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authorLibravatar Linus Torvalds <torvalds@linux-foundation.org>2023-02-21 18:24:12 -0800
committerLibravatar Linus Torvalds <torvalds@linux-foundation.org>2023-02-21 18:24:12 -0800
commit5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 (patch)
treecc5c2d0a898769fd59549594fedb3ee6f84e59a0 /drivers/clk/pistachio/clk-pll.c
downloadlinux-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/pistachio/clk-pll.c')
-rw-r--r--drivers/clk/pistachio/clk-pll.c510
1 files changed, 510 insertions, 0 deletions
diff --git a/drivers/clk/pistachio/clk-pll.c b/drivers/clk/pistachio/clk-pll.c
new file mode 100644
index 000000000..025b9df76
--- /dev/null
+++ b/drivers/clk/pistachio/clk-pll.c
@@ -0,0 +1,510 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2014 Google, Inc.
+ */
+
+#define pr_fmt(fmt) "%s: " fmt, __func__
+
+#include <linux/clk-provider.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/printk.h>
+#include <linux/slab.h>
+
+#include "clk.h"
+
+#define PLL_STATUS 0x0
+#define PLL_STATUS_LOCK BIT(0)
+
+#define PLL_CTRL1 0x4
+#define PLL_CTRL1_REFDIV_SHIFT 0
+#define PLL_CTRL1_REFDIV_MASK 0x3f
+#define PLL_CTRL1_FBDIV_SHIFT 6
+#define PLL_CTRL1_FBDIV_MASK 0xfff
+#define PLL_INT_CTRL1_POSTDIV1_SHIFT 18
+#define PLL_INT_CTRL1_POSTDIV1_MASK 0x7
+#define PLL_INT_CTRL1_POSTDIV2_SHIFT 21
+#define PLL_INT_CTRL1_POSTDIV2_MASK 0x7
+#define PLL_INT_CTRL1_PD BIT(24)
+#define PLL_INT_CTRL1_DSMPD BIT(25)
+#define PLL_INT_CTRL1_FOUTPOSTDIVPD BIT(26)
+#define PLL_INT_CTRL1_FOUTVCOPD BIT(27)
+
+#define PLL_CTRL2 0x8
+#define PLL_FRAC_CTRL2_FRAC_SHIFT 0
+#define PLL_FRAC_CTRL2_FRAC_MASK 0xffffff
+#define PLL_FRAC_CTRL2_POSTDIV1_SHIFT 24
+#define PLL_FRAC_CTRL2_POSTDIV1_MASK 0x7
+#define PLL_FRAC_CTRL2_POSTDIV2_SHIFT 27
+#define PLL_FRAC_CTRL2_POSTDIV2_MASK 0x7
+#define PLL_INT_CTRL2_BYPASS BIT(28)
+
+#define PLL_CTRL3 0xc
+#define PLL_FRAC_CTRL3_PD BIT(0)
+#define PLL_FRAC_CTRL3_DACPD BIT(1)
+#define PLL_FRAC_CTRL3_DSMPD BIT(2)
+#define PLL_FRAC_CTRL3_FOUTPOSTDIVPD BIT(3)
+#define PLL_FRAC_CTRL3_FOUT4PHASEPD BIT(4)
+#define PLL_FRAC_CTRL3_FOUTVCOPD BIT(5)
+
+#define PLL_CTRL4 0x10
+#define PLL_FRAC_CTRL4_BYPASS BIT(28)
+
+#define MIN_PFD 9600000UL
+#define MIN_VCO_LA 400000000UL
+#define MAX_VCO_LA 1600000000UL
+#define MIN_VCO_FRAC_INT 600000000UL
+#define MAX_VCO_FRAC_INT 1600000000UL
+#define MIN_VCO_FRAC_FRAC 600000000UL
+#define MAX_VCO_FRAC_FRAC 2400000000UL
+#define MIN_OUTPUT_LA 8000000UL
+#define MAX_OUTPUT_LA 1600000000UL
+#define MIN_OUTPUT_FRAC 12000000UL
+#define MAX_OUTPUT_FRAC 1600000000UL
+
+/* Fractional PLL operating modes */
+enum pll_mode {
+ PLL_MODE_FRAC,
+ PLL_MODE_INT,
+};
+
+struct pistachio_clk_pll {
+ struct clk_hw hw;
+ void __iomem *base;
+ struct pistachio_pll_rate_table *rates;
+ unsigned int nr_rates;
+};
+
+static inline u32 pll_readl(struct pistachio_clk_pll *pll, u32 reg)
+{
+ return readl(pll->base + reg);
+}
+
+static inline void pll_writel(struct pistachio_clk_pll *pll, u32 val, u32 reg)
+{
+ writel(val, pll->base + reg);
+}
+
+static inline void pll_lock(struct pistachio_clk_pll *pll)
+{
+ while (!(pll_readl(pll, PLL_STATUS) & PLL_STATUS_LOCK))
+ cpu_relax();
+}
+
+static inline u64 do_div_round_closest(u64 dividend, u64 divisor)
+{
+ dividend += divisor / 2;
+ return div64_u64(dividend, divisor);
+}
+
+static inline struct pistachio_clk_pll *to_pistachio_pll(struct clk_hw *hw)
+{
+ return container_of(hw, struct pistachio_clk_pll, hw);
+}
+
+static inline enum pll_mode pll_frac_get_mode(struct clk_hw *hw)
+{
+ struct pistachio_clk_pll *pll = to_pistachio_pll(hw);
+ u32 val;
+
+ val = pll_readl(pll, PLL_CTRL3) & PLL_FRAC_CTRL3_DSMPD;
+ return val ? PLL_MODE_INT : PLL_MODE_FRAC;
+}
+
+static inline void pll_frac_set_mode(struct clk_hw *hw, enum pll_mode mode)
+{
+ struct pistachio_clk_pll *pll = to_pistachio_pll(hw);
+ u32 val;
+
+ val = pll_readl(pll, PLL_CTRL3);
+ if (mode == PLL_MODE_INT)
+ val |= PLL_FRAC_CTRL3_DSMPD | PLL_FRAC_CTRL3_DACPD;
+ else
+ val &= ~(PLL_FRAC_CTRL3_DSMPD | PLL_FRAC_CTRL3_DACPD);
+
+ pll_writel(pll, val, PLL_CTRL3);
+}
+
+static struct pistachio_pll_rate_table *
+pll_get_params(struct pistachio_clk_pll *pll, unsigned long fref,
+ unsigned long fout)
+{
+ unsigned int i;
+
+ for (i = 0; i < pll->nr_rates; i++) {
+ if (pll->rates[i].fref == fref && pll->rates[i].fout == fout)
+ return &pll->rates[i];
+ }
+
+ return NULL;
+}
+
+static long pll_round_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long *parent_rate)
+{
+ struct pistachio_clk_pll *pll = to_pistachio_pll(hw);
+ unsigned int i;
+
+ for (i = 0; i < pll->nr_rates; i++) {
+ if (i > 0 && pll->rates[i].fref == *parent_rate &&
+ pll->rates[i].fout <= rate)
+ return pll->rates[i - 1].fout;
+ }
+
+ return pll->rates[0].fout;
+}
+
+static int pll_gf40lp_frac_enable(struct clk_hw *hw)
+{
+ struct pistachio_clk_pll *pll = to_pistachio_pll(hw);
+ u32 val;
+
+ val = pll_readl(pll, PLL_CTRL3);
+ val &= ~(PLL_FRAC_CTRL3_PD | PLL_FRAC_CTRL3_FOUTPOSTDIVPD |
+ PLL_FRAC_CTRL3_FOUT4PHASEPD | PLL_FRAC_CTRL3_FOUTVCOPD);
+ pll_writel(pll, val, PLL_CTRL3);
+
+ val = pll_readl(pll, PLL_CTRL4);
+ val &= ~PLL_FRAC_CTRL4_BYPASS;
+ pll_writel(pll, val, PLL_CTRL4);
+
+ pll_lock(pll);
+
+ return 0;
+}
+
+static void pll_gf40lp_frac_disable(struct clk_hw *hw)
+{
+ struct pistachio_clk_pll *pll = to_pistachio_pll(hw);
+ u32 val;
+
+ val = pll_readl(pll, PLL_CTRL3);
+ val |= PLL_FRAC_CTRL3_PD;
+ pll_writel(pll, val, PLL_CTRL3);
+}
+
+static int pll_gf40lp_frac_is_enabled(struct clk_hw *hw)
+{
+ struct pistachio_clk_pll *pll = to_pistachio_pll(hw);
+
+ return !(pll_readl(pll, PLL_CTRL3) & PLL_FRAC_CTRL3_PD);
+}
+
+static int pll_gf40lp_frac_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct pistachio_clk_pll *pll = to_pistachio_pll(hw);
+ struct pistachio_pll_rate_table *params;
+ int enabled = pll_gf40lp_frac_is_enabled(hw);
+ u64 val, vco, old_postdiv1, old_postdiv2;
+ const char *name = clk_hw_get_name(hw);
+
+ if (rate < MIN_OUTPUT_FRAC || rate > MAX_OUTPUT_FRAC)
+ return -EINVAL;
+
+ params = pll_get_params(pll, parent_rate, rate);
+ if (!params || !params->refdiv)
+ return -EINVAL;
+
+ /* calculate vco */
+ vco = params->fref;
+ vco *= (params->fbdiv << 24) + params->frac;
+ vco = div64_u64(vco, params->refdiv << 24);
+
+ if (vco < MIN_VCO_FRAC_FRAC || vco > MAX_VCO_FRAC_FRAC)
+ pr_warn("%s: VCO %llu is out of range %lu..%lu\n", name, vco,
+ MIN_VCO_FRAC_FRAC, MAX_VCO_FRAC_FRAC);
+
+ val = div64_u64(params->fref, params->refdiv);
+ if (val < MIN_PFD)
+ pr_warn("%s: PFD %llu is too low (min %lu)\n",
+ name, val, MIN_PFD);
+ if (val > vco / 16)
+ pr_warn("%s: PFD %llu is too high (max %llu)\n",
+ name, val, vco / 16);
+
+ val = pll_readl(pll, PLL_CTRL1);
+ val &= ~((PLL_CTRL1_REFDIV_MASK << PLL_CTRL1_REFDIV_SHIFT) |
+ (PLL_CTRL1_FBDIV_MASK << PLL_CTRL1_FBDIV_SHIFT));
+ val |= (params->refdiv << PLL_CTRL1_REFDIV_SHIFT) |
+ (params->fbdiv << PLL_CTRL1_FBDIV_SHIFT);
+ pll_writel(pll, val, PLL_CTRL1);
+
+ val = pll_readl(pll, PLL_CTRL2);
+
+ old_postdiv1 = (val >> PLL_FRAC_CTRL2_POSTDIV1_SHIFT) &
+ PLL_FRAC_CTRL2_POSTDIV1_MASK;
+ old_postdiv2 = (val >> PLL_FRAC_CTRL2_POSTDIV2_SHIFT) &
+ PLL_FRAC_CTRL2_POSTDIV2_MASK;
+ if (enabled &&
+ (params->postdiv1 != old_postdiv1 ||
+ params->postdiv2 != old_postdiv2))
+ pr_warn("%s: changing postdiv while PLL is enabled\n", name);
+
+ if (params->postdiv2 > params->postdiv1)
+ pr_warn("%s: postdiv2 should not exceed postdiv1\n", name);
+
+ val &= ~((PLL_FRAC_CTRL2_FRAC_MASK << PLL_FRAC_CTRL2_FRAC_SHIFT) |
+ (PLL_FRAC_CTRL2_POSTDIV1_MASK <<
+ PLL_FRAC_CTRL2_POSTDIV1_SHIFT) |
+ (PLL_FRAC_CTRL2_POSTDIV2_MASK <<
+ PLL_FRAC_CTRL2_POSTDIV2_SHIFT));
+ val |= (params->frac << PLL_FRAC_CTRL2_FRAC_SHIFT) |
+ (params->postdiv1 << PLL_FRAC_CTRL2_POSTDIV1_SHIFT) |
+ (params->postdiv2 << PLL_FRAC_CTRL2_POSTDIV2_SHIFT);
+ pll_writel(pll, val, PLL_CTRL2);
+
+ /* set operating mode */
+ if (params->frac)
+ pll_frac_set_mode(hw, PLL_MODE_FRAC);
+ else
+ pll_frac_set_mode(hw, PLL_MODE_INT);
+
+ if (enabled)
+ pll_lock(pll);
+
+ return 0;
+}
+
+static unsigned long pll_gf40lp_frac_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct pistachio_clk_pll *pll = to_pistachio_pll(hw);
+ u64 val, prediv, fbdiv, frac, postdiv1, postdiv2, rate;
+
+ val = pll_readl(pll, PLL_CTRL1);
+ prediv = (val >> PLL_CTRL1_REFDIV_SHIFT) & PLL_CTRL1_REFDIV_MASK;
+ fbdiv = (val >> PLL_CTRL1_FBDIV_SHIFT) & PLL_CTRL1_FBDIV_MASK;
+
+ val = pll_readl(pll, PLL_CTRL2);
+ postdiv1 = (val >> PLL_FRAC_CTRL2_POSTDIV1_SHIFT) &
+ PLL_FRAC_CTRL2_POSTDIV1_MASK;
+ postdiv2 = (val >> PLL_FRAC_CTRL2_POSTDIV2_SHIFT) &
+ PLL_FRAC_CTRL2_POSTDIV2_MASK;
+ frac = (val >> PLL_FRAC_CTRL2_FRAC_SHIFT) & PLL_FRAC_CTRL2_FRAC_MASK;
+
+ /* get operating mode (int/frac) and calculate rate accordingly */
+ rate = parent_rate;
+ if (pll_frac_get_mode(hw) == PLL_MODE_FRAC)
+ rate *= (fbdiv << 24) + frac;
+ else
+ rate *= (fbdiv << 24);
+
+ rate = do_div_round_closest(rate, (prediv * postdiv1 * postdiv2) << 24);
+
+ return rate;
+}
+
+static const struct clk_ops pll_gf40lp_frac_ops = {
+ .enable = pll_gf40lp_frac_enable,
+ .disable = pll_gf40lp_frac_disable,
+ .is_enabled = pll_gf40lp_frac_is_enabled,
+ .recalc_rate = pll_gf40lp_frac_recalc_rate,
+ .round_rate = pll_round_rate,
+ .set_rate = pll_gf40lp_frac_set_rate,
+};
+
+static const struct clk_ops pll_gf40lp_frac_fixed_ops = {
+ .enable = pll_gf40lp_frac_enable,
+ .disable = pll_gf40lp_frac_disable,
+ .is_enabled = pll_gf40lp_frac_is_enabled,
+ .recalc_rate = pll_gf40lp_frac_recalc_rate,
+};
+
+static int pll_gf40lp_laint_enable(struct clk_hw *hw)
+{
+ struct pistachio_clk_pll *pll = to_pistachio_pll(hw);
+ u32 val;
+
+ val = pll_readl(pll, PLL_CTRL1);
+ val &= ~(PLL_INT_CTRL1_PD |
+ PLL_INT_CTRL1_FOUTPOSTDIVPD | PLL_INT_CTRL1_FOUTVCOPD);
+ pll_writel(pll, val, PLL_CTRL1);
+
+ val = pll_readl(pll, PLL_CTRL2);
+ val &= ~PLL_INT_CTRL2_BYPASS;
+ pll_writel(pll, val, PLL_CTRL2);
+
+ pll_lock(pll);
+
+ return 0;
+}
+
+static void pll_gf40lp_laint_disable(struct clk_hw *hw)
+{
+ struct pistachio_clk_pll *pll = to_pistachio_pll(hw);
+ u32 val;
+
+ val = pll_readl(pll, PLL_CTRL1);
+ val |= PLL_INT_CTRL1_PD;
+ pll_writel(pll, val, PLL_CTRL1);
+}
+
+static int pll_gf40lp_laint_is_enabled(struct clk_hw *hw)
+{
+ struct pistachio_clk_pll *pll = to_pistachio_pll(hw);
+
+ return !(pll_readl(pll, PLL_CTRL1) & PLL_INT_CTRL1_PD);
+}
+
+static int pll_gf40lp_laint_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct pistachio_clk_pll *pll = to_pistachio_pll(hw);
+ struct pistachio_pll_rate_table *params;
+ int enabled = pll_gf40lp_laint_is_enabled(hw);
+ u32 val, vco, old_postdiv1, old_postdiv2;
+ const char *name = clk_hw_get_name(hw);
+
+ if (rate < MIN_OUTPUT_LA || rate > MAX_OUTPUT_LA)
+ return -EINVAL;
+
+ params = pll_get_params(pll, parent_rate, rate);
+ if (!params || !params->refdiv)
+ return -EINVAL;
+
+ vco = div_u64(params->fref * params->fbdiv, params->refdiv);
+ if (vco < MIN_VCO_LA || vco > MAX_VCO_LA)
+ pr_warn("%s: VCO %u is out of range %lu..%lu\n", name, vco,
+ MIN_VCO_LA, MAX_VCO_LA);
+
+ val = div_u64(params->fref, params->refdiv);
+ if (val < MIN_PFD)
+ pr_warn("%s: PFD %u is too low (min %lu)\n",
+ name, val, MIN_PFD);
+ if (val > vco / 16)
+ pr_warn("%s: PFD %u is too high (max %u)\n",
+ name, val, vco / 16);
+
+ val = pll_readl(pll, PLL_CTRL1);
+
+ old_postdiv1 = (val >> PLL_INT_CTRL1_POSTDIV1_SHIFT) &
+ PLL_INT_CTRL1_POSTDIV1_MASK;
+ old_postdiv2 = (val >> PLL_INT_CTRL1_POSTDIV2_SHIFT) &
+ PLL_INT_CTRL1_POSTDIV2_MASK;
+ if (enabled &&
+ (params->postdiv1 != old_postdiv1 ||
+ params->postdiv2 != old_postdiv2))
+ pr_warn("%s: changing postdiv while PLL is enabled\n", name);
+
+ if (params->postdiv2 > params->postdiv1)
+ pr_warn("%s: postdiv2 should not exceed postdiv1\n", name);
+
+ val &= ~((PLL_CTRL1_REFDIV_MASK << PLL_CTRL1_REFDIV_SHIFT) |
+ (PLL_CTRL1_FBDIV_MASK << PLL_CTRL1_FBDIV_SHIFT) |
+ (PLL_INT_CTRL1_POSTDIV1_MASK << PLL_INT_CTRL1_POSTDIV1_SHIFT) |
+ (PLL_INT_CTRL1_POSTDIV2_MASK << PLL_INT_CTRL1_POSTDIV2_SHIFT));
+ val |= (params->refdiv << PLL_CTRL1_REFDIV_SHIFT) |
+ (params->fbdiv << PLL_CTRL1_FBDIV_SHIFT) |
+ (params->postdiv1 << PLL_INT_CTRL1_POSTDIV1_SHIFT) |
+ (params->postdiv2 << PLL_INT_CTRL1_POSTDIV2_SHIFT);
+ pll_writel(pll, val, PLL_CTRL1);
+
+ if (enabled)
+ pll_lock(pll);
+
+ return 0;
+}
+
+static unsigned long pll_gf40lp_laint_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct pistachio_clk_pll *pll = to_pistachio_pll(hw);
+ u32 val, prediv, fbdiv, postdiv1, postdiv2;
+ u64 rate = parent_rate;
+
+ val = pll_readl(pll, PLL_CTRL1);
+ prediv = (val >> PLL_CTRL1_REFDIV_SHIFT) & PLL_CTRL1_REFDIV_MASK;
+ fbdiv = (val >> PLL_CTRL1_FBDIV_SHIFT) & PLL_CTRL1_FBDIV_MASK;
+ postdiv1 = (val >> PLL_INT_CTRL1_POSTDIV1_SHIFT) &
+ PLL_INT_CTRL1_POSTDIV1_MASK;
+ postdiv2 = (val >> PLL_INT_CTRL1_POSTDIV2_SHIFT) &
+ PLL_INT_CTRL1_POSTDIV2_MASK;
+
+ rate *= fbdiv;
+ rate = do_div_round_closest(rate, prediv * postdiv1 * postdiv2);
+
+ return rate;
+}
+
+static const struct clk_ops pll_gf40lp_laint_ops = {
+ .enable = pll_gf40lp_laint_enable,
+ .disable = pll_gf40lp_laint_disable,
+ .is_enabled = pll_gf40lp_laint_is_enabled,
+ .recalc_rate = pll_gf40lp_laint_recalc_rate,
+ .round_rate = pll_round_rate,
+ .set_rate = pll_gf40lp_laint_set_rate,
+};
+
+static const struct clk_ops pll_gf40lp_laint_fixed_ops = {
+ .enable = pll_gf40lp_laint_enable,
+ .disable = pll_gf40lp_laint_disable,
+ .is_enabled = pll_gf40lp_laint_is_enabled,
+ .recalc_rate = pll_gf40lp_laint_recalc_rate,
+};
+
+static struct clk *pll_register(const char *name, const char *parent_name,
+ unsigned long flags, void __iomem *base,
+ enum pistachio_pll_type type,
+ struct pistachio_pll_rate_table *rates,
+ unsigned int nr_rates)
+{
+ struct pistachio_clk_pll *pll;
+ struct clk_init_data init;
+ struct clk *clk;
+
+ pll = kzalloc(sizeof(*pll), GFP_KERNEL);
+ if (!pll)
+ return ERR_PTR(-ENOMEM);
+
+ init.name = name;
+ init.flags = flags | CLK_GET_RATE_NOCACHE;
+ init.parent_names = &parent_name;
+ init.num_parents = 1;
+
+ switch (type) {
+ case PLL_GF40LP_FRAC:
+ if (rates)
+ init.ops = &pll_gf40lp_frac_ops;
+ else
+ init.ops = &pll_gf40lp_frac_fixed_ops;
+ break;
+ case PLL_GF40LP_LAINT:
+ if (rates)
+ init.ops = &pll_gf40lp_laint_ops;
+ else
+ init.ops = &pll_gf40lp_laint_fixed_ops;
+ break;
+ default:
+ pr_err("Unrecognized PLL type %u\n", type);
+ kfree(pll);
+ return ERR_PTR(-EINVAL);
+ }
+
+ pll->hw.init = &init;
+ pll->base = base;
+ pll->rates = rates;
+ pll->nr_rates = nr_rates;
+
+ clk = clk_register(NULL, &pll->hw);
+ if (IS_ERR(clk))
+ kfree(pll);
+
+ return clk;
+}
+
+void pistachio_clk_register_pll(struct pistachio_clk_provider *p,
+ struct pistachio_pll *pll,
+ unsigned int num)
+{
+ struct clk *clk;
+ unsigned int i;
+
+ for (i = 0; i < num; i++) {
+ clk = pll_register(pll[i].name, pll[i].parent,
+ 0, p->base + pll[i].reg_base,
+ pll[i].type, pll[i].rates,
+ pll[i].nr_rates);
+ p->clk_data.clks[pll[i].id] = clk;
+ }
+}