diff options
Diffstat (limited to 'drivers/mfd/twl-core.c')
-rw-r--r-- | drivers/mfd/twl-core.c | 896 |
1 files changed, 896 insertions, 0 deletions
diff --git a/drivers/mfd/twl-core.c b/drivers/mfd/twl-core.c new file mode 100644 index 0000000000..ce01a87f8d --- /dev/null +++ b/drivers/mfd/twl-core.c @@ -0,0 +1,896 @@ +// 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/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 + +/* 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_RBTREE, + }, + { + /* 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 struct of_dev_auxdata twl_auxdata_lookup[] = { + OF_DEV_AUXDATA("ti,twl4030-gpio", 0, "twl4030-gpio", NULL), + { /* sentinel */ }, +}; + +/* 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); + } + + 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); |