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author | 2023-02-21 18:24:12 -0800 | |
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committer | 2023-02-21 18:24:12 -0800 | |
commit | 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 (patch) | |
tree | cc5c2d0a898769fd59549594fedb3ee6f84e59a0 /drivers/iio/adc/ad7923.c | |
download | linux-5b7c4cabbb65f5c469464da6c5f614cbd7f730f2.tar.gz linux-5b7c4cabbb65f5c469464da6c5f614cbd7f730f2.zip |
Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted
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().
...
Diffstat (limited to '')
-rw-r--r-- | drivers/iio/adc/ad7923.c | 400 |
1 files changed, 400 insertions, 0 deletions
diff --git a/drivers/iio/adc/ad7923.c b/drivers/iio/adc/ad7923.c new file mode 100644 index 000000000..9d6bf6d09 --- /dev/null +++ b/drivers/iio/adc/ad7923.c @@ -0,0 +1,400 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * AD7904/AD7914/AD7923/AD7924/AD7908/AD7918/AD7928 SPI ADC driver + * + * Copyright 2011 Analog Devices Inc (from AD7923 Driver) + * Copyright 2012 CS Systemes d'Information + */ + +#include <linux/device.h> +#include <linux/kernel.h> +#include <linux/property.h> +#include <linux/slab.h> +#include <linux/sysfs.h> +#include <linux/spi/spi.h> +#include <linux/regulator/consumer.h> +#include <linux/err.h> +#include <linux/delay.h> +#include <linux/module.h> +#include <linux/interrupt.h> + +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> +#include <linux/iio/buffer.h> +#include <linux/iio/trigger_consumer.h> +#include <linux/iio/triggered_buffer.h> + +#define AD7923_WRITE_CR BIT(11) /* write control register */ +#define AD7923_RANGE BIT(1) /* range to REFin */ +#define AD7923_CODING BIT(0) /* coding is straight binary */ +#define AD7923_PM_MODE_AS (1) /* auto shutdown */ +#define AD7923_PM_MODE_FS (2) /* full shutdown */ +#define AD7923_PM_MODE_OPS (3) /* normal operation */ +#define AD7923_SEQUENCE_OFF (0) /* no sequence fonction */ +#define AD7923_SEQUENCE_PROTECT (2) /* no interrupt write cycle */ +#define AD7923_SEQUENCE_ON (3) /* continuous sequence */ + + +#define AD7923_PM_MODE_WRITE(mode) ((mode) << 4) /* write mode */ +#define AD7923_CHANNEL_WRITE(channel) ((channel) << 6) /* write channel */ +#define AD7923_SEQUENCE_WRITE(sequence) ((((sequence) & 1) << 3) \ + + (((sequence) & 2) << 9)) + /* write sequence fonction */ +/* left shift for CR : bit 11 transmit in first */ +#define AD7923_SHIFT_REGISTER 4 + +/* val = value, dec = left shift, bits = number of bits of the mask */ +#define EXTRACT(val, dec, bits) (((val) >> (dec)) & ((1 << (bits)) - 1)) + +struct ad7923_state { + struct spi_device *spi; + struct spi_transfer ring_xfer[5]; + struct spi_transfer scan_single_xfer[2]; + struct spi_message ring_msg; + struct spi_message scan_single_msg; + + struct regulator *reg; + + unsigned int settings; + + /* + * DMA (thus cache coherency maintenance) may require the + * transfer buffers to live in their own cache lines. + * Ensure rx_buf can be directly used in iio_push_to_buffers_with_timetamp + * Length = 8 channels + 4 extra for 8 byte timestamp + */ + __be16 rx_buf[12] __aligned(IIO_DMA_MINALIGN); + __be16 tx_buf[4]; +}; + +struct ad7923_chip_info { + const struct iio_chan_spec *channels; + unsigned int num_channels; +}; + +enum ad7923_id { + AD7904, + AD7914, + AD7924, + AD7908, + AD7918, + AD7928 +}; + +#define AD7923_V_CHAN(index, bits) \ + { \ + .type = IIO_VOLTAGE, \ + .indexed = 1, \ + .channel = index, \ + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ + .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \ + .address = index, \ + .scan_index = index, \ + .scan_type = { \ + .sign = 'u', \ + .realbits = (bits), \ + .storagebits = 16, \ + .shift = 12 - (bits), \ + .endianness = IIO_BE, \ + }, \ + } + +#define DECLARE_AD7923_CHANNELS(name, bits) \ +const struct iio_chan_spec name ## _channels[] = { \ + AD7923_V_CHAN(0, bits), \ + AD7923_V_CHAN(1, bits), \ + AD7923_V_CHAN(2, bits), \ + AD7923_V_CHAN(3, bits), \ + IIO_CHAN_SOFT_TIMESTAMP(4), \ +} + +#define DECLARE_AD7908_CHANNELS(name, bits) \ +const struct iio_chan_spec name ## _channels[] = { \ + AD7923_V_CHAN(0, bits), \ + AD7923_V_CHAN(1, bits), \ + AD7923_V_CHAN(2, bits), \ + AD7923_V_CHAN(3, bits), \ + AD7923_V_CHAN(4, bits), \ + AD7923_V_CHAN(5, bits), \ + AD7923_V_CHAN(6, bits), \ + AD7923_V_CHAN(7, bits), \ + IIO_CHAN_SOFT_TIMESTAMP(8), \ +} + +static DECLARE_AD7923_CHANNELS(ad7904, 8); +static DECLARE_AD7923_CHANNELS(ad7914, 10); +static DECLARE_AD7923_CHANNELS(ad7924, 12); +static DECLARE_AD7908_CHANNELS(ad7908, 8); +static DECLARE_AD7908_CHANNELS(ad7918, 10); +static DECLARE_AD7908_CHANNELS(ad7928, 12); + +static const struct ad7923_chip_info ad7923_chip_info[] = { + [AD7904] = { + .channels = ad7904_channels, + .num_channels = ARRAY_SIZE(ad7904_channels), + }, + [AD7914] = { + .channels = ad7914_channels, + .num_channels = ARRAY_SIZE(ad7914_channels), + }, + [AD7924] = { + .channels = ad7924_channels, + .num_channels = ARRAY_SIZE(ad7924_channels), + }, + [AD7908] = { + .channels = ad7908_channels, + .num_channels = ARRAY_SIZE(ad7908_channels), + }, + [AD7918] = { + .channels = ad7918_channels, + .num_channels = ARRAY_SIZE(ad7918_channels), + }, + [AD7928] = { + .channels = ad7928_channels, + .num_channels = ARRAY_SIZE(ad7928_channels), + }, +}; + +/* + * ad7923_update_scan_mode() setup the spi transfer buffer for the new scan mask + */ +static int ad7923_update_scan_mode(struct iio_dev *indio_dev, + const unsigned long *active_scan_mask) +{ + struct ad7923_state *st = iio_priv(indio_dev); + int i, cmd, len; + + len = 0; + /* + * For this driver the last channel is always the software timestamp so + * skip that one. + */ + for_each_set_bit(i, active_scan_mask, indio_dev->num_channels - 1) { + cmd = AD7923_WRITE_CR | AD7923_CHANNEL_WRITE(i) | + AD7923_SEQUENCE_WRITE(AD7923_SEQUENCE_OFF) | + st->settings; + cmd <<= AD7923_SHIFT_REGISTER; + st->tx_buf[len++] = cpu_to_be16(cmd); + } + /* build spi ring message */ + st->ring_xfer[0].tx_buf = &st->tx_buf[0]; + st->ring_xfer[0].len = len; + st->ring_xfer[0].cs_change = 1; + + spi_message_init(&st->ring_msg); + spi_message_add_tail(&st->ring_xfer[0], &st->ring_msg); + + for (i = 0; i < len; i++) { + st->ring_xfer[i + 1].rx_buf = &st->rx_buf[i]; + st->ring_xfer[i + 1].len = 2; + st->ring_xfer[i + 1].cs_change = 1; + spi_message_add_tail(&st->ring_xfer[i + 1], &st->ring_msg); + } + /* make sure last transfer cs_change is not set */ + st->ring_xfer[i + 1].cs_change = 0; + + return 0; +} + +static irqreturn_t ad7923_trigger_handler(int irq, void *p) +{ + struct iio_poll_func *pf = p; + struct iio_dev *indio_dev = pf->indio_dev; + struct ad7923_state *st = iio_priv(indio_dev); + int b_sent; + + b_sent = spi_sync(st->spi, &st->ring_msg); + if (b_sent) + goto done; + + iio_push_to_buffers_with_timestamp(indio_dev, st->rx_buf, + iio_get_time_ns(indio_dev)); + +done: + iio_trigger_notify_done(indio_dev->trig); + + return IRQ_HANDLED; +} + +static int ad7923_scan_direct(struct ad7923_state *st, unsigned int ch) +{ + int ret, cmd; + + cmd = AD7923_WRITE_CR | AD7923_CHANNEL_WRITE(ch) | + AD7923_SEQUENCE_WRITE(AD7923_SEQUENCE_OFF) | + st->settings; + cmd <<= AD7923_SHIFT_REGISTER; + st->tx_buf[0] = cpu_to_be16(cmd); + + ret = spi_sync(st->spi, &st->scan_single_msg); + if (ret) + return ret; + + return be16_to_cpu(st->rx_buf[0]); +} + +static int ad7923_get_range(struct ad7923_state *st) +{ + int vref; + + vref = regulator_get_voltage(st->reg); + if (vref < 0) + return vref; + + vref /= 1000; + + if (!(st->settings & AD7923_RANGE)) + vref *= 2; + + return vref; +} + +static int ad7923_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, + int *val2, + long m) +{ + int ret; + struct ad7923_state *st = iio_priv(indio_dev); + + switch (m) { + case IIO_CHAN_INFO_RAW: + ret = iio_device_claim_direct_mode(indio_dev); + if (ret) + return ret; + ret = ad7923_scan_direct(st, chan->address); + iio_device_release_direct_mode(indio_dev); + + if (ret < 0) + return ret; + + if (chan->address == EXTRACT(ret, 12, 4)) + *val = EXTRACT(ret, chan->scan_type.shift, + chan->scan_type.realbits); + else + return -EIO; + + return IIO_VAL_INT; + case IIO_CHAN_INFO_SCALE: + ret = ad7923_get_range(st); + if (ret < 0) + return ret; + *val = ret; + *val2 = chan->scan_type.realbits; + return IIO_VAL_FRACTIONAL_LOG2; + } + return -EINVAL; +} + +static const struct iio_info ad7923_info = { + .read_raw = &ad7923_read_raw, + .update_scan_mode = ad7923_update_scan_mode, +}; + +static void ad7923_regulator_disable(void *data) +{ + struct ad7923_state *st = data; + + regulator_disable(st->reg); +} + +static int ad7923_probe(struct spi_device *spi) +{ + u32 ad7923_range = AD7923_RANGE; + struct ad7923_state *st; + struct iio_dev *indio_dev; + const struct ad7923_chip_info *info; + int ret; + + indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st)); + if (!indio_dev) + return -ENOMEM; + + st = iio_priv(indio_dev); + + if (device_property_read_bool(&spi->dev, "adi,range-double")) + ad7923_range = 0; + + st->spi = spi; + st->settings = AD7923_CODING | ad7923_range | + AD7923_PM_MODE_WRITE(AD7923_PM_MODE_OPS); + + info = &ad7923_chip_info[spi_get_device_id(spi)->driver_data]; + + indio_dev->name = spi_get_device_id(spi)->name; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->channels = info->channels; + indio_dev->num_channels = info->num_channels; + indio_dev->info = &ad7923_info; + + /* Setup default message */ + + st->scan_single_xfer[0].tx_buf = &st->tx_buf[0]; + st->scan_single_xfer[0].len = 2; + st->scan_single_xfer[0].cs_change = 1; + st->scan_single_xfer[1].rx_buf = &st->rx_buf[0]; + st->scan_single_xfer[1].len = 2; + + spi_message_init(&st->scan_single_msg); + spi_message_add_tail(&st->scan_single_xfer[0], &st->scan_single_msg); + spi_message_add_tail(&st->scan_single_xfer[1], &st->scan_single_msg); + + st->reg = devm_regulator_get(&spi->dev, "refin"); + if (IS_ERR(st->reg)) + return PTR_ERR(st->reg); + + ret = regulator_enable(st->reg); + if (ret) + return ret; + + ret = devm_add_action_or_reset(&spi->dev, ad7923_regulator_disable, st); + if (ret) + return ret; + + ret = devm_iio_triggered_buffer_setup(&spi->dev, indio_dev, NULL, + &ad7923_trigger_handler, NULL); + if (ret) + return ret; + + return devm_iio_device_register(&spi->dev, indio_dev); +} + +static const struct spi_device_id ad7923_id[] = { + {"ad7904", AD7904}, + {"ad7914", AD7914}, + {"ad7923", AD7924}, + {"ad7924", AD7924}, + {"ad7908", AD7908}, + {"ad7918", AD7918}, + {"ad7928", AD7928}, + {} +}; +MODULE_DEVICE_TABLE(spi, ad7923_id); + +static const struct of_device_id ad7923_of_match[] = { + { .compatible = "adi,ad7904", }, + { .compatible = "adi,ad7914", }, + { .compatible = "adi,ad7923", }, + { .compatible = "adi,ad7924", }, + { .compatible = "adi,ad7908", }, + { .compatible = "adi,ad7918", }, + { .compatible = "adi,ad7928", }, + { }, +}; +MODULE_DEVICE_TABLE(of, ad7923_of_match); + +static struct spi_driver ad7923_driver = { + .driver = { + .name = "ad7923", + .of_match_table = ad7923_of_match, + }, + .probe = ad7923_probe, + .id_table = ad7923_id, +}; +module_spi_driver(ad7923_driver); + +MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>"); +MODULE_AUTHOR("Patrick Vasseur <patrick.vasseur@c-s.fr>"); +MODULE_DESCRIPTION("Analog Devices AD7923 and similar ADC"); +MODULE_LICENSE("GPL v2"); |