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linux_old1/drivers/mfd/twl4030-core.c

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/*
* twl4030_core.c - driver for TWL4030/TPS659x0 PM and audio CODEC devices
*
* Copyright (C) 2005-2006 Texas Instruments, Inc.
*
* Modifications to defer interrupt handling to a kernel thread:
* Copyright (C) 2006 MontaVista Software, Inc.
*
* Based on tlv320aic23.c:
* Copyright (c) by Kai Svahn <kai.svahn@nokia.com>
*
* Code cleanup and modifications to IRQ handler.
* by syed khasim <x0khasim@ti.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/init.h>
#include <linux/mutex.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/regulator/machine.h>
#include <linux/i2c.h>
#include <linux/i2c/twl4030.h>
#if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
#include <plat/cpu.h>
#endif
/*
* The TWL4030 "Triton 2" is one of a family of a multi-function "Power
* Management and System Companion Device" chips originally designed for
* use in OMAP2 and OMAP 3 based systems. Its control interfaces use I2C,
* often at around 3 Mbit/sec, including for interrupt handling.
*
* This driver core provides genirq support for the interrupts emitted,
* by the various modules, and exports register access primitives.
*
* FIXME this driver currently requires use of the first interrupt line
* (and associated registers).
*/
#define DRIVER_NAME "twl4030"
#if defined(CONFIG_TWL4030_BCI_BATTERY) || \
defined(CONFIG_TWL4030_BCI_BATTERY_MODULE)
#define twl_has_bci() true
#else
#define twl_has_bci() false
#endif
#if defined(CONFIG_KEYBOARD_TWL4030) || defined(CONFIG_KEYBOARD_TWL4030_MODULE)
#define twl_has_keypad() true
#else
#define twl_has_keypad() false
#endif
#if defined(CONFIG_GPIO_TWL4030) || defined(CONFIG_GPIO_TWL4030_MODULE)
#define twl_has_gpio() true
#else
#define twl_has_gpio() false
#endif
#if defined(CONFIG_REGULATOR_TWL4030) \
|| defined(CONFIG_REGULATOR_TWL4030_MODULE)
#define twl_has_regulator() true
#else
#define twl_has_regulator() false
#endif
#if defined(CONFIG_TWL4030_MADC) || defined(CONFIG_TWL4030_MADC_MODULE)
#define twl_has_madc() true
#else
#define twl_has_madc() false
#endif
#ifdef CONFIG_TWL4030_POWER
#define twl_has_power() true
#else
#define twl_has_power() false
#endif
#if defined(CONFIG_RTC_DRV_TWL4030) || defined(CONFIG_RTC_DRV_TWL4030_MODULE)
#define twl_has_rtc() true
#else
#define twl_has_rtc() false
#endif
#if defined(CONFIG_TWL4030_USB) || defined(CONFIG_TWL4030_USB_MODULE)
#define twl_has_usb() true
#else
#define twl_has_usb() false
#endif
#if defined(CONFIG_TWL4030_WATCHDOG) || \
defined(CONFIG_TWL4030_WATCHDOG_MODULE)
#define twl_has_watchdog() true
#else
#define twl_has_watchdog() false
#endif
#if defined(CONFIG_TWL4030_CODEC) || defined(CONFIG_TWL4030_CODEC_MODULE)
#define twl_has_codec() true
#else
#define twl_has_codec() false
#endif
/* Triton Core internal information (BEGIN) */
/* Last - for index max*/
#define TWL4030_MODULE_LAST TWL4030_MODULE_SECURED_REG
#define TWL4030_NUM_SLAVES 4
#if defined(CONFIG_INPUT_TWL4030_PWRBUTTON) \
|| defined(CONFIG_INPUT_TWL4030_PWBUTTON_MODULE)
#define twl_has_pwrbutton() true
#else
#define twl_has_pwrbutton() false
#endif
/* Base Address defns for twl4030_map[] */
/* subchip/slave 0 - USB ID */
#define TWL4030_BASEADD_USB 0x0000
/* subchip/slave 1 - AUD ID */
#define TWL4030_BASEADD_AUDIO_VOICE 0x0000
#define TWL4030_BASEADD_GPIO 0x0098
#define TWL4030_BASEADD_INTBR 0x0085
#define TWL4030_BASEADD_PIH 0x0080
#define TWL4030_BASEADD_TEST 0x004C
/* subchip/slave 2 - AUX ID */
#define TWL4030_BASEADD_INTERRUPTS 0x00B9
#define TWL4030_BASEADD_LED 0x00EE
#define TWL4030_BASEADD_MADC 0x0000
#define TWL4030_BASEADD_MAIN_CHARGE 0x0074
#define TWL4030_BASEADD_PRECHARGE 0x00AA
#define TWL4030_BASEADD_PWM0 0x00F8
#define TWL4030_BASEADD_PWM1 0x00FB
#define TWL4030_BASEADD_PWMA 0x00EF
#define TWL4030_BASEADD_PWMB 0x00F1
#define TWL4030_BASEADD_KEYPAD 0x00D2
/* subchip/slave 3 - POWER ID */
#define TWL4030_BASEADD_BACKUP 0x0014
#define TWL4030_BASEADD_INT 0x002E
#define TWL4030_BASEADD_PM_MASTER 0x0036
#define TWL4030_BASEADD_PM_RECEIVER 0x005B
#define TWL4030_BASEADD_RTC 0x001C
#define TWL4030_BASEADD_SECURED_REG 0x0000
/* Triton Core internal information (END) */
/* Few power values */
#define R_CFG_BOOT 0x05
#define R_PROTECT_KEY 0x0E
/* access control values for R_PROTECT_KEY */
#define KEY_UNLOCK1 0xce
#define KEY_UNLOCK2 0xec
#define KEY_LOCK 0x00
/* some fields in R_CFG_BOOT */
#define HFCLK_FREQ_19p2_MHZ (1 << 0)
#define HFCLK_FREQ_26_MHZ (2 << 0)
#define HFCLK_FREQ_38p4_MHZ (3 << 0)
#define HIGH_PERF_SQ (1 << 3)
/* chip-specific feature flags, for i2c_device_id.driver_data */
#define TWL4030_VAUX2 BIT(0) /* pre-5030 voltage ranges */
#define TPS_SUBSET BIT(1) /* tps659[23]0 have fewer LDOs */
/*----------------------------------------------------------------------*/
/* is driver active, bound to a chip? */
static bool inuse;
/* Structure for each TWL4030 Slave */
struct twl4030_client {
struct i2c_client *client;
u8 address;
/* max numb of i2c_msg required is for read =2 */
struct i2c_msg xfer_msg[2];
/* To lock access to xfer_msg */
struct mutex xfer_lock;
};
static struct twl4030_client twl4030_modules[TWL4030_NUM_SLAVES];
/* mapping the module id to slave id and base address */
struct twl4030mapping {
unsigned char sid; /* Slave ID */
unsigned char base; /* base address */
};
static struct twl4030mapping twl4030_map[TWL4030_MODULE_LAST + 1] = {
/*
* NOTE: don't change this table without updating the
* <linux/i2c/twl4030.h> defines for TWL4030_MODULE_*
* so they continue to match the order in this table.
*/
{ 0, TWL4030_BASEADD_USB },
{ 1, TWL4030_BASEADD_AUDIO_VOICE },
{ 1, TWL4030_BASEADD_GPIO },
{ 1, TWL4030_BASEADD_INTBR },
{ 1, TWL4030_BASEADD_PIH },
{ 1, TWL4030_BASEADD_TEST },
{ 2, TWL4030_BASEADD_KEYPAD },
{ 2, TWL4030_BASEADD_MADC },
{ 2, TWL4030_BASEADD_INTERRUPTS },
{ 2, TWL4030_BASEADD_LED },
{ 2, TWL4030_BASEADD_MAIN_CHARGE },
{ 2, TWL4030_BASEADD_PRECHARGE },
{ 2, TWL4030_BASEADD_PWM0 },
{ 2, TWL4030_BASEADD_PWM1 },
{ 2, TWL4030_BASEADD_PWMA },
{ 2, TWL4030_BASEADD_PWMB },
{ 3, TWL4030_BASEADD_BACKUP },
{ 3, TWL4030_BASEADD_INT },
{ 3, TWL4030_BASEADD_PM_MASTER },
{ 3, TWL4030_BASEADD_PM_RECEIVER },
{ 3, TWL4030_BASEADD_RTC },
{ 3, TWL4030_BASEADD_SECURED_REG },
};
/*----------------------------------------------------------------------*/
/* Exported Functions */
/**
* twl4030_i2c_write - Writes a n bit register in TWL4030
* @mod_no: module number
* @value: an array of num_bytes+1 containing data to write
* @reg: register address (just offset will do)
* @num_bytes: number of bytes to transfer
*
* IMPORTANT: for 'value' parameter: Allocate value num_bytes+1 and
* valid data starts at Offset 1.
*
* Returns the result of operation - 0 is success
*/
int twl4030_i2c_write(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
{
int ret;
int sid;
struct twl4030_client *twl;
struct i2c_msg *msg;
if (unlikely(mod_no > TWL4030_MODULE_LAST)) {
pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
return -EPERM;
}
sid = twl4030_map[mod_no].sid;
twl = &twl4030_modules[sid];
if (unlikely(!inuse)) {
pr_err("%s: client %d is not initialized\n", DRIVER_NAME, sid);
return -EPERM;
}
mutex_lock(&twl->xfer_lock);
/*
* [MSG1]: fill the register address data
* fill the data Tx buffer
*/
msg = &twl->xfer_msg[0];
msg->addr = twl->address;
msg->len = num_bytes + 1;
msg->flags = 0;
msg->buf = value;
/* over write the first byte of buffer with the register address */
*value = twl4030_map[mod_no].base + reg;
ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 1);
mutex_unlock(&twl->xfer_lock);
/* i2cTransfer returns num messages.translate it pls.. */
if (ret >= 0)
ret = 0;
return ret;
}
EXPORT_SYMBOL(twl4030_i2c_write);
/**
* twl4030_i2c_read - Reads a n bit register in TWL4030
* @mod_no: module number
* @value: an array of num_bytes containing data to be read
* @reg: register address (just offset will do)
* @num_bytes: number of bytes to transfer
*
* Returns result of operation - num_bytes is success else failure.
*/
int twl4030_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
{
int ret;
u8 val;
int sid;
struct twl4030_client *twl;
struct i2c_msg *msg;
if (unlikely(mod_no > TWL4030_MODULE_LAST)) {
pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
return -EPERM;
}
sid = twl4030_map[mod_no].sid;
twl = &twl4030_modules[sid];
if (unlikely(!inuse)) {
pr_err("%s: client %d is not initialized\n", DRIVER_NAME, sid);
return -EPERM;
}
mutex_lock(&twl->xfer_lock);
/* [MSG1] fill the register address data */
msg = &twl->xfer_msg[0];
msg->addr = twl->address;
msg->len = 1;
msg->flags = 0; /* Read the register value */
val = twl4030_map[mod_no].base + reg;
msg->buf = &val;
/* [MSG2] fill the data rx buffer */
msg = &twl->xfer_msg[1];
msg->addr = twl->address;
msg->flags = I2C_M_RD; /* Read the register value */
msg->len = num_bytes; /* only n bytes */
msg->buf = value;
ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 2);
mutex_unlock(&twl->xfer_lock);
/* i2cTransfer returns num messages.translate it pls.. */
if (ret >= 0)
ret = 0;
return ret;
}
EXPORT_SYMBOL(twl4030_i2c_read);
/**
* twl4030_i2c_write_u8 - Writes a 8 bit register in TWL4030
* @mod_no: module number
* @value: the value to be written 8 bit
* @reg: register address (just offset will do)
*
* Returns result of operation - 0 is success
*/
int twl4030_i2c_write_u8(u8 mod_no, u8 value, u8 reg)
{
/* 2 bytes offset 1 contains the data offset 0 is used by i2c_write */
u8 temp_buffer[2] = { 0 };
/* offset 1 contains the data */
temp_buffer[1] = value;
return twl4030_i2c_write(mod_no, temp_buffer, reg, 1);
}
EXPORT_SYMBOL(twl4030_i2c_write_u8);
/**
* twl4030_i2c_read_u8 - Reads a 8 bit register from TWL4030
* @mod_no: module number
* @value: the value read 8 bit
* @reg: register address (just offset will do)
*
* Returns result of operation - 0 is success
*/
int twl4030_i2c_read_u8(u8 mod_no, u8 *value, u8 reg)
{
return twl4030_i2c_read(mod_no, value, reg, 1);
}
EXPORT_SYMBOL(twl4030_i2c_read_u8);
/*----------------------------------------------------------------------*/
static struct device *
add_numbered_child(unsigned chip, const char *name, int num,
void *pdata, unsigned pdata_len,
bool can_wakeup, int irq0, int irq1)
{
struct platform_device *pdev;
struct twl4030_client *twl = &twl4030_modules[chip];
int status;
pdev = platform_device_alloc(name, num);
if (!pdev) {
dev_dbg(&twl->client->dev, "can't alloc dev\n");
status = -ENOMEM;
goto err;
}
device_init_wakeup(&pdev->dev, can_wakeup);
pdev->dev.parent = &twl->client->dev;
if (pdata) {
status = platform_device_add_data(pdev, pdata, pdata_len);
if (status < 0) {
dev_dbg(&pdev->dev, "can't add platform_data\n");
goto err;
}
}
if (irq0) {
struct resource r[2] = {
{ .start = irq0, .flags = IORESOURCE_IRQ, },
{ .start = irq1, .flags = IORESOURCE_IRQ, },
};
status = platform_device_add_resources(pdev, r, irq1 ? 2 : 1);
if (status < 0) {
dev_dbg(&pdev->dev, "can't add irqs\n");
goto err;
}
}
status = platform_device_add(pdev);
err:
if (status < 0) {
platform_device_put(pdev);
dev_err(&twl->client->dev, "can't add %s dev\n", name);
return ERR_PTR(status);
}
return &pdev->dev;
}
static inline struct device *add_child(unsigned chip, const char *name,
void *pdata, unsigned pdata_len,
bool can_wakeup, int irq0, int irq1)
{
return add_numbered_child(chip, name, -1, pdata, pdata_len,
can_wakeup, irq0, irq1);
}
static struct device *
add_regulator_linked(int num, struct regulator_init_data *pdata,
struct regulator_consumer_supply *consumers,
unsigned num_consumers)
{
/* regulator framework demands init_data ... */
if (!pdata)
return NULL;
if (consumers) {
pdata->consumer_supplies = consumers;
pdata->num_consumer_supplies = num_consumers;
}
/* NOTE: we currently ignore regulator IRQs, e.g. for short circuits */
return add_numbered_child(3, "twl4030_reg", num,
pdata, sizeof(*pdata), false, 0, 0);
}
static struct device *
add_regulator(int num, struct regulator_init_data *pdata)
{
return add_regulator_linked(num, pdata, NULL, 0);
}
/*
* NOTE: We know the first 8 IRQs after pdata->base_irq are
* for the PIH, and the next are for the PWR_INT SIH, since
* that's how twl_init_irq() sets things up.
*/
static int
add_children(struct twl4030_platform_data *pdata, unsigned long features)
{
struct device *child;
if (twl_has_bci() && pdata->bci && !(features & TPS_SUBSET)) {
child = add_child(3, "twl4030_bci",
pdata->bci, sizeof(*pdata->bci),
false,
/* irq0 = CHG_PRES, irq1 = BCI */
pdata->irq_base + 8 + 1, pdata->irq_base + 2);
if (IS_ERR(child))
return PTR_ERR(child);
}
if (twl_has_gpio() && pdata->gpio) {
child = add_child(1, "twl4030_gpio",
pdata->gpio, sizeof(*pdata->gpio),
false, pdata->irq_base + 0, 0);
if (IS_ERR(child))
return PTR_ERR(child);
}
if (twl_has_keypad() && pdata->keypad) {
child = add_child(2, "twl4030_keypad",
pdata->keypad, sizeof(*pdata->keypad),
true, pdata->irq_base + 1, 0);
if (IS_ERR(child))
return PTR_ERR(child);
}
if (twl_has_madc() && pdata->madc) {
child = add_child(2, "twl4030_madc",
pdata->madc, sizeof(*pdata->madc),
true, pdata->irq_base + 3, 0);
if (IS_ERR(child))
return PTR_ERR(child);
}
if (twl_has_rtc()) {
/*
* REVISIT platform_data here currently might expose the
* "msecure" line ... but for now we just expect board
* setup to tell the chip "it's always ok to SET_TIME".
* Eventually, Linux might become more aware of such
* HW security concerns, and "least privilege".
*/
child = add_child(3, "twl4030_rtc",
NULL, 0,
true, pdata->irq_base + 8 + 3, 0);
if (IS_ERR(child))
return PTR_ERR(child);
}
if (twl_has_usb() && pdata->usb) {
static struct regulator_consumer_supply usb1v5 = {
.supply = "usb1v5",
};
static struct regulator_consumer_supply usb1v8 = {
.supply = "usb1v8",
};
static struct regulator_consumer_supply usb3v1 = {
.supply = "usb3v1",
};
/* First add the regulators so that they can be used by transceiver */
if (twl_has_regulator()) {
/* this is a template that gets copied */
struct regulator_init_data usb_fixed = {
.constraints.valid_modes_mask =
REGULATOR_MODE_NORMAL
| REGULATOR_MODE_STANDBY,
.constraints.valid_ops_mask =
REGULATOR_CHANGE_MODE
| REGULATOR_CHANGE_STATUS,
};
child = add_regulator_linked(TWL4030_REG_VUSB1V5,
&usb_fixed, &usb1v5, 1);
if (IS_ERR(child))
return PTR_ERR(child);
child = add_regulator_linked(TWL4030_REG_VUSB1V8,
&usb_fixed, &usb1v8, 1);
if (IS_ERR(child))
return PTR_ERR(child);
child = add_regulator_linked(TWL4030_REG_VUSB3V1,
&usb_fixed, &usb3v1, 1);
if (IS_ERR(child))
return PTR_ERR(child);
}
child = add_child(0, "twl4030_usb",
pdata->usb, sizeof(*pdata->usb),
true,
/* irq0 = USB_PRES, irq1 = USB */
pdata->irq_base + 8 + 2, pdata->irq_base + 4);
if (IS_ERR(child))
return PTR_ERR(child);
/* we need to connect regulators to this transceiver */
if (twl_has_regulator() && child) {
usb1v5.dev = child;
usb1v8.dev = child;
usb3v1.dev = child;
}
}
if (twl_has_watchdog()) {
child = add_child(0, "twl4030_wdt", NULL, 0, false, 0, 0);
if (IS_ERR(child))
return PTR_ERR(child);
}
if (twl_has_pwrbutton()) {
child = add_child(1, "twl4030_pwrbutton",
NULL, 0, true, pdata->irq_base + 8 + 0, 0);
if (IS_ERR(child))
return PTR_ERR(child);
}
if (twl_has_codec() && pdata->codec) {
child = add_child(1, "twl4030_codec",
pdata->codec, sizeof(*pdata->codec),
false, 0, 0);
if (IS_ERR(child))
return PTR_ERR(child);
}
if (twl_has_regulator()) {
/*
child = add_regulator(TWL4030_REG_VPLL1, pdata->vpll1);
if (IS_ERR(child))
return PTR_ERR(child);
*/
child = add_regulator(TWL4030_REG_VMMC1, pdata->vmmc1);
if (IS_ERR(child))
return PTR_ERR(child);
child = add_regulator(TWL4030_REG_VDAC, pdata->vdac);
if (IS_ERR(child))
return PTR_ERR(child);
child = add_regulator((features & TWL4030_VAUX2)
? TWL4030_REG_VAUX2_4030
: TWL4030_REG_VAUX2,
pdata->vaux2);
if (IS_ERR(child))
return PTR_ERR(child);
}
/* maybe add LDOs that are omitted on cost-reduced parts */
if (twl_has_regulator() && !(features & TPS_SUBSET)) {
child = add_regulator(TWL4030_REG_VPLL2, pdata->vpll2);
if (IS_ERR(child))
return PTR_ERR(child);
child = add_regulator(TWL4030_REG_VMMC2, pdata->vmmc2);
if (IS_ERR(child))
return PTR_ERR(child);
child = add_regulator(TWL4030_REG_VSIM, pdata->vsim);
if (IS_ERR(child))
return PTR_ERR(child);
child = add_regulator(TWL4030_REG_VAUX1, pdata->vaux1);
if (IS_ERR(child))
return PTR_ERR(child);
child = add_regulator(TWL4030_REG_VAUX3, pdata->vaux3);
if (IS_ERR(child))
return PTR_ERR(child);
child = add_regulator(TWL4030_REG_VAUX4, pdata->vaux4);
if (IS_ERR(child))
return PTR_ERR(child);
}
return 0;
}
/*----------------------------------------------------------------------*/
/*
* These three functions initialize the on-chip clock framework,
* letting it generate the right frequencies for USB, MADC, and
* other purposes.
*/
static inline int __init protect_pm_master(void)
{
int e = 0;
e = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, KEY_LOCK,
R_PROTECT_KEY);
return e;
}
static inline int __init unprotect_pm_master(void)
{
int e = 0;
e |= twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, KEY_UNLOCK1,
R_PROTECT_KEY);
e |= twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, KEY_UNLOCK2,
R_PROTECT_KEY);
return e;
}
static void clocks_init(struct device *dev)
{
int e = 0;
struct clk *osc;
u32 rate;
u8 ctrl = HFCLK_FREQ_26_MHZ;
#if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
if (cpu_is_omap2430())
osc = clk_get(dev, "osc_ck");
else
osc = clk_get(dev, "osc_sys_ck");
if (IS_ERR(osc)) {
printk(KERN_WARNING "Skipping twl4030 internal clock init and "
"using bootloader value (unknown osc rate)\n");
return;
}
rate = clk_get_rate(osc);
clk_put(osc);
#else
/* REVISIT for non-OMAP systems, pass the clock rate from
* board init code, using platform_data.
*/
osc = ERR_PTR(-EIO);
printk(KERN_WARNING "Skipping twl4030 internal clock init and "
"using bootloader value (unknown osc rate)\n");
return;
#endif
switch (rate) {
case 19200000:
ctrl = HFCLK_FREQ_19p2_MHZ;
break;
case 26000000:
ctrl = HFCLK_FREQ_26_MHZ;
break;
case 38400000:
ctrl = HFCLK_FREQ_38p4_MHZ;
break;
}
ctrl |= HIGH_PERF_SQ;
e |= unprotect_pm_master();
/* effect->MADC+USB ck en */
e |= twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, ctrl, R_CFG_BOOT);
e |= protect_pm_master();
if (e < 0)
pr_err("%s: clock init err [%d]\n", DRIVER_NAME, e);
}
/*----------------------------------------------------------------------*/
int twl_init_irq(int irq_num, unsigned irq_base, unsigned irq_end);
int twl_exit_irq(void);
static int twl4030_remove(struct i2c_client *client)
{
unsigned i;
int status;
status = twl_exit_irq();
if (status < 0)
return status;
for (i = 0; i < TWL4030_NUM_SLAVES; i++) {
struct twl4030_client *twl = &twl4030_modules[i];
if (twl->client && twl->client != client)
i2c_unregister_device(twl->client);
twl4030_modules[i].client = NULL;
}
inuse = false;
return 0;
}
/* NOTE: this driver only handles a single twl4030/tps659x0 chip */
static int __init
twl4030_probe(struct i2c_client *client, const struct i2c_device_id *id)
{
int status;
unsigned i;
struct twl4030_platform_data *pdata = client->dev.platform_data;
if (!pdata) {
dev_dbg(&client->dev, "no platform data?\n");
return -EINVAL;
}
if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) == 0) {
dev_dbg(&client->dev, "can't talk I2C?\n");
return -EIO;
}
if (inuse) {
dev_dbg(&client->dev, "driver is already in use\n");
return -EBUSY;
}
for (i = 0; i < TWL4030_NUM_SLAVES; i++) {
struct twl4030_client *twl = &twl4030_modules[i];
twl->address = client->addr + i;
if (i == 0)
twl->client = client;
else {
twl->client = i2c_new_dummy(client->adapter,
twl->address);
if (!twl->client) {
dev_err(&client->dev,
"can't attach client %d\n", i);
status = -ENOMEM;
goto fail;
}
strlcpy(twl->client->name, id->name,
sizeof(twl->client->name));
}
mutex_init(&twl->xfer_lock);
}
inuse = true;
/* setup clock framework */
clocks_init(&client->dev);
/* load power event scripts */
if (twl_has_power() && pdata->power)
twl4030_power_init(pdata->power);
/* Maybe init the T2 Interrupt subsystem */
if (client->irq
&& pdata->irq_base
&& pdata->irq_end > pdata->irq_base) {
status = twl_init_irq(client->irq, pdata->irq_base, pdata->irq_end);
if (status < 0)
goto fail;
}
status = add_children(pdata, id->driver_data);
fail:
if (status < 0)
twl4030_remove(client);
return status;
}
static const struct i2c_device_id twl4030_ids[] = {
{ "twl4030", TWL4030_VAUX2 }, /* "Triton 2" */
{ "twl5030", 0 }, /* T2 updated */
{ "tps65950", 0 }, /* catalog version of twl5030 */
{ "tps65930", TPS_SUBSET }, /* fewer LDOs and DACs; no charger */
{ "tps65920", TPS_SUBSET }, /* fewer LDOs; no codec or charger */
{ /* end of list */ },
};
MODULE_DEVICE_TABLE(i2c, twl4030_ids);
/* One Client Driver , 4 Clients */
static struct i2c_driver twl4030_driver = {
.driver.name = DRIVER_NAME,
.id_table = twl4030_ids,
.probe = twl4030_probe,
.remove = twl4030_remove,
};
static int __init twl4030_init(void)
{
return i2c_add_driver(&twl4030_driver);
}
subsys_initcall(twl4030_init);
static void __exit twl4030_exit(void)
{
i2c_del_driver(&twl4030_driver);
}
module_exit(twl4030_exit);
MODULE_AUTHOR("Texas Instruments, Inc.");
MODULE_DESCRIPTION("I2C Core interface for TWL4030");
MODULE_LICENSE("GPL");
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