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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 /arch/arm/mach-omap2/cpuidle34xx.c
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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 'arch/arm/mach-omap2/cpuidle34xx.c')
-rw-r--r--arch/arm/mach-omap2/cpuidle34xx.c420
1 files changed, 420 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/cpuidle34xx.c b/arch/arm/mach-omap2/cpuidle34xx.c
new file mode 100644
index 000000000..2ab5dcbfb
--- /dev/null
+++ b/arch/arm/mach-omap2/cpuidle34xx.c
@@ -0,0 +1,420 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * linux/arch/arm/mach-omap2/cpuidle34xx.c
+ *
+ * OMAP3 CPU IDLE Routines
+ *
+ * Copyright (C) 2008 Texas Instruments, Inc.
+ * Rajendra Nayak <rnayak@ti.com>
+ *
+ * Copyright (C) 2007 Texas Instruments, Inc.
+ * Karthik Dasu <karthik-dp@ti.com>
+ *
+ * Copyright (C) 2006 Nokia Corporation
+ * Tony Lindgren <tony@atomide.com>
+ *
+ * Copyright (C) 2005 Texas Instruments, Inc.
+ * Richard Woodruff <r-woodruff2@ti.com>
+ *
+ * Based on pm.c for omap2
+ */
+
+#include <linux/sched.h>
+#include <linux/cpuidle.h>
+#include <linux/export.h>
+#include <linux/cpu_pm.h>
+#include <asm/cpuidle.h>
+
+#include "powerdomain.h"
+#include "clockdomain.h"
+
+#include "pm.h"
+#include "control.h"
+#include "common.h"
+#include "soc.h"
+
+/* Mach specific information to be recorded in the C-state driver_data */
+struct omap3_idle_statedata {
+ u8 mpu_state;
+ u8 core_state;
+ u8 per_min_state;
+ u8 flags;
+};
+
+static struct powerdomain *mpu_pd, *core_pd, *per_pd, *cam_pd;
+
+/*
+ * Possible flag bits for struct omap3_idle_statedata.flags:
+ *
+ * OMAP_CPUIDLE_CX_NO_CLKDM_IDLE: don't allow the MPU clockdomain to go
+ * inactive. This in turn prevents the MPU DPLL from entering autoidle
+ * mode, so wakeup latency is greatly reduced, at the cost of additional
+ * energy consumption. This also prevents the CORE clockdomain from
+ * entering idle.
+ */
+#define OMAP_CPUIDLE_CX_NO_CLKDM_IDLE BIT(0)
+
+/*
+ * Prevent PER OFF if CORE is not in RETention or OFF as this would
+ * disable PER wakeups completely.
+ */
+static struct omap3_idle_statedata omap3_idle_data[] = {
+ {
+ .mpu_state = PWRDM_POWER_ON,
+ .core_state = PWRDM_POWER_ON,
+ /* In C1 do not allow PER state lower than CORE state */
+ .per_min_state = PWRDM_POWER_ON,
+ .flags = OMAP_CPUIDLE_CX_NO_CLKDM_IDLE,
+ },
+ {
+ .mpu_state = PWRDM_POWER_ON,
+ .core_state = PWRDM_POWER_ON,
+ .per_min_state = PWRDM_POWER_RET,
+ },
+ {
+ .mpu_state = PWRDM_POWER_RET,
+ .core_state = PWRDM_POWER_ON,
+ .per_min_state = PWRDM_POWER_RET,
+ },
+ {
+ .mpu_state = PWRDM_POWER_OFF,
+ .core_state = PWRDM_POWER_ON,
+ .per_min_state = PWRDM_POWER_RET,
+ },
+ {
+ .mpu_state = PWRDM_POWER_RET,
+ .core_state = PWRDM_POWER_RET,
+ .per_min_state = PWRDM_POWER_OFF,
+ },
+ {
+ .mpu_state = PWRDM_POWER_OFF,
+ .core_state = PWRDM_POWER_RET,
+ .per_min_state = PWRDM_POWER_OFF,
+ },
+ {
+ .mpu_state = PWRDM_POWER_OFF,
+ .core_state = PWRDM_POWER_OFF,
+ .per_min_state = PWRDM_POWER_OFF,
+ },
+};
+
+/**
+ * omap3_enter_idle - Programs OMAP3 to enter the specified state
+ * @dev: cpuidle device
+ * @drv: cpuidle driver
+ * @index: the index of state to be entered
+ */
+static int omap3_enter_idle(struct cpuidle_device *dev,
+ struct cpuidle_driver *drv,
+ int index)
+{
+ struct omap3_idle_statedata *cx = &omap3_idle_data[index];
+ int error;
+
+ if (omap_irq_pending() || need_resched())
+ goto return_sleep_time;
+
+ /* Deny idle for C1 */
+ if (cx->flags & OMAP_CPUIDLE_CX_NO_CLKDM_IDLE) {
+ clkdm_deny_idle(mpu_pd->pwrdm_clkdms[0]);
+ } else {
+ pwrdm_set_next_pwrst(mpu_pd, cx->mpu_state);
+ pwrdm_set_next_pwrst(core_pd, cx->core_state);
+ }
+
+ /*
+ * Call idle CPU PM enter notifier chain so that
+ * VFP context is saved.
+ */
+ if (cx->mpu_state == PWRDM_POWER_OFF) {
+ error = cpu_pm_enter();
+ if (error)
+ goto out_clkdm_set;
+ }
+
+ /* Execute ARM wfi */
+ omap_sram_idle(true);
+
+ /*
+ * Call idle CPU PM enter notifier chain to restore
+ * VFP context.
+ */
+ if (cx->mpu_state == PWRDM_POWER_OFF &&
+ pwrdm_read_prev_pwrst(mpu_pd) == PWRDM_POWER_OFF)
+ cpu_pm_exit();
+
+out_clkdm_set:
+ /* Re-allow idle for C1 */
+ if (cx->flags & OMAP_CPUIDLE_CX_NO_CLKDM_IDLE)
+ clkdm_allow_idle(mpu_pd->pwrdm_clkdms[0]);
+
+return_sleep_time:
+
+ return index;
+}
+
+/**
+ * next_valid_state - Find next valid C-state
+ * @dev: cpuidle device
+ * @drv: cpuidle driver
+ * @index: Index of currently selected c-state
+ *
+ * If the state corresponding to index is valid, index is returned back
+ * to the caller. Else, this function searches for a lower c-state which is
+ * still valid (as defined in omap3_power_states[]) and returns its index.
+ *
+ * A state is valid if the 'valid' field is enabled and
+ * if it satisfies the enable_off_mode condition.
+ */
+static int next_valid_state(struct cpuidle_device *dev,
+ struct cpuidle_driver *drv, int index)
+{
+ struct omap3_idle_statedata *cx = &omap3_idle_data[index];
+ u32 mpu_deepest_state = PWRDM_POWER_RET;
+ u32 core_deepest_state = PWRDM_POWER_RET;
+ int idx;
+ int next_index = 0; /* C1 is the default value */
+
+ if (enable_off_mode) {
+ mpu_deepest_state = PWRDM_POWER_OFF;
+ /*
+ * Erratum i583: valable for ES rev < Es1.2 on 3630.
+ * CORE OFF mode is not supported in a stable form, restrict
+ * instead the CORE state to RET.
+ */
+ if (!IS_PM34XX_ERRATUM(PM_SDRC_WAKEUP_ERRATUM_i583))
+ core_deepest_state = PWRDM_POWER_OFF;
+ }
+
+ /* Check if current state is valid */
+ if ((cx->mpu_state >= mpu_deepest_state) &&
+ (cx->core_state >= core_deepest_state))
+ return index;
+
+ /*
+ * Drop to next valid state.
+ * Start search from the next (lower) state.
+ */
+ for (idx = index - 1; idx >= 0; idx--) {
+ cx = &omap3_idle_data[idx];
+ if ((cx->mpu_state >= mpu_deepest_state) &&
+ (cx->core_state >= core_deepest_state)) {
+ next_index = idx;
+ break;
+ }
+ }
+
+ return next_index;
+}
+
+/**
+ * omap3_enter_idle_bm - Checks for any bus activity
+ * @dev: cpuidle device
+ * @drv: cpuidle driver
+ * @index: array index of target state to be programmed
+ *
+ * This function checks for any pending activity and then programs
+ * the device to the specified or a safer state.
+ */
+static int omap3_enter_idle_bm(struct cpuidle_device *dev,
+ struct cpuidle_driver *drv,
+ int index)
+{
+ int new_state_idx, ret;
+ u8 per_next_state, per_saved_state;
+ struct omap3_idle_statedata *cx;
+
+ /*
+ * Use only C1 if CAM is active.
+ * CAM does not have wakeup capability in OMAP3.
+ */
+ if (pwrdm_read_pwrst(cam_pd) == PWRDM_POWER_ON)
+ new_state_idx = drv->safe_state_index;
+ else
+ new_state_idx = next_valid_state(dev, drv, index);
+
+ /*
+ * FIXME: we currently manage device-specific idle states
+ * for PER and CORE in combination with CPU-specific
+ * idle states. This is wrong, and device-specific
+ * idle management needs to be separated out into
+ * its own code.
+ */
+
+ /* Program PER state */
+ cx = &omap3_idle_data[new_state_idx];
+
+ per_next_state = pwrdm_read_next_pwrst(per_pd);
+ per_saved_state = per_next_state;
+ if (per_next_state < cx->per_min_state) {
+ per_next_state = cx->per_min_state;
+ pwrdm_set_next_pwrst(per_pd, per_next_state);
+ }
+
+ ret = omap3_enter_idle(dev, drv, new_state_idx);
+
+ /* Restore original PER state if it was modified */
+ if (per_next_state != per_saved_state)
+ pwrdm_set_next_pwrst(per_pd, per_saved_state);
+
+ return ret;
+}
+
+static struct cpuidle_driver omap3_idle_driver = {
+ .name = "omap3_idle",
+ .owner = THIS_MODULE,
+ .states = {
+ {
+ .flags = CPUIDLE_FLAG_RCU_IDLE,
+ .enter = omap3_enter_idle_bm,
+ .exit_latency = 2 + 2,
+ .target_residency = 5,
+ .name = "C1",
+ .desc = "MPU ON + CORE ON",
+ },
+ {
+ .flags = CPUIDLE_FLAG_RCU_IDLE,
+ .enter = omap3_enter_idle_bm,
+ .exit_latency = 10 + 10,
+ .target_residency = 30,
+ .name = "C2",
+ .desc = "MPU ON + CORE ON",
+ },
+ {
+ .flags = CPUIDLE_FLAG_RCU_IDLE,
+ .enter = omap3_enter_idle_bm,
+ .exit_latency = 50 + 50,
+ .target_residency = 300,
+ .name = "C3",
+ .desc = "MPU RET + CORE ON",
+ },
+ {
+ .flags = CPUIDLE_FLAG_RCU_IDLE,
+ .enter = omap3_enter_idle_bm,
+ .exit_latency = 1500 + 1800,
+ .target_residency = 4000,
+ .name = "C4",
+ .desc = "MPU OFF + CORE ON",
+ },
+ {
+ .flags = CPUIDLE_FLAG_RCU_IDLE,
+ .enter = omap3_enter_idle_bm,
+ .exit_latency = 2500 + 7500,
+ .target_residency = 12000,
+ .name = "C5",
+ .desc = "MPU RET + CORE RET",
+ },
+ {
+ .flags = CPUIDLE_FLAG_RCU_IDLE,
+ .enter = omap3_enter_idle_bm,
+ .exit_latency = 3000 + 8500,
+ .target_residency = 15000,
+ .name = "C6",
+ .desc = "MPU OFF + CORE RET",
+ },
+ {
+ .flags = CPUIDLE_FLAG_RCU_IDLE,
+ .enter = omap3_enter_idle_bm,
+ .exit_latency = 10000 + 30000,
+ .target_residency = 30000,
+ .name = "C7",
+ .desc = "MPU OFF + CORE OFF",
+ },
+ },
+ .state_count = ARRAY_SIZE(omap3_idle_data),
+ .safe_state_index = 0,
+};
+
+/*
+ * Numbers based on measurements made in October 2009 for PM optimized kernel
+ * with CPU freq enabled on device Nokia N900. Assumes OPP2 (main idle OPP,
+ * and worst case latencies).
+ */
+static struct cpuidle_driver omap3430_idle_driver = {
+ .name = "omap3430_idle",
+ .owner = THIS_MODULE,
+ .states = {
+ {
+ .flags = CPUIDLE_FLAG_RCU_IDLE,
+ .enter = omap3_enter_idle_bm,
+ .exit_latency = 110 + 162,
+ .target_residency = 5,
+ .name = "C1",
+ .desc = "MPU ON + CORE ON",
+ },
+ {
+ .flags = CPUIDLE_FLAG_RCU_IDLE,
+ .enter = omap3_enter_idle_bm,
+ .exit_latency = 106 + 180,
+ .target_residency = 309,
+ .name = "C2",
+ .desc = "MPU ON + CORE ON",
+ },
+ {
+ .flags = CPUIDLE_FLAG_RCU_IDLE,
+ .enter = omap3_enter_idle_bm,
+ .exit_latency = 107 + 410,
+ .target_residency = 46057,
+ .name = "C3",
+ .desc = "MPU RET + CORE ON",
+ },
+ {
+ .flags = CPUIDLE_FLAG_RCU_IDLE,
+ .enter = omap3_enter_idle_bm,
+ .exit_latency = 121 + 3374,
+ .target_residency = 46057,
+ .name = "C4",
+ .desc = "MPU OFF + CORE ON",
+ },
+ {
+ .flags = CPUIDLE_FLAG_RCU_IDLE,
+ .enter = omap3_enter_idle_bm,
+ .exit_latency = 855 + 1146,
+ .target_residency = 46057,
+ .name = "C5",
+ .desc = "MPU RET + CORE RET",
+ },
+ {
+ .flags = CPUIDLE_FLAG_RCU_IDLE,
+ .enter = omap3_enter_idle_bm,
+ .exit_latency = 7580 + 4134,
+ .target_residency = 484329,
+ .name = "C6",
+ .desc = "MPU OFF + CORE RET",
+ },
+ {
+ .flags = CPUIDLE_FLAG_RCU_IDLE,
+ .enter = omap3_enter_idle_bm,
+ .exit_latency = 7505 + 15274,
+ .target_residency = 484329,
+ .name = "C7",
+ .desc = "MPU OFF + CORE OFF",
+ },
+ },
+ .state_count = ARRAY_SIZE(omap3_idle_data),
+ .safe_state_index = 0,
+};
+
+/* Public functions */
+
+/**
+ * omap3_idle_init - Init routine for OMAP3 idle
+ *
+ * Registers the OMAP3 specific cpuidle driver to the cpuidle
+ * framework with the valid set of states.
+ */
+int __init omap3_idle_init(void)
+{
+ mpu_pd = pwrdm_lookup("mpu_pwrdm");
+ core_pd = pwrdm_lookup("core_pwrdm");
+ per_pd = pwrdm_lookup("per_pwrdm");
+ cam_pd = pwrdm_lookup("cam_pwrdm");
+
+ if (!mpu_pd || !core_pd || !per_pd || !cam_pd)
+ return -ENODEV;
+
+ if (cpu_is_omap3430())
+ return cpuidle_register(&omap3430_idle_driver, NULL);
+ else
+ return cpuidle_register(&omap3_idle_driver, NULL);
+}