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/regulator/max8998.c | 826 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 826 insertions(+) create mode 100644 drivers/regulator/max8998.c (limited to 'drivers/regulator/max8998.c') diff --git a/drivers/regulator/max8998.c b/drivers/regulator/max8998.c new file mode 100644 index 000000000..ac69bdd39 --- /dev/null +++ b/drivers/regulator/max8998.c @@ -0,0 +1,826 @@ +// SPDX-License-Identifier: GPL-2.0+ +// +// max8998.c - Voltage regulator driver for the Maxim 8998 +// +// Copyright (C) 2009-2010 Samsung Electronics +// Kyungmin Park +// Marek Szyprowski + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +struct max8998_data { + struct device *dev; + struct max8998_dev *iodev; + int num_regulators; + u8 buck1_vol[4]; /* voltages for selection */ + u8 buck2_vol[2]; + unsigned int buck1_idx; /* index to last changed voltage */ + /* value in a set */ + unsigned int buck2_idx; +}; + +static const unsigned int charger_current_table[] = { + 90000, 380000, 475000, 550000, 570000, 600000, 700000, 800000, +}; + +static int max8998_get_enable_register(struct regulator_dev *rdev, + int *reg, int *shift) +{ + int ldo = rdev_get_id(rdev); + + switch (ldo) { + case MAX8998_LDO2 ... MAX8998_LDO5: + *reg = MAX8998_REG_ONOFF1; + *shift = 3 - (ldo - MAX8998_LDO2); + break; + case MAX8998_LDO6 ... MAX8998_LDO13: + *reg = MAX8998_REG_ONOFF2; + *shift = 7 - (ldo - MAX8998_LDO6); + break; + case MAX8998_LDO14 ... MAX8998_LDO17: + *reg = MAX8998_REG_ONOFF3; + *shift = 7 - (ldo - MAX8998_LDO14); + break; + case MAX8998_BUCK1 ... MAX8998_BUCK4: + *reg = MAX8998_REG_ONOFF1; + *shift = 7 - (ldo - MAX8998_BUCK1); + break; + case MAX8998_EN32KHZ_AP ... MAX8998_ENVICHG: + *reg = MAX8998_REG_ONOFF4; + *shift = 7 - (ldo - MAX8998_EN32KHZ_AP); + break; + case MAX8998_ESAFEOUT1 ... MAX8998_ESAFEOUT2: + *reg = MAX8998_REG_CHGR2; + *shift = 7 - (ldo - MAX8998_ESAFEOUT1); + break; + case MAX8998_CHARGER: + *reg = MAX8998_REG_CHGR2; + *shift = 0; + break; + default: + return -EINVAL; + } + + return 0; +} + +static int max8998_ldo_is_enabled(struct regulator_dev *rdev) +{ + struct max8998_data *max8998 = rdev_get_drvdata(rdev); + struct i2c_client *i2c = max8998->iodev->i2c; + int ret, reg, shift = 8; + u8 val; + + ret = max8998_get_enable_register(rdev, ®, &shift); + if (ret) + return ret; + + ret = max8998_read_reg(i2c, reg, &val); + if (ret) + return ret; + + return val & (1 << shift); +} + +static int max8998_ldo_is_enabled_inverted(struct regulator_dev *rdev) +{ + return (!max8998_ldo_is_enabled(rdev)); +} + +static int max8998_ldo_enable(struct regulator_dev *rdev) +{ + struct max8998_data *max8998 = rdev_get_drvdata(rdev); + struct i2c_client *i2c = max8998->iodev->i2c; + int reg, shift = 8, ret; + + ret = max8998_get_enable_register(rdev, ®, &shift); + if (ret) + return ret; + + return max8998_update_reg(i2c, reg, 1<iodev->i2c; + int reg, shift = 8, ret; + + ret = max8998_get_enable_register(rdev, ®, &shift); + if (ret) + return ret; + + return max8998_update_reg(i2c, reg, 0, 1<buck1_idx; + break; + case MAX8998_BUCK2: + reg = MAX8998_REG_BUCK2_VOLTAGE1 + max8998->buck2_idx; + break; + case MAX8998_BUCK3: + reg = MAX8998_REG_BUCK3; + break; + case MAX8998_BUCK4: + reg = MAX8998_REG_BUCK4; + break; + default: + return -EINVAL; + } + + *_reg = reg; + *_shift = shift; + *_mask = mask; + + return 0; +} + +static int max8998_get_voltage_sel(struct regulator_dev *rdev) +{ + struct max8998_data *max8998 = rdev_get_drvdata(rdev); + struct i2c_client *i2c = max8998->iodev->i2c; + int reg, shift = 0, mask, ret; + u8 val; + + ret = max8998_get_voltage_register(rdev, ®, &shift, &mask); + if (ret) + return ret; + + ret = max8998_read_reg(i2c, reg, &val); + if (ret) + return ret; + + val >>= shift; + val &= mask; + + return val; +} + +static int max8998_set_voltage_ldo_sel(struct regulator_dev *rdev, + unsigned selector) +{ + struct max8998_data *max8998 = rdev_get_drvdata(rdev); + struct i2c_client *i2c = max8998->iodev->i2c; + int reg, shift = 0, mask, ret; + + ret = max8998_get_voltage_register(rdev, ®, &shift, &mask); + if (ret) + return ret; + + ret = max8998_update_reg(i2c, reg, selector<> 1) & 0x1); +} + +static inline void buck2_gpio_set(int gpio, int v) +{ + gpio_set_value(gpio, v & 0x1); +} + +static int max8998_set_voltage_buck_sel(struct regulator_dev *rdev, + unsigned selector) +{ + struct max8998_data *max8998 = rdev_get_drvdata(rdev); + struct max8998_platform_data *pdata = max8998->iodev->pdata; + struct i2c_client *i2c = max8998->iodev->i2c; + int buck = rdev_get_id(rdev); + int reg, shift = 0, mask, ret, j; + static u8 buck1_last_val; + + ret = max8998_get_voltage_register(rdev, ®, &shift, &mask); + if (ret) + return ret; + + switch (buck) { + case MAX8998_BUCK1: + dev_dbg(max8998->dev, + "BUCK1, selector:%d, buck1_vol1:%d, buck1_vol2:%d\n" + "buck1_vol3:%d, buck1_vol4:%d\n", + selector, max8998->buck1_vol[0], max8998->buck1_vol[1], + max8998->buck1_vol[2], max8998->buck1_vol[3]); + + if (gpio_is_valid(pdata->buck1_set1) && + gpio_is_valid(pdata->buck1_set2)) { + + /* check if requested voltage */ + /* value is already defined */ + for (j = 0; j < ARRAY_SIZE(max8998->buck1_vol); j++) { + if (max8998->buck1_vol[j] == selector) { + max8998->buck1_idx = j; + buck1_gpio_set(pdata->buck1_set1, + pdata->buck1_set2, j); + goto buck1_exit; + } + } + + if (pdata->buck_voltage_lock) + return -EINVAL; + + /* no predefine regulator found */ + max8998->buck1_idx = (buck1_last_val % 2) + 2; + dev_dbg(max8998->dev, "max8998->buck1_idx:%d\n", + max8998->buck1_idx); + max8998->buck1_vol[max8998->buck1_idx] = selector; + ret = max8998_get_voltage_register(rdev, ®, + &shift, + &mask); + ret = max8998_write_reg(i2c, reg, selector); + buck1_gpio_set(pdata->buck1_set1, + pdata->buck1_set2, max8998->buck1_idx); + buck1_last_val++; +buck1_exit: + dev_dbg(max8998->dev, "%s: SET1:%d, SET2:%d\n", + i2c->name, gpio_get_value(pdata->buck1_set1), + gpio_get_value(pdata->buck1_set2)); + break; + } else { + ret = max8998_write_reg(i2c, reg, selector); + } + break; + + case MAX8998_BUCK2: + dev_dbg(max8998->dev, + "BUCK2, selector:%d buck2_vol1:%d, buck2_vol2:%d\n", + selector, max8998->buck2_vol[0], max8998->buck2_vol[1]); + if (gpio_is_valid(pdata->buck2_set3)) { + + /* check if requested voltage */ + /* value is already defined */ + for (j = 0; j < ARRAY_SIZE(max8998->buck2_vol); j++) { + if (max8998->buck2_vol[j] == selector) { + max8998->buck2_idx = j; + buck2_gpio_set(pdata->buck2_set3, j); + goto buck2_exit; + } + } + + if (pdata->buck_voltage_lock) + return -EINVAL; + + max8998_get_voltage_register(rdev, + ®, &shift, &mask); + ret = max8998_write_reg(i2c, reg, selector); + max8998->buck2_vol[max8998->buck2_idx] = selector; + buck2_gpio_set(pdata->buck2_set3, max8998->buck2_idx); +buck2_exit: + dev_dbg(max8998->dev, "%s: SET3:%d\n", i2c->name, + gpio_get_value(pdata->buck2_set3)); + } else { + ret = max8998_write_reg(i2c, reg, selector); + } + break; + + case MAX8998_BUCK3: + case MAX8998_BUCK4: + ret = max8998_update_reg(i2c, reg, selector<iodev->i2c; + int buck = rdev_get_id(rdev); + u8 val = 0; + int difference, ret; + + if (buck < MAX8998_BUCK1 || buck > MAX8998_BUCK4) + return -EINVAL; + + /* Voltage stabilization */ + ret = max8998_read_reg(i2c, MAX8998_REG_ONOFF4, &val); + if (ret) + return ret; + + /* lp3974 hasn't got ENRAMP bit - ramp is assumed as true */ + /* MAX8998 has ENRAMP bit implemented, so test it*/ + if (max8998->iodev->type == TYPE_MAX8998 && !(val & MAX8998_ENRAMP)) + return 0; + + difference = (new_selector - old_selector) * rdev->desc->uV_step / 1000; + if (difference > 0) + return DIV_ROUND_UP(difference, (val & 0x0f) + 1); + + return 0; +} + +static int max8998_set_current_limit(struct regulator_dev *rdev, + int min_uA, int max_uA) +{ + struct max8998_data *max8998 = rdev_get_drvdata(rdev); + struct i2c_client *i2c = max8998->iodev->i2c; + unsigned int n_currents = rdev->desc->n_current_limits; + int i, sel = -1; + + if (n_currents == 0) + return -EINVAL; + + if (rdev->desc->curr_table) { + const unsigned int *curr_table = rdev->desc->curr_table; + bool ascend = curr_table[n_currents - 1] > curr_table[0]; + + /* search for closest to maximum */ + if (ascend) { + for (i = n_currents - 1; i >= 0; i--) { + if (min_uA <= curr_table[i] && + curr_table[i] <= max_uA) { + sel = i; + break; + } + } + } else { + for (i = 0; i < n_currents; i++) { + if (min_uA <= curr_table[i] && + curr_table[i] <= max_uA) { + sel = i; + break; + } + } + } + } + + if (sel < 0) + return -EINVAL; + + sel <<= ffs(rdev->desc->csel_mask) - 1; + + return max8998_update_reg(i2c, rdev->desc->csel_reg, + sel, rdev->desc->csel_mask); +} + +static int max8998_get_current_limit(struct regulator_dev *rdev) +{ + struct max8998_data *max8998 = rdev_get_drvdata(rdev); + struct i2c_client *i2c = max8998->iodev->i2c; + u8 val; + int ret; + + ret = max8998_read_reg(i2c, rdev->desc->csel_reg, &val); + if (ret != 0) + return ret; + + val &= rdev->desc->csel_mask; + val >>= ffs(rdev->desc->csel_mask) - 1; + + if (rdev->desc->curr_table) { + if (val >= rdev->desc->n_current_limits) + return -EINVAL; + + return rdev->desc->curr_table[val]; + } + + return -EINVAL; +} + +static const struct regulator_ops max8998_ldo_ops = { + .list_voltage = regulator_list_voltage_linear, + .map_voltage = regulator_map_voltage_linear, + .is_enabled = max8998_ldo_is_enabled, + .enable = max8998_ldo_enable, + .disable = max8998_ldo_disable, + .get_voltage_sel = max8998_get_voltage_sel, + .set_voltage_sel = max8998_set_voltage_ldo_sel, +}; + +static const struct regulator_ops max8998_buck_ops = { + .list_voltage = regulator_list_voltage_linear, + .map_voltage = regulator_map_voltage_linear, + .is_enabled = max8998_ldo_is_enabled, + .enable = max8998_ldo_enable, + .disable = max8998_ldo_disable, + .get_voltage_sel = max8998_get_voltage_sel, + .set_voltage_sel = max8998_set_voltage_buck_sel, + .set_voltage_time_sel = max8998_set_voltage_buck_time_sel, +}; + +static const struct regulator_ops max8998_charger_ops = { + .set_current_limit = max8998_set_current_limit, + .get_current_limit = max8998_get_current_limit, + .is_enabled = max8998_ldo_is_enabled_inverted, + /* Swapped as register is inverted */ + .enable = max8998_ldo_disable, + .disable = max8998_ldo_enable, +}; + +static const struct regulator_ops max8998_others_ops = { + .is_enabled = max8998_ldo_is_enabled, + .enable = max8998_ldo_enable, + .disable = max8998_ldo_disable, +}; + +#define MAX8998_LINEAR_REG(_name, _ops, _min, _step, _max) \ + { \ + .name = #_name, \ + .id = MAX8998_##_name, \ + .ops = _ops, \ + .min_uV = (_min), \ + .uV_step = (_step), \ + .n_voltages = ((_max) - (_min)) / (_step) + 1, \ + .type = REGULATOR_VOLTAGE, \ + .owner = THIS_MODULE, \ + } + +#define MAX8998_CURRENT_REG(_name, _ops, _table, _reg, _mask) \ + { \ + .name = #_name, \ + .id = MAX8998_##_name, \ + .ops = _ops, \ + .curr_table = _table, \ + .n_current_limits = ARRAY_SIZE(_table), \ + .csel_reg = _reg, \ + .csel_mask = _mask, \ + .type = REGULATOR_CURRENT, \ + .owner = THIS_MODULE, \ + } + +#define MAX8998_OTHERS_REG(_name, _id) \ + { \ + .name = #_name, \ + .id = _id, \ + .ops = &max8998_others_ops, \ + .type = REGULATOR_VOLTAGE, \ + .owner = THIS_MODULE, \ + } + +static const struct regulator_desc regulators[] = { + MAX8998_LINEAR_REG(LDO2, &max8998_ldo_ops, 800000, 50000, 1300000), + MAX8998_LINEAR_REG(LDO3, &max8998_ldo_ops, 800000, 50000, 1300000), + MAX8998_LINEAR_REG(LDO4, &max8998_ldo_ops, 1600000, 100000, 3600000), + MAX8998_LINEAR_REG(LDO5, &max8998_ldo_ops, 1600000, 100000, 3600000), + MAX8998_LINEAR_REG(LDO6, &max8998_ldo_ops, 1600000, 100000, 3600000), + MAX8998_LINEAR_REG(LDO7, &max8998_ldo_ops, 1600000, 100000, 3600000), + MAX8998_LINEAR_REG(LDO8, &max8998_ldo_ops, 3000000, 100000, 3600000), + MAX8998_LINEAR_REG(LDO9, &max8998_ldo_ops, 2800000, 100000, 3100000), + MAX8998_LINEAR_REG(LDO10, &max8998_ldo_ops, 950000, 50000, 1300000), + MAX8998_LINEAR_REG(LDO11, &max8998_ldo_ops, 1600000, 100000, 3600000), + MAX8998_LINEAR_REG(LDO12, &max8998_ldo_ops, 800000, 100000, 3300000), + MAX8998_LINEAR_REG(LDO13, &max8998_ldo_ops, 800000, 100000, 3300000), + MAX8998_LINEAR_REG(LDO14, &max8998_ldo_ops, 1200000, 100000, 3300000), + MAX8998_LINEAR_REG(LDO15, &max8998_ldo_ops, 1200000, 100000, 3300000), + MAX8998_LINEAR_REG(LDO16, &max8998_ldo_ops, 1600000, 100000, 3600000), + MAX8998_LINEAR_REG(LDO17, &max8998_ldo_ops, 1600000, 100000, 3600000), + MAX8998_LINEAR_REG(BUCK1, &max8998_buck_ops, 750000, 25000, 1525000), + MAX8998_LINEAR_REG(BUCK2, &max8998_buck_ops, 750000, 25000, 1525000), + MAX8998_LINEAR_REG(BUCK3, &max8998_buck_ops, 1600000, 100000, 3600000), + MAX8998_LINEAR_REG(BUCK4, &max8998_buck_ops, 800000, 100000, 2300000), + MAX8998_OTHERS_REG(EN32KHz-AP, MAX8998_EN32KHZ_AP), + MAX8998_OTHERS_REG(EN32KHz-CP, MAX8998_EN32KHZ_CP), + MAX8998_OTHERS_REG(ENVICHG, MAX8998_ENVICHG), + MAX8998_OTHERS_REG(ESAFEOUT1, MAX8998_ESAFEOUT1), + MAX8998_OTHERS_REG(ESAFEOUT2, MAX8998_ESAFEOUT2), + MAX8998_CURRENT_REG(CHARGER, &max8998_charger_ops, + charger_current_table, MAX8998_REG_CHGR1, 0x7), +}; + +static int max8998_pmic_dt_parse_dvs_gpio(struct max8998_dev *iodev, + struct max8998_platform_data *pdata, + struct device_node *pmic_np) +{ + int gpio; + + gpio = of_get_named_gpio(pmic_np, "max8998,pmic-buck1-dvs-gpios", 0); + if (!gpio_is_valid(gpio)) { + dev_err(iodev->dev, "invalid buck1 gpio[0]: %d\n", gpio); + return -EINVAL; + } + pdata->buck1_set1 = gpio; + + gpio = of_get_named_gpio(pmic_np, "max8998,pmic-buck1-dvs-gpios", 1); + if (!gpio_is_valid(gpio)) { + dev_err(iodev->dev, "invalid buck1 gpio[1]: %d\n", gpio); + return -EINVAL; + } + pdata->buck1_set2 = gpio; + + gpio = of_get_named_gpio(pmic_np, "max8998,pmic-buck2-dvs-gpio", 0); + if (!gpio_is_valid(gpio)) { + dev_err(iodev->dev, "invalid buck 2 gpio: %d\n", gpio); + return -EINVAL; + } + pdata->buck2_set3 = gpio; + + return 0; +} + +static int max8998_pmic_dt_parse_pdata(struct max8998_dev *iodev, + struct max8998_platform_data *pdata) +{ + struct device_node *pmic_np = iodev->dev->of_node; + struct device_node *regulators_np, *reg_np; + struct max8998_regulator_data *rdata; + unsigned int i; + int ret; + + regulators_np = of_get_child_by_name(pmic_np, "regulators"); + if (!regulators_np) { + dev_err(iodev->dev, "could not find regulators sub-node\n"); + return -EINVAL; + } + + /* count the number of regulators to be supported in pmic */ + pdata->num_regulators = of_get_child_count(regulators_np); + + rdata = devm_kcalloc(iodev->dev, + pdata->num_regulators, sizeof(*rdata), + GFP_KERNEL); + if (!rdata) { + of_node_put(regulators_np); + return -ENOMEM; + } + + pdata->regulators = rdata; + for (i = 0; i < ARRAY_SIZE(regulators); ++i) { + reg_np = of_get_child_by_name(regulators_np, + regulators[i].name); + if (!reg_np) + continue; + + rdata->id = regulators[i].id; + rdata->initdata = of_get_regulator_init_data(iodev->dev, + reg_np, + ®ulators[i]); + rdata->reg_node = reg_np; + ++rdata; + } + pdata->num_regulators = rdata - pdata->regulators; + + of_node_put(reg_np); + of_node_put(regulators_np); + + ret = max8998_pmic_dt_parse_dvs_gpio(iodev, pdata, pmic_np); + if (ret) + return -EINVAL; + + if (of_find_property(pmic_np, "max8998,pmic-buck-voltage-lock", NULL)) + pdata->buck_voltage_lock = true; + + ret = of_property_read_u32(pmic_np, + "max8998,pmic-buck1-default-dvs-idx", + &pdata->buck1_default_idx); + if (!ret && pdata->buck1_default_idx >= 4) { + pdata->buck1_default_idx = 0; + dev_warn(iodev->dev, "invalid value for default dvs index, using 0 instead\n"); + } + + ret = of_property_read_u32(pmic_np, + "max8998,pmic-buck2-default-dvs-idx", + &pdata->buck2_default_idx); + if (!ret && pdata->buck2_default_idx >= 2) { + pdata->buck2_default_idx = 0; + dev_warn(iodev->dev, "invalid value for default dvs index, using 0 instead\n"); + } + + ret = of_property_read_u32_array(pmic_np, + "max8998,pmic-buck1-dvs-voltage", + pdata->buck1_voltage, + ARRAY_SIZE(pdata->buck1_voltage)); + if (ret) { + dev_err(iodev->dev, "buck1 voltages not specified\n"); + return -EINVAL; + } + + ret = of_property_read_u32_array(pmic_np, + "max8998,pmic-buck2-dvs-voltage", + pdata->buck2_voltage, + ARRAY_SIZE(pdata->buck2_voltage)); + if (ret) { + dev_err(iodev->dev, "buck2 voltages not specified\n"); + return -EINVAL; + } + + return 0; +} + +static int max8998_pmic_probe(struct platform_device *pdev) +{ + struct max8998_dev *iodev = dev_get_drvdata(pdev->dev.parent); + struct max8998_platform_data *pdata = iodev->pdata; + struct regulator_config config = { }; + struct regulator_dev *rdev; + struct max8998_data *max8998; + struct i2c_client *i2c; + int i, ret; + unsigned int v; + + if (!pdata) { + dev_err(pdev->dev.parent, "No platform init data supplied\n"); + return -ENODEV; + } + + if (IS_ENABLED(CONFIG_OF) && iodev->dev->of_node) { + ret = max8998_pmic_dt_parse_pdata(iodev, pdata); + if (ret) + return ret; + } + + max8998 = devm_kzalloc(&pdev->dev, sizeof(struct max8998_data), + GFP_KERNEL); + if (!max8998) + return -ENOMEM; + + max8998->dev = &pdev->dev; + max8998->iodev = iodev; + max8998->num_regulators = pdata->num_regulators; + platform_set_drvdata(pdev, max8998); + i2c = max8998->iodev->i2c; + + max8998->buck1_idx = pdata->buck1_default_idx; + max8998->buck2_idx = pdata->buck2_default_idx; + + /* NOTE: */ + /* For unused GPIO NOT marked as -1 (thereof equal to 0) WARN_ON */ + /* will be displayed */ + + /* Check if MAX8998 voltage selection GPIOs are defined */ + if (gpio_is_valid(pdata->buck1_set1) && + gpio_is_valid(pdata->buck1_set2)) { + /* Check if SET1 is not equal to 0 */ + if (!pdata->buck1_set1) { + dev_err(&pdev->dev, + "MAX8998 SET1 GPIO defined as 0 !\n"); + WARN_ON(!pdata->buck1_set1); + return -EIO; + } + /* Check if SET2 is not equal to 0 */ + if (!pdata->buck1_set2) { + dev_err(&pdev->dev, + "MAX8998 SET2 GPIO defined as 0 !\n"); + WARN_ON(!pdata->buck1_set2); + return -EIO; + } + + gpio_request(pdata->buck1_set1, "MAX8998 BUCK1_SET1"); + gpio_direction_output(pdata->buck1_set1, + max8998->buck1_idx & 0x1); + + + gpio_request(pdata->buck1_set2, "MAX8998 BUCK1_SET2"); + gpio_direction_output(pdata->buck1_set2, + (max8998->buck1_idx >> 1) & 0x1); + + /* Set predefined values for BUCK1 registers */ + for (v = 0; v < ARRAY_SIZE(pdata->buck1_voltage); ++v) { + int index = MAX8998_BUCK1 - MAX8998_LDO2; + + i = 0; + while (regulators[index].min_uV + + regulators[index].uV_step * i + < pdata->buck1_voltage[v]) + i++; + + max8998->buck1_vol[v] = i; + ret = max8998_write_reg(i2c, + MAX8998_REG_BUCK1_VOLTAGE1 + v, i); + if (ret) + return ret; + } + } + + if (gpio_is_valid(pdata->buck2_set3)) { + /* Check if SET3 is not equal to 0 */ + if (!pdata->buck2_set3) { + dev_err(&pdev->dev, + "MAX8998 SET3 GPIO defined as 0 !\n"); + WARN_ON(!pdata->buck2_set3); + return -EIO; + } + gpio_request(pdata->buck2_set3, "MAX8998 BUCK2_SET3"); + gpio_direction_output(pdata->buck2_set3, + max8998->buck2_idx & 0x1); + + /* Set predefined values for BUCK2 registers */ + for (v = 0; v < ARRAY_SIZE(pdata->buck2_voltage); ++v) { + int index = MAX8998_BUCK2 - MAX8998_LDO2; + + i = 0; + while (regulators[index].min_uV + + regulators[index].uV_step * i + < pdata->buck2_voltage[v]) + i++; + + max8998->buck2_vol[v] = i; + ret = max8998_write_reg(i2c, + MAX8998_REG_BUCK2_VOLTAGE1 + v, i); + if (ret) + return ret; + } + } + + for (i = 0; i < pdata->num_regulators; i++) { + int index = pdata->regulators[i].id - MAX8998_LDO2; + + config.dev = max8998->dev; + config.of_node = pdata->regulators[i].reg_node; + config.init_data = pdata->regulators[i].initdata; + config.driver_data = max8998; + + rdev = devm_regulator_register(&pdev->dev, ®ulators[index], + &config); + if (IS_ERR(rdev)) { + ret = PTR_ERR(rdev); + dev_err(max8998->dev, "regulator %s init failed (%d)\n", + regulators[index].name, ret); + return ret; + } + } + + return 0; +} + +static const struct platform_device_id max8998_pmic_id[] = { + { "max8998-pmic", TYPE_MAX8998 }, + { "lp3974-pmic", TYPE_LP3974 }, + { } +}; +MODULE_DEVICE_TABLE(platform, max8998_pmic_id); + +static struct platform_driver max8998_pmic_driver = { + .driver = { + .name = "max8998-pmic", + }, + .probe = max8998_pmic_probe, + .id_table = max8998_pmic_id, +}; + +static int __init max8998_pmic_init(void) +{ + return platform_driver_register(&max8998_pmic_driver); +} +subsys_initcall(max8998_pmic_init); + +static void __exit max8998_pmic_cleanup(void) +{ + platform_driver_unregister(&max8998_pmic_driver); +} +module_exit(max8998_pmic_cleanup); + +MODULE_DESCRIPTION("MAXIM 8998 voltage regulator driver"); +MODULE_AUTHOR("Kyungmin Park "); +MODULE_LICENSE("GPL"); -- cgit v1.2.3