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linux/drivers/mfd/twl-core.c
Andreas Kemnade ca9414a1d0 mfd: twl-core: Add power off implementation for twl603x 
If the system-power-controller property is there, enable power off.
Implementation is based on a Linux v3.0 vendor kernel.

Signed-off-by: Andreas Kemnade <andreas@kemnade.info>
Link: https://lore.kernel.org/r/20240217082007.3238948-3-andreas@kemnade.info
Signed-off-by: Lee Jones <lee@kernel.org>
2024-02-23 16:11:39 +00:00

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* twl_core.c - driver for TWL4030/TWL5030/TWL60X0/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>
*/
#include <linux/init.h>
#include <linux/mutex.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/device.h>
#include <linux/of.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/irq.h>
#include <linux/irqdomain.h>
#include <linux/regulator/machine.h>
#include <linux/i2c.h>
#include <linux/mfd/core.h>
#include <linux/mfd/twl.h>
/* Register descriptions for audio */
#include <linux/mfd/twl4030-audio.h>
#include "twl-core.h"
/*
* 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 "twl"
/* Triton Core internal information (BEGIN) */
/* 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_PWM 0x00F8
#define TWL4030_BASEADD_KEYPAD 0x00D2
#define TWL5031_BASEADD_ACCESSORY 0x0074 /* Replaces Main Charge */
#define TWL5031_BASEADD_INTERRUPTS 0x00B9 /* Different than TWL4030's
one */
/* 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_DCDC_GLOBAL_CFG 0x06
#define SMARTREFLEX_ENABLE BIT(3)
#define TWL4030_BASEADD_RTC 0x001C
#define TWL4030_BASEADD_SECURED_REG 0x0000
/* Triton Core internal information (END) */
/* subchip/slave 0 0x48 - POWER */
#define TWL6030_BASEADD_RTC 0x0000
#define TWL6030_BASEADD_SECURED_REG 0x0017
#define TWL6030_BASEADD_PM_MASTER 0x001F
#define TWL6030_BASEADD_PM_SLAVE_MISC 0x0030 /* PM_RECEIVER */
#define TWL6030_BASEADD_PM_MISC 0x00E2
#define TWL6030_BASEADD_PM_PUPD 0x00F0
/* subchip/slave 1 0x49 - FEATURE */
#define TWL6030_BASEADD_USB 0x0000
#define TWL6030_BASEADD_GPADC_CTRL 0x002E
#define TWL6030_BASEADD_AUX 0x0090
#define TWL6030_BASEADD_PWM 0x00BA
#define TWL6030_BASEADD_GASGAUGE 0x00C0
#define TWL6030_BASEADD_PIH 0x00D0
#define TWL6032_BASEADD_CHARGER 0x00DA
#define TWL6030_BASEADD_CHARGER 0x00E0
#define TWL6030_BASEADD_LED 0x00F4
/* subchip/slave 2 0x4A - DFT */
#define TWL6030_BASEADD_DIEID 0x00C0
/* subchip/slave 3 0x4B - AUDIO */
#define TWL6030_BASEADD_AUDIO 0x0000
#define TWL6030_BASEADD_RSV 0x0000
#define TWL6030_BASEADD_ZERO 0x0000
/* Some fields in TWL6030_PHOENIX_DEV_ON */
#define TWL6030_APP_DEVOFF BIT(0)
#define TWL6030_CON_DEVOFF BIT(1)
#define TWL6030_MOD_DEVOFF BIT(2)
/* Few power values */
#define R_CFG_BOOT 0x05
/* 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)
#define CK32K_LOWPWR_EN (1 << 7)
/*----------------------------------------------------------------------*/
/* Structure for each TWL4030/TWL6030 Slave */
struct twl_client {
struct i2c_client *client;
struct regmap *regmap;
};
/* mapping the module id to slave id and base address */
struct twl_mapping {
unsigned char sid; /* Slave ID */
unsigned char base; /* base address */
};
struct twl_private {
bool ready; /* The core driver is ready to be used */
u32 twl_idcode; /* TWL IDCODE Register value */
unsigned int twl_id;
struct twl_mapping *twl_map;
struct twl_client *twl_modules;
};
static struct twl_private *twl_priv;
static struct twl_mapping twl4030_map[] = {
/*
* NOTE: don't change this table without updating the
* <linux/mfd/twl.h> defines for TWL4030_MODULE_*
* so they continue to match the order in this table.
*/
/* Common IPs */
{ 0, TWL4030_BASEADD_USB },
{ 1, TWL4030_BASEADD_PIH },
{ 2, TWL4030_BASEADD_MAIN_CHARGE },
{ 3, TWL4030_BASEADD_PM_MASTER },
{ 3, TWL4030_BASEADD_PM_RECEIVER },
{ 3, TWL4030_BASEADD_RTC },
{ 2, TWL4030_BASEADD_PWM },
{ 2, TWL4030_BASEADD_LED },
{ 3, TWL4030_BASEADD_SECURED_REG },
/* TWL4030 specific IPs */
{ 1, TWL4030_BASEADD_AUDIO_VOICE },
{ 1, TWL4030_BASEADD_GPIO },
{ 1, TWL4030_BASEADD_INTBR },
{ 1, TWL4030_BASEADD_TEST },
{ 2, TWL4030_BASEADD_KEYPAD },
{ 2, TWL4030_BASEADD_MADC },
{ 2, TWL4030_BASEADD_INTERRUPTS },
{ 2, TWL4030_BASEADD_PRECHARGE },
{ 3, TWL4030_BASEADD_BACKUP },
{ 3, TWL4030_BASEADD_INT },
{ 2, TWL5031_BASEADD_ACCESSORY },
{ 2, TWL5031_BASEADD_INTERRUPTS },
};
static const struct reg_default twl4030_49_defaults[] = {
/* Audio Registers */
{ 0x01, 0x00}, /* CODEC_MODE */
{ 0x02, 0x00}, /* OPTION */
/* 0x03 Unused */
{ 0x04, 0x00}, /* MICBIAS_CTL */
{ 0x05, 0x00}, /* ANAMICL */
{ 0x06, 0x00}, /* ANAMICR */
{ 0x07, 0x00}, /* AVADC_CTL */
{ 0x08, 0x00}, /* ADCMICSEL */
{ 0x09, 0x00}, /* DIGMIXING */
{ 0x0a, 0x0f}, /* ATXL1PGA */
{ 0x0b, 0x0f}, /* ATXR1PGA */
{ 0x0c, 0x0f}, /* AVTXL2PGA */
{ 0x0d, 0x0f}, /* AVTXR2PGA */
{ 0x0e, 0x00}, /* AUDIO_IF */
{ 0x0f, 0x00}, /* VOICE_IF */
{ 0x10, 0x3f}, /* ARXR1PGA */
{ 0x11, 0x3f}, /* ARXL1PGA */
{ 0x12, 0x3f}, /* ARXR2PGA */
{ 0x13, 0x3f}, /* ARXL2PGA */
{ 0x14, 0x25}, /* VRXPGA */
{ 0x15, 0x00}, /* VSTPGA */
{ 0x16, 0x00}, /* VRX2ARXPGA */
{ 0x17, 0x00}, /* AVDAC_CTL */
{ 0x18, 0x00}, /* ARX2VTXPGA */
{ 0x19, 0x32}, /* ARXL1_APGA_CTL*/
{ 0x1a, 0x32}, /* ARXR1_APGA_CTL*/
{ 0x1b, 0x32}, /* ARXL2_APGA_CTL*/
{ 0x1c, 0x32}, /* ARXR2_APGA_CTL*/
{ 0x1d, 0x00}, /* ATX2ARXPGA */
{ 0x1e, 0x00}, /* BT_IF */
{ 0x1f, 0x55}, /* BTPGA */
{ 0x20, 0x00}, /* BTSTPGA */
{ 0x21, 0x00}, /* EAR_CTL */
{ 0x22, 0x00}, /* HS_SEL */
{ 0x23, 0x00}, /* HS_GAIN_SET */
{ 0x24, 0x00}, /* HS_POPN_SET */
{ 0x25, 0x00}, /* PREDL_CTL */
{ 0x26, 0x00}, /* PREDR_CTL */
{ 0x27, 0x00}, /* PRECKL_CTL */
{ 0x28, 0x00}, /* PRECKR_CTL */
{ 0x29, 0x00}, /* HFL_CTL */
{ 0x2a, 0x00}, /* HFR_CTL */
{ 0x2b, 0x05}, /* ALC_CTL */
{ 0x2c, 0x00}, /* ALC_SET1 */
{ 0x2d, 0x00}, /* ALC_SET2 */
{ 0x2e, 0x00}, /* BOOST_CTL */
{ 0x2f, 0x00}, /* SOFTVOL_CTL */
{ 0x30, 0x13}, /* DTMF_FREQSEL */
{ 0x31, 0x00}, /* DTMF_TONEXT1H */
{ 0x32, 0x00}, /* DTMF_TONEXT1L */
{ 0x33, 0x00}, /* DTMF_TONEXT2H */
{ 0x34, 0x00}, /* DTMF_TONEXT2L */
{ 0x35, 0x79}, /* DTMF_TONOFF */
{ 0x36, 0x11}, /* DTMF_WANONOFF */
{ 0x37, 0x00}, /* I2S_RX_SCRAMBLE_H */
{ 0x38, 0x00}, /* I2S_RX_SCRAMBLE_M */
{ 0x39, 0x00}, /* I2S_RX_SCRAMBLE_L */
{ 0x3a, 0x06}, /* APLL_CTL */
{ 0x3b, 0x00}, /* DTMF_CTL */
{ 0x3c, 0x44}, /* DTMF_PGA_CTL2 (0x3C) */
{ 0x3d, 0x69}, /* DTMF_PGA_CTL1 (0x3D) */
{ 0x3e, 0x00}, /* MISC_SET_1 */
{ 0x3f, 0x00}, /* PCMBTMUX */
/* 0x40 - 0x42 Unused */
{ 0x43, 0x00}, /* RX_PATH_SEL */
{ 0x44, 0x32}, /* VDL_APGA_CTL */
{ 0x45, 0x00}, /* VIBRA_CTL */
{ 0x46, 0x00}, /* VIBRA_SET */
{ 0x47, 0x00}, /* VIBRA_PWM_SET */
{ 0x48, 0x00}, /* ANAMIC_GAIN */
{ 0x49, 0x00}, /* MISC_SET_2 */
/* End of Audio Registers */
};
static bool twl4030_49_nop_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case 0x00:
case 0x03:
case 0x40:
case 0x41:
case 0x42:
return false;
default:
return true;
}
}
static const struct regmap_range twl4030_49_volatile_ranges[] = {
regmap_reg_range(TWL4030_BASEADD_TEST, 0xff),
};
static const struct regmap_access_table twl4030_49_volatile_table = {
.yes_ranges = twl4030_49_volatile_ranges,
.n_yes_ranges = ARRAY_SIZE(twl4030_49_volatile_ranges),
};
static const struct regmap_config twl4030_regmap_config[4] = {
{
/* Address 0x48 */
.reg_bits = 8,
.val_bits = 8,
.max_register = 0xff,
},
{
/* Address 0x49 */
.reg_bits = 8,
.val_bits = 8,
.max_register = 0xff,
.readable_reg = twl4030_49_nop_reg,
.writeable_reg = twl4030_49_nop_reg,
.volatile_table = &twl4030_49_volatile_table,
.reg_defaults = twl4030_49_defaults,
.num_reg_defaults = ARRAY_SIZE(twl4030_49_defaults),
.cache_type = REGCACHE_MAPLE,
},
{
/* Address 0x4a */
.reg_bits = 8,
.val_bits = 8,
.max_register = 0xff,
},
{
/* Address 0x4b */
.reg_bits = 8,
.val_bits = 8,
.max_register = 0xff,
},
};
static struct twl_mapping twl6030_map[] = {
/*
* NOTE: don't change this table without updating the
* <linux/mfd/twl.h> defines for TWL4030_MODULE_*
* so they continue to match the order in this table.
*/
/* Common IPs */
{ 1, TWL6030_BASEADD_USB },
{ 1, TWL6030_BASEADD_PIH },
{ 1, TWL6030_BASEADD_CHARGER },
{ 0, TWL6030_BASEADD_PM_MASTER },
{ 0, TWL6030_BASEADD_PM_SLAVE_MISC },
{ 0, TWL6030_BASEADD_RTC },
{ 1, TWL6030_BASEADD_PWM },
{ 1, TWL6030_BASEADD_LED },
{ 0, TWL6030_BASEADD_SECURED_REG },
/* TWL6030 specific IPs */
{ 0, TWL6030_BASEADD_ZERO },
{ 1, TWL6030_BASEADD_ZERO },
{ 2, TWL6030_BASEADD_ZERO },
{ 1, TWL6030_BASEADD_GPADC_CTRL },
{ 1, TWL6030_BASEADD_GASGAUGE },
/* TWL6032 specific charger registers */
{ 1, TWL6032_BASEADD_CHARGER },
};
static const struct regmap_config twl6030_regmap_config[3] = {
{
/* Address 0x48 */
.reg_bits = 8,
.val_bits = 8,
.max_register = 0xff,
},
{
/* Address 0x49 */
.reg_bits = 8,
.val_bits = 8,
.max_register = 0xff,
},
{
/* Address 0x4a */
.reg_bits = 8,
.val_bits = 8,
.max_register = 0xff,
},
};
/*----------------------------------------------------------------------*/
static inline int twl_get_num_slaves(void)
{
if (twl_class_is_4030())
return 4; /* TWL4030 class have four slave address */
else
return 3; /* TWL6030 class have three slave address */
}
static inline int twl_get_last_module(void)
{
if (twl_class_is_4030())
return TWL4030_MODULE_LAST;
else
return TWL6030_MODULE_LAST;
}
/* Exported Functions */
unsigned int twl_rev(void)
{
return twl_priv ? twl_priv->twl_id : 0;
}
EXPORT_SYMBOL(twl_rev);
/**
* twl_get_regmap - Get the regmap associated with the given module
* @mod_no: module number
*
* Returns the regmap pointer or NULL in case of failure.
*/
static struct regmap *twl_get_regmap(u8 mod_no)
{
int sid;
struct twl_client *twl;
if (unlikely(!twl_priv || !twl_priv->ready)) {
pr_err("%s: not initialized\n", DRIVER_NAME);
return NULL;
}
if (unlikely(mod_no >= twl_get_last_module())) {
pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
return NULL;
}
sid = twl_priv->twl_map[mod_no].sid;
twl = &twl_priv->twl_modules[sid];
return twl->regmap;
}
/**
* twl_i2c_write - Writes a n bit register in TWL4030/TWL5030/TWL60X0
* @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
*
* Returns 0 on success or else a negative error code.
*/
int twl_i2c_write(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
{
struct regmap *regmap = twl_get_regmap(mod_no);
int ret;
if (!regmap)
return -EPERM;
ret = regmap_bulk_write(regmap, twl_priv->twl_map[mod_no].base + reg,
value, num_bytes);
if (ret)
pr_err("%s: Write failed (mod %d, reg 0x%02x count %d)\n",
DRIVER_NAME, mod_no, reg, num_bytes);
return ret;
}
EXPORT_SYMBOL(twl_i2c_write);
/**
* twl_i2c_read - Reads a n bit register in TWL4030/TWL5030/TWL60X0
* @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 0 on success or else a negative error code.
*/
int twl_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
{
struct regmap *regmap = twl_get_regmap(mod_no);
int ret;
if (!regmap)
return -EPERM;
ret = regmap_bulk_read(regmap, twl_priv->twl_map[mod_no].base + reg,
value, num_bytes);
if (ret)
pr_err("%s: Read failed (mod %d, reg 0x%02x count %d)\n",
DRIVER_NAME, mod_no, reg, num_bytes);
return ret;
}
EXPORT_SYMBOL(twl_i2c_read);
/**
* twl_set_regcache_bypass - Configure the regcache bypass for the regmap associated
* with the module
* @mod_no: module number
* @enable: Regcache bypass state
*
* Returns 0 else failure.
*/
int twl_set_regcache_bypass(u8 mod_no, bool enable)
{
struct regmap *regmap = twl_get_regmap(mod_no);
if (!regmap)
return -EPERM;
regcache_cache_bypass(regmap, enable);
return 0;
}
EXPORT_SYMBOL(twl_set_regcache_bypass);
/*----------------------------------------------------------------------*/
/**
* twl_read_idcode_register - API to read the IDCODE register.
*
* Unlocks the IDCODE register and read the 32 bit value.
*/
static int twl_read_idcode_register(void)
{
int err;
err = twl_i2c_write_u8(TWL4030_MODULE_INTBR, TWL_EEPROM_R_UNLOCK,
REG_UNLOCK_TEST_REG);
if (err) {
pr_err("TWL4030 Unable to unlock IDCODE registers -%d\n", err);
goto fail;
}
err = twl_i2c_read(TWL4030_MODULE_INTBR, (u8 *)(&twl_priv->twl_idcode),
REG_IDCODE_7_0, 4);
if (err) {
pr_err("TWL4030: unable to read IDCODE -%d\n", err);
goto fail;
}
err = twl_i2c_write_u8(TWL4030_MODULE_INTBR, 0x0, REG_UNLOCK_TEST_REG);
if (err)
pr_err("TWL4030 Unable to relock IDCODE registers -%d\n", err);
fail:
return err;
}
/**
* twl_get_type - API to get TWL Si type.
*
* Api to get the TWL Si type from IDCODE value.
*/
int twl_get_type(void)
{
return TWL_SIL_TYPE(twl_priv->twl_idcode);
}
EXPORT_SYMBOL_GPL(twl_get_type);
/**
* twl_get_version - API to get TWL Si version.
*
* Api to get the TWL Si version from IDCODE value.
*/
int twl_get_version(void)
{
return TWL_SIL_REV(twl_priv->twl_idcode);
}
EXPORT_SYMBOL_GPL(twl_get_version);
/**
* twl_get_hfclk_rate - API to get TWL external HFCLK clock rate.
*
* Api to get the TWL HFCLK rate based on BOOT_CFG register.
*/
int twl_get_hfclk_rate(void)
{
u8 ctrl;
int rate;
twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &ctrl, R_CFG_BOOT);
switch (ctrl & 0x3) {
case HFCLK_FREQ_19p2_MHZ:
rate = 19200000;
break;
case HFCLK_FREQ_26_MHZ:
rate = 26000000;
break;
case HFCLK_FREQ_38p4_MHZ:
rate = 38400000;
break;
default:
pr_err("TWL4030: HFCLK is not configured\n");
rate = -EINVAL;
break;
}
return rate;
}
EXPORT_SYMBOL_GPL(twl_get_hfclk_rate);
/*----------------------------------------------------------------------*/
/*
* These three functions initialize the on-chip clock framework,
* letting it generate the right frequencies for USB, MADC, and
* other purposes.
*/
static inline int protect_pm_master(void)
{
int e = 0;
e = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, 0,
TWL4030_PM_MASTER_PROTECT_KEY);
return e;
}
static inline int unprotect_pm_master(void)
{
int e = 0;
e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG1,
TWL4030_PM_MASTER_PROTECT_KEY);
e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG2,
TWL4030_PM_MASTER_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;
osc = clk_get(dev, "fck");
if (IS_ERR(osc)) {
printk(KERN_WARNING "Skipping twl internal clock init and "
"using bootloader value (unknown osc rate)\n");
return;
}
rate = clk_get_rate(osc);
clk_put(osc);
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 |= twl_i2c_write_u8(TWL_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);
}
/*----------------------------------------------------------------------*/
static void twl_remove(struct i2c_client *client)
{
unsigned i, num_slaves;
if (twl_class_is_4030())
twl4030_exit_irq();
else
twl6030_exit_irq();
num_slaves = twl_get_num_slaves();
for (i = 0; i < num_slaves; i++) {
struct twl_client *twl = &twl_priv->twl_modules[i];
if (twl->client && twl->client != client)
i2c_unregister_device(twl->client);
twl->client = NULL;
}
twl_priv->ready = false;
}
static void twl6030_power_off(void)
{
int err;
u8 val;
err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &val, TWL6030_PHOENIX_DEV_ON);
if (err)
return;
val |= TWL6030_APP_DEVOFF | TWL6030_CON_DEVOFF | TWL6030_MOD_DEVOFF;
twl_i2c_write_u8(TWL_MODULE_PM_MASTER, val, TWL6030_PHOENIX_DEV_ON);
}
static struct of_dev_auxdata twl_auxdata_lookup[] = {
OF_DEV_AUXDATA("ti,twl4030-gpio", 0, "twl4030-gpio", NULL),
{ /* sentinel */ },
};
static const struct mfd_cell twl6032_cells[] = {
{ .name = "twl6032-clk" },
};
/* NOTE: This driver only handles a single twl4030/tps659x0 chip */
static int
twl_probe(struct i2c_client *client)
{
const struct i2c_device_id *id = i2c_client_get_device_id(client);
struct device_node *node = client->dev.of_node;
struct platform_device *pdev;
const struct regmap_config *twl_regmap_config;
int irq_base = 0;
int status;
unsigned i, num_slaves;
if (!node) {
dev_err(&client->dev, "no platform data\n");
return -EINVAL;
}
if (twl_priv) {
dev_dbg(&client->dev, "only one instance of %s allowed\n",
DRIVER_NAME);
return -EBUSY;
}
pdev = platform_device_alloc(DRIVER_NAME, -1);
if (!pdev) {
dev_err(&client->dev, "can't alloc pdev\n");
return -ENOMEM;
}
status = platform_device_add(pdev);
if (status) {
platform_device_put(pdev);
return status;
}
if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) == 0) {
dev_dbg(&client->dev, "can't talk I2C?\n");
status = -EIO;
goto free;
}
twl_priv = devm_kzalloc(&client->dev, sizeof(struct twl_private),
GFP_KERNEL);
if (!twl_priv) {
status = -ENOMEM;
goto free;
}
if ((id->driver_data) & TWL6030_CLASS) {
twl_priv->twl_id = TWL6030_CLASS_ID;
twl_priv->twl_map = &twl6030_map[0];
twl_regmap_config = twl6030_regmap_config;
} else {
twl_priv->twl_id = TWL4030_CLASS_ID;
twl_priv->twl_map = &twl4030_map[0];
twl_regmap_config = twl4030_regmap_config;
}
num_slaves = twl_get_num_slaves();
twl_priv->twl_modules = devm_kcalloc(&client->dev,
num_slaves,
sizeof(struct twl_client),
GFP_KERNEL);
if (!twl_priv->twl_modules) {
status = -ENOMEM;
goto free;
}
for (i = 0; i < num_slaves; i++) {
struct twl_client *twl = &twl_priv->twl_modules[i];
if (i == 0) {
twl->client = client;
} else {
twl->client = i2c_new_dummy_device(client->adapter,
client->addr + i);
if (IS_ERR(twl->client)) {
dev_err(&client->dev,
"can't attach client %d\n", i);
status = PTR_ERR(twl->client);
goto fail;
}
}
twl->regmap = devm_regmap_init_i2c(twl->client,
&twl_regmap_config[i]);
if (IS_ERR(twl->regmap)) {
status = PTR_ERR(twl->regmap);
dev_err(&client->dev,
"Failed to allocate regmap %d, err: %d\n", i,
status);
goto fail;
}
}
twl_priv->ready = true;
/* setup clock framework */
clocks_init(&client->dev);
/* read TWL IDCODE Register */
if (twl_class_is_4030()) {
status = twl_read_idcode_register();
WARN(status < 0, "Error: reading twl_idcode register value\n");
}
/* Maybe init the T2 Interrupt subsystem */
if (client->irq) {
if (twl_class_is_4030()) {
twl4030_init_chip_irq(id->name);
irq_base = twl4030_init_irq(&client->dev, client->irq);
} else {
irq_base = twl6030_init_irq(&client->dev, client->irq);
}
if (irq_base < 0) {
status = irq_base;
goto fail;
}
}
/*
* Disable TWL4030/TWL5030 I2C Pull-up on I2C1 and I2C4(SR) interface.
* Program I2C_SCL_CTRL_PU(bit 0)=0, I2C_SDA_CTRL_PU (bit 2)=0,
* SR_I2C_SCL_CTRL_PU(bit 4)=0 and SR_I2C_SDA_CTRL_PU(bit 6)=0.
*
* Also, always enable SmartReflex bit as that's needed for omaps to
* do anything over I2C4 for voltage scaling even if SmartReflex
* is disabled. Without the SmartReflex bit omap sys_clkreq idle
* signal will never trigger for retention idle.
*/
if (twl_class_is_4030()) {
u8 temp;
twl_i2c_read_u8(TWL4030_MODULE_INTBR, &temp, REG_GPPUPDCTR1);
temp &= ~(SR_I2C_SDA_CTRL_PU | SR_I2C_SCL_CTRL_PU | \
I2C_SDA_CTRL_PU | I2C_SCL_CTRL_PU);
twl_i2c_write_u8(TWL4030_MODULE_INTBR, temp, REG_GPPUPDCTR1);
twl_i2c_read_u8(TWL_MODULE_PM_RECEIVER, &temp,
TWL4030_DCDC_GLOBAL_CFG);
temp |= SMARTREFLEX_ENABLE;
twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, temp,
TWL4030_DCDC_GLOBAL_CFG);
}
if (id->driver_data == (TWL6030_CLASS | TWL6032_SUBCLASS)) {
status = devm_mfd_add_devices(&client->dev,
PLATFORM_DEVID_NONE,
twl6032_cells,
ARRAY_SIZE(twl6032_cells),
NULL, 0, NULL);
if (status < 0)
goto free;
}
if (twl_class_is_6030()) {
if (of_device_is_system_power_controller(node)) {
if (!pm_power_off)
pm_power_off = twl6030_power_off;
else
dev_warn(&client->dev, "Poweroff callback already assigned\n");
}
}
status = of_platform_populate(node, NULL, twl_auxdata_lookup,
&client->dev);
fail:
if (status < 0)
twl_remove(client);
free:
if (status < 0)
platform_device_unregister(pdev);
return status;
}
static int __maybe_unused twl_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
if (client->irq)
disable_irq(client->irq);
return 0;
}
static int __maybe_unused twl_resume(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
if (client->irq)
enable_irq(client->irq);
return 0;
}
static SIMPLE_DEV_PM_OPS(twl_dev_pm_ops, twl_suspend, twl_resume);
static const struct i2c_device_id twl_ids[] = {
{ "twl4030", TWL4030_VAUX2 }, /* "Triton 2" */
{ "twl5030", 0 }, /* T2 updated */
{ "twl5031", TWL5031 }, /* TWL5030 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 */
{ "tps65921", TPS_SUBSET }, /* fewer LDOs; no codec, no LED
and vibrator. Charger in USB module*/
{ "twl6030", TWL6030_CLASS }, /* "Phoenix power chip" */
{ "twl6032", TWL6030_CLASS | TWL6032_SUBCLASS }, /* "Phoenix lite" */
{ /* end of list */ },
};
/* One Client Driver , 4 Clients */
static struct i2c_driver twl_driver = {
.driver.name = DRIVER_NAME,
.driver.pm = &twl_dev_pm_ops,
.id_table = twl_ids,
.probe = twl_probe,
.remove = twl_remove,
};
builtin_i2c_driver(twl_driver);
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