diff options
Diffstat (limited to 'Documentation')
20 files changed, 551 insertions, 132 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-event_source-devices-events b/Documentation/ABI/testing/sysfs-bus-event_source-devices-events new file mode 100644 index 000000000000..0adeb524c0d4 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-bus-event_source-devices-events @@ -0,0 +1,62 @@ +What: /sys/devices/cpu/events/ + /sys/devices/cpu/events/branch-misses + /sys/devices/cpu/events/cache-references + /sys/devices/cpu/events/cache-misses + /sys/devices/cpu/events/stalled-cycles-frontend + /sys/devices/cpu/events/branch-instructions + /sys/devices/cpu/events/stalled-cycles-backend + /sys/devices/cpu/events/instructions + /sys/devices/cpu/events/cpu-cycles + +Date: 2013/01/08 + +Contact: Linux kernel mailing list <linux-kernel@vger.kernel.org> + +Description: Generic performance monitoring events + + A collection of performance monitoring events that may be + supported by many/most CPUs. These events can be monitored + using the 'perf(1)' tool. + + The contents of each file would look like: + + event=0xNNNN + + where 'N' is a hex digit and the number '0xNNNN' shows the + "raw code" for the perf event identified by the file's + "basename". + + +What: /sys/devices/cpu/events/PM_LD_MISS_L1 + /sys/devices/cpu/events/PM_LD_REF_L1 + /sys/devices/cpu/events/PM_CYC + /sys/devices/cpu/events/PM_BRU_FIN + /sys/devices/cpu/events/PM_GCT_NOSLOT_CYC + /sys/devices/cpu/events/PM_BRU_MPRED + /sys/devices/cpu/events/PM_INST_CMPL + /sys/devices/cpu/events/PM_CMPLU_STALL + +Date: 2013/01/08 + +Contact: Linux kernel mailing list <linux-kernel@vger.kernel.org> + Linux Powerpc mailing list <linuxppc-dev@ozlabs.org> + +Description: POWER-systems specific performance monitoring events + + A collection of performance monitoring events that may be + supported by the POWER CPU. These events can be monitored + using the 'perf(1)' tool. + + These events may not be supported by other CPUs. + + The contents of each file would look like: + + event=0xNNNN + + where 'N' is a hex digit and the number '0xNNNN' shows the + "raw code" for the perf event identified by the file's + "basename". + + Further, multiple terms like 'event=0xNNNN' can be specified + and separated with comma. All available terms are defined in + the /sys/bus/event_source/devices/<dev>/format file. diff --git a/Documentation/ABI/testing/sysfs-platform-ts5500 b/Documentation/ABI/testing/sysfs-platform-ts5500 new file mode 100644 index 000000000000..c88375a537a1 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-platform-ts5500 @@ -0,0 +1,47 @@ +What: /sys/devices/platform/ts5500/adc +Date: January 2013 +KernelVersion: 3.7 +Contact: "Savoir-faire Linux Inc." <kernel@savoirfairelinux.com> +Description: + Indicates the presence of an A/D Converter. If it is present, + it will display "1", otherwise "0". + +What: /sys/devices/platform/ts5500/ereset +Date: January 2013 +KernelVersion: 3.7 +Contact: "Savoir-faire Linux Inc." <kernel@savoirfairelinux.com> +Description: + Indicates the presence of an external reset. If it is present, + it will display "1", otherwise "0". + +What: /sys/devices/platform/ts5500/id +Date: January 2013 +KernelVersion: 3.7 +Contact: "Savoir-faire Linux Inc." <kernel@savoirfairelinux.com> +Description: + Product ID of the TS board. TS-5500 ID is 0x60. + +What: /sys/devices/platform/ts5500/jumpers +Date: January 2013 +KernelVersion: 3.7 +Contact: "Savoir-faire Linux Inc." <kernel@savoirfairelinux.com> +Description: + Bitfield showing the jumpers' state. If a jumper is present, + the corresponding bit is set. For instance, 0x0e means jumpers + 2, 3 and 4 are set. + +What: /sys/devices/platform/ts5500/rs485 +Date: January 2013 +KernelVersion: 3.7 +Contact: "Savoir-faire Linux Inc." <kernel@savoirfairelinux.com> +Description: + Indicates the presence of the RS485 option. If it is present, + it will display "1", otherwise "0". + +What: /sys/devices/platform/ts5500/sram +Date: January 2013 +KernelVersion: 3.7 +Contact: "Savoir-faire Linux Inc." <kernel@savoirfairelinux.com> +Description: + Indicates the presence of the SRAM option. If it is present, + it will display "1", otherwise "0". diff --git a/Documentation/PCI/MSI-HOWTO.txt b/Documentation/PCI/MSI-HOWTO.txt index 53e6fca146d7..a09178086c30 100644 --- a/Documentation/PCI/MSI-HOWTO.txt +++ b/Documentation/PCI/MSI-HOWTO.txt @@ -127,15 +127,42 @@ on the number of vectors that can be allocated; pci_enable_msi_block() returns as soon as it finds any constraint that doesn't allow the call to succeed. -4.2.3 pci_disable_msi +4.2.3 pci_enable_msi_block_auto + +int pci_enable_msi_block_auto(struct pci_dev *dev, unsigned int *count) + +This variation on pci_enable_msi() call allows a device driver to request +the maximum possible number of MSIs. The MSI specification only allows +interrupts to be allocated in powers of two, up to a maximum of 2^5 (32). + +If this function returns a positive number, it indicates that it has +succeeded and the returned value is the number of allocated interrupts. In +this case, the function enables MSI on this device and updates dev->irq to +be the lowest of the new interrupts assigned to it. The other interrupts +assigned to the device are in the range dev->irq to dev->irq + returned +value - 1. + +If this function returns a negative number, it indicates an error and +the driver should not attempt to request any more MSI interrupts for +this device. + +If the device driver needs to know the number of interrupts the device +supports it can pass the pointer count where that number is stored. The +device driver must decide what action to take if pci_enable_msi_block_auto() +succeeds, but returns a value less than the number of interrupts supported. +If the device driver does not need to know the number of interrupts +supported, it can set the pointer count to NULL. + +4.2.4 pci_disable_msi void pci_disable_msi(struct pci_dev *dev) This function should be used to undo the effect of pci_enable_msi() or -pci_enable_msi_block(). Calling it restores dev->irq to the pin-based -interrupt number and frees the previously allocated message signaled -interrupt(s). The interrupt may subsequently be assigned to another -device, so drivers should not cache the value of dev->irq. +pci_enable_msi_block() or pci_enable_msi_block_auto(). Calling it restores +dev->irq to the pin-based interrupt number and frees the previously +allocated message signaled interrupt(s). The interrupt may subsequently be +assigned to another device, so drivers should not cache the value of +dev->irq. Before calling this function, a device driver must always call free_irq() on any interrupt for which it previously called request_irq(). diff --git a/Documentation/atomic_ops.txt b/Documentation/atomic_ops.txt index 27f2b21a9d5c..d9ca5be9b471 100644 --- a/Documentation/atomic_ops.txt +++ b/Documentation/atomic_ops.txt @@ -253,6 +253,8 @@ This performs an atomic exchange operation on the atomic variable v, setting the given new value. It returns the old value that the atomic variable v had just before the operation. +atomic_xchg requires explicit memory barriers around the operation. + int atomic_cmpxchg(atomic_t *v, int old, int new); This performs an atomic compare exchange operation on the atomic value v, diff --git a/Documentation/cgroups/00-INDEX b/Documentation/cgroups/00-INDEX index f78b90a35ad0..f5635a09c3f6 100644 --- a/Documentation/cgroups/00-INDEX +++ b/Documentation/cgroups/00-INDEX @@ -4,8 +4,6 @@ blkio-controller.txt - Description for Block IO Controller, implementation and usage details. cgroups.txt - Control Groups definition, implementation details, examples and API. -cgroup_event_listener.c - - A user program for cgroup listener. cpuacct.txt - CPU Accounting Controller; account CPU usage for groups of tasks. cpusets.txt diff --git a/Documentation/cgroups/cgroup_event_listener.c b/Documentation/cgroups/cgroup_event_listener.c deleted file mode 100644 index 3e082f96dc12..000000000000 --- a/Documentation/cgroups/cgroup_event_listener.c +++ /dev/null @@ -1,110 +0,0 @@ -/* - * cgroup_event_listener.c - Simple listener of cgroup events - * - * Copyright (C) Kirill A. Shutemov <kirill@shutemov.name> - */ - -#include <assert.h> -#include <errno.h> -#include <fcntl.h> -#include <libgen.h> -#include <limits.h> -#include <stdio.h> -#include <string.h> -#include <unistd.h> - -#include <sys/eventfd.h> - -#define USAGE_STR "Usage: cgroup_event_listener <path-to-control-file> <args>\n" - -int main(int argc, char **argv) -{ - int efd = -1; - int cfd = -1; - int event_control = -1; - char event_control_path[PATH_MAX]; - char line[LINE_MAX]; - int ret; - - if (argc != 3) { - fputs(USAGE_STR, stderr); - return 1; - } - - cfd = open(argv[1], O_RDONLY); - if (cfd == -1) { - fprintf(stderr, "Cannot open %s: %s\n", argv[1], - strerror(errno)); - goto out; - } - - ret = snprintf(event_control_path, PATH_MAX, "%s/cgroup.event_control", - dirname(argv[1])); - if (ret >= PATH_MAX) { - fputs("Path to cgroup.event_control is too long\n", stderr); - goto out; - } - - event_control = open(event_control_path, O_WRONLY); - if (event_control == -1) { - fprintf(stderr, "Cannot open %s: %s\n", event_control_path, - strerror(errno)); - goto out; - } - - efd = eventfd(0, 0); - if (efd == -1) { - perror("eventfd() failed"); - goto out; - } - - ret = snprintf(line, LINE_MAX, "%d %d %s", efd, cfd, argv[2]); - if (ret >= LINE_MAX) { - fputs("Arguments string is too long\n", stderr); - goto out; - } - - ret = write(event_control, line, strlen(line) + 1); - if (ret == -1) { - perror("Cannot write to cgroup.event_control"); - goto out; - } - - while (1) { - uint64_t result; - - ret = read(efd, &result, sizeof(result)); - if (ret == -1) { - if (errno == EINTR) - continue; - perror("Cannot read from eventfd"); - break; - } - assert(ret == sizeof(result)); - - ret = access(event_control_path, W_OK); - if ((ret == -1) && (errno == ENOENT)) { - puts("The cgroup seems to have removed."); - ret = 0; - break; - } - - if (ret == -1) { - perror("cgroup.event_control " - "is not accessible any more"); - break; - } - - printf("%s %s: crossed\n", argv[1], argv[2]); - } - -out: - if (efd >= 0) - close(efd); - if (event_control >= 0) - close(event_control); - if (cfd >= 0) - close(cfd); - - return (ret != 0); -} diff --git a/Documentation/cgroups/memcg_test.txt b/Documentation/cgroups/memcg_test.txt index fc8fa97a09ac..ce94a83a7d9a 100644 --- a/Documentation/cgroups/memcg_test.txt +++ b/Documentation/cgroups/memcg_test.txt @@ -399,8 +399,7 @@ Under below explanation, we assume CONFIG_MEM_RES_CTRL_SWAP=y. 9.10 Memory thresholds Memory controller implements memory thresholds using cgroups notification - API. You can use Documentation/cgroups/cgroup_event_listener.c to test - it. + API. You can use tools/cgroup/cgroup_event_listener.c to test it. (Shell-A) Create cgroup and run event listener # mkdir /cgroup/A diff --git a/Documentation/device-mapper/dm-raid.txt b/Documentation/device-mapper/dm-raid.txt index 728c38c242d6..56fb62b09fc5 100644 --- a/Documentation/device-mapper/dm-raid.txt +++ b/Documentation/device-mapper/dm-raid.txt @@ -141,3 +141,4 @@ Version History 1.2.0 Handle creation of arrays that contain failed devices. 1.3.0 Added support for RAID 10 1.3.1 Allow device replacement/rebuild for RAID 10 +1.3.2 Fix/improve redundancy checking for RAID10 diff --git a/Documentation/devicetree/bindings/mfd/tps6507x.txt b/Documentation/devicetree/bindings/mfd/tps6507x.txt new file mode 100755 index 000000000000..8fffa3c5ed40 --- /dev/null +++ b/Documentation/devicetree/bindings/mfd/tps6507x.txt @@ -0,0 +1,91 @@ +TPS6507x Power Management Integrated Circuit + +Required properties: +- compatible: "ti,tps6507x" +- reg: I2C slave address +- regulators: This is the list of child nodes that specify the regulator + initialization data for defined regulators. Not all regulators for the + given device need to be present. The definition for each of these nodes + is defined using the standard binding for regulators found at + Documentation/devicetree/bindings/regulator/regulator.txt. + The regulator is matched with the regulator-compatible. + + The valid regulator-compatible values are: + tps6507x: vdcdc1, vdcdc2, vdcdc3, vldo1, vldo2 +- xxx-supply: Input voltage supply regulator. + These entries are required if regulators are enabled for a device. + Missing of these properties can cause the regulator registration + fails. + If some of input supply is powered through battery or always-on + supply then also it is require to have these parameters with proper + node handle of always on power supply. + tps6507x: + vindcdc1_2-supply: VDCDC1 and VDCDC2 input. + vindcdc3-supply : VDCDC3 input. + vldo1_2-supply : VLDO1 and VLDO2 input. + +Regulator Optional properties: +- defdcdc_default: It's property of DCDC2 and DCDC3 regulators. + 0: If defdcdc pin of DCDC2/DCDC3 is pulled to GND. + 1: If defdcdc pin of DCDC2/DCDC3 is driven HIGH. + If this property is not defined, it defaults to 0 (not enabled). + +Example: + + pmu: tps6507x@48 { + compatible = "ti,tps6507x"; + reg = <0x48>; + + vindcdc1_2-supply = <&vbat>; + vindcdc3-supply = <...>; + vinldo1_2-supply = <...>; + + regulators { + #address-cells = <1>; + #size-cells = <0>; + + vdcdc1_reg: regulator@0 { + regulator-compatible = "VDCDC1"; + reg = <0>; + regulator-min-microvolt = <3150000>; + regulator-max-microvolt = <3450000>; + regulator-always-on; + regulator-boot-on; + }; + vdcdc2_reg: regulator@1 { + regulator-compatible = "VDCDC2"; + reg = <1>; + regulator-min-microvolt = <1710000>; + regulator-max-microvolt = <3450000>; + regulator-always-on; + regulator-boot-on; + defdcdc_default = <1>; + }; + vdcdc3_reg: regulator@2 { + regulator-compatible = "VDCDC3"; + reg = <2>; + regulator-min-microvolt = <950000> + regulator-max-microvolt = <1350000>; + regulator-always-on; + regulator-boot-on; + defdcdc_default = <1>; + }; + ldo1_reg: regulator@3 { + regulator-compatible = "LDO1"; + reg = <3>; + regulator-min-microvolt = <1710000>; + regulator-max-microvolt = <1890000>; + regulator-always-on; + regulator-boot-on; + }; + ldo2_reg: regulator@4 { + regulator-compatible = "LDO2"; + reg = <4>; + regulator-min-microvolt = <1140000>; + regulator-max-microvolt = <1320000>; + regulator-always-on; + regulator-boot-on; + }; + }; + + }; diff --git a/Documentation/devicetree/bindings/pinctrl/atmel,at91-pinctrl.txt b/Documentation/devicetree/bindings/pinctrl/atmel,at91-pinctrl.txt index 3a268127b054..bc50899e0c81 100644 --- a/Documentation/devicetree/bindings/pinctrl/atmel,at91-pinctrl.txt +++ b/Documentation/devicetree/bindings/pinctrl/atmel,at91-pinctrl.txt @@ -81,7 +81,8 @@ PA31 TXD4 Required properties for pin configuration node: - atmel,pins: 4 integers array, represents a group of pins mux and config setting. The format is atmel,pins = <PIN_BANK PIN_BANK_NUM PERIPH CONFIG>. - The PERIPH 0 means gpio. + The PERIPH 0 means gpio, PERIPH 1 is periph A, PERIPH 2 is periph B... + PIN_BANK 0 is pioA, PIN_BANK 1 is pioB... Bits used for CONFIG: PULL_UP (1 << 0): indicate this pin need a pull up. @@ -126,7 +127,7 @@ pinctrl@fffff400 { pinctrl_dbgu: dbgu-0 { atmel,pins = <1 14 0x1 0x0 /* PB14 periph A */ - 1 15 0x1 0x1>; /* PB15 periph with pullup */ + 1 15 0x1 0x1>; /* PB15 periph A with pullup */ }; }; }; diff --git a/Documentation/devicetree/bindings/regulator/anatop-regulator.txt b/Documentation/devicetree/bindings/regulator/anatop-regulator.txt index 357758cb6e92..758eae24082a 100644 --- a/Documentation/devicetree/bindings/regulator/anatop-regulator.txt +++ b/Documentation/devicetree/bindings/regulator/anatop-regulator.txt @@ -9,6 +9,11 @@ Required properties: - anatop-min-voltage: Minimum voltage of this regulator - anatop-max-voltage: Maximum voltage of this regulator +Optional properties: +- anatop-delay-reg-offset: Anatop MFD step time register offset +- anatop-delay-bit-shift: Bit shift for the step time register +- anatop-delay-bit-width: Number of bits used in the step time register + Any property defined as part of the core regulator binding, defined in regulator.txt, can also be used. @@ -23,6 +28,9 @@ Example: anatop-reg-offset = <0x140>; anatop-vol-bit-shift = <9>; anatop-vol-bit-width = <5>; + anatop-delay-reg-offset = <0x170>; + anatop-delay-bit-shift = <24>; + anatop-delay-bit-width = <2>; anatop-min-bit-val = <1>; anatop-min-voltage = <725000>; anatop-max-voltage = <1300000>; diff --git a/Documentation/devicetree/bindings/regulator/s5m8767-regulator.txt b/Documentation/devicetree/bindings/regulator/s5m8767-regulator.txt new file mode 100644 index 000000000000..a35ff99003a5 --- /dev/null +++ b/Documentation/devicetree/bindings/regulator/s5m8767-regulator.txt @@ -0,0 +1,152 @@ +* Samsung S5M8767 Voltage and Current Regulator + +The Samsung S5M8767 is a multi-function device which includes volatage and +current regulators, rtc, charger controller and other sub-blocks. It is +interfaced to the host controller using a i2c interface. Each sub-block is +addressed by the host system using different i2c slave address. This document +describes the bindings for 'pmic' sub-block of s5m8767. + +Required properties: +- compatible: Should be "samsung,s5m8767-pmic". +- reg: Specifies the i2c slave address of the pmic block. It should be 0x66. + +- s5m8767,pmic-buck2-dvs-voltage: A set of 8 voltage values in micro-volt (uV) + units for buck2 when changing voltage using gpio dvs. Refer to [1] below + for additional information. + +- s5m8767,pmic-buck3-dvs-voltage: A set of 8 voltage values in micro-volt (uV) + units for buck3 when changing voltage using gpio dvs. Refer to [1] below + for additional information. + +- s5m8767,pmic-buck4-dvs-voltage: A set of 8 voltage values in micro-volt (uV) + units for buck4 when changing voltage using gpio dvs. Refer to [1] below + for additional information. + +- s5m8767,pmic-buck-ds-gpios: GPIO specifiers for three host gpio's used + for selecting GPIO DVS lines. It is one-to-one mapped to dvs gpio lines. + +[1] If none of the 's5m8767,pmic-buck[2/3/4]-uses-gpio-dvs' optional + property is specified, the 's5m8767,pmic-buck[2/3/4]-dvs-voltage' + property should specify atleast one voltage level (which would be a + safe operating voltage). + + If either of the 's5m8767,pmic-buck[2/3/4]-uses-gpio-dvs' optional + property is specified, then all the eight voltage values for the + 's5m8767,pmic-buck[2/3/4]-dvs-voltage' should be specified. + +Optional properties: +- interrupt-parent: Specifies the phandle of the interrupt controller to which + the interrupts from s5m8767 are delivered to. +- interrupts: Interrupt specifiers for two interrupt sources. + - First interrupt specifier is for 'irq1' interrupt. + - Second interrupt specifier is for 'alert' interrupt. +- s5m8767,pmic-buck2-uses-gpio-dvs: 'buck2' can be controlled by gpio dvs. +- s5m8767,pmic-buck3-uses-gpio-dvs: 'buck3' can be controlled by gpio dvs. +- s5m8767,pmic-buck4-uses-gpio-dvs: 'buck4' can be controlled by gpio dvs. + +Additional properties required if either of the optional properties are used: + +- s5m8767,pmic-buck234-default-dvs-idx: Default voltage setting selected from + the possible 8 options selectable by the dvs gpios. The value of this + property should be between 0 and 7. If not specified or if out of range, the + default value of this property is set to 0. + +- s5m8767,pmic-buck-dvs-gpios: GPIO specifiers for three host gpio's used + for dvs. The format of the gpio specifier depends in the gpio controller. + +Regulators: The regulators of s5m8767 that have to be instantiated should be +included in a sub-node named 'regulators'. Regulator nodes included in this +sub-node should be of the format as listed below. + + regulator_name { + ldo1_reg: LDO1 { + regulator-name = "VDD_ALIVE_1.0V"; + regulator-min-microvolt = <1100000>; + regulator-max-microvolt = <1100000>; + regulator-always-on; + regulator-boot-on; + op_mode = <1>; /* Normal Mode */ + }; + }; +The above regulator entries are defined in regulator bindings documentation +except op_mode description. + - op_mode: describes the different operating modes of the LDO's with + power mode change in SOC. The different possible values are, + 0 - always off mode + 1 - on in normal mode + 2 - low power mode + 3 - suspend mode + +The following are the names of the regulators that the s5m8767 pmic block +supports. Note: The 'n' in LDOn and BUCKn represents the LDO or BUCK number +as per the datasheet of s5m8767. + + - LDOn + - valid values for n are 1 to 28 + - Example: LDO0, LD01, LDO28 + - BUCKn + - valid values for n are 1 to 9. + - Example: BUCK1, BUCK2, BUCK9 + +The bindings inside the regulator nodes use the standard regulator bindings +which are documented elsewhere. + +Example: + + s5m8767_pmic@66 { + compatible = "samsung,s5m8767-pmic"; + reg = <0x66>; + + s5m8767,pmic-buck2-uses-gpio-dvs; + s5m8767,pmic-buck3-uses-gpio-dvs; + s5m8767,pmic-buck4-uses-gpio-dvs; + + s5m8767,pmic-buck-default-dvs-idx = <0>; + + s5m8767,pmic-buck-dvs-gpios = <&gpx0 0 1 0 0>, /* DVS1 */ + <&gpx0 1 1 0 0>, /* DVS2 */ + <&gpx0 2 1 0 0>; /* DVS3 */ + + s5m8767,pmic-buck-ds-gpios = <&gpx2 3 1 0 0>, /* SET1 */ + <&gpx2 4 1 0 0>, /* SET2 */ + <&gpx2 5 1 0 0>; /* SET3 */ + + s5m8767,pmic-buck2-dvs-voltage = <1350000>, <1300000>, + <1250000>, <1200000>, + <1150000>, <1100000>, + <1000000>, <950000>; + + s5m8767,pmic-buck3-dvs-voltage = <1100000>, <1100000>, + <1100000>, <1100000>, + <1000000>, <1000000>, + <1000000>, <1000000>; + + s5m8767,pmic-buck4-dvs-voltage = <1200000>, <1200000>, + <1200000>, <1200000>, + <1200000>, <1200000>, + <1200000>, <1200000>; + + regulators { + ldo1_reg: LDO1 { + regulator-name = "VDD_ABB_3.3V"; + regulator-min-microvolt = <3300000>; + regulator-max-microvolt = <3300000>; + op_mode = <1>; /* Normal Mode */ + }; + + ldo2_reg: LDO2 { + regulator-name = "VDD_ALIVE_1.1V"; + regulator-min-microvolt = <1100000>; + regulator-max-microvolt = <1100000>; + regulator-always-on; + }; + + buck1_reg: BUCK1 { + regulator-name = "VDD_MIF_1.2V"; + regulator-min-microvolt = <950000>; + regulator-max-microvolt = <1350000>; + regulator-always-on; + regulator-boot-on; + }; + }; + }; diff --git a/Documentation/devicetree/bindings/regulator/tps51632-regulator.txt b/Documentation/devicetree/bindings/regulator/tps51632-regulator.txt new file mode 100644 index 000000000000..2f7e44a96414 --- /dev/null +++ b/Documentation/devicetree/bindings/regulator/tps51632-regulator.txt @@ -0,0 +1,27 @@ +TPS51632 Voltage regulators + +Required properties: +- compatible: Must be "ti,tps51632" +- reg: I2C slave address + +Optional properties: +- ti,enable-pwm-dvfs: Enable the DVFS voltage control through the PWM interface. +- ti,dvfs-step-20mV: The 20mV step voltage when PWM DVFS enabled. Missing this + will set 10mV step voltage in PWM DVFS mode. In normal mode, the voltage + step is 10mV as per datasheet. + +Any property defined as part of the core regulator binding, defined in +regulator.txt, can also be used. + +Example: + + tps51632 { + compatible = "ti,tps51632"; + reg = <0x43>; + regulator-name = "tps51632-vout"; + regulator-min-microvolt = <500000>; + regulator-max-microvolt = <1500000>; + regulator-boot-on; + ti,enable-pwm-dvfs; + ti,dvfs-step-20mV; + }; diff --git a/Documentation/filesystems/f2fs.txt b/Documentation/filesystems/f2fs.txt index 8fbd8b46ee34..dcf338e62b71 100644 --- a/Documentation/filesystems/f2fs.txt +++ b/Documentation/filesystems/f2fs.txt @@ -175,9 +175,9 @@ consists of multiple segments as described below. align with the zone size <-| |-> align with the segment size _________________________________________________________________________ - | | | Node | Segment | Segment | | - | Superblock | Checkpoint | Address | Info. | Summary | Main | - | (SB) | (CP) | Table (NAT) | Table (SIT) | Area (SSA) | | + | | | Segment | Node | Segment | | + | Superblock | Checkpoint | Info. | Address | Summary | Main | + | (SB) | (CP) | Table (SIT) | Table (NAT) | Area (SSA) | | |____________|_____2______|______N______|______N______|______N_____|__N___| . . . . @@ -200,14 +200,14 @@ consists of multiple segments as described below. : It contains file system information, bitmaps for valid NAT/SIT sets, orphan inode lists, and summary entries of current active segments. -- Node Address Table (NAT) - : It is composed of a block address table for all the node blocks stored in - Main area. - - Segment Information Table (SIT) : It contains segment information such as valid block count and bitmap for the validity of all the blocks. +- Node Address Table (NAT) + : It is composed of a block address table for all the node blocks stored in + Main area. + - Segment Summary Area (SSA) : It contains summary entries which contains the owner information of all the data and node blocks stored in Main area. @@ -236,13 +236,13 @@ For file system consistency, each CP points to which NAT and SIT copies are valid, as shown as below. +--------+----------+---------+ - | CP | NAT | SIT | + | CP | SIT | NAT | +--------+----------+---------+ . . . . . . . . . . . . +-------+-------+--------+--------+--------+--------+ - | CP #0 | CP #1 | NAT #0 | NAT #1 | SIT #0 | SIT #1 | + | CP #0 | CP #1 | SIT #0 | SIT #1 | NAT #0 | NAT #1 | +-------+-------+--------+--------+--------+--------+ | ^ ^ | | | diff --git a/Documentation/hid/hid-sensor.txt b/Documentation/hid/hid-sensor.txt index 948b0989c433..948b0989c433 100755..100644 --- a/Documentation/hid/hid-sensor.txt +++ b/Documentation/hid/hid-sensor.txt diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 363e348bff9b..6c723811c0a0 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -2438,7 +2438,7 @@ bytes respectively. Such letter suffixes can also be entirely omitted. real-time workloads. It can also improve energy efficiency for asymmetric multiprocessors. - rcu_nocbs_poll [KNL,BOOT] + rcu_nocb_poll [KNL,BOOT] Rather than requiring that offloaded CPUs (specified by rcu_nocbs= above) explicitly awaken the corresponding "rcuoN" kthreads, diff --git a/Documentation/memory-barriers.txt b/Documentation/memory-barriers.txt index 3c4e1b3b80a1..fa5d8a9ae205 100644 --- a/Documentation/memory-barriers.txt +++ b/Documentation/memory-barriers.txt @@ -1685,6 +1685,7 @@ explicit lock operations, described later). These include: xchg(); cmpxchg(); + atomic_xchg(); atomic_cmpxchg(); atomic_inc_return(); atomic_dec_return(); diff --git a/Documentation/trace/ftrace.txt b/Documentation/trace/ftrace.txt index 6f51fed45f2d..53d6a3c51d87 100644 --- a/Documentation/trace/ftrace.txt +++ b/Documentation/trace/ftrace.txt @@ -1842,6 +1842,89 @@ an error. # cat buffer_size_kb 85 +Snapshot +-------- +CONFIG_TRACER_SNAPSHOT makes a generic snapshot feature +available to all non latency tracers. (Latency tracers which +record max latency, such as "irqsoff" or "wakeup", can't use +this feature, since those are already using the snapshot +mechanism internally.) + +Snapshot preserves a current trace buffer at a particular point +in time without stopping tracing. Ftrace swaps the current +buffer with a spare buffer, and tracing continues in the new +current (=previous spare) buffer. + +The following debugfs files in "tracing" are related to this +feature: + + snapshot: + + This is used to take a snapshot and to read the output + of the snapshot. Echo 1 into this file to allocate a + spare buffer and to take a snapshot (swap), then read + the snapshot from this file in the same format as + "trace" (described above in the section "The File + System"). Both reads snapshot and tracing are executable + in parallel. When the spare buffer is allocated, echoing + 0 frees it, and echoing else (positive) values clear the + snapshot contents. + More details are shown in the table below. + + status\input | 0 | 1 | else | + --------------+------------+------------+------------+ + not allocated |(do nothing)| alloc+swap | EINVAL | + --------------+------------+------------+------------+ + allocated | free | swap | clear | + --------------+------------+------------+------------+ + +Here is an example of using the snapshot feature. + + # echo 1 > events/sched/enable + # echo 1 > snapshot + # cat snapshot +# tracer: nop +# +# entries-in-buffer/entries-written: 71/71 #P:8 +# +# _-----=> irqs-off +# / _----=> need-resched +# | / _---=> hardirq/softirq +# || / _--=> preempt-depth +# ||| / delay +# TASK-PID CPU# |||| TIMESTAMP FUNCTION +# | | | |||| | | + <idle>-0 [005] d... 2440.603828: sched_switch: prev_comm=swapper/5 prev_pid=0 prev_prio=120 prev_state=R ==> next_comm=snapshot-test-2 next_pid=2242 next_prio=120 + sleep-2242 [005] d... 2440.603846: sched_switch: prev_comm=snapshot-test-2 prev_pid=2242 prev_prio=120 prev_state=R ==> next_comm=kworker/5:1 next_pid=60 next_prio=120 +[...] + <idle>-0 [002] d... 2440.707230: sched_switch: prev_comm=swapper/2 prev_pid=0 prev_prio=120 prev_state=R ==> next_comm=snapshot-test-2 next_pid=2229 next_prio=120 + + # cat trace +# tracer: nop +# +# entries-in-buffer/entries-written: 77/77 #P:8 +# +# _-----=> irqs-off +# / _----=> need-resched +# | / _---=> hardirq/softirq +# || / _--=> preempt-depth +# ||| / delay +# TASK-PID CPU# |||| TIMESTAMP FUNCTION +# | | | |||| | | + <idle>-0 [007] d... 2440.707395: sched_switch: prev_comm=swapper/7 prev_pid=0 prev_prio=120 prev_state=R ==> next_comm=snapshot-test-2 next_pid=2243 next_prio=120 + snapshot-test-2-2229 [002] d... 2440.707438: sched_switch: prev_comm=snapshot-test-2 prev_pid=2229 prev_prio=120 prev_state=S ==> next_comm=swapper/2 next_pid=0 next_prio=120 +[...] + + +If you try to use this snapshot feature when current tracer is +one of the latency tracers, you will get the following results. + + # echo wakeup > current_tracer + # echo 1 > snapshot +bash: echo: write error: Device or resource busy + # cat snapshot +cat: snapshot: Device or resource busy + ----------- More details can be found in the source code, in the diff --git a/Documentation/x86/boot.txt b/Documentation/x86/boot.txt index 406d82d5d2bb..b443f1de0e5a 100644 --- a/Documentation/x86/boot.txt +++ b/Documentation/x86/boot.txt @@ -57,6 +57,10 @@ Protocol 2.10: (Kernel 2.6.31) Added a protocol for relaxed alignment Protocol 2.11: (Kernel 3.6) Added a field for offset of EFI handover protocol entry point. +Protocol 2.12: (Kernel 3.8) Added the xloadflags field and extension fields + to struct boot_params for for loading bzImage and ramdisk + above 4G in 64bit. + **** MEMORY LAYOUT The traditional memory map for the kernel loader, used for Image or @@ -182,7 +186,7 @@ Offset Proto Name Meaning 0230/4 2.05+ kernel_alignment Physical addr alignment required for kernel 0234/1 2.05+ relocatable_kernel Whether kernel is relocatable or not 0235/1 2.10+ min_alignment Minimum alignment, as a power of two -0236/2 N/A pad3 Unused +0236/2 2.12+ xloadflags Boot protocol option flags 0238/4 2.06+ cmdline_size Maximum size of the kernel command line 023C/4 2.07+ hardware_subarch Hardware subarchitecture 0240/8 2.07+ hardware_subarch_data Subarchitecture-specific data @@ -386,6 +390,7 @@ Protocol: 2.00+ F Special (0xFF = undefined) 10 Reserved 11 Minimal Linux Bootloader <http://sebastian-plotz.blogspot.de> + 12 OVMF UEFI virtualization stack Please contact <hpa@zytor.com> if you need a bootloader ID value assigned. @@ -582,6 +587,27 @@ Protocol: 2.10+ misaligned kernel. Therefore, a loader should typically try each power-of-two alignment from kernel_alignment down to this alignment. +Field name: xloadflags +Type: read +Offset/size: 0x236/2 +Protocol: 2.12+ + + This field is a bitmask. + + Bit 0 (read): XLF_KERNEL_64 + - If 1, this kernel has the legacy 64-bit entry point at 0x200. + + Bit 1 (read): XLF_CAN_BE_LOADED_ABOVE_4G + - If 1, kernel/boot_params/cmdline/ramdisk can be above 4G. + + Bit 2 (read): XLF_EFI_HANDOVER_32 + - If 1, the kernel supports the 32-bit EFI handoff entry point + given at handover_offset. + + Bit 3 (read): XLF_EFI_HANDOVER_64 + - If 1, the kernel supports the 64-bit EFI handoff entry point + given at handover_offset + 0x200. + Field name: cmdline_size Type: read Offset/size: 0x238/4 diff --git a/Documentation/x86/zero-page.txt b/Documentation/x86/zero-page.txt index cf5437deda81..199f453cb4de 100644 --- a/Documentation/x86/zero-page.txt +++ b/Documentation/x86/zero-page.txt @@ -19,6 +19,9 @@ Offset Proto Name Meaning 090/010 ALL hd1_info hd1 disk parameter, OBSOLETE!! 0A0/010 ALL sys_desc_table System description table (struct sys_desc_table) 0B0/010 ALL olpc_ofw_header OLPC's OpenFirmware CIF and friends +0C0/004 ALL ext_ramdisk_image ramdisk_image high 32bits +0C4/004 ALL ext_ramdisk_size ramdisk_size high 32bits +0C8/004 ALL ext_cmd_line_ptr cmd_line_ptr high 32bits 140/080 ALL edid_info Video mode setup (struct edid_info) 1C0/020 ALL efi_info EFI 32 information (struct efi_info) 1E0/004 ALL alk_mem_k Alternative mem check, in KB @@ -27,6 +30,7 @@ Offset Proto Name Meaning 1E9/001 ALL eddbuf_entries Number of entries in eddbuf (below) 1EA/001 ALL edd_mbr_sig_buf_entries Number of entries in edd_mbr_sig_buffer (below) +1EF/001 ALL sentinel Used to detect broken bootloaders 290/040 ALL edd_mbr_sig_buffer EDD MBR signatures 2D0/A00 ALL e820_map E820 memory map table (array of struct e820entry) |