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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/axs10x/pll_clock.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 'drivers/clk/axs10x/pll_clock.c')
-rw-r--r-- | drivers/clk/axs10x/pll_clock.c | 341 |
1 files changed, 341 insertions, 0 deletions
diff --git a/drivers/clk/axs10x/pll_clock.c b/drivers/clk/axs10x/pll_clock.c new file mode 100644 index 000000000..90fb0e6ff --- /dev/null +++ b/drivers/clk/axs10x/pll_clock.c @@ -0,0 +1,341 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Synopsys AXS10X SDP Generic PLL clock driver + * + * Copyright (C) 2017 Synopsys + */ + +#include <linux/platform_device.h> +#include <linux/module.h> +#include <linux/clk-provider.h> +#include <linux/delay.h> +#include <linux/err.h> +#include <linux/device.h> +#include <linux/io.h> +#include <linux/of_address.h> +#include <linux/of_device.h> +#include <linux/slab.h> +#include <linux/of.h> + +/* PLL registers addresses */ +#define PLL_REG_IDIV 0x0 +#define PLL_REG_FBDIV 0x4 +#define PLL_REG_ODIV 0x8 + +/* + * Bit fields of the PLL IDIV/FBDIV/ODIV registers: + * ________________________________________________________________________ + * |31 15| 14 | 13 | 12 |11 6|5 0| + * |-------RESRVED------|-NOUPDATE-|-BYPASS-|-EDGE-|--HIGHTIME--|--LOWTIME--| + * |____________________|__________|________|______|____________|___________| + * + * Following macros determine the way of access to these registers + * They should be set up only using the macros. + * reg should be an u32 variable. + */ + +#define PLL_REG_GET_LOW(reg) \ + (((reg) & (0x3F << 0)) >> 0) +#define PLL_REG_GET_HIGH(reg) \ + (((reg) & (0x3F << 6)) >> 6) +#define PLL_REG_GET_EDGE(reg) \ + (((reg) & (BIT(12))) ? 1 : 0) +#define PLL_REG_GET_BYPASS(reg) \ + (((reg) & (BIT(13))) ? 1 : 0) +#define PLL_REG_GET_NOUPD(reg) \ + (((reg) & (BIT(14))) ? 1 : 0) +#define PLL_REG_GET_PAD(reg) \ + (((reg) & (0x1FFFF << 15)) >> 15) + +#define PLL_REG_SET_LOW(reg, value) \ + { reg |= (((value) & 0x3F) << 0); } +#define PLL_REG_SET_HIGH(reg, value) \ + { reg |= (((value) & 0x3F) << 6); } +#define PLL_REG_SET_EDGE(reg, value) \ + { reg |= (((value) & 0x01) << 12); } +#define PLL_REG_SET_BYPASS(reg, value) \ + { reg |= (((value) & 0x01) << 13); } +#define PLL_REG_SET_NOUPD(reg, value) \ + { reg |= (((value) & 0x01) << 14); } +#define PLL_REG_SET_PAD(reg, value) \ + { reg |= (((value) & 0x1FFFF) << 15); } + +#define PLL_LOCK BIT(0) +#define PLL_ERROR BIT(1) +#define PLL_MAX_LOCK_TIME 100 /* 100 us */ + +struct axs10x_pll_cfg { + u32 rate; + u32 idiv; + u32 fbdiv; + u32 odiv; +}; + +static const struct axs10x_pll_cfg arc_pll_cfg[] = { + { 33333333, 1, 1, 1 }, + { 50000000, 1, 30, 20 }, + { 75000000, 2, 45, 10 }, + { 90000000, 2, 54, 10 }, + { 100000000, 1, 30, 10 }, + { 125000000, 2, 45, 6 }, + {} +}; + +static const struct axs10x_pll_cfg pgu_pll_cfg[] = { + { 25200000, 1, 84, 90 }, + { 50000000, 1, 100, 54 }, + { 74250000, 1, 44, 16 }, + {} +}; + +struct axs10x_pll_clk { + struct clk_hw hw; + void __iomem *base; + void __iomem *lock; + const struct axs10x_pll_cfg *pll_cfg; + struct device *dev; +}; + +static inline void axs10x_pll_write(struct axs10x_pll_clk *clk, u32 reg, + u32 val) +{ + iowrite32(val, clk->base + reg); +} + +static inline u32 axs10x_pll_read(struct axs10x_pll_clk *clk, u32 reg) +{ + return ioread32(clk->base + reg); +} + +static inline struct axs10x_pll_clk *to_axs10x_pll_clk(struct clk_hw *hw) +{ + return container_of(hw, struct axs10x_pll_clk, hw); +} + +static inline u32 axs10x_div_get_value(u32 reg) +{ + if (PLL_REG_GET_BYPASS(reg)) + return 1; + + return PLL_REG_GET_HIGH(reg) + PLL_REG_GET_LOW(reg); +} + +static inline u32 axs10x_encode_div(unsigned int id, int upd) +{ + u32 div = 0; + + PLL_REG_SET_LOW(div, (id % 2 == 0) ? id >> 1 : (id >> 1) + 1); + PLL_REG_SET_HIGH(div, id >> 1); + PLL_REG_SET_EDGE(div, id % 2); + PLL_REG_SET_BYPASS(div, id == 1 ? 1 : 0); + PLL_REG_SET_NOUPD(div, upd == 0 ? 1 : 0); + + return div; +} + +static unsigned long axs10x_pll_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + u64 rate; + u32 idiv, fbdiv, odiv; + struct axs10x_pll_clk *clk = to_axs10x_pll_clk(hw); + + idiv = axs10x_div_get_value(axs10x_pll_read(clk, PLL_REG_IDIV)); + fbdiv = axs10x_div_get_value(axs10x_pll_read(clk, PLL_REG_FBDIV)); + odiv = axs10x_div_get_value(axs10x_pll_read(clk, PLL_REG_ODIV)); + + rate = (u64)parent_rate * fbdiv; + do_div(rate, idiv * odiv); + + return rate; +} + +static long axs10x_pll_round_rate(struct clk_hw *hw, unsigned long rate, + unsigned long *prate) +{ + int i; + long best_rate; + struct axs10x_pll_clk *clk = to_axs10x_pll_clk(hw); + const struct axs10x_pll_cfg *pll_cfg = clk->pll_cfg; + + if (pll_cfg[0].rate == 0) + return -EINVAL; + + best_rate = pll_cfg[0].rate; + + for (i = 1; pll_cfg[i].rate != 0; i++) { + if (abs(rate - pll_cfg[i].rate) < abs(rate - best_rate)) + best_rate = pll_cfg[i].rate; + } + + return best_rate; +} + +static int axs10x_pll_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + int i; + struct axs10x_pll_clk *clk = to_axs10x_pll_clk(hw); + const struct axs10x_pll_cfg *pll_cfg = clk->pll_cfg; + + for (i = 0; pll_cfg[i].rate != 0; i++) { + if (pll_cfg[i].rate == rate) { + axs10x_pll_write(clk, PLL_REG_IDIV, + axs10x_encode_div(pll_cfg[i].idiv, 0)); + axs10x_pll_write(clk, PLL_REG_FBDIV, + axs10x_encode_div(pll_cfg[i].fbdiv, 0)); + axs10x_pll_write(clk, PLL_REG_ODIV, + axs10x_encode_div(pll_cfg[i].odiv, 1)); + + /* + * Wait until CGU relocks and check error status. + * If after timeout CGU is unlocked yet return error + */ + udelay(PLL_MAX_LOCK_TIME); + if (!(ioread32(clk->lock) & PLL_LOCK)) + return -ETIMEDOUT; + + if (ioread32(clk->lock) & PLL_ERROR) + return -EINVAL; + + return 0; + } + } + + dev_err(clk->dev, "invalid rate=%ld, parent_rate=%ld\n", rate, + parent_rate); + return -EINVAL; +} + +static const struct clk_ops axs10x_pll_ops = { + .recalc_rate = axs10x_pll_recalc_rate, + .round_rate = axs10x_pll_round_rate, + .set_rate = axs10x_pll_set_rate, +}; + +static int axs10x_pll_clk_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + const char *parent_name; + struct axs10x_pll_clk *pll_clk; + struct clk_init_data init = { }; + int ret; + + pll_clk = devm_kzalloc(dev, sizeof(*pll_clk), GFP_KERNEL); + if (!pll_clk) + return -ENOMEM; + + pll_clk->base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(pll_clk->base)) + return PTR_ERR(pll_clk->base); + + pll_clk->lock = devm_platform_ioremap_resource(pdev, 1); + if (IS_ERR(pll_clk->lock)) + return PTR_ERR(pll_clk->lock); + + init.name = dev->of_node->name; + init.ops = &axs10x_pll_ops; + parent_name = of_clk_get_parent_name(dev->of_node, 0); + init.parent_names = &parent_name; + init.num_parents = 1; + pll_clk->hw.init = &init; + pll_clk->dev = dev; + pll_clk->pll_cfg = of_device_get_match_data(dev); + + if (!pll_clk->pll_cfg) { + dev_err(dev, "No OF match data provided\n"); + return -EINVAL; + } + + ret = devm_clk_hw_register(dev, &pll_clk->hw); + if (ret) { + dev_err(dev, "failed to register %s clock\n", init.name); + return ret; + } + + return of_clk_add_hw_provider(dev->of_node, of_clk_hw_simple_get, + &pll_clk->hw); +} + +static int axs10x_pll_clk_remove(struct platform_device *pdev) +{ + of_clk_del_provider(pdev->dev.of_node); + return 0; +} + +static void __init of_axs10x_pll_clk_setup(struct device_node *node) +{ + const char *parent_name; + struct axs10x_pll_clk *pll_clk; + struct clk_init_data init = { }; + int ret; + + pll_clk = kzalloc(sizeof(*pll_clk), GFP_KERNEL); + if (!pll_clk) + return; + + pll_clk->base = of_iomap(node, 0); + if (!pll_clk->base) { + pr_err("failed to map pll div registers\n"); + goto err_free_pll_clk; + } + + pll_clk->lock = of_iomap(node, 1); + if (!pll_clk->lock) { + pr_err("failed to map pll lock register\n"); + goto err_unmap_base; + } + + init.name = node->name; + init.ops = &axs10x_pll_ops; + parent_name = of_clk_get_parent_name(node, 0); + init.parent_names = &parent_name; + init.num_parents = parent_name ? 1 : 0; + pll_clk->hw.init = &init; + pll_clk->pll_cfg = arc_pll_cfg; + + ret = clk_hw_register(NULL, &pll_clk->hw); + if (ret) { + pr_err("failed to register %pOFn clock\n", node); + goto err_unmap_lock; + } + + ret = of_clk_add_hw_provider(node, of_clk_hw_simple_get, &pll_clk->hw); + if (ret) { + pr_err("failed to add hw provider for %pOFn clock\n", node); + goto err_unregister_clk; + } + + return; + +err_unregister_clk: + clk_hw_unregister(&pll_clk->hw); +err_unmap_lock: + iounmap(pll_clk->lock); +err_unmap_base: + iounmap(pll_clk->base); +err_free_pll_clk: + kfree(pll_clk); +} +CLK_OF_DECLARE(axs10x_pll_clock, "snps,axs10x-arc-pll-clock", + of_axs10x_pll_clk_setup); + +static const struct of_device_id axs10x_pll_clk_id[] = { + { .compatible = "snps,axs10x-pgu-pll-clock", .data = &pgu_pll_cfg}, + { } +}; +MODULE_DEVICE_TABLE(of, axs10x_pll_clk_id); + +static struct platform_driver axs10x_pll_clk_driver = { + .driver = { + .name = "axs10x-pll-clock", + .of_match_table = axs10x_pll_clk_id, + }, + .probe = axs10x_pll_clk_probe, + .remove = axs10x_pll_clk_remove, +}; +builtin_platform_driver(axs10x_pll_clk_driver); + +MODULE_AUTHOR("Vlad Zakharov <vzakhar@synopsys.com>"); +MODULE_DESCRIPTION("Synopsys AXS10X SDP Generic PLL Clock Driver"); +MODULE_LICENSE("GPL v2"); |