Home
last modified time | relevance | path

Searched +full:pwm +full:- +full:enable (Results 1 – 25 of 686) sorted by relevance

12345678910>>...28

/linux/Documentation/hwmon/
H A Dpwm-fan.rst1 Kernel driver pwm-fan
4 This driver enables the use of a PWM module to drive a fan. It uses the
5 generic PWM interface thus it is hardware independent. It can be used on
6 many SoCs, as long as the SoC supplies a PWM line driver that exposes
7 the generic PWM API.
12 -----------
15 a PWM output. It uses the generic PWM interface, thus it can be used with
26 pwm1_enable rw keep enable mode, defines behaviour when pwm1=0
27 0 -> disable pwm and regulator
28 1 -> enable pwm; if pwm==0, disable pwm, keep regulator enabled
[all …]
H A Ddme1737.rst18 Addresses scanned: none, address read from Super-I/O config space
34 Addresses scanned: none, address read from Super-I/O config space
43 -----------------
47 and PWM output control functions. Using this parameter
52 Include non-standard LPC addresses 0x162e and 0x164e
55 - VIA EPIA SN18000
59 -----------
63 and SCH5127 Super-I/O chips. These chips feature monitoring of 3 temp sensors
64 temp[1-3] (2 remote diodes and 1 internal), 8 voltages in[0-7] (7 external and
65 1 internal) and up to 6 fan speeds fan[1-6]. Additionally, the chips implement
[all …]
H A Dsysfs-interface.rst5 through the sysfs interface. Since lm-sensors 3.0.0, libsensors is
6 completely chip-independent. It assumes that all the kernel drivers
10 This is a major improvement compared to lm-sensors 2.
22 For this reason, even if we aim at a chip-independent libsensors, it will
37 Up to lm-sensors 3.0.0, libsensors looks for hardware monitoring attributes
38 in the "physical" device directory. Since lm-sensors 3.0.1, attributes found
61 to cause an alarm) is chip-dependent.
69 ----------------
76 -------------------------------------------------------------------------
79 `[0-*]` denotes any positive number starting from 0
[all …]
H A Dlm93.rst10 Addresses scanned: I2C 0x2c-0x2e
18 Addresses scanned: I2C 0x2c-0x2e
24 - Mark M. Hoffman <mhoffman@lightlink.com>
25 - Ported to 2.6 by Eric J. Bowersox <ericb@aspsys.com>
26 - Adapted to 2.6.20 by Carsten Emde <ce@osadl.org>
27 - Modified for mainline integration by Hans J. Koch <hjk@hansjkoch.de>
30 -----------------
33 Set to non-zero to force some initializations (default is 0).
38 Configures in7 and in8 limit type, where 0 means absolute and non-zero
54 --------------------
[all …]
/linux/Documentation/driver-api/
H A Dpwm.rst2 Pulse Width Modulation (PWM) interface
5 This provides an overview about the Linux PWM interface
9 the Linux PWM API (although they could). However, PWMs are often
12 this kind of flexibility the generic PWM API exists.
15 ----------------
17 Users of the legacy PWM API use unique IDs to refer to PWM devices.
19 Instead of referring to a PWM device via its unique ID, board setup code
20 should instead register a static mapping that can be used to match PWM
24 PWM_LOOKUP("tegra-pwm", 0, "pwm-backlight", NULL,
36 ----------
[all …]
/linux/Documentation/devicetree/bindings/input/
H A Dpwm-vibrator.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/input/pwm-vibrator.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: PWM vibrator
10 - Sebastian Reichel <sre@kernel.org>
13 Registers a PWM device as vibrator. It is expected, that the vibrator's
14 strength increases based on the duty cycle of the enable PWM channel
17 The binding supports an optional direction PWM channel, that can be
23 const: pwm-vibrator
[all …]
/linux/drivers/pwm/
H A Dpwm-stm32-lp.c1 // SPDX-License-Identifier: GPL-2.0
3 * STM32 Low-Power Timer PWM driver
9 * Inspired by Gerald Baeza's pwm-stm32 driver
13 #include <linux/mfd/stm32-lptimer.h>
18 #include <linux/pwm.h>
31 /* STM32 Low-Power Timer is preceded by a configurable power-of-2 prescaler */
40 /* Only one PWM on this LPTIMER: enable, prescaler and reload value can be changed */ in stm32_pwm_lp_update_allowed()
41 if (!priv->num_cc_chans) in stm32_pwm_lp_update_allowed()
44 ret = regmap_read(priv->regmap, STM32_LPTIM_CCMR1, &ccmr1); in stm32_pwm_lp_update_allowed()
49 /* More than one channel enabled: enable, prescaler or ARR value can't be changed */ in stm32_pwm_lp_update_allowed()
[all …]
H A Dpwm-sprd.c1 // SPDX-License-Identifier: GPL-2.0
13 #include <linux/pwm.h>
46 * The list of clocks required by PWM channels, and each channel has 2 clocks:
47 * enable clock and pwm clock.
60 return readl_relaxed(spc->base + offset); in sprd_pwm_read()
68 writel_relaxed(val, spc->base + offset); in sprd_pwm_write()
71 static int sprd_pwm_get_state(struct pwm_chip *chip, struct pwm_device *pwm, in sprd_pwm_get_state() argument
75 struct sprd_pwm_chn *chn = &spc->chn[pwm->hwpwm]; in sprd_pwm_get_state()
81 * The clocks to PWM channel has to be enabled first before in sprd_pwm_get_state()
84 ret = clk_bulk_prepare_enable(SPRD_PWM_CHN_CLKS_NUM, chn->clks); in sprd_pwm_get_state()
[all …]
H A Dpwm-sti.c1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * PWM device driver for ST SoCs
5 * Copyright (C) 2013-2016 STMicroelectronics (R&D) Limited
18 #include <linux/pwm.h>
30 #define STI_INT_EN 0x54 /* Interrupt Enable/Disable register */
59 * Each capture input can be programmed to detect rising-edge, falling-edge,
123 clk_rate = clk_get_rate(pc->pwm_clk); in sti_pwm_get_prescale()
125 dev_err(pc->dev, "failed to get clock rate\n"); in sti_pwm_get_prescale()
126 return -EINVAL; in sti_pwm_get_prescale()
130 * prescale = ((period_ns * clk_rate) / (10^9 * (max_pwm_cnt + 1)) - 1 in sti_pwm_get_prescale()
[all …]
H A Dpwm-rockchip.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * PWM driver for Rockchip SoCs
17 #include <linux/pwm.h>
62 struct pwm_device *pwm, in rockchip_pwm_get_state() argument
66 u64 prescaled_ns = (u64)pc->data->prescaler * NSEC_PER_SEC; in rockchip_pwm_get_state()
67 u32 enable_conf = pc->data->enable_conf; in rockchip_pwm_get_state()
73 ret = clk_enable(pc->pclk); in rockchip_pwm_get_state()
77 ret = clk_enable(pc->clk); in rockchip_pwm_get_state()
81 clk_rate = clk_get_rate(pc->clk); in rockchip_pwm_get_state()
83 tmp = readl_relaxed(pc->base + pc->data->regs.period); in rockchip_pwm_get_state()
[all …]
H A Dpwm-twl.c1 // SPDX-License-Identifier: GPL-2.0-only
12 #include <linux/pwm.h>
32 #define TWL4030_PWM_TOGGLE(pwm, x) ((x) << (pwm)) argument
46 #define TWL6030_PWM_TOGGLE(pwm, x) ((x) << (pwm * 3)) argument
59 static int twl_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm, in twl_pwm_config() argument
68 * On-cycle is set to 1 (the minimum allowed value) in twl_pwm_config()
70 * 0 -> off cycle = 2, in twl_pwm_config()
71 * 1 -> off cycle = 2, in twl_pwm_config()
72 * 2 -> off cycle = 3, in twl_pwm_config()
73 * 126 - > off cycle 127, in twl_pwm_config()
[all …]
H A Dpwm-sifive.c1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (C) 2017-2018 SiFive
4 * For SiFive's PWM IP block documentation please refer Chapter 14 of
5 * Reference Manual : https://static.dev.sifive.com/FU540-C000-v1.0.pdf
7 * PWM output inversion: According to the SiFive Reference manual
12 * hard-tied to 0 (XNOR), which effectively inverts the comparison so that
21 * **active-high** PWM interface.
25 * - When changing both duty cycle and period, we cannot prevent in
28 * - The hardware cannot generate a 0% duty cycle.
29 * - The hardware generates only inverted output.
[all …]
H A Dpwm-dwc-core.c1 // SPDX-License-Identifier: GPL-2.0
3 * DesignWare PWM Controller driver core
5 * Copyright (C) 2018-2020 Intel Corporation
20 #include <linux/pwm.h>
22 #include "pwm-dwc.h"
24 static void __dwc_pwm_set_enable(struct dwc_pwm *dwc, int pwm, int enabled) in __dwc_pwm_set_enable() argument
28 reg = dwc_pwm_readl(dwc, DWC_TIM_CTRL(pwm)); in __dwc_pwm_set_enable()
35 dwc_pwm_writel(dwc, reg, DWC_TIM_CTRL(pwm)); in __dwc_pwm_set_enable()
39 struct pwm_device *pwm, in __dwc_pwm_configure_timer() argument
52 tmp = DIV_ROUND_CLOSEST_ULL(state->duty_cycle, dwc->clk_ns); in __dwc_pwm_configure_timer()
[all …]
/linux/Documentation/devicetree/bindings/leds/backlight/
H A Dpwm-backlight.yaml1 # SPDX-License-Identifier: GPL-2.0-only
3 ---
4 $id: http://devicetree.org/schemas/leds/backlight/pwm-backlight.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: pwm-backlight
10 - Lee Jones <lee@kernel.org>
11 - Daniel Thompson <daniel.thompson@linaro.org>
12 - Jingoo Han <jingoohan1@gmail.com>
15 - $ref: common.yaml#
19 const: pwm-backlight
[all …]
H A Dmediatek,mt6370-backlight.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/leds/backlight/mediatek,mt6370-backlight.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - ChiaEn Wu <chiaen_wu@richtek.com>
21 - $ref: common.yaml#
26 - mediatek,mt6370-backlight
27 - mediatek,mt6372-backlight
29 default-brightness:
32 max-brightness:
[all …]
/linux/Documentation/devicetree/bindings/regulator/
H A Dpwm-regulator.yaml1 # SPDX-License-Identifier: GPL-2.0
3 ---
4 $id: http://devicetree.org/schemas/regulator/pwm-regulator.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Generic PWM Regulator
10 - Brian Norris <briannorris@chromium.org>
11 - Lee Jones <lee@kernel.org>
12 - Alexandre Courbot <acourbot@nvidia.com>
19 duty-cycle values must be provided via DT. Limitations are that the
21 Intermediary duty-cycle values which would normally allow finer grained
[all …]
H A Dtps51632-regulator.txt4 - compatible: Must be "ti,tps51632"
5 - reg: I2C slave address
8 - ti,enable-pwm-dvfs: Enable the DVFS voltage control through the PWM interface.
9 - ti,dvfs-step-20mV: The 20mV step voltage when PWM DVFS enabled. Missing this
10 will set 10mV step voltage in PWM DVFS mode. In normal mode, the voltage
21 regulator-name = "tps51632-vout";
22 regulator-min-microvolt = <500000>;
23 regulator-max-microvolt = <1500000>;
24 regulator-boot-on;
25 ti,enable-pwm-dvfs;
[all …]
/linux/drivers/input/misc/
H A Dpwm-vibra.c1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * PWM vibrator driver
10 * Based on PWM beeper driver:
11 * Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
21 #include <linux/pwm.h>
28 struct pwm_device *pwm; member
40 struct device *pdev = vibrator->input->dev.parent; in pwm_vibrator_start()
44 if (!vibrator->vcc_on) { in pwm_vibrator_start()
45 err = regulator_enable(vibrator->vcc); in pwm_vibrator_start()
47 dev_err(pdev, "failed to enable regulator: %d\n", err); in pwm_vibrator_start()
[all …]
/linux/Documentation/ABI/testing/
H A Dsysfs-class-pwm1 What: /sys/class/pwm/
6 The pwm/ class sub-directory belongs to the Generic PWM
7 Framework and provides a sysfs interface for using PWM
10 What: /sys/class/pwm/pwmchip<N>/
15 A /sys/class/pwm/pwmchipN directory is created for each
16 probed PWM controller/chip where N is the base of the
17 PWM chip.
19 What: /sys/class/pwm/pwmchip<N>/npwm
24 The number of PWM channels supported by the PWM chip.
26 What: /sys/class/pwm/pwmchip<N>/export
[all …]
/linux/drivers/regulator/
H A Dpwm-regulator.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * Regulator driver for PWM Regulators
5 * Copyright (C) 2014 - STMicroelectronics Inc.
18 #include <linux/pwm.h>
29 struct pwm_device *pwm; member
42 /* Enable GPIO */
52 * Voltage table call-backs
61 pwm_get_state(drvdata->pwm, &pwm_state); in pwm_regulator_init_state()
64 for (i = 0; i < rdev->desc->n_voltages; i++) { in pwm_regulator_init_state()
65 if (dutycycle == drvdata->duty_cycle_table[i].dutycycle) { in pwm_regulator_init_state()
[all …]
/linux/drivers/video/backlight/
H A Dpwm_bl.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * Simple PWM based backlight control, board code has to setup
4 * 1) pin configuration so PWM waveforms can output
16 #include <linux/pwm.h>
22 struct pwm_device *pwm; member
43 if (pb->enabled) in pwm_backlight_power_on()
46 if (pb->power_supply) { in pwm_backlight_power_on()
47 err = regulator_enable(pb->power_supply); in pwm_backlight_power_on()
49 dev_err(pb->dev, "failed to enable power supply\n"); in pwm_backlight_power_on()
52 if (pb->post_pwm_on_delay) in pwm_backlight_power_on()
[all …]
/linux/drivers/leds/
H A Dleds-lm3530.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) 2011 ST-Ericsson SA.
9 * based on leds-lm3530.c by Dan Murphy <D.Murphy@motorola.com>
17 #include <linux/led-lm3530.h>
22 #define LM3530_LED_DEV "lcd-backlight"
23 #define LM3530_NAME "lm3530-led"
92 { "pwm", LM3530_BL_MODE_PWM },
100 * @mode: mode of operation - manual, ALS, PWM
103 * @enable: regulator is enabled
112 bool enable; member
[all …]
/linux/arch/arm/boot/dts/nxp/imx/
H A Dimx7-colibri-iris.dtsi1 // SPDX-License-Identifier: GPL-2.0-or-later OR MIT
12 * The Atmel maxtouch controller uses SODIMM 28/30, also used for PWM<B>, PWM<C>, aka pwm2, pwm3.
13 * So if you enable following capacitive touch controller, disable pwm2/pwm3 first.
16 interrupt-parent = <&gpio1>;
18 pinctrl-0 = <&pinctrl_atmel_adapter>;
19 reset-gpios = <&gpio1 10 GPIO_ACTIVE_LOW>; /* SODIMM 30 / RST */
38 uart25-tx-on-hog {
39 gpio-hog;
41 output-high;
46 uart1-tx-on-hog {
[all …]
H A Dimx7-colibri-eval-v3.dtsi1 // SPDX-License-Identifier: GPL-2.0-or-later OR MIT
3 * Copyright 2016-2022 Toradex
9 compatible = "fixed-clock";
10 #clock-cells = <0>;
11 clock-frequency = <16000000>;
21 * The Atmel maxtouch controller uses SODIMM 28/30, also used for PWM<B>, PWM<C>, aka pwm2, pwm3.
22 * So if you enable following capacitive touch controller, disable pwm2/pwm3 first.
25 interrupt-parent = <&gpio1>;
27 pinctrl-0 = <&pinctrl_atmel_adapter>;
28 reset-gpios = <&gpio1 10 GPIO_ACTIVE_LOW>; /* SODIMM 30 / RST */
[all …]
/linux/arch/arm64/boot/dts/qcom/
H A Dmsm8916-samsung-gt510.dts1 // SPDX-License-Identifier: GPL-2.0-only
3 /dts-v1/;
5 #include "msm8916-samsung-gt5-common.dtsi"
10 chassis-type = "tablet";
12 speaker_codec: audio-codec {
14 sdmode-gpios = <&tlmm 55 GPIO_ACTIVE_HIGH>;
15 #sound-dai-cells = <0>;
16 pinctrl-0 = <&audio_sdmode_default>;
17 pinctrl-names = "default";
20 clk_pwm: pwm {
[all …]

12345678910>>...28