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/misc/eeprom/eeprom_93xx46.c | 583 ++++++++++++++++++++++++++++++++++++ 1 file changed, 583 insertions(+) create mode 100644 drivers/misc/eeprom/eeprom_93xx46.c (limited to 'drivers/misc/eeprom/eeprom_93xx46.c') diff --git a/drivers/misc/eeprom/eeprom_93xx46.c b/drivers/misc/eeprom/eeprom_93xx46.c new file mode 100644 index 000000000..b630625b3 --- /dev/null +++ b/drivers/misc/eeprom/eeprom_93xx46.c @@ -0,0 +1,583 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Driver for 93xx46 EEPROMs + * + * (C) 2011 DENX Software Engineering, Anatolij Gustschin + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define OP_START 0x4 +#define OP_WRITE (OP_START | 0x1) +#define OP_READ (OP_START | 0x2) +#define ADDR_EWDS 0x00 +#define ADDR_ERAL 0x20 +#define ADDR_EWEN 0x30 + +struct eeprom_93xx46_devtype_data { + unsigned int quirks; + unsigned char flags; +}; + +static const struct eeprom_93xx46_devtype_data at93c46_data = { + .flags = EE_SIZE1K, +}; + +static const struct eeprom_93xx46_devtype_data at93c56_data = { + .flags = EE_SIZE2K, +}; + +static const struct eeprom_93xx46_devtype_data at93c66_data = { + .flags = EE_SIZE4K, +}; + +static const struct eeprom_93xx46_devtype_data atmel_at93c46d_data = { + .flags = EE_SIZE1K, + .quirks = EEPROM_93XX46_QUIRK_SINGLE_WORD_READ | + EEPROM_93XX46_QUIRK_INSTRUCTION_LENGTH, +}; + +static const struct eeprom_93xx46_devtype_data microchip_93lc46b_data = { + .flags = EE_SIZE1K, + .quirks = EEPROM_93XX46_QUIRK_EXTRA_READ_CYCLE, +}; + +struct eeprom_93xx46_dev { + struct spi_device *spi; + struct eeprom_93xx46_platform_data *pdata; + struct mutex lock; + struct nvmem_config nvmem_config; + struct nvmem_device *nvmem; + int addrlen; + int size; +}; + +static inline bool has_quirk_single_word_read(struct eeprom_93xx46_dev *edev) +{ + return edev->pdata->quirks & EEPROM_93XX46_QUIRK_SINGLE_WORD_READ; +} + +static inline bool has_quirk_instruction_length(struct eeprom_93xx46_dev *edev) +{ + return edev->pdata->quirks & EEPROM_93XX46_QUIRK_INSTRUCTION_LENGTH; +} + +static inline bool has_quirk_extra_read_cycle(struct eeprom_93xx46_dev *edev) +{ + return edev->pdata->quirks & EEPROM_93XX46_QUIRK_EXTRA_READ_CYCLE; +} + +static int eeprom_93xx46_read(void *priv, unsigned int off, + void *val, size_t count) +{ + struct eeprom_93xx46_dev *edev = priv; + char *buf = val; + int err = 0; + int bits; + + if (unlikely(off >= edev->size)) + return 0; + if ((off + count) > edev->size) + count = edev->size - off; + if (unlikely(!count)) + return count; + + mutex_lock(&edev->lock); + + if (edev->pdata->prepare) + edev->pdata->prepare(edev); + + /* The opcode in front of the address is three bits. */ + bits = edev->addrlen + 3; + + while (count) { + struct spi_message m; + struct spi_transfer t[2] = { { 0 } }; + u16 cmd_addr = OP_READ << edev->addrlen; + size_t nbytes = count; + + if (edev->pdata->flags & EE_ADDR8) { + cmd_addr |= off; + if (has_quirk_single_word_read(edev)) + nbytes = 1; + } else { + cmd_addr |= (off >> 1); + if (has_quirk_single_word_read(edev)) + nbytes = 2; + } + + dev_dbg(&edev->spi->dev, "read cmd 0x%x, %d Hz\n", + cmd_addr, edev->spi->max_speed_hz); + + if (has_quirk_extra_read_cycle(edev)) { + cmd_addr <<= 1; + bits += 1; + } + + spi_message_init(&m); + + t[0].tx_buf = (char *)&cmd_addr; + t[0].len = 2; + t[0].bits_per_word = bits; + spi_message_add_tail(&t[0], &m); + + t[1].rx_buf = buf; + t[1].len = count; + t[1].bits_per_word = 8; + spi_message_add_tail(&t[1], &m); + + err = spi_sync(edev->spi, &m); + /* have to wait at least Tcsl ns */ + ndelay(250); + + if (err) { + dev_err(&edev->spi->dev, "read %zu bytes at %d: err. %d\n", + nbytes, (int)off, err); + break; + } + + buf += nbytes; + off += nbytes; + count -= nbytes; + } + + if (edev->pdata->finish) + edev->pdata->finish(edev); + + mutex_unlock(&edev->lock); + + return err; +} + +static int eeprom_93xx46_ew(struct eeprom_93xx46_dev *edev, int is_on) +{ + struct spi_message m; + struct spi_transfer t; + int bits, ret; + u16 cmd_addr; + + /* The opcode in front of the address is three bits. */ + bits = edev->addrlen + 3; + + cmd_addr = OP_START << edev->addrlen; + if (edev->pdata->flags & EE_ADDR8) + cmd_addr |= (is_on ? ADDR_EWEN : ADDR_EWDS) << 1; + else + cmd_addr |= (is_on ? ADDR_EWEN : ADDR_EWDS); + + if (has_quirk_instruction_length(edev)) { + cmd_addr <<= 2; + bits += 2; + } + + dev_dbg(&edev->spi->dev, "ew%s cmd 0x%04x, %d bits\n", + is_on ? "en" : "ds", cmd_addr, bits); + + spi_message_init(&m); + memset(&t, 0, sizeof(t)); + + t.tx_buf = &cmd_addr; + t.len = 2; + t.bits_per_word = bits; + spi_message_add_tail(&t, &m); + + mutex_lock(&edev->lock); + + if (edev->pdata->prepare) + edev->pdata->prepare(edev); + + ret = spi_sync(edev->spi, &m); + /* have to wait at least Tcsl ns */ + ndelay(250); + if (ret) + dev_err(&edev->spi->dev, "erase/write %sable error %d\n", + is_on ? "en" : "dis", ret); + + if (edev->pdata->finish) + edev->pdata->finish(edev); + + mutex_unlock(&edev->lock); + return ret; +} + +static ssize_t +eeprom_93xx46_write_word(struct eeprom_93xx46_dev *edev, + const char *buf, unsigned off) +{ + struct spi_message m; + struct spi_transfer t[2]; + int bits, data_len, ret; + u16 cmd_addr; + + if (unlikely(off >= edev->size)) + return -EINVAL; + + /* The opcode in front of the address is three bits. */ + bits = edev->addrlen + 3; + + cmd_addr = OP_WRITE << edev->addrlen; + + if (edev->pdata->flags & EE_ADDR8) { + cmd_addr |= off; + data_len = 1; + } else { + cmd_addr |= (off >> 1); + data_len = 2; + } + + dev_dbg(&edev->spi->dev, "write cmd 0x%x\n", cmd_addr); + + spi_message_init(&m); + memset(t, 0, sizeof(t)); + + t[0].tx_buf = (char *)&cmd_addr; + t[0].len = 2; + t[0].bits_per_word = bits; + spi_message_add_tail(&t[0], &m); + + t[1].tx_buf = buf; + t[1].len = data_len; + t[1].bits_per_word = 8; + spi_message_add_tail(&t[1], &m); + + ret = spi_sync(edev->spi, &m); + /* have to wait program cycle time Twc ms */ + mdelay(6); + return ret; +} + +static int eeprom_93xx46_write(void *priv, unsigned int off, + void *val, size_t count) +{ + struct eeprom_93xx46_dev *edev = priv; + char *buf = val; + int i, ret, step = 1; + + if (unlikely(off >= edev->size)) + return -EFBIG; + if ((off + count) > edev->size) + count = edev->size - off; + if (unlikely(!count)) + return count; + + /* only write even number of bytes on 16-bit devices */ + if (edev->pdata->flags & EE_ADDR16) { + step = 2; + count &= ~1; + } + + /* erase/write enable */ + ret = eeprom_93xx46_ew(edev, 1); + if (ret) + return ret; + + mutex_lock(&edev->lock); + + if (edev->pdata->prepare) + edev->pdata->prepare(edev); + + for (i = 0; i < count; i += step) { + ret = eeprom_93xx46_write_word(edev, &buf[i], off + i); + if (ret) { + dev_err(&edev->spi->dev, "write failed at %d: %d\n", + (int)off + i, ret); + break; + } + } + + if (edev->pdata->finish) + edev->pdata->finish(edev); + + mutex_unlock(&edev->lock); + + /* erase/write disable */ + eeprom_93xx46_ew(edev, 0); + return ret; +} + +static int eeprom_93xx46_eral(struct eeprom_93xx46_dev *edev) +{ + struct eeprom_93xx46_platform_data *pd = edev->pdata; + struct spi_message m; + struct spi_transfer t; + int bits, ret; + u16 cmd_addr; + + /* The opcode in front of the address is three bits. */ + bits = edev->addrlen + 3; + + cmd_addr = OP_START << edev->addrlen; + if (edev->pdata->flags & EE_ADDR8) + cmd_addr |= ADDR_ERAL << 1; + else + cmd_addr |= ADDR_ERAL; + + if (has_quirk_instruction_length(edev)) { + cmd_addr <<= 2; + bits += 2; + } + + dev_dbg(&edev->spi->dev, "eral cmd 0x%04x, %d bits\n", cmd_addr, bits); + + spi_message_init(&m); + memset(&t, 0, sizeof(t)); + + t.tx_buf = &cmd_addr; + t.len = 2; + t.bits_per_word = bits; + spi_message_add_tail(&t, &m); + + mutex_lock(&edev->lock); + + if (edev->pdata->prepare) + edev->pdata->prepare(edev); + + ret = spi_sync(edev->spi, &m); + if (ret) + dev_err(&edev->spi->dev, "erase error %d\n", ret); + /* have to wait erase cycle time Tec ms */ + mdelay(6); + + if (pd->finish) + pd->finish(edev); + + mutex_unlock(&edev->lock); + return ret; +} + +static ssize_t eeprom_93xx46_store_erase(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct eeprom_93xx46_dev *edev = dev_get_drvdata(dev); + int erase = 0, ret; + + sscanf(buf, "%d", &erase); + if (erase) { + ret = eeprom_93xx46_ew(edev, 1); + if (ret) + return ret; + ret = eeprom_93xx46_eral(edev); + if (ret) + return ret; + ret = eeprom_93xx46_ew(edev, 0); + if (ret) + return ret; + } + return count; +} +static DEVICE_ATTR(erase, S_IWUSR, NULL, eeprom_93xx46_store_erase); + +static void select_assert(void *context) +{ + struct eeprom_93xx46_dev *edev = context; + + gpiod_set_value_cansleep(edev->pdata->select, 1); +} + +static void select_deassert(void *context) +{ + struct eeprom_93xx46_dev *edev = context; + + gpiod_set_value_cansleep(edev->pdata->select, 0); +} + +static const struct of_device_id eeprom_93xx46_of_table[] = { + { .compatible = "eeprom-93xx46", .data = &at93c46_data, }, + { .compatible = "atmel,at93c46", .data = &at93c46_data, }, + { .compatible = "atmel,at93c46d", .data = &atmel_at93c46d_data, }, + { .compatible = "atmel,at93c56", .data = &at93c56_data, }, + { .compatible = "atmel,at93c66", .data = &at93c66_data, }, + { .compatible = "microchip,93lc46b", .data = µchip_93lc46b_data, }, + {} +}; +MODULE_DEVICE_TABLE(of, eeprom_93xx46_of_table); + +static const struct spi_device_id eeprom_93xx46_spi_ids[] = { + { .name = "eeprom-93xx46", + .driver_data = (kernel_ulong_t)&at93c46_data, }, + { .name = "at93c46", + .driver_data = (kernel_ulong_t)&at93c46_data, }, + { .name = "at93c46d", + .driver_data = (kernel_ulong_t)&atmel_at93c46d_data, }, + { .name = "at93c56", + .driver_data = (kernel_ulong_t)&at93c56_data, }, + { .name = "at93c66", + .driver_data = (kernel_ulong_t)&at93c66_data, }, + { .name = "93lc46b", + .driver_data = (kernel_ulong_t)µchip_93lc46b_data, }, + {} +}; +MODULE_DEVICE_TABLE(spi, eeprom_93xx46_spi_ids); + +static int eeprom_93xx46_probe_dt(struct spi_device *spi) +{ + const struct of_device_id *of_id = + of_match_device(eeprom_93xx46_of_table, &spi->dev); + struct device_node *np = spi->dev.of_node; + struct eeprom_93xx46_platform_data *pd; + u32 tmp; + int ret; + + pd = devm_kzalloc(&spi->dev, sizeof(*pd), GFP_KERNEL); + if (!pd) + return -ENOMEM; + + ret = of_property_read_u32(np, "data-size", &tmp); + if (ret < 0) { + dev_err(&spi->dev, "data-size property not found\n"); + return ret; + } + + if (tmp == 8) { + pd->flags |= EE_ADDR8; + } else if (tmp == 16) { + pd->flags |= EE_ADDR16; + } else { + dev_err(&spi->dev, "invalid data-size (%d)\n", tmp); + return -EINVAL; + } + + if (of_property_read_bool(np, "read-only")) + pd->flags |= EE_READONLY; + + pd->select = devm_gpiod_get_optional(&spi->dev, "select", + GPIOD_OUT_LOW); + if (IS_ERR(pd->select)) + return PTR_ERR(pd->select); + + pd->prepare = select_assert; + pd->finish = select_deassert; + gpiod_direction_output(pd->select, 0); + + if (of_id->data) { + const struct eeprom_93xx46_devtype_data *data = of_id->data; + + pd->quirks = data->quirks; + pd->flags |= data->flags; + } + + spi->dev.platform_data = pd; + + return 0; +} + +static int eeprom_93xx46_probe(struct spi_device *spi) +{ + struct eeprom_93xx46_platform_data *pd; + struct eeprom_93xx46_dev *edev; + int err; + + if (spi->dev.of_node) { + err = eeprom_93xx46_probe_dt(spi); + if (err < 0) + return err; + } + + pd = spi->dev.platform_data; + if (!pd) { + dev_err(&spi->dev, "missing platform data\n"); + return -ENODEV; + } + + edev = devm_kzalloc(&spi->dev, sizeof(*edev), GFP_KERNEL); + if (!edev) + return -ENOMEM; + + if (pd->flags & EE_SIZE1K) + edev->size = 128; + else if (pd->flags & EE_SIZE2K) + edev->size = 256; + else if (pd->flags & EE_SIZE4K) + edev->size = 512; + else { + dev_err(&spi->dev, "unspecified size\n"); + return -EINVAL; + } + + if (pd->flags & EE_ADDR8) + edev->addrlen = ilog2(edev->size); + else if (pd->flags & EE_ADDR16) + edev->addrlen = ilog2(edev->size) - 1; + else { + dev_err(&spi->dev, "unspecified address type\n"); + return -EINVAL; + } + + mutex_init(&edev->lock); + + edev->spi = spi; + edev->pdata = pd; + + edev->nvmem_config.type = NVMEM_TYPE_EEPROM; + edev->nvmem_config.name = dev_name(&spi->dev); + edev->nvmem_config.dev = &spi->dev; + edev->nvmem_config.read_only = pd->flags & EE_READONLY; + edev->nvmem_config.root_only = true; + edev->nvmem_config.owner = THIS_MODULE; + edev->nvmem_config.compat = true; + edev->nvmem_config.base_dev = &spi->dev; + edev->nvmem_config.reg_read = eeprom_93xx46_read; + edev->nvmem_config.reg_write = eeprom_93xx46_write; + edev->nvmem_config.priv = edev; + edev->nvmem_config.stride = 4; + edev->nvmem_config.word_size = 1; + edev->nvmem_config.size = edev->size; + + edev->nvmem = devm_nvmem_register(&spi->dev, &edev->nvmem_config); + if (IS_ERR(edev->nvmem)) + return PTR_ERR(edev->nvmem); + + dev_info(&spi->dev, "%d-bit eeprom containing %d bytes %s\n", + (pd->flags & EE_ADDR8) ? 8 : 16, + edev->size, + (pd->flags & EE_READONLY) ? "(readonly)" : ""); + + if (!(pd->flags & EE_READONLY)) { + if (device_create_file(&spi->dev, &dev_attr_erase)) + dev_err(&spi->dev, "can't create erase interface\n"); + } + + spi_set_drvdata(spi, edev); + return 0; +} + +static void eeprom_93xx46_remove(struct spi_device *spi) +{ + struct eeprom_93xx46_dev *edev = spi_get_drvdata(spi); + + if (!(edev->pdata->flags & EE_READONLY)) + device_remove_file(&spi->dev, &dev_attr_erase); +} + +static struct spi_driver eeprom_93xx46_driver = { + .driver = { + .name = "93xx46", + .of_match_table = of_match_ptr(eeprom_93xx46_of_table), + }, + .probe = eeprom_93xx46_probe, + .remove = eeprom_93xx46_remove, + .id_table = eeprom_93xx46_spi_ids, +}; + +module_spi_driver(eeprom_93xx46_driver); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Driver for 93xx46 EEPROMs"); +MODULE_AUTHOR("Anatolij Gustschin "); +MODULE_ALIAS("spi:93xx46"); +MODULE_ALIAS("spi:eeprom-93xx46"); +MODULE_ALIAS("spi:93lc46b"); -- cgit v1.2.3