Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 846 insertions, 0 deletions

diff --git a/drivers/mfd/twl6040.c b/drivers/mfd/twl6040.c
new file mode 100644
index 000000000..f429b8f00
--- /dev/null
+++ b/drivers/mfd/twl6040.c
@@ -0,0 +1,846 @@
+// 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/of_irq.h>
+#include <linux/of_gpio.h>
+#include <linux/of_platform.h>
+#include <linux/gpio.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 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;
+
+	gpio_set_value(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");
+			gpio_set_value(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 (gpio_is_valid(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 (gpio_is_valid(twl6040->audpwron)) {
+			/* use AUDPWRON line */
+			gpio_set_value(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_RBTREE,
+	.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 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,
+			 const struct i2c_device_id *id)
+{
+	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 = of_get_named_gpio(node,
+						      "ti,audpwron-gpio", 0);
+	else
+		twl6040->audpwron = -EINVAL;
+
+	if (gpio_is_valid(twl6040->audpwron)) {
+		ret = devm_gpio_request_one(&client->dev, twl6040->audpwron,
+					    GPIOF_OUT_INIT_LOW, "audpwron");
+		if (ret)
+			goto gpio_err;
+
+		/* 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", 0, },
+	{ "twl6041", 0, },
+	{ },
+};
+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>");
+MODULE_LICENSE("GPL");