From 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Tue, 21 Feb 2023 18:24:12 -0800 Subject: Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next Pull networking updates from Jakub Kicinski: "Core: - Add dedicated kmem_cache for typical/small skb->head, avoid having to access struct page at kfree time, and improve memory use. - Introduce sysctl to set default RPS configuration for new netdevs. - Define Netlink protocol specification format which can be used to describe messages used by each family and auto-generate parsers. Add tools for generating kernel data structures and uAPI headers. - Expose all net/core sysctls inside netns. - Remove 4s sleep in netpoll if carrier is instantly detected on boot. - Add configurable limit of MDB entries per port, and port-vlan. - Continue populating drop reasons throughout the stack. - Retire a handful of legacy Qdiscs and classifiers. Protocols: - Support IPv4 big TCP (TSO frames larger than 64kB). - Add IP_LOCAL_PORT_RANGE socket option, to control local port range on socket by socket basis. - Track and report in procfs number of MPTCP sockets used. - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path manager. - IPv6: don't check net.ipv6.route.max_size and rely on garbage collection to free memory (similarly to IPv4). - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986). - ICMP: add per-rate limit counters. - Add support for user scanning requests in ieee802154. - Remove static WEP support. - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate reporting. - WiFi 7 EHT channel puncturing support (client & AP). BPF: - Add a rbtree data structure following the "next-gen data structure" precedent set by recently added linked list, that is, by using kfunc + kptr instead of adding a new BPF map type. - Expose XDP hints via kfuncs with initial support for RX hash and timestamp metadata. - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to better support decap on GRE tunnel devices not operating in collect metadata. - Improve x86 JIT's codegen for PROBE_MEM runtime error checks. - Remove the need for trace_printk_lock for bpf_trace_printk and bpf_trace_vprintk helpers. - Extend libbpf's bpf_tracing.h support for tracing arguments of kprobes/uprobes and syscall as a special case. - Significantly reduce the search time for module symbols by livepatch and BPF. - Enable cpumasks to be used as kptrs, which is useful for tracing programs tracking which tasks end up running on which CPUs in different time intervals. - Add support for BPF trampoline on s390x and riscv64. - Add capability to export the XDP features supported by the NIC. - Add __bpf_kfunc tag for marking kernel functions as kfuncs. - Add cgroup.memory=nobpf kernel parameter option to disable BPF memory accounting for container environments. Netfilter: - Remove the CLUSTERIP target. It has been marked as obsolete for years, and we still have WARN splats wrt races of the out-of-band /proc interface installed by this target. - Add 'destroy' commands to nf_tables. They are identical to the existing 'delete' commands, but do not return an error if the referenced object (set, chain, rule...) did not exist. Driver API: - Improve cpumask_local_spread() locality to help NICs set the right IRQ affinity on AMD platforms. - Separate C22 and C45 MDIO bus transactions more clearly. - Introduce new DCB table to control DSCP rewrite on egress. - Support configuration of Physical Layer Collision Avoidance (PLCA) Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of shared medium Ethernet. - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing preemption of low priority frames by high priority frames. - Add support for controlling MACSec offload using netlink SET. - Rework devlink instance refcounts to allow registration and de-registration under the instance lock. Split the code into multiple files, drop some of the unnecessarily granular locks and factor out common parts of netlink operation handling. - Add TX frame aggregation parameters (for USB drivers). - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning messages with notifications for debug. - Allow offloading of UDP NEW connections via act_ct. - Add support for per action HW stats in TC. - Support hardware miss to TC action (continue processing in SW from a specific point in the action chain). - Warn if old Wireless Extension user space interface is used with modern cfg80211/mac80211 drivers. Do not support Wireless Extensions for Wi-Fi 7 devices at all. Everyone should switch to using nl80211 interface instead. - Improve the CAN bit timing configuration. Use extack to return error messages directly to user space, update the SJW handling, including the definition of a new default value that will benefit CAN-FD controllers, by increasing their oscillator tolerance. New hardware / drivers: - Ethernet: - nVidia BlueField-3 support (control traffic driver) - Ethernet support for imx93 SoCs - Motorcomm yt8531 gigabit Ethernet PHY - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA) - Microchip LAN8841 PHY (incl. cable diagnostics and PTP) - Amlogic gxl MDIO mux - WiFi: - RealTek RTL8188EU (rtl8xxxu) - Qualcomm Wi-Fi 7 devices (ath12k) - CAN: - Renesas R-Car V4H Drivers: - Bluetooth: - Set Per Platform Antenna Gain (PPAG) for Intel controllers. - Ethernet NICs: - Intel (1G, igc): - support TSN / Qbv / packet scheduling features of i226 model - Intel (100G, ice): - use GNSS subsystem instead of TTY - multi-buffer XDP support - extend support for GPIO pins to E823 devices - nVidia/Mellanox: - update the shared buffer configuration on PFC commands - implement PTP adjphase function for HW offset control - TC support for Geneve and GRE with VF tunnel offload - more efficient crypto key management method - multi-port eswitch support - Netronome/Corigine: - add DCB IEEE support - support IPsec offloading for NFP3800 - Freescale/NXP (enetc): - support XDP_REDIRECT for XDP non-linear buffers - improve reconfig, avoid link flap and waiting for idle - support MAC Merge layer - Other NICs: - sfc/ef100: add basic devlink support for ef100 - ionic: rx_push mode operation (writing descriptors via MMIO) - bnxt: use the auxiliary bus abstraction for RDMA - r8169: disable ASPM and reset bus in case of tx timeout - cpsw: support QSGMII mode for J721e CPSW9G - cpts: support pulse-per-second output - ngbe: add an mdio bus driver - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing - r8152: handle devices with FW with NCM support - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation - virtio-net: support multi buffer XDP - virtio/vsock: replace virtio_vsock_pkt with sk_buff - tsnep: XDP support - Ethernet high-speed switches: - nVidia/Mellanox (mlxsw): - add support for latency TLV (in FW control messages) - Microchip (sparx5): - separate explicit and implicit traffic forwarding rules, make the implicit rules always active - add support for egress DSCP rewrite - IS0 VCAP support (Ingress Classification) - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS etc.) - ES2 VCAP support (Egress Access Control) - support for Per-Stream Filtering and Policing (802.1Q, 8.6.5.1) - Ethernet embedded switches: - Marvell (mv88e6xxx): - add MAB (port auth) offload support - enable PTP receive for mv88e6390 - NXP (ocelot): - support MAC Merge layer - support for the the vsc7512 internal copper phys - Microchip: - lan9303: convert to PHYLINK - lan966x: support TC flower filter statistics - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x - lan937x: support Credit Based Shaper configuration - ksz9477: support Energy Efficient Ethernet - other: - qca8k: convert to regmap read/write API, use bulk operations - rswitch: Improve TX timestamp accuracy - Intel WiFi (iwlwifi): - EHT (Wi-Fi 7) rate reporting - STEP equalizer support: transfer some STEP (connection to radio on platforms with integrated wifi) related parameters from the BIOS to the firmware. - Qualcomm 802.11ax WiFi (ath11k): - IPQ5018 support - Fine Timing Measurement (FTM) responder role support - channel 177 support - MediaTek WiFi (mt76): - per-PHY LED support - mt7996: EHT (Wi-Fi 7) support - Wireless Ethernet Dispatch (WED) reset support - switch to using page pool allocator - RealTek WiFi (rtw89): - support new version of Bluetooth co-existance - Mobile: - rmnet: support TX aggregation" * tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits) page_pool: add a comment explaining the fragment counter usage net: ethtool: fix __ethtool_dev_mm_supported() implementation ethtool: pse-pd: Fix double word in comments xsk: add linux/vmalloc.h to xsk.c sefltests: netdevsim: wait for devlink instance after netns removal selftest: fib_tests: Always cleanup before exit net/mlx5e: Align IPsec ASO result memory to be as required by hardware net/mlx5e: TC, Set CT miss to the specific ct action instance net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG net/mlx5: Refactor tc miss handling to a single function net/mlx5: Kconfig: Make tc offload depend on tc skb extension net/sched: flower: Support hardware miss to tc action net/sched: flower: Move filter handle initialization earlier net/sched: cls_api: Support hardware miss to tc action net/sched: Rename user cookie and act cookie sfc: fix builds without CONFIG_RTC_LIB sfc: clean up some inconsistent indentings net/mlx4_en: Introduce flexible array to silence overflow warning net: lan966x: Fix possible deadlock inside PTP net/ulp: Remove redundant ->clone() test in inet_clone_ulp(). ... --- drivers/power/supply/lp8727_charger.c | 626 ++++++++++++++++++++++++++++++++++ 1 file changed, 626 insertions(+) create mode 100644 drivers/power/supply/lp8727_charger.c (limited to 'drivers/power/supply/lp8727_charger.c') diff --git a/drivers/power/supply/lp8727_charger.c b/drivers/power/supply/lp8727_charger.c new file mode 100644 index 000000000..e6c21377d --- /dev/null +++ b/drivers/power/supply/lp8727_charger.c @@ -0,0 +1,626 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Driver for LP8727 Micro/Mini USB IC with integrated charger + * + * Copyright (C) 2011 Texas Instruments + * Copyright (C) 2011 National Semiconductor + */ + +#include +#include +#include +#include +#include +#include +#include + +#define LP8788_NUM_INTREGS 2 +#define DEFAULT_DEBOUNCE_MSEC 270 + +/* Registers */ +#define LP8727_CTRL1 0x1 +#define LP8727_CTRL2 0x2 +#define LP8727_SWCTRL 0x3 +#define LP8727_INT1 0x4 +#define LP8727_INT2 0x5 +#define LP8727_STATUS1 0x6 +#define LP8727_STATUS2 0x7 +#define LP8727_CHGCTRL2 0x9 + +/* CTRL1 register */ +#define LP8727_CP_EN BIT(0) +#define LP8727_ADC_EN BIT(1) +#define LP8727_ID200_EN BIT(4) + +/* CTRL2 register */ +#define LP8727_CHGDET_EN BIT(1) +#define LP8727_INT_EN BIT(6) + +/* SWCTRL register */ +#define LP8727_SW_DM1_DM (0x0 << 0) +#define LP8727_SW_DM1_HiZ (0x7 << 0) +#define LP8727_SW_DP2_DP (0x0 << 3) +#define LP8727_SW_DP2_HiZ (0x7 << 3) + +/* INT1 register */ +#define LP8727_IDNO (0xF << 0) +#define LP8727_VBUS BIT(4) + +/* STATUS1 register */ +#define LP8727_CHGSTAT (3 << 4) +#define LP8727_CHPORT BIT(6) +#define LP8727_DCPORT BIT(7) +#define LP8727_STAT_EOC 0x30 + +/* STATUS2 register */ +#define LP8727_TEMP_STAT (3 << 5) +#define LP8727_TEMP_SHIFT 5 + +/* CHGCTRL2 register */ +#define LP8727_ICHG_SHIFT 4 + +enum lp8727_dev_id { + LP8727_ID_NONE, + LP8727_ID_TA, + LP8727_ID_DEDICATED_CHG, + LP8727_ID_USB_CHG, + LP8727_ID_USB_DS, + LP8727_ID_MAX, +}; + +enum lp8727_die_temp { + LP8788_TEMP_75C, + LP8788_TEMP_95C, + LP8788_TEMP_115C, + LP8788_TEMP_135C, +}; + +struct lp8727_psy { + struct power_supply *ac; + struct power_supply *usb; + struct power_supply *batt; +}; + +struct lp8727_chg { + struct device *dev; + struct i2c_client *client; + struct mutex xfer_lock; + struct lp8727_psy *psy; + struct lp8727_platform_data *pdata; + + /* Charger Data */ + enum lp8727_dev_id devid; + struct lp8727_chg_param *chg_param; + + /* Interrupt Handling */ + int irq; + struct delayed_work work; + unsigned long debounce_jiffies; +}; + +static int lp8727_read_bytes(struct lp8727_chg *pchg, u8 reg, u8 *data, u8 len) +{ + s32 ret; + + mutex_lock(&pchg->xfer_lock); + ret = i2c_smbus_read_i2c_block_data(pchg->client, reg, len, data); + mutex_unlock(&pchg->xfer_lock); + + return (ret != len) ? -EIO : 0; +} + +static inline int lp8727_read_byte(struct lp8727_chg *pchg, u8 reg, u8 *data) +{ + return lp8727_read_bytes(pchg, reg, data, 1); +} + +static int lp8727_write_byte(struct lp8727_chg *pchg, u8 reg, u8 data) +{ + int ret; + + mutex_lock(&pchg->xfer_lock); + ret = i2c_smbus_write_byte_data(pchg->client, reg, data); + mutex_unlock(&pchg->xfer_lock); + + return ret; +} + +static bool lp8727_is_charger_attached(const char *name, int id) +{ + if (!strcmp(name, "ac")) + return id == LP8727_ID_TA || id == LP8727_ID_DEDICATED_CHG; + else if (!strcmp(name, "usb")) + return id == LP8727_ID_USB_CHG; + + return id >= LP8727_ID_TA && id <= LP8727_ID_USB_CHG; +} + +static int lp8727_init_device(struct lp8727_chg *pchg) +{ + u8 val; + int ret; + u8 intstat[LP8788_NUM_INTREGS]; + + /* clear interrupts */ + ret = lp8727_read_bytes(pchg, LP8727_INT1, intstat, LP8788_NUM_INTREGS); + if (ret) + return ret; + + val = LP8727_ID200_EN | LP8727_ADC_EN | LP8727_CP_EN; + ret = lp8727_write_byte(pchg, LP8727_CTRL1, val); + if (ret) + return ret; + + val = LP8727_INT_EN | LP8727_CHGDET_EN; + return lp8727_write_byte(pchg, LP8727_CTRL2, val); +} + +static int lp8727_is_dedicated_charger(struct lp8727_chg *pchg) +{ + u8 val; + + lp8727_read_byte(pchg, LP8727_STATUS1, &val); + return val & LP8727_DCPORT; +} + +static int lp8727_is_usb_charger(struct lp8727_chg *pchg) +{ + u8 val; + + lp8727_read_byte(pchg, LP8727_STATUS1, &val); + return val & LP8727_CHPORT; +} + +static inline void lp8727_ctrl_switch(struct lp8727_chg *pchg, u8 sw) +{ + lp8727_write_byte(pchg, LP8727_SWCTRL, sw); +} + +static void lp8727_id_detection(struct lp8727_chg *pchg, u8 id, int vbusin) +{ + struct lp8727_platform_data *pdata = pchg->pdata; + u8 devid = LP8727_ID_NONE; + u8 swctrl = LP8727_SW_DM1_HiZ | LP8727_SW_DP2_HiZ; + + switch (id) { + case 0x5: + devid = LP8727_ID_TA; + pchg->chg_param = pdata ? pdata->ac : NULL; + break; + case 0xB: + if (lp8727_is_dedicated_charger(pchg)) { + pchg->chg_param = pdata ? pdata->ac : NULL; + devid = LP8727_ID_DEDICATED_CHG; + } else if (lp8727_is_usb_charger(pchg)) { + pchg->chg_param = pdata ? pdata->usb : NULL; + devid = LP8727_ID_USB_CHG; + swctrl = LP8727_SW_DM1_DM | LP8727_SW_DP2_DP; + } else if (vbusin) { + devid = LP8727_ID_USB_DS; + swctrl = LP8727_SW_DM1_DM | LP8727_SW_DP2_DP; + } + break; + default: + devid = LP8727_ID_NONE; + pchg->chg_param = NULL; + break; + } + + pchg->devid = devid; + lp8727_ctrl_switch(pchg, swctrl); +} + +static void lp8727_enable_chgdet(struct lp8727_chg *pchg) +{ + u8 val; + + lp8727_read_byte(pchg, LP8727_CTRL2, &val); + val |= LP8727_CHGDET_EN; + lp8727_write_byte(pchg, LP8727_CTRL2, val); +} + +static void lp8727_delayed_func(struct work_struct *_work) +{ + struct lp8727_chg *pchg = container_of(_work, struct lp8727_chg, + work.work); + u8 intstat[LP8788_NUM_INTREGS]; + u8 idno; + u8 vbus; + + if (lp8727_read_bytes(pchg, LP8727_INT1, intstat, LP8788_NUM_INTREGS)) { + dev_err(pchg->dev, "can not read INT registers\n"); + return; + } + + idno = intstat[0] & LP8727_IDNO; + vbus = intstat[0] & LP8727_VBUS; + + lp8727_id_detection(pchg, idno, vbus); + lp8727_enable_chgdet(pchg); + + power_supply_changed(pchg->psy->ac); + power_supply_changed(pchg->psy->usb); + power_supply_changed(pchg->psy->batt); +} + +static irqreturn_t lp8727_isr_func(int irq, void *ptr) +{ + struct lp8727_chg *pchg = ptr; + + schedule_delayed_work(&pchg->work, pchg->debounce_jiffies); + return IRQ_HANDLED; +} + +static int lp8727_setup_irq(struct lp8727_chg *pchg) +{ + int ret; + int irq = pchg->client->irq; + unsigned delay_msec = pchg->pdata ? pchg->pdata->debounce_msec : + DEFAULT_DEBOUNCE_MSEC; + + INIT_DELAYED_WORK(&pchg->work, lp8727_delayed_func); + + if (irq <= 0) { + dev_warn(pchg->dev, "invalid irq number: %d\n", irq); + return 0; + } + + ret = request_threaded_irq(irq, NULL, lp8727_isr_func, + IRQF_TRIGGER_FALLING | IRQF_ONESHOT, + "lp8727_irq", pchg); + + if (ret) + return ret; + + pchg->irq = irq; + pchg->debounce_jiffies = msecs_to_jiffies(delay_msec); + + return 0; +} + +static void lp8727_release_irq(struct lp8727_chg *pchg) +{ + cancel_delayed_work_sync(&pchg->work); + + if (pchg->irq) + free_irq(pchg->irq, pchg); +} + +static enum power_supply_property lp8727_charger_prop[] = { + POWER_SUPPLY_PROP_ONLINE, +}; + +static enum power_supply_property lp8727_battery_prop[] = { + POWER_SUPPLY_PROP_STATUS, + POWER_SUPPLY_PROP_HEALTH, + POWER_SUPPLY_PROP_PRESENT, + POWER_SUPPLY_PROP_VOLTAGE_NOW, + POWER_SUPPLY_PROP_CAPACITY, + POWER_SUPPLY_PROP_TEMP, +}; + +static char *battery_supplied_to[] = { + "main_batt", +}; + +static int lp8727_charger_get_property(struct power_supply *psy, + enum power_supply_property psp, + union power_supply_propval *val) +{ + struct lp8727_chg *pchg = dev_get_drvdata(psy->dev.parent); + + if (psp != POWER_SUPPLY_PROP_ONLINE) + return -EINVAL; + + val->intval = lp8727_is_charger_attached(psy->desc->name, pchg->devid); + + return 0; +} + +static bool lp8727_is_high_temperature(enum lp8727_die_temp temp) +{ + switch (temp) { + case LP8788_TEMP_95C: + case LP8788_TEMP_115C: + case LP8788_TEMP_135C: + return true; + default: + return false; + } +} + +static int lp8727_battery_get_property(struct power_supply *psy, + enum power_supply_property psp, + union power_supply_propval *val) +{ + struct lp8727_chg *pchg = dev_get_drvdata(psy->dev.parent); + struct lp8727_platform_data *pdata = pchg->pdata; + enum lp8727_die_temp temp; + u8 read; + + switch (psp) { + case POWER_SUPPLY_PROP_STATUS: + if (!lp8727_is_charger_attached(psy->desc->name, pchg->devid)) { + val->intval = POWER_SUPPLY_STATUS_DISCHARGING; + return 0; + } + + lp8727_read_byte(pchg, LP8727_STATUS1, &read); + + val->intval = (read & LP8727_CHGSTAT) == LP8727_STAT_EOC ? + POWER_SUPPLY_STATUS_FULL : + POWER_SUPPLY_STATUS_CHARGING; + break; + case POWER_SUPPLY_PROP_HEALTH: + lp8727_read_byte(pchg, LP8727_STATUS2, &read); + temp = (read & LP8727_TEMP_STAT) >> LP8727_TEMP_SHIFT; + + val->intval = lp8727_is_high_temperature(temp) ? + POWER_SUPPLY_HEALTH_OVERHEAT : + POWER_SUPPLY_HEALTH_GOOD; + break; + case POWER_SUPPLY_PROP_PRESENT: + if (!pdata) + return -EINVAL; + + if (pdata->get_batt_present) + val->intval = pdata->get_batt_present(); + break; + case POWER_SUPPLY_PROP_VOLTAGE_NOW: + if (!pdata) + return -EINVAL; + + if (pdata->get_batt_level) + val->intval = pdata->get_batt_level(); + break; + case POWER_SUPPLY_PROP_CAPACITY: + if (!pdata) + return -EINVAL; + + if (pdata->get_batt_capacity) + val->intval = pdata->get_batt_capacity(); + break; + case POWER_SUPPLY_PROP_TEMP: + if (!pdata) + return -EINVAL; + + if (pdata->get_batt_temp) + val->intval = pdata->get_batt_temp(); + break; + default: + break; + } + + return 0; +} + +static void lp8727_charger_changed(struct power_supply *psy) +{ + struct lp8727_chg *pchg = dev_get_drvdata(psy->dev.parent); + u8 eoc_level; + u8 ichg; + u8 val; + + /* skip if no charger exists */ + if (!lp8727_is_charger_attached(psy->desc->name, pchg->devid)) + return; + + /* update charging parameters */ + if (pchg->chg_param) { + eoc_level = pchg->chg_param->eoc_level; + ichg = pchg->chg_param->ichg; + val = (ichg << LP8727_ICHG_SHIFT) | eoc_level; + lp8727_write_byte(pchg, LP8727_CHGCTRL2, val); + } +} + +static const struct power_supply_desc lp8727_ac_desc = { + .name = "ac", + .type = POWER_SUPPLY_TYPE_MAINS, + .properties = lp8727_charger_prop, + .num_properties = ARRAY_SIZE(lp8727_charger_prop), + .get_property = lp8727_charger_get_property, +}; + +static const struct power_supply_desc lp8727_usb_desc = { + .name = "usb", + .type = POWER_SUPPLY_TYPE_USB, + .properties = lp8727_charger_prop, + .num_properties = ARRAY_SIZE(lp8727_charger_prop), + .get_property = lp8727_charger_get_property, +}; + +static const struct power_supply_desc lp8727_batt_desc = { + .name = "main_batt", + .type = POWER_SUPPLY_TYPE_BATTERY, + .properties = lp8727_battery_prop, + .num_properties = ARRAY_SIZE(lp8727_battery_prop), + .get_property = lp8727_battery_get_property, + .external_power_changed = lp8727_charger_changed, +}; + +static int lp8727_register_psy(struct lp8727_chg *pchg) +{ + struct power_supply_config psy_cfg = {}; /* Only for ac and usb */ + struct lp8727_psy *psy; + + psy = devm_kzalloc(pchg->dev, sizeof(*psy), GFP_KERNEL); + if (!psy) + return -ENOMEM; + + pchg->psy = psy; + + psy_cfg.supplied_to = battery_supplied_to; + psy_cfg.num_supplicants = ARRAY_SIZE(battery_supplied_to); + + psy->ac = power_supply_register(pchg->dev, &lp8727_ac_desc, &psy_cfg); + if (IS_ERR(psy->ac)) + goto err_psy_ac; + + psy->usb = power_supply_register(pchg->dev, &lp8727_usb_desc, + &psy_cfg); + if (IS_ERR(psy->usb)) + goto err_psy_usb; + + psy->batt = power_supply_register(pchg->dev, &lp8727_batt_desc, NULL); + if (IS_ERR(psy->batt)) + goto err_psy_batt; + + return 0; + +err_psy_batt: + power_supply_unregister(psy->usb); +err_psy_usb: + power_supply_unregister(psy->ac); +err_psy_ac: + return -EPERM; +} + +static void lp8727_unregister_psy(struct lp8727_chg *pchg) +{ + struct lp8727_psy *psy = pchg->psy; + + if (!psy) + return; + + power_supply_unregister(psy->ac); + power_supply_unregister(psy->usb); + power_supply_unregister(psy->batt); +} + +#ifdef CONFIG_OF +static struct lp8727_chg_param +*lp8727_parse_charge_pdata(struct device *dev, struct device_node *np) +{ + struct lp8727_chg_param *param; + + param = devm_kzalloc(dev, sizeof(*param), GFP_KERNEL); + if (!param) + goto out; + + of_property_read_u8(np, "eoc-level", (u8 *)¶m->eoc_level); + of_property_read_u8(np, "charging-current", (u8 *)¶m->ichg); +out: + return param; +} + +static struct lp8727_platform_data *lp8727_parse_dt(struct device *dev) +{ + struct device_node *np = dev->of_node; + struct device_node *child; + struct lp8727_platform_data *pdata; + const char *type; + + pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) + return ERR_PTR(-ENOMEM); + + of_property_read_u32(np, "debounce-ms", &pdata->debounce_msec); + + /* If charging parameter is not defined, just skip parsing the dt */ + if (of_get_child_count(np) == 0) + return pdata; + + for_each_child_of_node(np, child) { + of_property_read_string(child, "charger-type", &type); + + if (!strcmp(type, "ac")) + pdata->ac = lp8727_parse_charge_pdata(dev, child); + + if (!strcmp(type, "usb")) + pdata->usb = lp8727_parse_charge_pdata(dev, child); + } + + return pdata; +} +#else +static struct lp8727_platform_data *lp8727_parse_dt(struct device *dev) +{ + return NULL; +} +#endif + +static int lp8727_probe(struct i2c_client *cl) +{ + struct lp8727_chg *pchg; + struct lp8727_platform_data *pdata; + int ret; + + if (!i2c_check_functionality(cl->adapter, I2C_FUNC_SMBUS_I2C_BLOCK)) + return -EIO; + + if (cl->dev.of_node) { + pdata = lp8727_parse_dt(&cl->dev); + if (IS_ERR(pdata)) + return PTR_ERR(pdata); + } else { + pdata = dev_get_platdata(&cl->dev); + } + + pchg = devm_kzalloc(&cl->dev, sizeof(*pchg), GFP_KERNEL); + if (!pchg) + return -ENOMEM; + + pchg->client = cl; + pchg->dev = &cl->dev; + pchg->pdata = pdata; + i2c_set_clientdata(cl, pchg); + + mutex_init(&pchg->xfer_lock); + + ret = lp8727_init_device(pchg); + if (ret) { + dev_err(pchg->dev, "i2c communication err: %d", ret); + return ret; + } + + ret = lp8727_register_psy(pchg); + if (ret) { + dev_err(pchg->dev, "power supplies register err: %d", ret); + return ret; + } + + ret = lp8727_setup_irq(pchg); + if (ret) { + dev_err(pchg->dev, "irq handler err: %d", ret); + lp8727_unregister_psy(pchg); + return ret; + } + + return 0; +} + +static void lp8727_remove(struct i2c_client *cl) +{ + struct lp8727_chg *pchg = i2c_get_clientdata(cl); + + lp8727_release_irq(pchg); + lp8727_unregister_psy(pchg); +} + +static const struct of_device_id lp8727_dt_ids[] = { + { .compatible = "ti,lp8727", }, + { } +}; +MODULE_DEVICE_TABLE(of, lp8727_dt_ids); + +static const struct i2c_device_id lp8727_ids[] = { + {"lp8727", 0}, + { } +}; +MODULE_DEVICE_TABLE(i2c, lp8727_ids); + +static struct i2c_driver lp8727_driver = { + .driver = { + .name = "lp8727", + .of_match_table = of_match_ptr(lp8727_dt_ids), + }, + .probe_new = lp8727_probe, + .remove = lp8727_remove, + .id_table = lp8727_ids, +}; +module_i2c_driver(lp8727_driver); + +MODULE_DESCRIPTION("TI/National Semiconductor LP8727 charger driver"); +MODULE_AUTHOR("Milo Kim , Daniel Jeong "); +MODULE_LICENSE("GPL"); -- cgit v1.2.3