				ret = -EINVAL;
+				goto pll_out;
+			}
+			twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
+					  lppllctl);
+		}
+
+		/* The PLL in use has not been change, we can exit */
+		if (twl6040->pll == pll_id)
+			break;
+
+		switch (freq_in) {
+		case 32768:
+			lppllctl |= TWL6040_LPLLENA;
+			twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
+					  lppllctl);
+			mdelay(5);
+			lppllctl &= ~TWL6040_HPLLSEL;
+			twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
+					  lppllctl);
+			hppllctl &= ~TWL6040_HPLLENA;
+			twl6040_reg_write(twl6040, TWL6040_REG_HPPLLCTL,
+					  hppllctl);
+			break;
+		default:
+			dev_err(twl6040->dev,
+				"freq_in %d not supported\n", freq_in);
+			ret = -EINVAL;
+			goto pll_out;
+		}
+
+		clk_disable_unprepare(twl6040->mclk);
+		break;
+	case TWL6040_SYSCLK_SEL_HPPLL:
+		/* high-performance PLL can provide only 19.2 MHz */
+		if (freq_out != 19200000) {
+			dev_err(twl6040->dev,
+				"freq_out %d not supported\n", freq_out);
+			ret = -EINVAL;
+			goto pll_out;
+		}
+
+		if (twl6040->mclk_rate != freq_in) {
+			hppllctl &= ~TWL6040_MCLK_MSK;
+
+			switch (freq_in) {
+			case 12000000:
+				/* PLL enabled, active mode */
+				hppllctl |= TWL6040_MCLK_12000KHZ |
+					    TWL6040_HPLLENA;
+				break;
+			case 19200000:
+				/* PLL enabled, bypass mode */
+				hppllctl |= TWL6040_MCLK_19200KHZ |
+					    TWL6040_HPLLBP | TWL6040_HPLLENA;
+				break;
+			case 26000000:
+				/* PLL enabled, active mode */
+				hppllctl |= TWL6040_MCLK_26000KHZ |
+					    TWL6040_HPLLENA;
+				break;
+			case 38400000:
+				/* PLL enabled, bypass mode */
+				hppllctl |= TWL6040_MCLK_38400KHZ |
+					    TWL6040_HPLLBP | TWL6040_HPLLENA;
+				break;
+			default:
+				dev_err(twl6040->dev,
+					"freq_in %d not supported\n", freq_in);
+				ret = -EINVAL;
+				goto pll_out;
+			}
+
+			/* When switching to HPPLL, enable the mclk first */
+			if (pll_id != twl6040->pll)
+				clk_prepare_enable(twl6040->mclk);
+			/*
+			 * enable clock slicer to ensure input waveform is
+			 * square
+			 */
+			hppllctl |= TWL6040_HPLLSQRENA;
+
+			twl6040_reg_write(twl6040, TWL6040_REG_HPPLLCTL,
+					  hppllctl);
+			usleep_range(500, 700);
+			lppllctl |= TWL6040_HPLLSEL;
+			twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
+					  lppllctl);
+			lppllctl &= ~TWL6040_LPLLENA;
+			twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
+					  lppllctl);
+
+			twl6040->mclk_rate = freq_in;
+		}
+		break;
+	default:
+		dev_err(twl6040->dev, "unknown pll id %d\n", pll_id);
+		ret = -EINVAL;
+		goto pll_out;
+	}
+
+	twl6040->sysclk_rate = freq_out;
+	twl6040->pll = pll_id;
+
+pll_out:
+	mutex_unlock(&twl6040->mutex);
+	return ret;
+}
+EXPORT_SYMBOL(twl6040_set_pll);
+
+int twl6040_get_pll(struct twl6040 *twl6040)
+{
+	if (twl6040->power_count)
+		return twl6040->pll;
+	else
+		return -ENODEV;
+}
+EXPORT_SYMBOL(twl6040_get_pll);
+
+unsigned int twl6040_get_sysclk(struct twl6040 *twl6040)
+{
+	return twl6040->sysclk_rate;
+}
+EXPORT_SYMBOL(twl6040_get_sysclk);
+
+/* Get the combined status of the vibra control register */
+int twl6040_get_vibralr_status(struct twl6040 *twl6040)
+{
+	unsigned int reg;
+	int ret;
+	u8 status;
+
+	ret = regmap_read(twl6040->regmap, TWL6040_REG_VIBCTLL, &reg);
+	if (ret != 0)
+		return ret;
+	status = reg;
+
+	ret = regmap_read(twl6040->regmap, TWL6040_REG_VIBCTLR, &reg);
+	if (ret != 0)
+		return ret;
+	status |= reg;
+
+	status &= (TWL6040_VIBENA | TWL6040_VIBSEL);
+
+	return status;
+}
+EXPORT_SYMBOL(twl6040_get_vibralr_status);
+
+static struct resource twl6040_vibra_rsrc[] = {
+	{
+		.flags = IORESOURCE_IRQ,
+	},
+};
+
+static struct resource twl6040_codec_rsrc[] = {
+	{
+		.flags = IORESOURCE_IRQ,
+	},
+};
+
+static bool twl6040_readable_reg(struct device *dev, unsigned int reg)
+{
+	/* Register 0 is not readable */
+	if (!reg)
+		return false;
+	return true;
+}
+
+static bool twl6040_volatile_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case TWL6040_REG_ASICID:
+	case TWL6040_REG_ASICREV:
+	case TWL6040_REG_INTID:
+	case TWL6040_REG_LPPLLCTL:
+	case TWL6040_REG_HPPLLCTL:
+	case TWL6040_REG_STATUS:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static bool twl6040_writeable_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case TWL6040_REG_ASICID:
+	case TWL6040_REG_ASICREV:
+	case TWL6040_REG_STATUS:
+		return false;
+	default:
+		return true;
+	}
+}
+
+static const struct regmap_config twl6040_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+
+	.reg_defaults = twl6040_defaults,
+	.num_reg_defaults = ARRAY_SIZE(twl6040_defaults),
+
+	.max_register = TWL6040_REG_STATUS, /* 0x2e */
+
+	.readable_reg = twl6040_readable_reg,
+	.volatile_reg = twl6040_volatile_reg,
+	.writeable_reg = twl6040_writeable_reg,
+
+	.cache_type = REGCACHE_MAPLE,
+	.use_single_read = true,
+	.use_single_write = true,
+};
+
+static const struct regmap_irq twl6040_irqs[] = {
+	{ .reg_offset = 0, .mask = TWL6040_THINT, },
+	{ .reg_offset = 0, .mask = TWL6040_PLUGINT | TWL6040_UNPLUGINT, },
+	{ .reg_offset = 0, .mask = TWL6040_HOOKINT, },
+	{ .reg_offset = 0, .mask = TWL6040_HFINT, },
+	{ .reg_offset = 0, .mask = TWL6040_VIBINT, },
+	{ .reg_offset = 0, .mask = TWL6040_READYINT, },
+};
+
+static const struct regmap_irq_chip twl6040_irq_chip = {
+	.name = "twl6040",
+	.irqs = twl6040_irqs,
+	.num_irqs = ARRAY_SIZE(twl6040_irqs),
+
+	.num_regs = 1,
+	.status_base = TWL6040_REG_INTID,
+	.mask_base = TWL6040_REG_INTMR,
+};
+
+static int twl6040_probe(struct i2c_client *client)
+{
+	struct device_node *node = client->dev.of_node;
+	struct twl6040 *twl6040;
+	struct mfd_cell *cell = NULL;
+	int irq, ret, children = 0;
+
+	if (!node) {
+		dev_err(&client->dev, "of node is missing\n");
+		return -EINVAL;
+	}
+
+	/* In order to operate correctly we need valid interrupt config */
+	if (!client->irq) {
+		dev_err(&client->dev, "Invalid IRQ configuration\n");
+		return -EINVAL;
+	}
+
+	twl6040 = devm_kzalloc(&client->dev, sizeof(struct twl6040),
+			       GFP_KERNEL);
+	if (!twl6040)
+		return -ENOMEM;
+
+	twl6040->regmap = devm_regmap_init_i2c(client, &twl6040_regmap_config);
+	if (IS_ERR(twl6040->regmap))
+		return PTR_ERR(twl6040->regmap);
+
+	i2c_set_clientdata(client, twl6040);
+
+	twl6040->clk32k = devm_clk_get(&client->dev, "clk32k");
+	if (IS_ERR(twl6040->clk32k)) {
+		if (PTR_ERR(twl6040->clk32k) == -EPROBE_DEFER)
+			return -EPROBE_DEFER;
+		dev_dbg(&client->dev, "clk32k is not handled\n");
+		twl6040->clk32k = NULL;
+	}
+
+	twl6040->mclk = devm_clk_get(&client->dev, "mclk");
+	if (IS_ERR(twl6040->mclk)) {
+		if (PTR_ERR(twl6040->mclk) == -EPROBE_DEFER)
+			return -EPROBE_DEFER;
+		dev_dbg(&client->dev, "mclk is not handled\n");
+		twl6040->mclk = NULL;
+	}
+
+	twl6040->supplies[0].supply = "vio";
+	twl6040->supplies[1].supply = "v2v1";
+	ret = devm_regulator_bulk_get(&client->dev, TWL6040_NUM_SUPPLIES,
+				      twl6040->supplies);
+	if (ret != 0) {
+		dev_err(&client->dev, "Failed to get supplies: %d\n", ret);
+		return ret;
+	}
+
+	ret = regulator_bulk_enable(TWL6040_NUM_SUPPLIES, twl6040->supplies);
+	if (ret != 0) {
+		dev_err(&client->dev, "Failed to enable supplies: %d\n", ret);
+		return ret;
+	}
+
+	twl6040->dev = &client->dev;
+	twl6040->irq = client->irq;
+
+	mutex_init(&twl6040->mutex);
+	init_completion(&twl6040->ready);
+
+	regmap_register_patch(twl6040->regmap, twl6040_patch,
+			      ARRAY_SIZE(twl6040_patch));
+
+	twl6040->rev = twl6040_reg_read(twl6040, TWL6040_REG_ASICREV);
+	if (twl6040->rev < 0) {
+		dev_err(&client->dev, "Failed to read revision register: %d\n",
+			twl6040->rev);
+		ret = twl6040->rev;
+		goto gpio_err;
+	}
+
+	/* ERRATA: Automatic power-up is not possible in ES1.0 */
+	if (twl6040_get_revid(twl6040) > TWL6040_REV_ES1_0) {
+		twl6040->audpwron = devm_gpiod_get_optional(&client->dev,
+							    "ti,audpwron",
+							    GPIOD_OUT_LOW);
+		ret = PTR_ERR_OR_ZERO(twl6040->audpwron);
+		if (ret)
+			goto gpio_err;
+
+		gpiod_set_consumer_name(twl6040->audpwron, "audpwron");
+
+		/* Clear any pending interrupt */
+		twl6040_reg_read(twl6040, TWL6040_REG_INTID);
+	}
+
+	ret = regmap_add_irq_chip(twl6040->regmap, twl6040->irq, IRQF_ONESHOT,
+				  0, &twl6040_irq_chip, &twl6040->irq_data);
+	if (ret < 0)
+		goto gpio_err;
+
+	twl6040->irq_ready = regmap_irq_get_virq(twl6040->irq_data,
+						 TWL6040_IRQ_READY);
+	twl6040->irq_th = regmap_irq_get_virq(twl6040->irq_data,
+					      TWL6040_IRQ_TH);
+
+	ret = devm_request_threaded_irq(twl6040->dev, twl6040->irq_ready, NULL,
+					twl6040_readyint_handler, IRQF_ONESHOT,
+					"twl6040_irq_ready", twl6040);
+	if (ret) {
+		dev_err(twl6040->dev, "READY IRQ request failed: %d\n", ret);
+		goto readyirq_err;
+	}
+
+	ret = devm_request_threaded_irq(twl6040->dev, twl6040->irq_th, NULL,
+					twl6040_thint_handler, IRQF_ONESHOT,
+					"twl6040_irq_th", twl6040);
+	if (ret) {
+		dev_err(twl6040->dev, "Thermal IRQ request failed: %d\n", ret);
+		goto readyirq_err;
+	}
+
+	/*
+	 * The main functionality of twl6040 to provide audio on OMAP4+ systems.
+	 * We can add the ASoC codec child whenever this driver has been loaded.
+	 */
+	irq = regmap_irq_get_virq(twl6040->irq_data, TWL6040_IRQ_PLUG);
+	cell = &twl6040->cells[children];
+	cell->name = "twl6040-codec";
+	twl6040_codec_rsrc[0].start = irq;
+	twl6040_codec_rsrc[0].end = irq;
+	cell->resources = twl6040_codec_rsrc;
+	cell->num_resources = ARRAY_SIZE(twl6040_codec_rsrc);
+	children++;
+
+	/* Vibra input driver support */
+	if (twl6040_has_vibra(node)) {
+		irq = regmap_irq_get_virq(twl6040->irq_data, TWL6040_IRQ_VIB);
+
+		cell = &twl6040->cells[children];
+		cell->name = "twl6040-vibra";
+		twl6040_vibra_rsrc[0].start = irq;
+		twl6040_vibra_rsrc[0].end = irq;
+		cell->resources = twl6040_vibra_rsrc;
+		cell->num_resources = ARRAY_SIZE(twl6040_vibra_rsrc);
+		children++;
+	}
+
+	/* GPO support */
+	cell = &twl6040->cells[children];
+	cell->name = "twl6040-gpo";
+	children++;
+
+	/* PDM clock support  */
+	cell = &twl6040->cells[children];
+	cell->name = "twl6040-pdmclk";
+	children++;
+
+	/* The chip is powered down so mark regmap to cache only and dirty */
+	regcache_cache_only(twl6040->regmap, true);
+	regcache_mark_dirty(twl6040->regmap);
+
+	ret = mfd_add_devices(&client->dev, -1, twl6040->cells, children,
+			      NULL, 0, NULL);
+	if (ret)
+		goto readyirq_err;
+
+	return 0;
+
+readyirq_err:
+	regmap_del_irq_chip(twl6040->irq, twl6040->irq_data);
+gpio_err:
+	regulator_bulk_disable(TWL6040_NUM_SUPPLIES, twl6040->supplies);
+	return ret;
+}
+
+static void twl6040_remove(struct i2c_client *client)
+{
+	struct twl6040 *twl6040 = i2c_get_clientdata(client);
+
+	if (twl6040->power_count)
+		twl6040_power(twl6040, 0);
+
+	regmap_del_irq_chip(twl6040->irq, twl6040->irq_data);
+
+	mfd_remove_devices(&client->dev);
+
+	regulator_bulk_disable(TWL6040_NUM_SUPPLIES, twl6040->supplies);
+}
+
+static const struct i2c_device_id twl6040_i2c_id[] = {
+	{ "twl6040" },
+	{ "twl6041" },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, twl6040_i2c_id);
+
+static struct i2c_driver twl6040_driver = {
+	.driver = {
+		.name = "twl6040",
+	},
+	.probe		= twl6040_probe,
+	.remove		= twl6040_remove,
+	.id_table	= twl6040_i2c_id,
+};
+
+module_i2c_driver(twl6040_driver);
+
+MODULE_DESCRIPTION("TWL6040 MFD");
+MODULE_AUTHOR("Misael Lopez Cruz <misael.lopez@ti.com>");
+MODULE_AUTHOR("Jorge Eduardo Candelaria <jorge.candelaria@ti.com>");