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/mfd/madera-core.c | 798 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 798 insertions(+) create mode 100644 drivers/mfd/madera-core.c (limited to 'drivers/mfd/madera-core.c') diff --git a/drivers/mfd/madera-core.c b/drivers/mfd/madera-core.c new file mode 100644 index 000000000..bdbd5bfc9 --- /dev/null +++ b/drivers/mfd/madera-core.c @@ -0,0 +1,798 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Core MFD support for Cirrus Logic Madera codecs + * + * Copyright (C) 2015-2018 Cirrus Logic + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#include "madera.h" + +#define CS47L15_SILICON_ID 0x6370 +#define CS47L35_SILICON_ID 0x6360 +#define CS47L85_SILICON_ID 0x6338 +#define CS47L90_SILICON_ID 0x6364 +#define CS47L92_SILICON_ID 0x6371 + +#define MADERA_32KZ_MCLK2 1 + +#define MADERA_RESET_MIN_US 2000 +#define MADERA_RESET_MAX_US 3000 + +#define ERRATA_DCVDD_MIN_US 10000 +#define ERRATA_DCVDD_MAX_US 15000 + +static const char * const madera_core_supplies[] = { + "AVDD", + "DBVDD1", +}; + +static const struct mfd_cell madera_ldo1_devs[] = { + { + .name = "madera-ldo1", + .level = MFD_DEP_LEVEL_HIGH, + }, +}; + +static const char * const cs47l15_supplies[] = { + "MICVDD", + "CPVDD1", + "SPKVDD", +}; + +static const struct mfd_cell cs47l15_devs[] = { + { .name = "madera-pinctrl", }, + { .name = "madera-irq", }, + { .name = "madera-gpio", }, + { + .name = "madera-extcon", + .parent_supplies = cs47l15_supplies, + .num_parent_supplies = 1, /* We only need MICVDD */ + }, + { + .name = "cs47l15-codec", + .parent_supplies = cs47l15_supplies, + .num_parent_supplies = ARRAY_SIZE(cs47l15_supplies), + }, +}; + +static const char * const cs47l35_supplies[] = { + "MICVDD", + "DBVDD2", + "CPVDD1", + "CPVDD2", + "SPKVDD", +}; + +static const struct mfd_cell cs47l35_devs[] = { + { .name = "madera-pinctrl", }, + { .name = "madera-irq", }, + { .name = "madera-micsupp", }, + { .name = "madera-gpio", }, + { + .name = "madera-extcon", + .parent_supplies = cs47l35_supplies, + .num_parent_supplies = 1, /* We only need MICVDD */ + }, + { + .name = "cs47l35-codec", + .parent_supplies = cs47l35_supplies, + .num_parent_supplies = ARRAY_SIZE(cs47l35_supplies), + }, +}; + +static const char * const cs47l85_supplies[] = { + "MICVDD", + "DBVDD2", + "DBVDD3", + "DBVDD4", + "CPVDD1", + "CPVDD2", + "SPKVDDL", + "SPKVDDR", +}; + +static const struct mfd_cell cs47l85_devs[] = { + { .name = "madera-pinctrl", }, + { .name = "madera-irq", }, + { .name = "madera-micsupp", }, + { .name = "madera-gpio", }, + { + .name = "madera-extcon", + .parent_supplies = cs47l85_supplies, + .num_parent_supplies = 1, /* We only need MICVDD */ + }, + { + .name = "cs47l85-codec", + .parent_supplies = cs47l85_supplies, + .num_parent_supplies = ARRAY_SIZE(cs47l85_supplies), + }, +}; + +static const char * const cs47l90_supplies[] = { + "MICVDD", + "DBVDD2", + "DBVDD3", + "DBVDD4", + "CPVDD1", + "CPVDD2", +}; + +static const struct mfd_cell cs47l90_devs[] = { + { .name = "madera-pinctrl", }, + { .name = "madera-irq", }, + { .name = "madera-micsupp", }, + { .name = "madera-gpio", }, + { + .name = "madera-extcon", + .parent_supplies = cs47l90_supplies, + .num_parent_supplies = 1, /* We only need MICVDD */ + }, + { + .name = "cs47l90-codec", + .parent_supplies = cs47l90_supplies, + .num_parent_supplies = ARRAY_SIZE(cs47l90_supplies), + }, +}; + +static const char * const cs47l92_supplies[] = { + "MICVDD", + "CPVDD1", + "CPVDD2", +}; + +static const struct mfd_cell cs47l92_devs[] = { + { .name = "madera-pinctrl", }, + { .name = "madera-irq", }, + { .name = "madera-micsupp", }, + { .name = "madera-gpio", }, + { + .name = "madera-extcon", + .parent_supplies = cs47l92_supplies, + .num_parent_supplies = 1, /* We only need MICVDD */ + }, + { + .name = "cs47l92-codec", + .parent_supplies = cs47l92_supplies, + .num_parent_supplies = ARRAY_SIZE(cs47l92_supplies), + }, +}; + +/* Used by madera-i2c and madera-spi drivers */ +const char *madera_name_from_type(enum madera_type type) +{ + switch (type) { + case CS47L15: + return "CS47L15"; + case CS47L35: + return "CS47L35"; + case CS47L85: + return "CS47L85"; + case CS47L90: + return "CS47L90"; + case CS47L91: + return "CS47L91"; + case CS42L92: + return "CS42L92"; + case CS47L92: + return "CS47L92"; + case CS47L93: + return "CS47L93"; + case WM1840: + return "WM1840"; + default: + return "Unknown"; + } +} +EXPORT_SYMBOL_GPL(madera_name_from_type); + +#define MADERA_BOOT_POLL_INTERVAL_USEC 5000 +#define MADERA_BOOT_POLL_TIMEOUT_USEC 25000 + +static int madera_wait_for_boot_noack(struct madera *madera) +{ + ktime_t timeout; + unsigned int val = 0; + int ret = 0; + + /* + * We can't use an interrupt as we need to runtime resume to do so, + * so we poll the status bit. This won't race with the interrupt + * handler because it will be blocked on runtime resume. + * The chip could NAK a read request while it is booting so ignore + * errors from regmap_read. + */ + timeout = ktime_add_us(ktime_get(), MADERA_BOOT_POLL_TIMEOUT_USEC); + regmap_read(madera->regmap, MADERA_IRQ1_RAW_STATUS_1, &val); + while (!(val & MADERA_BOOT_DONE_STS1) && + !ktime_after(ktime_get(), timeout)) { + usleep_range(MADERA_BOOT_POLL_INTERVAL_USEC / 2, + MADERA_BOOT_POLL_INTERVAL_USEC); + regmap_read(madera->regmap, MADERA_IRQ1_RAW_STATUS_1, &val); + } + + if (!(val & MADERA_BOOT_DONE_STS1)) { + dev_err(madera->dev, "Polling BOOT_DONE_STS timed out\n"); + ret = -ETIMEDOUT; + } + + return ret; +} + +static int madera_wait_for_boot(struct madera *madera) +{ + int ret = madera_wait_for_boot_noack(madera); + + /* + * BOOT_DONE defaults to unmasked on boot so we must ack it. + * Do this even after a timeout to avoid interrupt storms. + */ + regmap_write(madera->regmap, MADERA_IRQ1_STATUS_1, + MADERA_BOOT_DONE_EINT1); + + pm_runtime_mark_last_busy(madera->dev); + + return ret; +} + +static int madera_soft_reset(struct madera *madera) +{ + int ret; + + ret = regmap_write(madera->regmap, MADERA_SOFTWARE_RESET, 0); + if (ret != 0) { + dev_err(madera->dev, "Failed to soft reset device: %d\n", ret); + return ret; + } + + /* Allow time for internal clocks to startup after reset */ + usleep_range(MADERA_RESET_MIN_US, MADERA_RESET_MAX_US); + + return 0; +} + +static void madera_enable_hard_reset(struct madera *madera) +{ + /* + * There are many existing out-of-tree users of these codecs that we + * can't break so preserve the expected behaviour of setting the line + * low to assert reset. + */ + gpiod_set_raw_value_cansleep(madera->pdata.reset, 0); +} + +static void madera_disable_hard_reset(struct madera *madera) +{ + gpiod_set_raw_value_cansleep(madera->pdata.reset, 1); + + usleep_range(MADERA_RESET_MIN_US, MADERA_RESET_MAX_US); +} + +static int __maybe_unused madera_runtime_resume(struct device *dev) +{ + struct madera *madera = dev_get_drvdata(dev); + int ret; + + dev_dbg(dev, "Leaving sleep mode\n"); + + if (!madera->reset_errata) + madera_enable_hard_reset(madera); + + ret = regulator_enable(madera->dcvdd); + if (ret) { + dev_err(dev, "Failed to enable DCVDD: %d\n", ret); + return ret; + } + + regcache_cache_only(madera->regmap, false); + regcache_cache_only(madera->regmap_32bit, false); + + if (madera->reset_errata) + usleep_range(ERRATA_DCVDD_MIN_US, ERRATA_DCVDD_MAX_US); + else + madera_disable_hard_reset(madera); + + if (!madera->pdata.reset || madera->reset_errata) { + ret = madera_wait_for_boot(madera); + if (ret) + goto err; + + ret = madera_soft_reset(madera); + if (ret) { + dev_err(dev, "Failed to reset: %d\n", ret); + goto err; + } + } + + ret = madera_wait_for_boot(madera); + if (ret) + goto err; + + ret = regcache_sync(madera->regmap); + if (ret) { + dev_err(dev, "Failed to restore 16-bit register cache\n"); + goto err; + } + + ret = regcache_sync(madera->regmap_32bit); + if (ret) { + dev_err(dev, "Failed to restore 32-bit register cache\n"); + goto err; + } + + return 0; + +err: + regcache_cache_only(madera->regmap_32bit, true); + regcache_cache_only(madera->regmap, true); + regulator_disable(madera->dcvdd); + + return ret; +} + +static int __maybe_unused madera_runtime_suspend(struct device *dev) +{ + struct madera *madera = dev_get_drvdata(dev); + + dev_dbg(madera->dev, "Entering sleep mode\n"); + + regcache_cache_only(madera->regmap, true); + regcache_mark_dirty(madera->regmap); + regcache_cache_only(madera->regmap_32bit, true); + regcache_mark_dirty(madera->regmap_32bit); + + regulator_disable(madera->dcvdd); + + return 0; +} + +const struct dev_pm_ops madera_pm_ops = { + SET_RUNTIME_PM_OPS(madera_runtime_suspend, + madera_runtime_resume, + NULL) +}; +EXPORT_SYMBOL_GPL(madera_pm_ops); + +const struct of_device_id madera_of_match[] = { + { .compatible = "cirrus,cs47l15", .data = (void *)CS47L15 }, + { .compatible = "cirrus,cs47l35", .data = (void *)CS47L35 }, + { .compatible = "cirrus,cs47l85", .data = (void *)CS47L85 }, + { .compatible = "cirrus,cs47l90", .data = (void *)CS47L90 }, + { .compatible = "cirrus,cs47l91", .data = (void *)CS47L91 }, + { .compatible = "cirrus,cs42l92", .data = (void *)CS42L92 }, + { .compatible = "cirrus,cs47l92", .data = (void *)CS47L92 }, + { .compatible = "cirrus,cs47l93", .data = (void *)CS47L93 }, + { .compatible = "cirrus,wm1840", .data = (void *)WM1840 }, + {} +}; +MODULE_DEVICE_TABLE(of, madera_of_match); +EXPORT_SYMBOL_GPL(madera_of_match); + +static int madera_get_reset_gpio(struct madera *madera) +{ + struct gpio_desc *reset; + + if (madera->pdata.reset) + return 0; + + reset = devm_gpiod_get_optional(madera->dev, "reset", GPIOD_OUT_LOW); + if (IS_ERR(reset)) + return dev_err_probe(madera->dev, PTR_ERR(reset), + "Failed to request /RESET"); + + /* + * A hard reset is needed for full reset of the chip. We allow running + * without hard reset only because it can be useful for early + * prototyping and some debugging, but we need to warn it's not ideal. + */ + if (!reset) + dev_warn(madera->dev, + "Running without reset GPIO is not recommended\n"); + + madera->pdata.reset = reset; + + return 0; +} + +static void madera_set_micbias_info(struct madera *madera) +{ + /* + * num_childbias is an array because future codecs can have different + * childbiases for each micbias. Unspecified values default to 0. + */ + switch (madera->type) { + case CS47L15: + madera->num_micbias = 1; + madera->num_childbias[0] = 3; + return; + case CS47L35: + madera->num_micbias = 2; + madera->num_childbias[0] = 2; + madera->num_childbias[1] = 2; + return; + case CS47L85: + case WM1840: + madera->num_micbias = 4; + /* no child biases */ + return; + case CS47L90: + case CS47L91: + madera->num_micbias = 2; + madera->num_childbias[0] = 4; + madera->num_childbias[1] = 4; + return; + case CS42L92: + case CS47L92: + case CS47L93: + madera->num_micbias = 2; + madera->num_childbias[0] = 4; + madera->num_childbias[1] = 2; + return; + default: + return; + } +} + +int madera_dev_init(struct madera *madera) +{ + struct device *dev = madera->dev; + unsigned int hwid; + int (*patch_fn)(struct madera *) = NULL; + const struct mfd_cell *mfd_devs; + int n_devs = 0; + int i, ret; + + dev_set_drvdata(madera->dev, madera); + BLOCKING_INIT_NOTIFIER_HEAD(&madera->notifier); + mutex_init(&madera->dapm_ptr_lock); + + madera_set_micbias_info(madera); + + /* + * We need writable hw config info that all children can share. + * Simplest to take one shared copy of pdata struct. + */ + if (dev_get_platdata(madera->dev)) { + memcpy(&madera->pdata, dev_get_platdata(madera->dev), + sizeof(madera->pdata)); + } + + madera->mclk[MADERA_MCLK1].id = "mclk1"; + madera->mclk[MADERA_MCLK2].id = "mclk2"; + madera->mclk[MADERA_MCLK3].id = "mclk3"; + + ret = devm_clk_bulk_get_optional(madera->dev, ARRAY_SIZE(madera->mclk), + madera->mclk); + if (ret) { + dev_err(madera->dev, "Failed to get clocks: %d\n", ret); + return ret; + } + + /* Not using devm_clk_get to prevent breakage of existing DTs */ + if (!madera->mclk[MADERA_MCLK2].clk) + dev_warn(madera->dev, "Missing MCLK2, requires 32kHz clock\n"); + + ret = madera_get_reset_gpio(madera); + if (ret) + return ret; + + regcache_cache_only(madera->regmap, true); + regcache_cache_only(madera->regmap_32bit, true); + + for (i = 0; i < ARRAY_SIZE(madera_core_supplies); i++) + madera->core_supplies[i].supply = madera_core_supplies[i]; + + madera->num_core_supplies = ARRAY_SIZE(madera_core_supplies); + + /* + * On some codecs DCVDD could be supplied by the internal LDO1. + * For those we must add the LDO1 driver before requesting DCVDD + * No devm_ because we need to control shutdown order of children. + */ + switch (madera->type) { + case CS47L15: + madera->reset_errata = true; + break; + case CS47L35: + case CS47L90: + case CS47L91: + case CS42L92: + case CS47L92: + case CS47L93: + break; + case CS47L85: + case WM1840: + ret = mfd_add_devices(madera->dev, PLATFORM_DEVID_NONE, + madera_ldo1_devs, + ARRAY_SIZE(madera_ldo1_devs), + NULL, 0, NULL); + if (ret) { + dev_err(dev, "Failed to add LDO1 child: %d\n", ret); + return ret; + } + break; + default: + /* No point continuing if the type is unknown */ + dev_err(madera->dev, "Unknown device type %d\n", madera->type); + return -ENODEV; + } + + ret = devm_regulator_bulk_get(dev, madera->num_core_supplies, + madera->core_supplies); + if (ret) { + dev_err(dev, "Failed to request core supplies: %d\n", ret); + goto err_devs; + } + + /* + * Don't use devres here. If the regulator is one of our children it + * will already have been removed before devres cleanup on this mfd + * driver tries to call put() on it. We need control of shutdown order. + */ + madera->dcvdd = regulator_get(madera->dev, "DCVDD"); + if (IS_ERR(madera->dcvdd)) { + ret = PTR_ERR(madera->dcvdd); + dev_err(dev, "Failed to request DCVDD: %d\n", ret); + goto err_devs; + } + + ret = regulator_bulk_enable(madera->num_core_supplies, + madera->core_supplies); + if (ret) { + dev_err(dev, "Failed to enable core supplies: %d\n", ret); + goto err_dcvdd; + } + + if (madera->reset_errata) + madera_disable_hard_reset(madera); + + ret = regulator_enable(madera->dcvdd); + if (ret) { + dev_err(dev, "Failed to enable DCVDD: %d\n", ret); + goto err_enable; + } + + if (madera->reset_errata) + usleep_range(ERRATA_DCVDD_MIN_US, ERRATA_DCVDD_MAX_US); + else + madera_disable_hard_reset(madera); + + regcache_cache_only(madera->regmap, false); + regcache_cache_only(madera->regmap_32bit, false); + + ret = madera_wait_for_boot_noack(madera); + if (ret) { + dev_err(madera->dev, "Device failed initial boot: %d\n", ret); + goto err_reset; + } + + /* + * Now we can power up and verify that this is a chip we know about + * before we start doing any writes to its registers. + */ + ret = regmap_read(madera->regmap, MADERA_SOFTWARE_RESET, &hwid); + if (ret) { + dev_err(dev, "Failed to read ID register: %d\n", ret); + goto err_reset; + } + + switch (hwid) { + case CS47L15_SILICON_ID: + if (IS_ENABLED(CONFIG_MFD_CS47L15)) { + switch (madera->type) { + case CS47L15: + patch_fn = &cs47l15_patch; + mfd_devs = cs47l15_devs; + n_devs = ARRAY_SIZE(cs47l15_devs); + break; + default: + break; + } + } + break; + case CS47L35_SILICON_ID: + if (IS_ENABLED(CONFIG_MFD_CS47L35)) { + switch (madera->type) { + case CS47L35: + patch_fn = cs47l35_patch; + mfd_devs = cs47l35_devs; + n_devs = ARRAY_SIZE(cs47l35_devs); + break; + default: + break; + } + } + break; + case CS47L85_SILICON_ID: + if (IS_ENABLED(CONFIG_MFD_CS47L85)) { + switch (madera->type) { + case CS47L85: + case WM1840: + patch_fn = cs47l85_patch; + mfd_devs = cs47l85_devs; + n_devs = ARRAY_SIZE(cs47l85_devs); + break; + default: + break; + } + } + break; + case CS47L90_SILICON_ID: + if (IS_ENABLED(CONFIG_MFD_CS47L90)) { + switch (madera->type) { + case CS47L90: + case CS47L91: + patch_fn = cs47l90_patch; + mfd_devs = cs47l90_devs; + n_devs = ARRAY_SIZE(cs47l90_devs); + break; + default: + break; + } + } + break; + case CS47L92_SILICON_ID: + if (IS_ENABLED(CONFIG_MFD_CS47L92)) { + switch (madera->type) { + case CS42L92: + case CS47L92: + case CS47L93: + patch_fn = cs47l92_patch; + mfd_devs = cs47l92_devs; + n_devs = ARRAY_SIZE(cs47l92_devs); + break; + default: + break; + } + } + break; + default: + dev_err(madera->dev, "Unknown device ID: %x\n", hwid); + ret = -EINVAL; + goto err_reset; + } + + if (!n_devs) { + dev_err(madera->dev, "Device ID 0x%x not a %s\n", hwid, + madera->type_name); + ret = -ENODEV; + goto err_reset; + } + + /* + * It looks like a device we support. If we don't have a hard reset + * we can now attempt a soft reset. + */ + if (!madera->pdata.reset || madera->reset_errata) { + ret = madera_soft_reset(madera); + if (ret) + goto err_reset; + } + + ret = madera_wait_for_boot(madera); + if (ret) { + dev_err(madera->dev, "Failed to clear boot done: %d\n", ret); + goto err_reset; + } + + ret = regmap_read(madera->regmap, MADERA_HARDWARE_REVISION, + &madera->rev); + if (ret) { + dev_err(dev, "Failed to read revision register: %d\n", ret); + goto err_reset; + } + madera->rev &= MADERA_HW_REVISION_MASK; + + dev_info(dev, "%s silicon revision %d\n", madera->type_name, + madera->rev); + + /* Apply hardware patch */ + if (patch_fn) { + ret = patch_fn(madera); + if (ret) { + dev_err(madera->dev, "Failed to apply patch %d\n", ret); + goto err_reset; + } + } + + /* Init 32k clock sourced from MCLK2 */ + ret = clk_prepare_enable(madera->mclk[MADERA_MCLK2].clk); + if (ret) { + dev_err(madera->dev, "Failed to enable 32k clock: %d\n", ret); + goto err_reset; + } + + ret = regmap_update_bits(madera->regmap, + MADERA_CLOCK_32K_1, + MADERA_CLK_32K_ENA_MASK | MADERA_CLK_32K_SRC_MASK, + MADERA_CLK_32K_ENA | MADERA_32KZ_MCLK2); + if (ret) { + dev_err(madera->dev, "Failed to init 32k clock: %d\n", ret); + goto err_clock; + } + + pm_runtime_set_active(madera->dev); + pm_runtime_enable(madera->dev); + pm_runtime_set_autosuspend_delay(madera->dev, 100); + pm_runtime_use_autosuspend(madera->dev); + + /* No devm_ because we need to control shutdown order of children */ + ret = mfd_add_devices(madera->dev, PLATFORM_DEVID_NONE, + mfd_devs, n_devs, + NULL, 0, NULL); + if (ret) { + dev_err(madera->dev, "Failed to add subdevices: %d\n", ret); + goto err_pm_runtime; + } + + return 0; + +err_pm_runtime: + pm_runtime_disable(madera->dev); +err_clock: + clk_disable_unprepare(madera->mclk[MADERA_MCLK2].clk); +err_reset: + madera_enable_hard_reset(madera); + regulator_disable(madera->dcvdd); +err_enable: + regulator_bulk_disable(madera->num_core_supplies, + madera->core_supplies); +err_dcvdd: + regulator_put(madera->dcvdd); +err_devs: + mfd_remove_devices(dev); + + return ret; +} +EXPORT_SYMBOL_GPL(madera_dev_init); + +int madera_dev_exit(struct madera *madera) +{ + /* Prevent any IRQs being serviced while we clean up */ + disable_irq(madera->irq); + + pm_runtime_get_sync(madera->dev); + + mfd_remove_devices(madera->dev); + + pm_runtime_disable(madera->dev); + + regulator_disable(madera->dcvdd); + regulator_put(madera->dcvdd); + + mfd_remove_devices_late(madera->dev); + + pm_runtime_set_suspended(madera->dev); + pm_runtime_put_noidle(madera->dev); + + clk_disable_unprepare(madera->mclk[MADERA_MCLK2].clk); + + madera_enable_hard_reset(madera); + + regulator_bulk_disable(madera->num_core_supplies, + madera->core_supplies); + return 0; +} +EXPORT_SYMBOL_GPL(madera_dev_exit); + +MODULE_DESCRIPTION("Madera core MFD driver"); +MODULE_AUTHOR("Richard Fitzgerald "); +MODULE_LICENSE("GPL v2"); -- cgit v1.2.3