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/linux/arch/arm/boot/dts/ti/omap/
H A Domap3-beagle-ab4.dts1 // SPDX-License-Identifier: GPL-2.0-only
2 /dts-v1/;
4 #include "omap3-beagle.dts"
8 compatible = "ti,omap3-beagle-ab4", "ti,omap3-beagle", "ti,omap3430", "ti,omap3";
21 /* Unusable as clockevent because of unreliable oscillator, allow to idle */
23 /delete-property/ti,no-reset-on-init;
24 /delete-property/ti,no-idle;
26 /delete-property/ti,timer-alwon;
30 /* Preferred always-on timer for clocksource */
32 ti,no-reset-on-init;
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H A Dam3517.dtsi1 // SPDX-License-Identifier: GPL-2.0-only
5 * Copyright (C) 2013 Texas Instruments Incorporated - https://www.ti.com/
11 /delete-node/ &aes1_target;
12 /delete-node/ &aes2_target;
23 /* Based on OMAP3630 variants OPP50 and OPP100 */
24 operating-points-v2 = <&cpu0_opp_table>;
26 clock-latency = <300000>; /* From legacy driver */
30 cpu0_opp_table: opp-table {
31 compatible = "operating-points-v2-ti-cpu";
38 opp-50-300000000 {
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H A Domap3-devkit8000-common.dtsi1 // SPDX-License-Identifier: GPL-2.0-only
6 #include <dt-bindings/input/input.h>
16 compatible = "gpio-leds";
18 led-heartbeat {
20 gpios = <&gpio6 26 GPIO_ACTIVE_HIGH>; /* 186 -> LED1 */
21 default-state = "on";
22 linux,default-trigger = "heartbeat";
25 led-mmc {
27 gpios = <&gpio6 3 GPIO_ACTIVE_HIGH>; /* 163 -> LED2 */
28 default-state = "on";
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H A Dam33xx.dtsi1 // SPDX-License-Identifier: GPL-2.0-only
5 * Copyright (C) 2012 Texas Instruments Incorporated - https://www.ti.com/
8 #include <dt-bindings/bus/ti-sysc.h>
9 #include <dt-bindings/gpio/gpio.h>
10 #include <dt-bindings/pinctrl/am33xx.h>
11 #include <dt-bindings/clock/am3.h>
15 interrupt-parent = <&intc>;
16 #address-cells = <1>;
17 #size-cells = <1>;
30 d-can0 = &dcan0;
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/linux/Documentation/devicetree/bindings/arm/omap/
H A Domap.txt5 On top of that an omap_device is created to extend the platform_device
11 to move data from hwmod to device-tree representation.
15 - compatible: Every devices present in OMAP SoC should be in the
17 - ti,hwmods: list of hwmod names (ascii strings), that comes from the OMAP
22 - ti,no_idle_on_suspend: When present, it prevents the PM to idle the module
24 - ti,no-reset-on-init: When present, the module should not be reset at init
25 - ti,no-idle-on-init: When present, the module should not be idled at init
26 - ti,no-idle: When present, the module is never allowed to idle.
31 compatible = "ti,omap4-spinlock";
37 - General Purpose devices
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/linux/Documentation/devicetree/bindings/bus/
H A Dti-sysc.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/bus/ti-sysc.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Tony Lindgren <tony@atomide.com>
22 module clocks, idle modes and interconnect level resets.
31 pattern: "^target-module(@[0-9a-f]+)?$"
35 - items:
36 - enum:
37 - ti,sysc-omap2
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/linux/arch/arm/kernel/
H A Dcpuidle.c1 // SPDX-License-Identifier: GPL-2.0-or-later
18 * arm_cpuidle_simple_enter() - a wrapper to cpu_do_idle()
37 * arm_cpuidle_suspend() - function to enter low power idle states
41 * registered at the init time.
53 * arm_cpuidle_get_ops() - find a registered cpuidle_ops by name
65 for (; m->method; m++) in arm_cpuidle_get_ops()
66 if (!strcmp(m->method, method)) in arm_cpuidle_get_ops()
67 return m->ops; in arm_cpuidle_get_ops()
73 * arm_cpuidle_read_ops() - Initialize the cpuidle ops with the device tree
77 * Get the method name defined in the 'enable-method' property, retrieve the
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/linux/arch/arm/mach-omap1/
H A Dclock_data.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * linux/arch/arm/mach-omap1/clock_data.c
5 * Copyright (C) 2004 - 2005, 2009-2010 Nokia Corporation
7 * Based on clocks.h by Tony Lindgren, Gordon McNutt and RidgeRun, Inc
10 * - Clocks that are only available on some chips should be marked with the
11 * chips that they are present on.
18 #include <linux/clk-provider.h>
21 #include <linux/soc/ti/omap1-io.h>
23 #include <asm/mach-types.h> /* for machine_is_* */
32 /* Some ARM_IDLECT1 bit shifts - used in struct arm_idlect1_clk */
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/linux/drivers/macintosh/
H A Dvia-macii.c1 // SPDX-License-Identifier: GPL-2.0
3 * Device driver for the via ADB on (many) Mac II-class machines
5 * Based on the original ADB keyboard handler Copyright (c) 1997 Alan Cox
13 * 1999-08-02 (jmt) - Initial rewrite for Unified ADB.
14 * 2000-03-29 Tony Mantler <tonym@mac.linux-m68k.org>
15 * - Big overhaul, should actually work now.
16 * 2006-12-31 Finn Thain - Another overhaul.
24 * ftp://ftp.apple.com/developer/Tool_Chest/Devices_-_Hardware/Apple_Desktop_Bus/
32 #include <linux/init.h>
39 /* VIA registers - spaced 0x200 bytes apart */
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/linux/arch/arm/mach-omap2/
H A Domap_hwmod.h1 /* SPDX-License-Identifier: GPL-2.0-only */
5 * Copyright (C) 2009-2011 Nokia Corporation
6 * Copyright (C) 2011-2012 Texas Instruments, Inc.
13 * These headers and macros are used to define OMAP on-chip module
16 * omap_hwmod code, in arch/arm/mach-omap2/omap_hwmod.c (as of this
20 * - add interconnect error log structures
21 * - init_conn_id_bit (CONNID_BIT_VECTOR)
22 * - implement default hwmod SMS/SDRC flags?
23 * - move Linux-specific data ("non-ROM data") out
29 #include <linux/init.h>
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H A Dcm_common.c1 // SPDX-License-Identifier: GPL-2.0-only
12 #include <linux/init.h>
25 * cm_ll_data: function pointers to SoC-specific implementations of
41 * cm_split_idlest_reg - split CM_IDLEST reg addr into its components
48 * via the @prcm_inst and @idlest_reg_id. Returns -EINVAL upon error,
56 if (!cm_ll_data->split_idlest_reg) { in cm_split_idlest_reg()
57 WARN_ONCE(1, "cm: %s: no low-level function defined\n", in cm_split_idlest_reg()
59 return -EINVAL; in cm_split_idlest_reg()
62 ret = cm_ll_data->split_idlest_reg(idlest_reg, prcm_inst, in cm_split_idlest_reg()
64 *prcm_inst -= cm_base.offset; in cm_split_idlest_reg()
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H A Domap_hwmod.c1 // SPDX-License-Identifier: GPL-2.0-only
5 * Copyright (C) 2009-2011 Nokia Corporation
6 * Copyright (C) 2011-2012 Texas Instruments, Inc.
15 * ------------
21 * TI's documentation, on-chip devices are referred to as "OMAP
26 * Most of the address and data flow between modules is via OCP-based
28 * interconnects that distribute the hardware clock tree, handle idle
30 * various pads or balls on the OMAP package.
32 * OMAP hwmod provides a consistent way to describe the on-chip
36 * to reset, enable, idle, and disable these hardware blocks. And
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H A Dvc.c1 // SPDX-License-Identifier: GPL-2.0-only
9 #include <linux/init.h>
19 #include "prm-regbits-34xx.h"
20 #include "prm-regbits-44xx.h"
52 * struct omap_vc_channel_cfg - describe the cfg_channel bitfield
81 * On OMAP3+, all VC channels have the above default bitfield
96 /* Default I2C trace length on pcb, 6.3cm. Used for capacitance calculations. */
101 * omap_vc_config_channel - configure VC channel to PMIC mappings
106 * - i2c slave address (SA)
107 * - voltage configuration address (RAV)
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/linux/drivers/base/
H A Dpinctrl.c1 // SPDX-License-Identifier: GPL-2.0
5 * Copyright (C) 2012 ST-Ericsson SA
6 * Written on behalf of Linaro for ST-Ericsson
7 * Based on bits of regulator core, gpio core and clk core
18 * pinctrl_bind_pins() - called by the device core before probe
25 if (dev->of_node_reused) in pinctrl_bind_pins()
28 dev->pins = devm_kzalloc(dev, sizeof(*(dev->pins)), GFP_KERNEL); in pinctrl_bind_pins()
29 if (!dev->pins) in pinctrl_bind_pins()
30 return -ENOMEM; in pinctrl_bind_pins()
32 dev->pins->p = devm_pinctrl_get(dev); in pinctrl_bind_pins()
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/linux/drivers/cpuidle/
H A Dcoupled.c1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * coupled.c - helper functions to enter the same idle state on multiple cpus
23 * On some ARM SMP SoCs (OMAP4460, Tegra 2, and probably more), the
25 * sequencing restrictions (on Tegra 2, cpu 0 must be the last to
26 * power down), or due to HW bugs (on OMAP4460, a cpu powering up
33 * be tightly controlled on both cpus.
37 * which point the coupled state function will be called on all
40 * Once all cpus are ready to enter idle, they are woken by an smp
42 * cpus will find work to do, and choose not to enter idle. A
47 * cpu exits idle, the other cpus will decrement their counter and
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/linux/arch/arc/kernel/
H A Dsmp.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
6 * -- Added support for Inter Processor Interrupts
9 * -- Initial Write (Borrowed heavily from ARM)
49 return -EINVAL; in arc_get_cpu_map()
52 return -EINVAL; in arc_get_cpu_map()
58 * Read from DeviceTree and setup cpu possible mask. If there is no
59 * "possible-cpus" property in DeviceTree pretend all [0..NR_CPUS-1] exist.
65 if (arc_get_cpu_map("possible-cpus", &cpumask)) { in arc_init_cpu_possible()
66 pr_warn("Failed to get possible-cpus from dtb, pretending all %u cpus exist\n", in arc_init_cpu_possible()
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/linux/arch/m68k/fpsp040/
H A Dgen_except.S4 | gen_except --- FPSP routine to detect reportable exceptions
7 | user_fpcr on the stack with the exception status byte
32 | For details on the license for this file, please see the
58 cmpib #IDLE_SIZE-4,1(%a7) |test for idle frame
59 beq do_check |go handle idle frame
60 cmpib #UNIMP_40_SIZE-4,1(%a7) |test for orig unimp frame
62 cmpib #UNIMP_41_SIZE-4,1(%a7) |test for rev unimp frame
64 cmpib #BUSY_SIZE-4,1(%a7) |if size <> $60, fmt error
66 leal BUSY_SIZE+LOCAL_SIZE(%a7),%a1 |init a1 so fpsp.h
86 | Or in the FPSR from the emulation with the USER_FPSR on the stack.
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/linux/arch/arm/mach-tegra/
H A Dplatsmp.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * linux/arch/arm/mach-tegra/platsmp.c
16 #include <linux/init.h>
26 #include <asm/mach-types.h>
42 static int tegra20_boot_secondary(unsigned int cpu, struct task_struct *idle) in tegra20_boot_secondary() argument
50 * power-gated via the flow controller). This will have no in tegra20_boot_secondary()
51 * effect on first boot of the CPU since it should already be in tegra20_boot_secondary()
58 * power-gate the CPU this will cause the flow controller to in tegra20_boot_secondary()
70 static int tegra30_boot_secondary(unsigned int cpu, struct task_struct *idle) in tegra30_boot_secondary() argument
84 * power will be resumed automatically after un-halting the in tegra30_boot_secondary()
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/linux/Documentation/networking/device_drivers/hamradio/
H A Dz8530drv.rst1 .. SPDX-License-Identifier: GPL-2.0
5 SCC.C - Linux driver for Z8530 based HDLC cards for AX.25
14 1. ftp://ftp.ccac.rwth-aachen.de/pub/jr/z8530drv-utils_3.0-3.tar.gz
16 2. ftp://ftp.pspt.fi/pub/ham/linux/ax25/z8530drv-utils_3.0-3.tar.gz
20 Linux Kernel AX.25 documentation and programs, is available on
41 AX.25-HOWTO on how to emulate a KISS TNC on network device drivers.
54 please read 'man insmod' that comes with module-init-tools.
64 of your rc.*-files. This has to be done BEFORE you can
82 irq 5 # IRQ No. 5
85 escc no # enhanced SCC chip? (8580/85180/85280)
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/linux/drivers/scsi/
H A Daha1542.h1 /* SPDX-License-Identifier: GPL-2.0 */
12 #define INIT BIT(5) /* Mailbox Initialization Required */ macro
13 #define IDLE BIT(4) /* SCSI Host Adapter Idle */ macro
18 #define STATMASK (STST | DIAGF | INIT | IDLE | CDF | DF | INVDCMD)
37 #define CMD_NOP 0x00 /* No Operation */
42 #define CMD_BUSON_TIME 0x07 /* Set Bus-On Time */
43 #define CMD_BUSOFF_TIME 0x08 /* Set Bus-Off Time */
59 /* This is used with scatter-gather */
88 /* Bits 7-5: op=0, 2: Target ID, op=1: Initiator ID */
91 /* Bits 2-0: Logical Unit Number */
/linux/arch/powerpc/kernel/
H A Didle_6xx.S1 /* SPDX-License-Identifier: GPL-2.0-or-later */
9 * be done to check a runtime var (a bit like powersave-nap)
18 #include <asm/asm-offsets.h>
19 #include <asm/feature-fixups.h>
24 * Init idle, called at early CPU setup time from head.S for each CPU
25 * Make sure no rest of NAP mode remains in HID0, save default
55 * depending on the various features.
66 * can be cleared by CPU init after the fixups are done
84 /* Some pre-nap cleanups needed on some CPUs */
88 /* Disable L2 prefetch on some 745x and try to ensure
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/linux/arch/x86/kernel/
H A Dprocess.c1 // SPDX-License-Identifier: GPL-2.0
12 #include <linux/sched/idle.h>
16 #include <linux/init.h>
21 #include <linux/user-return-notifier.h>
27 #include <linux/elf-randomize.h>
31 #include <linux/entry-common.h>
48 #include <asm/spec-ctrl.h>
61 * per-CPU TSS segments. Threads are completely 'soft' on Linux,
62 * no more per-task TSS's. The TSS size is kept cacheline-aligned
64 * section. Since TSS's are completely CPU-local, we want them
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/linux/drivers/cpuidle/governors/
H A Dmenu.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * menu.c - the menu idle governor
5 * Copyright (C) 2006-2007 Adam Belay <abelay@novell.com>
39 * -----------------------
41 * the C state is required to actually break even on this cost. CPUIDLE
43 * need is a good prediction of how long we'll be idle. Like the traditional
49 * that is based on historic behavior. For example, if in the past the actual
55 * ratio is dependent on the order of magnitude of the expected duration; if we
56 * expect 500 milliseconds of idle time the likelihood of getting an interrupt
57 * very early is much higher than if we expect 50 micro seconds of idle time.
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/linux/Documentation/devicetree/bindings/gpio/
H A Dti,omap-gpio.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/gpio/ti,omap-gpio.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Grygorii Strashko <grygorii.strashko@ti.com>
13 The general-purpose interface combines general-purpose input/output (GPIO) banks.
14 Each GPIO banks provides up to 32 dedicated general-purpose pins with input
15 and output capabilities; interrupt generation in active mode and wake-up
16 request generation in idle mode upon the detection of external events.
21 - enum:
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/linux/Documentation/RCU/Design/Memory-Ordering/
H A DTree-RCU-Memory-Ordering.rst2 A Tour Through TREE_RCU's Grace-Period Memory Ordering
13 grace-period memory ordering guarantee is provided.
18 RCU grace periods provide extremely strong memory-ordering guarantees
19 for non-idle non-offline code.
22 period that are within RCU read-side critical sections.
25 of that grace period that are within RCU read-side critical sections.
27 Note well that RCU-sched read-side critical sections include any region
30 an extremely small region of preemption-disabled code, one can think of
31 ``synchronize_rcu()`` as ``smp_mb()`` on steroids.
37 a linked RCU-protected data structure, and phase two frees that element.
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