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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/clk/clk-max9485.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/clk/clk-max9485.c | 386 |
1 files changed, 386 insertions, 0 deletions
diff --git a/drivers/clk/clk-max9485.c b/drivers/clk/clk-max9485.c new file mode 100644 index 000000000..5f85b0a32 --- /dev/null +++ b/drivers/clk/clk-max9485.c @@ -0,0 +1,386 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/clk.h> +#include <linux/clk-provider.h> +#include <linux/err.h> +#include <linux/errno.h> +#include <linux/gpio/consumer.h> +#include <linux/i2c.h> +#include <linux/regulator/consumer.h> + +#include <dt-bindings/clock/maxim,max9485.h> + +#define MAX9485_NUM_CLKS 4 + +/* This chip has only one register of 8 bit width. */ + +#define MAX9485_FS_12KHZ (0 << 0) +#define MAX9485_FS_32KHZ (1 << 0) +#define MAX9485_FS_44_1KHZ (2 << 0) +#define MAX9485_FS_48KHZ (3 << 0) + +#define MAX9485_SCALE_256 (0 << 2) +#define MAX9485_SCALE_384 (1 << 2) +#define MAX9485_SCALE_768 (2 << 2) + +#define MAX9485_DOUBLE BIT(4) +#define MAX9485_CLKOUT1_ENABLE BIT(5) +#define MAX9485_CLKOUT2_ENABLE BIT(6) +#define MAX9485_MCLK_ENABLE BIT(7) +#define MAX9485_FREQ_MASK 0x1f + +struct max9485_rate { + unsigned long out; + u8 reg_value; +}; + +/* + * Ordered by frequency. For frequency the hardware can generate with + * multiple settings, the one with lowest jitter is listed first. + */ +static const struct max9485_rate max9485_rates[] = { + { 3072000, MAX9485_FS_12KHZ | MAX9485_SCALE_256 }, + { 4608000, MAX9485_FS_12KHZ | MAX9485_SCALE_384 }, + { 8192000, MAX9485_FS_32KHZ | MAX9485_SCALE_256 }, + { 9126000, MAX9485_FS_12KHZ | MAX9485_SCALE_768 }, + { 11289600, MAX9485_FS_44_1KHZ | MAX9485_SCALE_256 }, + { 12288000, MAX9485_FS_48KHZ | MAX9485_SCALE_256 }, + { 12288000, MAX9485_FS_32KHZ | MAX9485_SCALE_384 }, + { 16384000, MAX9485_FS_32KHZ | MAX9485_SCALE_256 | MAX9485_DOUBLE }, + { 16934400, MAX9485_FS_44_1KHZ | MAX9485_SCALE_384 }, + { 18384000, MAX9485_FS_48KHZ | MAX9485_SCALE_384 }, + { 22579200, MAX9485_FS_44_1KHZ | MAX9485_SCALE_256 | MAX9485_DOUBLE }, + { 24576000, MAX9485_FS_48KHZ | MAX9485_SCALE_256 | MAX9485_DOUBLE }, + { 24576000, MAX9485_FS_32KHZ | MAX9485_SCALE_384 | MAX9485_DOUBLE }, + { 24576000, MAX9485_FS_32KHZ | MAX9485_SCALE_768 }, + { 33868800, MAX9485_FS_44_1KHZ | MAX9485_SCALE_384 | MAX9485_DOUBLE }, + { 33868800, MAX9485_FS_44_1KHZ | MAX9485_SCALE_768 }, + { 36864000, MAX9485_FS_48KHZ | MAX9485_SCALE_384 | MAX9485_DOUBLE }, + { 36864000, MAX9485_FS_48KHZ | MAX9485_SCALE_768 }, + { 49152000, MAX9485_FS_32KHZ | MAX9485_SCALE_768 | MAX9485_DOUBLE }, + { 67737600, MAX9485_FS_44_1KHZ | MAX9485_SCALE_768 | MAX9485_DOUBLE }, + { 73728000, MAX9485_FS_48KHZ | MAX9485_SCALE_768 | MAX9485_DOUBLE }, + { } /* sentinel */ +}; + +struct max9485_driver_data; + +struct max9485_clk_hw { + struct clk_hw hw; + struct clk_init_data init; + u8 enable_bit; + struct max9485_driver_data *drvdata; +}; + +struct max9485_driver_data { + struct clk *xclk; + struct i2c_client *client; + u8 reg_value; + struct regulator *supply; + struct gpio_desc *reset_gpio; + struct max9485_clk_hw hw[MAX9485_NUM_CLKS]; +}; + +static inline struct max9485_clk_hw *to_max9485_clk(struct clk_hw *hw) +{ + return container_of(hw, struct max9485_clk_hw, hw); +} + +static int max9485_update_bits(struct max9485_driver_data *drvdata, + u8 mask, u8 value) +{ + int ret; + + drvdata->reg_value &= ~mask; + drvdata->reg_value |= value; + + dev_dbg(&drvdata->client->dev, + "updating mask 0x%02x value 0x%02x -> 0x%02x\n", + mask, value, drvdata->reg_value); + + ret = i2c_master_send(drvdata->client, + &drvdata->reg_value, + sizeof(drvdata->reg_value)); + + return ret < 0 ? ret : 0; +} + +static int max9485_clk_prepare(struct clk_hw *hw) +{ + struct max9485_clk_hw *clk_hw = to_max9485_clk(hw); + + return max9485_update_bits(clk_hw->drvdata, + clk_hw->enable_bit, + clk_hw->enable_bit); +} + +static void max9485_clk_unprepare(struct clk_hw *hw) +{ + struct max9485_clk_hw *clk_hw = to_max9485_clk(hw); + + max9485_update_bits(clk_hw->drvdata, clk_hw->enable_bit, 0); +} + +/* + * CLKOUT - configurable clock output + */ +static int max9485_clkout_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + struct max9485_clk_hw *clk_hw = to_max9485_clk(hw); + const struct max9485_rate *entry; + + for (entry = max9485_rates; entry->out != 0; entry++) + if (entry->out == rate) + break; + + if (entry->out == 0) + return -EINVAL; + + return max9485_update_bits(clk_hw->drvdata, + MAX9485_FREQ_MASK, + entry->reg_value); +} + +static unsigned long max9485_clkout_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct max9485_clk_hw *clk_hw = to_max9485_clk(hw); + struct max9485_driver_data *drvdata = clk_hw->drvdata; + u8 val = drvdata->reg_value & MAX9485_FREQ_MASK; + const struct max9485_rate *entry; + + for (entry = max9485_rates; entry->out != 0; entry++) + if (val == entry->reg_value) + return entry->out; + + return 0; +} + +static long max9485_clkout_round_rate(struct clk_hw *hw, unsigned long rate, + unsigned long *parent_rate) +{ + const struct max9485_rate *curr, *prev = NULL; + + for (curr = max9485_rates; curr->out != 0; curr++) { + /* Exact matches */ + if (curr->out == rate) + return rate; + + /* + * Find the first entry that has a frequency higher than the + * requested one. + */ + if (curr->out > rate) { + unsigned int mid; + + /* + * If this is the first entry, clamp the value to the + * lowest possible frequency. + */ + if (!prev) + return curr->out; + + /* + * Otherwise, determine whether the previous entry or + * current one is closer. + */ + mid = prev->out + ((curr->out - prev->out) / 2); + + return (mid > rate) ? prev->out : curr->out; + } + + prev = curr; + } + + /* If the last entry was still too high, clamp the value */ + return prev->out; +} + +struct max9485_clk { + const char *name; + int parent_index; + const struct clk_ops ops; + u8 enable_bit; +}; + +static const struct max9485_clk max9485_clks[MAX9485_NUM_CLKS] = { + [MAX9485_MCLKOUT] = { + .name = "mclkout", + .parent_index = -1, + .enable_bit = MAX9485_MCLK_ENABLE, + .ops = { + .prepare = max9485_clk_prepare, + .unprepare = max9485_clk_unprepare, + }, + }, + [MAX9485_CLKOUT] = { + .name = "clkout", + .parent_index = -1, + .ops = { + .set_rate = max9485_clkout_set_rate, + .round_rate = max9485_clkout_round_rate, + .recalc_rate = max9485_clkout_recalc_rate, + }, + }, + [MAX9485_CLKOUT1] = { + .name = "clkout1", + .parent_index = MAX9485_CLKOUT, + .enable_bit = MAX9485_CLKOUT1_ENABLE, + .ops = { + .prepare = max9485_clk_prepare, + .unprepare = max9485_clk_unprepare, + }, + }, + [MAX9485_CLKOUT2] = { + .name = "clkout2", + .parent_index = MAX9485_CLKOUT, + .enable_bit = MAX9485_CLKOUT2_ENABLE, + .ops = { + .prepare = max9485_clk_prepare, + .unprepare = max9485_clk_unprepare, + }, + }, +}; + +static struct clk_hw * +max9485_of_clk_get(struct of_phandle_args *clkspec, void *data) +{ + struct max9485_driver_data *drvdata = data; + unsigned int idx = clkspec->args[0]; + + return &drvdata->hw[idx].hw; +} + +static int max9485_i2c_probe(struct i2c_client *client) +{ + struct max9485_driver_data *drvdata; + struct device *dev = &client->dev; + const char *xclk_name; + int i, ret; + + drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL); + if (!drvdata) + return -ENOMEM; + + drvdata->xclk = devm_clk_get(dev, "xclk"); + if (IS_ERR(drvdata->xclk)) + return PTR_ERR(drvdata->xclk); + + xclk_name = __clk_get_name(drvdata->xclk); + + drvdata->supply = devm_regulator_get(dev, "vdd"); + if (IS_ERR(drvdata->supply)) + return PTR_ERR(drvdata->supply); + + ret = regulator_enable(drvdata->supply); + if (ret < 0) + return ret; + + drvdata->reset_gpio = + devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH); + if (IS_ERR(drvdata->reset_gpio)) + return PTR_ERR(drvdata->reset_gpio); + + i2c_set_clientdata(client, drvdata); + drvdata->client = client; + + ret = i2c_master_recv(drvdata->client, &drvdata->reg_value, + sizeof(drvdata->reg_value)); + if (ret < 0) { + dev_warn(dev, "Unable to read device register: %d\n", ret); + return ret; + } + + for (i = 0; i < MAX9485_NUM_CLKS; i++) { + int parent_index = max9485_clks[i].parent_index; + const char *name; + + if (of_property_read_string_index(dev->of_node, + "clock-output-names", + i, &name) == 0) { + drvdata->hw[i].init.name = name; + } else { + drvdata->hw[i].init.name = max9485_clks[i].name; + } + + drvdata->hw[i].init.ops = &max9485_clks[i].ops; + drvdata->hw[i].init.num_parents = 1; + drvdata->hw[i].init.flags = 0; + + if (parent_index > 0) { + drvdata->hw[i].init.parent_names = + &drvdata->hw[parent_index].init.name; + drvdata->hw[i].init.flags |= CLK_SET_RATE_PARENT; + } else { + drvdata->hw[i].init.parent_names = &xclk_name; + } + + drvdata->hw[i].enable_bit = max9485_clks[i].enable_bit; + drvdata->hw[i].hw.init = &drvdata->hw[i].init; + drvdata->hw[i].drvdata = drvdata; + + ret = devm_clk_hw_register(dev, &drvdata->hw[i].hw); + if (ret < 0) + return ret; + } + + return devm_of_clk_add_hw_provider(dev, max9485_of_clk_get, drvdata); +} + +static int __maybe_unused max9485_suspend(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct max9485_driver_data *drvdata = i2c_get_clientdata(client); + + gpiod_set_value_cansleep(drvdata->reset_gpio, 0); + + return 0; +} + +static int __maybe_unused max9485_resume(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct max9485_driver_data *drvdata = i2c_get_clientdata(client); + int ret; + + gpiod_set_value_cansleep(drvdata->reset_gpio, 1); + + ret = i2c_master_send(client, &drvdata->reg_value, + sizeof(drvdata->reg_value)); + + return ret < 0 ? ret : 0; +} + +static const struct dev_pm_ops max9485_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(max9485_suspend, max9485_resume) +}; + +static const struct of_device_id max9485_dt_ids[] = { + { .compatible = "maxim,max9485", }, + { } +}; +MODULE_DEVICE_TABLE(of, max9485_dt_ids); + +static const struct i2c_device_id max9485_i2c_ids[] = { + { .name = "max9485", }, + { } +}; +MODULE_DEVICE_TABLE(i2c, max9485_i2c_ids); + +static struct i2c_driver max9485_driver = { + .driver = { + .name = "max9485", + .pm = &max9485_pm_ops, + .of_match_table = max9485_dt_ids, + }, + .probe_new = max9485_i2c_probe, + .id_table = max9485_i2c_ids, +}; +module_i2c_driver(max9485_driver); + +MODULE_AUTHOR("Daniel Mack <daniel@zonque.org>"); +MODULE_DESCRIPTION("MAX9485 Programmable Audio Clock Generator"); +MODULE_LICENSE("GPL v2"); |