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![Chanwoo Choi](/assets/img/avatar_default.png)
The extcon has two type of extcon devices as following. - 'extcon provider deivce' adds new extcon device and detect the state/properties of external connector. Also, it notifies the state/properties to the extcon consumer device. - 'extcon consumer device' gets the change state/properties from extcon provider device. Prior to that, include/linux/extcon.h contains all exported API for both provider and consumer device driver. To clarify the meaning of header file and to remove the wrong use-case on consumer device, this patch separates into extcon.h and extcon-provider.h. [Description for include/linux/{extcon.h|extcon-provider.h}] - extcon.h includes the extcon API and data structure for extcon consumer device driver. This header file contains the following APIs: : Register/unregister the notifier to catch the change of extcon device : Get the extcon device instance : Get the extcon device name : Get the state of each external connector : Get the property value of each external connector : Get the property capability of each external connector - extcon-provider.h includes the extcon API and data structure for extcon provider device driver. This header file contains the following APIs: : Include 'include/linux/extcon.h' : Allocate the memory for extcon device instance : Register/unregister extcon device : Set the state of each external connector : Set the property value of each external connector : Set the property capability of each external connector Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com> Acked-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk> Acked-by: Chen-Yu Tsai <wens@csie.org> Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com> Acked-by: Lee Jones <lee.jones@linaro.org> Acked-by: Felipe Balbi <felipe.balbi@linux.intel.com> Acked-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Acked-by: Kishon Vijay Abraham I <kishon@ti.com>
719 lines
19 KiB
C
719 lines
19 KiB
C
/*
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* extcon-rt8973a.c - Richtek RT8973A extcon driver to support USB switches
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*
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* Copyright (c) 2014 Samsung Electronics Co., Ltd
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* Author: Chanwoo Choi <cw00.choi@samsung.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <linux/err.h>
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#include <linux/i2c.h>
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#include <linux/input.h>
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#include <linux/interrupt.h>
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#include <linux/irqdomain.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/regmap.h>
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#include <linux/slab.h>
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#include <linux/extcon-provider.h>
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#include "extcon-rt8973a.h"
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#define DELAY_MS_DEFAULT 20000 /* unit: millisecond */
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struct muic_irq {
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unsigned int irq;
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const char *name;
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unsigned int virq;
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};
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struct reg_data {
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u8 reg;
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u8 mask;
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u8 val;
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bool invert;
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};
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struct rt8973a_muic_info {
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struct device *dev;
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struct extcon_dev *edev;
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struct i2c_client *i2c;
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struct regmap *regmap;
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struct regmap_irq_chip_data *irq_data;
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struct muic_irq *muic_irqs;
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unsigned int num_muic_irqs;
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int irq;
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bool irq_attach;
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bool irq_detach;
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bool irq_ovp;
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bool irq_otp;
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struct work_struct irq_work;
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struct reg_data *reg_data;
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unsigned int num_reg_data;
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bool auto_config;
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struct mutex mutex;
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/*
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* Use delayed workqueue to detect cable state and then
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* notify cable state to notifiee/platform through uevent.
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* After completing the booting of platform, the extcon provider
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* driver should notify cable state to upper layer.
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*/
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struct delayed_work wq_detcable;
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};
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/* Default value of RT8973A register to bring up MUIC device. */
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static struct reg_data rt8973a_reg_data[] = {
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{
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.reg = RT8973A_REG_CONTROL1,
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.mask = RT8973A_REG_CONTROL1_ADC_EN_MASK
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| RT8973A_REG_CONTROL1_USB_CHD_EN_MASK
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| RT8973A_REG_CONTROL1_CHGTYP_MASK
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| RT8973A_REG_CONTROL1_SWITCH_OPEN_MASK
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| RT8973A_REG_CONTROL1_AUTO_CONFIG_MASK
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| RT8973A_REG_CONTROL1_INTM_MASK,
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.val = RT8973A_REG_CONTROL1_ADC_EN_MASK
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| RT8973A_REG_CONTROL1_USB_CHD_EN_MASK
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| RT8973A_REG_CONTROL1_CHGTYP_MASK,
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.invert = false,
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},
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{ /* sentinel */ }
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};
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/* List of detectable cables */
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static const unsigned int rt8973a_extcon_cable[] = {
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EXTCON_USB,
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EXTCON_USB_HOST,
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EXTCON_CHG_USB_SDP,
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EXTCON_CHG_USB_DCP,
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EXTCON_JIG,
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EXTCON_NONE,
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};
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/* Define OVP (Over Voltage Protection), OTP (Over Temperature Protection) */
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enum rt8973a_event_type {
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RT8973A_EVENT_ATTACH = 1,
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RT8973A_EVENT_DETACH,
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RT8973A_EVENT_OVP,
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RT8973A_EVENT_OTP,
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};
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/* Define supported accessory type */
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enum rt8973a_muic_acc_type {
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RT8973A_MUIC_ADC_OTG = 0x0,
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RT8973A_MUIC_ADC_AUDIO_SEND_END_BUTTON,
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RT8973A_MUIC_ADC_AUDIO_REMOTE_S1_BUTTON,
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RT8973A_MUIC_ADC_AUDIO_REMOTE_S2_BUTTON,
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RT8973A_MUIC_ADC_AUDIO_REMOTE_S3_BUTTON,
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RT8973A_MUIC_ADC_AUDIO_REMOTE_S4_BUTTON,
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RT8973A_MUIC_ADC_AUDIO_REMOTE_S5_BUTTON,
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RT8973A_MUIC_ADC_AUDIO_REMOTE_S6_BUTTON,
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RT8973A_MUIC_ADC_AUDIO_REMOTE_S7_BUTTON,
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RT8973A_MUIC_ADC_AUDIO_REMOTE_S8_BUTTON,
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RT8973A_MUIC_ADC_AUDIO_REMOTE_S9_BUTTON,
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RT8973A_MUIC_ADC_AUDIO_REMOTE_S10_BUTTON,
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RT8973A_MUIC_ADC_AUDIO_REMOTE_S11_BUTTON,
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RT8973A_MUIC_ADC_AUDIO_REMOTE_S12_BUTTON,
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RT8973A_MUIC_ADC_RESERVED_ACC_1,
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RT8973A_MUIC_ADC_RESERVED_ACC_2,
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RT8973A_MUIC_ADC_RESERVED_ACC_3,
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RT8973A_MUIC_ADC_RESERVED_ACC_4,
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RT8973A_MUIC_ADC_RESERVED_ACC_5,
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RT8973A_MUIC_ADC_AUDIO_TYPE2,
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RT8973A_MUIC_ADC_PHONE_POWERED_DEV,
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RT8973A_MUIC_ADC_UNKNOWN_ACC_1,
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RT8973A_MUIC_ADC_UNKNOWN_ACC_2,
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RT8973A_MUIC_ADC_TA,
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RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB,
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RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB,
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RT8973A_MUIC_ADC_UNKNOWN_ACC_3,
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RT8973A_MUIC_ADC_UNKNOWN_ACC_4,
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RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART,
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RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART,
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RT8973A_MUIC_ADC_UNKNOWN_ACC_5,
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RT8973A_MUIC_ADC_OPEN = 0x1f,
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/*
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* The below accessories has same ADC value (0x1f).
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* So, Device type1 is used to separate specific accessory.
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*/
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/* |---------|--ADC| */
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/* | [7:5]|[4:0]| */
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RT8973A_MUIC_ADC_USB = 0x3f, /* | 001|11111| */
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};
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/* List of supported interrupt for RT8973A */
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static struct muic_irq rt8973a_muic_irqs[] = {
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{ RT8973A_INT1_ATTACH, "muic-attach" },
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{ RT8973A_INT1_DETACH, "muic-detach" },
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{ RT8973A_INT1_CHGDET, "muic-chgdet" },
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{ RT8973A_INT1_DCD_T, "muic-dcd-t" },
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{ RT8973A_INT1_OVP, "muic-ovp" },
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{ RT8973A_INT1_CONNECT, "muic-connect" },
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{ RT8973A_INT1_ADC_CHG, "muic-adc-chg" },
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{ RT8973A_INT1_OTP, "muic-otp" },
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{ RT8973A_INT2_UVLO, "muic-uvlo" },
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{ RT8973A_INT2_POR, "muic-por" },
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{ RT8973A_INT2_OTP_FET, "muic-otp-fet" },
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{ RT8973A_INT2_OVP_FET, "muic-ovp-fet" },
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{ RT8973A_INT2_OCP_LATCH, "muic-ocp-latch" },
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{ RT8973A_INT2_OCP, "muic-ocp" },
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{ RT8973A_INT2_OVP_OCP, "muic-ovp-ocp" },
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};
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/* Define interrupt list of RT8973A to register regmap_irq */
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static const struct regmap_irq rt8973a_irqs[] = {
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/* INT1 interrupts */
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{ .reg_offset = 0, .mask = RT8973A_INT1_ATTACH_MASK, },
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{ .reg_offset = 0, .mask = RT8973A_INT1_DETACH_MASK, },
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{ .reg_offset = 0, .mask = RT8973A_INT1_CHGDET_MASK, },
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{ .reg_offset = 0, .mask = RT8973A_INT1_DCD_T_MASK, },
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{ .reg_offset = 0, .mask = RT8973A_INT1_OVP_MASK, },
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{ .reg_offset = 0, .mask = RT8973A_INT1_CONNECT_MASK, },
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{ .reg_offset = 0, .mask = RT8973A_INT1_ADC_CHG_MASK, },
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{ .reg_offset = 0, .mask = RT8973A_INT1_OTP_MASK, },
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/* INT2 interrupts */
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{ .reg_offset = 1, .mask = RT8973A_INT2_UVLOT_MASK,},
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{ .reg_offset = 1, .mask = RT8973A_INT2_POR_MASK, },
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{ .reg_offset = 1, .mask = RT8973A_INT2_OTP_FET_MASK, },
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{ .reg_offset = 1, .mask = RT8973A_INT2_OVP_FET_MASK, },
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{ .reg_offset = 1, .mask = RT8973A_INT2_OCP_LATCH_MASK, },
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{ .reg_offset = 1, .mask = RT8973A_INT2_OCP_MASK, },
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{ .reg_offset = 1, .mask = RT8973A_INT2_OVP_OCP_MASK, },
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};
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static const struct regmap_irq_chip rt8973a_muic_irq_chip = {
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.name = "rt8973a",
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.status_base = RT8973A_REG_INT1,
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.mask_base = RT8973A_REG_INTM1,
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.mask_invert = false,
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.num_regs = 2,
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.irqs = rt8973a_irqs,
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.num_irqs = ARRAY_SIZE(rt8973a_irqs),
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};
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/* Define regmap configuration of RT8973A for I2C communication */
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static bool rt8973a_muic_volatile_reg(struct device *dev, unsigned int reg)
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{
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switch (reg) {
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case RT8973A_REG_INTM1:
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case RT8973A_REG_INTM2:
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return true;
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default:
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break;
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}
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return false;
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}
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static const struct regmap_config rt8973a_muic_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.volatile_reg = rt8973a_muic_volatile_reg,
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.max_register = RT8973A_REG_END,
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};
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/* Change DM_CON/DP_CON/VBUSIN switch according to cable type */
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static int rt8973a_muic_set_path(struct rt8973a_muic_info *info,
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unsigned int con_sw, bool attached)
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{
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int ret;
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/*
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* Don't need to set h/w path according to cable type
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* if Auto-configuration mode of CONTROL1 register is true.
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*/
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if (info->auto_config)
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return 0;
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if (!attached)
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con_sw = DM_DP_SWITCH_UART;
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switch (con_sw) {
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case DM_DP_SWITCH_OPEN:
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case DM_DP_SWITCH_USB:
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case DM_DP_SWITCH_UART:
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ret = regmap_update_bits(info->regmap, RT8973A_REG_MANUAL_SW1,
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RT8973A_REG_MANUAL_SW1_DP_MASK |
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RT8973A_REG_MANUAL_SW1_DM_MASK,
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con_sw);
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if (ret < 0) {
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dev_err(info->dev,
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"cannot update DM_CON/DP_CON switch\n");
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return ret;
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}
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break;
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default:
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dev_err(info->dev, "Unknown DM_CON/DP_CON switch type (%d)\n",
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con_sw);
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return -EINVAL;
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}
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return 0;
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}
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static int rt8973a_muic_get_cable_type(struct rt8973a_muic_info *info)
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{
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unsigned int adc, dev1;
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int ret, cable_type;
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/* Read ADC value according to external cable or button */
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ret = regmap_read(info->regmap, RT8973A_REG_ADC, &adc);
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if (ret) {
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dev_err(info->dev, "failed to read ADC register\n");
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return ret;
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}
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cable_type = adc & RT8973A_REG_ADC_MASK;
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/* Read Device 1 reigster to identify correct cable type */
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ret = regmap_read(info->regmap, RT8973A_REG_DEV1, &dev1);
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if (ret) {
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dev_err(info->dev, "failed to read DEV1 register\n");
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return ret;
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}
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switch (adc) {
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case RT8973A_MUIC_ADC_OPEN:
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if (dev1 & RT8973A_REG_DEV1_USB_MASK)
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cable_type = RT8973A_MUIC_ADC_USB;
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else if (dev1 & RT8973A_REG_DEV1_DCPORT_MASK)
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cable_type = RT8973A_MUIC_ADC_TA;
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else
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cable_type = RT8973A_MUIC_ADC_OPEN;
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break;
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default:
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break;
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}
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return cable_type;
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}
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static int rt8973a_muic_cable_handler(struct rt8973a_muic_info *info,
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enum rt8973a_event_type event)
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{
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static unsigned int prev_cable_type;
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unsigned int con_sw = DM_DP_SWITCH_UART;
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int ret, cable_type;
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unsigned int id;
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bool attached = false;
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switch (event) {
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case RT8973A_EVENT_ATTACH:
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cable_type = rt8973a_muic_get_cable_type(info);
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attached = true;
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break;
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case RT8973A_EVENT_DETACH:
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cable_type = prev_cable_type;
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attached = false;
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break;
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case RT8973A_EVENT_OVP:
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case RT8973A_EVENT_OTP:
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dev_warn(info->dev,
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"happen Over %s issue. Need to disconnect all cables\n",
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event == RT8973A_EVENT_OVP ? "Voltage" : "Temperature");
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cable_type = prev_cable_type;
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attached = false;
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break;
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default:
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dev_err(info->dev,
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"Cannot handle this event (event:%d)\n", event);
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return -EINVAL;
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}
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prev_cable_type = cable_type;
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switch (cable_type) {
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case RT8973A_MUIC_ADC_OTG:
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id = EXTCON_USB_HOST;
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con_sw = DM_DP_SWITCH_USB;
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break;
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case RT8973A_MUIC_ADC_TA:
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id = EXTCON_CHG_USB_DCP;
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con_sw = DM_DP_SWITCH_OPEN;
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break;
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case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB:
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case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB:
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id = EXTCON_JIG;
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con_sw = DM_DP_SWITCH_USB;
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break;
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case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART:
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case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART:
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id = EXTCON_JIG;
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con_sw = DM_DP_SWITCH_UART;
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break;
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case RT8973A_MUIC_ADC_USB:
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id = EXTCON_USB;
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con_sw = DM_DP_SWITCH_USB;
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break;
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case RT8973A_MUIC_ADC_OPEN:
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return 0;
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case RT8973A_MUIC_ADC_UNKNOWN_ACC_1:
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case RT8973A_MUIC_ADC_UNKNOWN_ACC_2:
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case RT8973A_MUIC_ADC_UNKNOWN_ACC_3:
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case RT8973A_MUIC_ADC_UNKNOWN_ACC_4:
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case RT8973A_MUIC_ADC_UNKNOWN_ACC_5:
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dev_warn(info->dev,
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"Unknown accessory type (adc:0x%x)\n", cable_type);
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return 0;
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case RT8973A_MUIC_ADC_AUDIO_SEND_END_BUTTON:
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case RT8973A_MUIC_ADC_AUDIO_REMOTE_S1_BUTTON:
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case RT8973A_MUIC_ADC_AUDIO_REMOTE_S2_BUTTON:
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case RT8973A_MUIC_ADC_AUDIO_REMOTE_S3_BUTTON:
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case RT8973A_MUIC_ADC_AUDIO_REMOTE_S4_BUTTON:
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case RT8973A_MUIC_ADC_AUDIO_REMOTE_S5_BUTTON:
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case RT8973A_MUIC_ADC_AUDIO_REMOTE_S6_BUTTON:
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case RT8973A_MUIC_ADC_AUDIO_REMOTE_S7_BUTTON:
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case RT8973A_MUIC_ADC_AUDIO_REMOTE_S8_BUTTON:
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case RT8973A_MUIC_ADC_AUDIO_REMOTE_S9_BUTTON:
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case RT8973A_MUIC_ADC_AUDIO_REMOTE_S10_BUTTON:
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case RT8973A_MUIC_ADC_AUDIO_REMOTE_S11_BUTTON:
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case RT8973A_MUIC_ADC_AUDIO_REMOTE_S12_BUTTON:
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case RT8973A_MUIC_ADC_AUDIO_TYPE2:
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dev_warn(info->dev,
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"Audio device/button type (adc:0x%x)\n", cable_type);
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return 0;
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case RT8973A_MUIC_ADC_RESERVED_ACC_1:
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case RT8973A_MUIC_ADC_RESERVED_ACC_2:
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case RT8973A_MUIC_ADC_RESERVED_ACC_3:
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case RT8973A_MUIC_ADC_RESERVED_ACC_4:
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case RT8973A_MUIC_ADC_RESERVED_ACC_5:
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case RT8973A_MUIC_ADC_PHONE_POWERED_DEV:
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return 0;
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default:
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dev_err(info->dev,
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"Cannot handle this cable_type (adc:0x%x)\n",
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cable_type);
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return -EINVAL;
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}
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/* 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_state_sync(info->edev, id, attached);
|
|
if (id == EXTCON_USB)
|
|
extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
|
|
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 switching 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];
|
|
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 | IRQF_ONESHOT,
|
|
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;
|
|
}
|
|
|
|
/* 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" },
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(of, rt8973a_dt_match);
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
static int rt8973a_muic_suspend(struct device *dev)
|
|
{
|
|
struct i2c_client *i2c = to_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 = to_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",
|
|
.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");
|