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linux/drivers/mfd/twl6040.c
Johan Hovold 85e9b13cbb mfd: twl6040: Fix child-node lookup 
Fix child-node lookup during probe, which ended up searching the whole
device tree depth-first starting at the parent rather than just matching
on its children.

To make things worse, the parent node was prematurely freed, while the
child node was leaked.

Note that the CONFIG_OF compile guard can be removed as
of_get_child_by_name() provides a !CONFIG_OF implementation which always
fails.

Cc: stable <stable@vger.kernel.org>     # 3.5
Fixes: 37e13cecaa ("mfd: Add support for Device Tree to twl6040")
Fixes: ca2cad6ae3 ("mfd: Fix twl6040 build failure")
Signed-off-by: Johan Hovold <johan@kernel.org>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
2017-11-29 16:29:36 +00:00

851 lines
21 KiB
C
Raw Blame History

/*
* 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.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
*/
#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;
}
}
/* Sync with the HW */
regcache_sync(twl6040->regmap);
/* 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_rw = 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 int 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);
return 0;
}
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");
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