diff options
Diffstat (limited to 'drivers/extcon/extcon-rt8973a.c')
| -rw-r--r-- | drivers/extcon/extcon-rt8973a.c | 738 |
1 files changed, 738 insertions, 0 deletions
diff --git a/drivers/extcon/extcon-rt8973a.c b/drivers/extcon/extcon-rt8973a.c new file mode 100644 index 000000000..9ccd5af89 --- /dev/null +++ b/drivers/extcon/extcon-rt8973a.c @@ -0,0 +1,738 @@ +/* + * extcon-rt8973a.c - Richtek RT8973A extcon driver to support USB switches + * + * Copyright (c) 2014 Samsung Electronics Co., Ltd + * Author: Chanwoo Choi <cw00.choi@samsung.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. + */ + +#include <linux/err.h> +#include <linux/i2c.h> +#include <linux/input.h> +#include <linux/interrupt.h> +#include <linux/irqdomain.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> +#include <linux/slab.h> +#include <linux/extcon.h> + +#include "extcon-rt8973a.h" + +#define DELAY_MS_DEFAULT 20000 /* unit: millisecond */ + +struct muic_irq { + unsigned int irq; + const char *name; + unsigned int virq; +}; + +struct reg_data { + u8 reg; + u8 mask; + u8 val; + bool invert; +}; + +struct rt8973a_muic_info { + struct device *dev; + struct extcon_dev *edev; + + struct i2c_client *i2c; + struct regmap *regmap; + + struct regmap_irq_chip_data *irq_data; + struct muic_irq *muic_irqs; + unsigned int num_muic_irqs; + int irq; + bool irq_attach; + bool irq_detach; + bool irq_ovp; + bool irq_otp; + struct work_struct irq_work; + + struct reg_data *reg_data; + unsigned int num_reg_data; + bool auto_config; + + struct mutex mutex; + + /* + * Use delayed workqueue to detect cable state and then + * notify cable state to notifiee/platform through uevent. + * After completing the booting of platform, the extcon provider + * driver should notify cable state to upper layer. + */ + struct delayed_work wq_detcable; +}; + +/* Default value of RT8973A register to bring up MUIC device. */ +static struct reg_data rt8973a_reg_data[] = { + { + .reg = RT8973A_REG_CONTROL1, + .mask = RT8973A_REG_CONTROL1_ADC_EN_MASK + | RT8973A_REG_CONTROL1_USB_CHD_EN_MASK + | RT8973A_REG_CONTROL1_CHGTYP_MASK + | RT8973A_REG_CONTROL1_SWITCH_OPEN_MASK + | RT8973A_REG_CONTROL1_AUTO_CONFIG_MASK + | RT8973A_REG_CONTROL1_INTM_MASK, + .val = RT8973A_REG_CONTROL1_ADC_EN_MASK + | RT8973A_REG_CONTROL1_USB_CHD_EN_MASK + | RT8973A_REG_CONTROL1_CHGTYP_MASK, + .invert = false, + }, + { /* sentinel */ } +}; + +/* List of detectable cables */ +enum { + EXTCON_CABLE_USB = 0, + EXTCON_CABLE_USB_HOST, + EXTCON_CABLE_TA, + EXTCON_CABLE_JIG_OFF_USB, + EXTCON_CABLE_JIG_ON_USB, + EXTCON_CABLE_JIG_OFF_UART, + EXTCON_CABLE_JIG_ON_UART, + + EXTCON_CABLE_END, +}; + +static const char *rt8973a_extcon_cable[] = { + [EXTCON_CABLE_USB] = "USB", + [EXTCON_CABLE_USB_HOST] = "USB-Host", + [EXTCON_CABLE_TA] = "TA", + [EXTCON_CABLE_JIG_OFF_USB] = "JIG-USB-OFF", + [EXTCON_CABLE_JIG_ON_USB] = "JIG-USB-ON", + [EXTCON_CABLE_JIG_OFF_UART] = "JIG-UART-OFF", + [EXTCON_CABLE_JIG_ON_UART] = "JIG-UART-ON", + NULL, +}; + +/* Define OVP (Over Voltage Protection), OTP (Over Temperature Protection) */ +enum rt8973a_event_type { + RT8973A_EVENT_ATTACH = 1, + RT8973A_EVENT_DETACH, + RT8973A_EVENT_OVP, + RT8973A_EVENT_OTP, +}; + +/* Define supported accessory type */ +enum rt8973a_muic_acc_type { + RT8973A_MUIC_ADC_OTG = 0x0, + RT8973A_MUIC_ADC_AUDIO_SEND_END_BUTTON, + RT8973A_MUIC_ADC_AUDIO_REMOTE_S1_BUTTON, + RT8973A_MUIC_ADC_AUDIO_REMOTE_S2_BUTTON, + RT8973A_MUIC_ADC_AUDIO_REMOTE_S3_BUTTON, + RT8973A_MUIC_ADC_AUDIO_REMOTE_S4_BUTTON, + RT8973A_MUIC_ADC_AUDIO_REMOTE_S5_BUTTON, + RT8973A_MUIC_ADC_AUDIO_REMOTE_S6_BUTTON, + RT8973A_MUIC_ADC_AUDIO_REMOTE_S7_BUTTON, + RT8973A_MUIC_ADC_AUDIO_REMOTE_S8_BUTTON, + RT8973A_MUIC_ADC_AUDIO_REMOTE_S9_BUTTON, + RT8973A_MUIC_ADC_AUDIO_REMOTE_S10_BUTTON, + RT8973A_MUIC_ADC_AUDIO_REMOTE_S11_BUTTON, + RT8973A_MUIC_ADC_AUDIO_REMOTE_S12_BUTTON, + RT8973A_MUIC_ADC_RESERVED_ACC_1, + RT8973A_MUIC_ADC_RESERVED_ACC_2, + RT8973A_MUIC_ADC_RESERVED_ACC_3, + RT8973A_MUIC_ADC_RESERVED_ACC_4, + RT8973A_MUIC_ADC_RESERVED_ACC_5, + RT8973A_MUIC_ADC_AUDIO_TYPE2, + RT8973A_MUIC_ADC_PHONE_POWERED_DEV, + RT8973A_MUIC_ADC_UNKNOWN_ACC_1, + RT8973A_MUIC_ADC_UNKNOWN_ACC_2, + RT8973A_MUIC_ADC_TA, + RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB, + RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB, + RT8973A_MUIC_ADC_UNKNOWN_ACC_3, + RT8973A_MUIC_ADC_UNKNOWN_ACC_4, + RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART, + RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART, + RT8973A_MUIC_ADC_UNKNOWN_ACC_5, + RT8973A_MUIC_ADC_OPEN = 0x1f, + + /* The below accessories has same ADC value (0x1f). + So, Device type1 is used to separate specific accessory. */ + /* |---------|--ADC| */ + /* | [7:5]|[4:0]| */ + RT8973A_MUIC_ADC_USB = 0x3f, /* | 001|11111| */ +}; + +/* List of supported interrupt for RT8973A */ +static struct muic_irq rt8973a_muic_irqs[] = { + { RT8973A_INT1_ATTACH, "muic-attach" }, + { RT8973A_INT1_DETACH, "muic-detach" }, + { RT8973A_INT1_CHGDET, "muic-chgdet" }, + { RT8973A_INT1_DCD_T, "muic-dcd-t" }, + { RT8973A_INT1_OVP, "muic-ovp" }, + { RT8973A_INT1_CONNECT, "muic-connect" }, + { RT8973A_INT1_ADC_CHG, "muic-adc-chg" }, + { RT8973A_INT1_OTP, "muic-otp" }, + { RT8973A_INT2_UVLO, "muic-uvlo" }, + { RT8973A_INT2_POR, "muic-por" }, + { RT8973A_INT2_OTP_FET, "muic-otp-fet" }, + { RT8973A_INT2_OVP_FET, "muic-ovp-fet" }, + { RT8973A_INT2_OCP_LATCH, "muic-ocp-latch" }, + { RT8973A_INT2_OCP, "muic-ocp" }, + { RT8973A_INT2_OVP_OCP, "muic-ovp-ocp" }, +}; + +/* Define interrupt list of RT8973A to register regmap_irq */ +static const struct regmap_irq rt8973a_irqs[] = { + /* INT1 interrupts */ + { .reg_offset = 0, .mask = RT8973A_INT1_ATTACH_MASK, }, + { .reg_offset = 0, .mask = RT8973A_INT1_DETACH_MASK, }, + { .reg_offset = 0, .mask = RT8973A_INT1_CHGDET_MASK, }, + { .reg_offset = 0, .mask = RT8973A_INT1_DCD_T_MASK, }, + { .reg_offset = 0, .mask = RT8973A_INT1_OVP_MASK, }, + { .reg_offset = 0, .mask = RT8973A_INT1_CONNECT_MASK, }, + { .reg_offset = 0, .mask = RT8973A_INT1_ADC_CHG_MASK, }, + { .reg_offset = 0, .mask = RT8973A_INT1_OTP_MASK, }, + + /* INT2 interrupts */ + { .reg_offset = 1, .mask = RT8973A_INT2_UVLOT_MASK,}, + { .reg_offset = 1, .mask = RT8973A_INT2_POR_MASK, }, + { .reg_offset = 1, .mask = RT8973A_INT2_OTP_FET_MASK, }, + { .reg_offset = 1, .mask = RT8973A_INT2_OVP_FET_MASK, }, + { .reg_offset = 1, .mask = RT8973A_INT2_OCP_LATCH_MASK, }, + { .reg_offset = 1, .mask = RT8973A_INT2_OCP_MASK, }, + { .reg_offset = 1, .mask = RT8973A_INT2_OVP_OCP_MASK, }, +}; + +static const struct regmap_irq_chip rt8973a_muic_irq_chip = { + .name = "rt8973a", + .status_base = RT8973A_REG_INT1, + .mask_base = RT8973A_REG_INTM1, + .mask_invert = false, + .num_regs = 2, + .irqs = rt8973a_irqs, + .num_irqs = ARRAY_SIZE(rt8973a_irqs), +}; + +/* Define regmap configuration of RT8973A for I2C communication */ +static bool rt8973a_muic_volatile_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case RT8973A_REG_INTM1: + case RT8973A_REG_INTM2: + return true; + default: + break; + } + return false; +} + +static const struct regmap_config rt8973a_muic_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .volatile_reg = rt8973a_muic_volatile_reg, + .max_register = RT8973A_REG_END, +}; + +/* Change DM_CON/DP_CON/VBUSIN switch according to cable type */ +static int rt8973a_muic_set_path(struct rt8973a_muic_info *info, + unsigned int con_sw, bool attached) +{ + int ret; + + /* + * Don't need to set h/w path according to cable type + * if Auto-configuration mode of CONTROL1 register is true. + */ + if (info->auto_config) + return 0; + + if (!attached) + con_sw = DM_DP_SWITCH_UART; + + switch (con_sw) { + case DM_DP_SWITCH_OPEN: + case DM_DP_SWITCH_USB: + case DM_DP_SWITCH_UART: + ret = regmap_update_bits(info->regmap, RT8973A_REG_MANUAL_SW1, + RT8973A_REG_MANUAL_SW1_DP_MASK | + RT8973A_REG_MANUAL_SW1_DM_MASK, + con_sw); + if (ret < 0) { + dev_err(info->dev, + "cannot update DM_CON/DP_CON switch\n"); + return ret; + } + break; + default: + dev_err(info->dev, "Unknown DM_CON/DP_CON switch type (%d)\n", + con_sw); + return -EINVAL; + } + + return 0; +} + +static int rt8973a_muic_get_cable_type(struct rt8973a_muic_info *info) +{ + unsigned int adc, dev1; + int ret, cable_type; + + /* Read ADC value according to external cable or button */ + ret = regmap_read(info->regmap, RT8973A_REG_ADC, &adc); + if (ret) { + dev_err(info->dev, "failed to read ADC register\n"); + return ret; + } + cable_type = adc & RT8973A_REG_ADC_MASK; + + /* Read Device 1 reigster to identify correct cable type */ + ret = regmap_read(info->regmap, RT8973A_REG_DEV1, &dev1); + if (ret) { + dev_err(info->dev, "failed to read DEV1 register\n"); + return ret; + } + + switch (adc) { + case RT8973A_MUIC_ADC_OPEN: + if (dev1 & RT8973A_REG_DEV1_USB_MASK) + cable_type = RT8973A_MUIC_ADC_USB; + else if (dev1 & RT8973A_REG_DEV1_DCPORT_MASK) + cable_type = RT8973A_MUIC_ADC_TA; + else + cable_type = RT8973A_MUIC_ADC_OPEN; + break; + default: + break; + } + + return cable_type; +} + +static int rt8973a_muic_cable_handler(struct rt8973a_muic_info *info, + enum rt8973a_event_type event) +{ + static unsigned int prev_cable_type; + const char **cable_names = info->edev->supported_cable; + unsigned int con_sw = DM_DP_SWITCH_UART; + int ret, idx = 0, cable_type; + bool attached = false; + + if (!cable_names) + return 0; + + switch (event) { + case RT8973A_EVENT_ATTACH: + cable_type = rt8973a_muic_get_cable_type(info); + attached = true; + break; + case RT8973A_EVENT_DETACH: + cable_type = prev_cable_type; + attached = false; + break; + case RT8973A_EVENT_OVP: + case RT8973A_EVENT_OTP: + dev_warn(info->dev, + "happen Over %s issue. Need to disconnect all cables\n", + event == RT8973A_EVENT_OVP ? "Voltage" : "Temperature"); + cable_type = prev_cable_type; + attached = false; + break; + default: + dev_err(info->dev, + "Cannot handle this event (event:%d)\n", event); + return -EINVAL; + } + prev_cable_type = cable_type; + + switch (cable_type) { + case RT8973A_MUIC_ADC_OTG: + idx = EXTCON_CABLE_USB_HOST; + con_sw = DM_DP_SWITCH_USB; + break; + case RT8973A_MUIC_ADC_TA: + idx = EXTCON_CABLE_TA; + con_sw = DM_DP_SWITCH_OPEN; + break; + case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB: + idx = EXTCON_CABLE_JIG_OFF_USB; + con_sw = DM_DP_SWITCH_UART; + break; + case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB: + idx = EXTCON_CABLE_JIG_ON_USB; + con_sw = DM_DP_SWITCH_UART; + break; + case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART: + idx = EXTCON_CABLE_JIG_OFF_UART; + con_sw = DM_DP_SWITCH_UART; + break; + case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART: + idx = EXTCON_CABLE_JIG_ON_UART; + con_sw = DM_DP_SWITCH_UART; + break; + case RT8973A_MUIC_ADC_USB: + idx = EXTCON_CABLE_USB; + con_sw = DM_DP_SWITCH_USB; + break; + case RT8973A_MUIC_ADC_OPEN: + return 0; + case RT8973A_MUIC_ADC_UNKNOWN_ACC_1: + case RT8973A_MUIC_ADC_UNKNOWN_ACC_2: + case RT8973A_MUIC_ADC_UNKNOWN_ACC_3: + case RT8973A_MUIC_ADC_UNKNOWN_ACC_4: + case RT8973A_MUIC_ADC_UNKNOWN_ACC_5: + dev_warn(info->dev, + "Unknown accessory type (adc:0x%x)\n", cable_type); + return 0; + case RT8973A_MUIC_ADC_AUDIO_SEND_END_BUTTON: + case RT8973A_MUIC_ADC_AUDIO_REMOTE_S1_BUTTON: + case RT8973A_MUIC_ADC_AUDIO_REMOTE_S2_BUTTON: + case RT8973A_MUIC_ADC_AUDIO_REMOTE_S3_BUTTON: + case RT8973A_MUIC_ADC_AUDIO_REMOTE_S4_BUTTON: + case RT8973A_MUIC_ADC_AUDIO_REMOTE_S5_BUTTON: + case RT8973A_MUIC_ADC_AUDIO_REMOTE_S6_BUTTON: + case RT8973A_MUIC_ADC_AUDIO_REMOTE_S7_BUTTON: + case RT8973A_MUIC_ADC_AUDIO_REMOTE_S8_BUTTON: + case RT8973A_MUIC_ADC_AUDIO_REMOTE_S9_BUTTON: + case RT8973A_MUIC_ADC_AUDIO_REMOTE_S10_BUTTON: + case RT8973A_MUIC_ADC_AUDIO_REMOTE_S11_BUTTON: + case RT8973A_MUIC_ADC_AUDIO_REMOTE_S12_BUTTON: + case RT8973A_MUIC_ADC_AUDIO_TYPE2: + dev_warn(info->dev, + "Audio device/button type (adc:0x%x)\n", cable_type); + return 0; + case RT8973A_MUIC_ADC_RESERVED_ACC_1: + case RT8973A_MUIC_ADC_RESERVED_ACC_2: + case RT8973A_MUIC_ADC_RESERVED_ACC_3: + case RT8973A_MUIC_ADC_RESERVED_ACC_4: + case RT8973A_MUIC_ADC_RESERVED_ACC_5: + case RT8973A_MUIC_ADC_PHONE_POWERED_DEV: + return 0; + default: + dev_err(info->dev, + "Cannot handle this cable_type (adc:0x%x)\n", + cable_type); + return -EINVAL; + } + + /* Change internal hardware path(DM_CON/DP_CON) */ + ret = rt8973a_muic_set_path(info, con_sw, attached); + if (ret < 0) + return ret; + + /* Change the state of external accessory */ + extcon_set_cable_state(info->edev, cable_names[idx], attached); + + return 0; +} + +static void rt8973a_muic_irq_work(struct work_struct *work) +{ + struct rt8973a_muic_info *info = container_of(work, + struct rt8973a_muic_info, irq_work); + int ret = 0; + + if (!info->edev) + return; + + mutex_lock(&info->mutex); + + /* Detect attached or detached cables */ + if (info->irq_attach) { + ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_ATTACH); + info->irq_attach = false; + } + + if (info->irq_detach) { + ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_DETACH); + info->irq_detach = false; + } + + if (info->irq_ovp) { + ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_OVP); + info->irq_ovp = false; + } + + if (info->irq_otp) { + ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_OTP); + info->irq_otp = false; + } + + if (ret < 0) + dev_err(info->dev, "failed to handle MUIC interrupt\n"); + + mutex_unlock(&info->mutex); +} + +static irqreturn_t rt8973a_muic_irq_handler(int irq, void *data) +{ + struct rt8973a_muic_info *info = data; + int i, irq_type = -1; + + for (i = 0; i < info->num_muic_irqs; i++) + if (irq == info->muic_irqs[i].virq) + irq_type = info->muic_irqs[i].irq; + + switch (irq_type) { + case RT8973A_INT1_ATTACH: + info->irq_attach = true; + break; + case RT8973A_INT1_DETACH: + info->irq_detach = true; + break; + case RT8973A_INT1_OVP: + info->irq_ovp = true; + break; + case RT8973A_INT1_OTP: + info->irq_otp = true; + break; + case RT8973A_INT1_CHGDET: + case RT8973A_INT1_DCD_T: + case RT8973A_INT1_CONNECT: + case RT8973A_INT1_ADC_CHG: + case RT8973A_INT2_UVLO: + case RT8973A_INT2_POR: + case RT8973A_INT2_OTP_FET: + case RT8973A_INT2_OVP_FET: + case RT8973A_INT2_OCP_LATCH: + case RT8973A_INT2_OCP: + case RT8973A_INT2_OVP_OCP: + default: + dev_dbg(info->dev, + "Cannot handle this interrupt (%d)\n", irq_type); + break; + } + + schedule_work(&info->irq_work); + + return IRQ_HANDLED; +} + +static void rt8973a_muic_detect_cable_wq(struct work_struct *work) +{ + struct rt8973a_muic_info *info = container_of(to_delayed_work(work), + struct rt8973a_muic_info, wq_detcable); + int ret; + + /* Notify the state of connector cable or not */ + ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_ATTACH); + if (ret < 0) + dev_warn(info->dev, "failed to detect cable state\n"); +} + +static void rt8973a_init_dev_type(struct rt8973a_muic_info *info) +{ + unsigned int data, vendor_id, version_id; + int i, ret; + + /* To test I2C, Print version_id and vendor_id of RT8973A */ + ret = regmap_read(info->regmap, RT8973A_REG_DEVICE_ID, &data); + if (ret) { + dev_err(info->dev, + "failed to read DEVICE_ID register: %d\n", ret); + return; + } + + vendor_id = ((data & RT8973A_REG_DEVICE_ID_VENDOR_MASK) >> + RT8973A_REG_DEVICE_ID_VENDOR_SHIFT); + version_id = ((data & RT8973A_REG_DEVICE_ID_VERSION_MASK) >> + RT8973A_REG_DEVICE_ID_VERSION_SHIFT); + + dev_info(info->dev, "Device type: version: 0x%x, vendor: 0x%x\n", + version_id, vendor_id); + + /* Initiazle the register of RT8973A device to bring-up */ + for (i = 0; i < info->num_reg_data; i++) { + u8 reg = info->reg_data[i].reg; + u8 mask = info->reg_data[i].mask; + u8 val = 0; + + if (info->reg_data[i].invert) + val = ~info->reg_data[i].val; + else + val = info->reg_data[i].val; + + regmap_update_bits(info->regmap, reg, mask, val); + } + + /* Check whether RT8973A is auto swithcing mode or not */ + ret = regmap_read(info->regmap, RT8973A_REG_CONTROL1, &data); + if (ret) { + dev_err(info->dev, + "failed to read CONTROL1 register: %d\n", ret); + return; + } + + data &= RT8973A_REG_CONTROL1_AUTO_CONFIG_MASK; + if (data) { + info->auto_config = true; + dev_info(info->dev, + "Enable Auto-configuration for internal path\n"); + } +} + +static int rt8973a_muic_i2c_probe(struct i2c_client *i2c, + const struct i2c_device_id *id) +{ + struct device_node *np = i2c->dev.of_node; + struct rt8973a_muic_info *info; + int i, ret, irq_flags; + + if (!np) + return -EINVAL; + + info = devm_kzalloc(&i2c->dev, sizeof(*info), GFP_KERNEL); + if (!info) + return -ENOMEM; + i2c_set_clientdata(i2c, info); + + info->dev = &i2c->dev; + info->i2c = i2c; + info->irq = i2c->irq; + info->muic_irqs = rt8973a_muic_irqs; + info->num_muic_irqs = ARRAY_SIZE(rt8973a_muic_irqs); + info->reg_data = rt8973a_reg_data; + info->num_reg_data = ARRAY_SIZE(rt8973a_reg_data); + + mutex_init(&info->mutex); + + INIT_WORK(&info->irq_work, rt8973a_muic_irq_work); + + info->regmap = devm_regmap_init_i2c(i2c, &rt8973a_muic_regmap_config); + if (IS_ERR(info->regmap)) { + ret = PTR_ERR(info->regmap); + dev_err(info->dev, "failed to allocate register map: %d\n", + ret); + return ret; + } + + /* Support irq domain for RT8973A MUIC device */ + irq_flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED; + ret = regmap_add_irq_chip(info->regmap, info->irq, irq_flags, 0, + &rt8973a_muic_irq_chip, &info->irq_data); + if (ret != 0) { + dev_err(info->dev, "failed to add irq_chip (irq:%d, err:%d)\n", + info->irq, ret); + return ret; + } + + for (i = 0; i < info->num_muic_irqs; i++) { + struct muic_irq *muic_irq = &info->muic_irqs[i]; + unsigned int virq = 0; + + virq = regmap_irq_get_virq(info->irq_data, muic_irq->irq); + if (virq <= 0) + return -EINVAL; + muic_irq->virq = virq; + + ret = devm_request_threaded_irq(info->dev, virq, NULL, + rt8973a_muic_irq_handler, + IRQF_NO_SUSPEND, + muic_irq->name, info); + if (ret) { + dev_err(info->dev, + "failed: irq request (IRQ: %d, error :%d)\n", + muic_irq->irq, ret); + return ret; + } + } + + /* Allocate extcon device */ + info->edev = devm_extcon_dev_allocate(info->dev, rt8973a_extcon_cable); + if (IS_ERR(info->edev)) { + dev_err(info->dev, "failed to allocate memory for extcon\n"); + return -ENOMEM; + } + info->edev->name = np->name; + + /* Register extcon device */ + ret = devm_extcon_dev_register(info->dev, info->edev); + if (ret) { + dev_err(info->dev, "failed to register extcon device\n"); + return ret; + } + + /* + * Detect accessory after completing the initialization of platform + * + * - Use delayed workqueue to detect cable state and then + * notify cable state to notifiee/platform through uevent. + * After completing the booting of platform, the extcon provider + * driver should notify cable state to upper layer. + */ + INIT_DELAYED_WORK(&info->wq_detcable, rt8973a_muic_detect_cable_wq); + queue_delayed_work(system_power_efficient_wq, &info->wq_detcable, + msecs_to_jiffies(DELAY_MS_DEFAULT)); + + /* Initialize RT8973A device and print vendor id and version id */ + rt8973a_init_dev_type(info); + + return 0; +} + +static int rt8973a_muic_i2c_remove(struct i2c_client *i2c) +{ + struct rt8973a_muic_info *info = i2c_get_clientdata(i2c); + + regmap_del_irq_chip(info->irq, info->irq_data); + + return 0; +} + +static const struct of_device_id rt8973a_dt_match[] = { + { .compatible = "richtek,rt8973a-muic" }, + { }, +}; + +#ifdef CONFIG_PM_SLEEP +static int rt8973a_muic_suspend(struct device *dev) +{ + struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); + struct rt8973a_muic_info *info = i2c_get_clientdata(i2c); + + enable_irq_wake(info->irq); + + return 0; +} + +static int rt8973a_muic_resume(struct device *dev) +{ + struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); + struct rt8973a_muic_info *info = i2c_get_clientdata(i2c); + + disable_irq_wake(info->irq); + + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(rt8973a_muic_pm_ops, + rt8973a_muic_suspend, rt8973a_muic_resume); + +static const struct i2c_device_id rt8973a_i2c_id[] = { + { "rt8973a", TYPE_RT8973A }, + { } +}; +MODULE_DEVICE_TABLE(i2c, rt8973a_i2c_id); + +static struct i2c_driver rt8973a_muic_i2c_driver = { + .driver = { + .name = "rt8973a", + .owner = THIS_MODULE, + .pm = &rt8973a_muic_pm_ops, + .of_match_table = rt8973a_dt_match, + }, + .probe = rt8973a_muic_i2c_probe, + .remove = rt8973a_muic_i2c_remove, + .id_table = rt8973a_i2c_id, +}; + +static int __init rt8973a_muic_i2c_init(void) +{ + return i2c_add_driver(&rt8973a_muic_i2c_driver); +} +subsys_initcall(rt8973a_muic_i2c_init); + +MODULE_DESCRIPTION("Richtek RT8973A Extcon driver"); +MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>"); +MODULE_LICENSE("GPL"); |