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/openbmc/linux/Documentation/devicetree/bindings/pwm/
H A Dgoogle,cros-ec-pwm.yaml1 # SPDX-License-Identifier: GPL-2.0
3 ---
4 $id: http://devicetree.org/schemas/pwm/google,cros-ec-pwm.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: PWM controlled by ChromeOS EC
10 - Thierry Reding <thierry.reding@gmail.com>
11 - '"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>'
14 Google's ChromeOS EC PWM is a simple PWM attached to the Embedded Controller
15 (EC) and controlled via a host-command interface.
16 An EC PWM node should be only found as a sub-node of the EC node (see
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/openbmc/linux/drivers/pwm/
H A Dpwm-cros-ec.c1 // SPDX-License-Identifier: GPL-2.0
3 * Expose a PWM controlled by the ChromeOS EC to the host processor.
13 #include <linux/pwm.h>
16 #include <dt-bindings/mfd/cros_ec.h>
19 * struct cros_ec_pwm_device - Driver data for EC PWM
22 * @ec: Pointer to EC device
23 * @chip: PWM controller chip
24 * @use_pwm_type: Use PWM types instead of generic channels
28 struct cros_ec_device *ec; member
34 * struct cros_ec_pwm - per-PWM driver data
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H A Dpwm-ntxec.c1 // SPDX-License-Identifier: GPL-2.0-or-later
4 * e-book readers designed by the original design manufacturer Netronix, Inc.
5 * It contains RTC, battery monitoring, system power management, and PWM
8 * This driver implements PWM output.
13 * - The get_state callback is not implemented, because the current state of
14 * the PWM output can't be read back from the hardware.
15 * - The hardware can only generate normal polarity output.
16 * - The period and duty cycle can't be changed together in one atomic action.
22 #include <linux/pwm.h>
27 struct ntxec *ec; member
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H A DMakefile1 # SPDX-License-Identifier: GPL-2.0
2 obj-$(CONFIG_PWM) += core.o
3 obj-$(CONFIG_PWM_SYSFS) += sysfs.o
4 obj-$(CONFIG_PWM_AB8500) += pwm-ab8500.o
5 obj-$(CONFIG_PWM_APPLE) += pwm-apple.o
6 obj-$(CONFIG_PWM_ATMEL) += pwm-atmel.o
7 obj-$(CONFIG_PWM_ATMEL_HLCDC_PWM) += pwm-atmel-hlcdc.o
8 obj-$(CONFIG_PWM_ATMEL_TCB) += pwm-atmel-tcb.o
9 obj-$(CONFIG_PWM_BCM_IPROC) += pwm-bcm-iproc.o
10 obj-$(CONFIG_PWM_BCM_KONA) += pwm-bcm-kona.o
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/openbmc/linux/Documentation/devicetree/bindings/mfd/
H A Dgoogle,cros-ec.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/mfd/google,cros-ec.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Benson Leung <bleung@chromium.org>
11 - Guenter Roeck <groeck@chromium.org>
14 Google's ChromeOS EC is a microcontroller which talks to the AP and
16 The EC can be connected through various interfaces (I2C, SPI, and others)
22 - description:
23 For implementations of the EC connected through I2C.
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H A Dnetronix,ntxec.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Jonathan Neuschäfer <j.neuschaefer@gmx.net>
13 This EC is found in e-book readers of multiple brands (e.g. Kobo, Tolino), and
22 - description: The I2C address of the EC
24 system-power-controller:
26 description: See Documentation/devicetree/bindings/power/power-controller.txt
31 The EC can signal interrupts via a GPIO line
33 "#pwm-cells":
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/openbmc/dbus-sensors/src/fan/
H A DFanMain.cpp8 // http://www.apache.org/licenses/LICENSE-2.0
80 {"aspeed,ast2400-pwm-tacho", FanTypes::aspeed},
81 {"aspeed,ast2500-pwm-tacho", FanTypes::aspeed},
82 {"aspeed,ast2600-pwm-tach", FanTypes::aspeed},
83 {"nuvoton,npcm750-pwm-fan", FanTypes::nuvoton},
84 {"nuvoton,npcm845-pwm-fan", FanTypes::nuvoton},
85 {"hpe,gxp-fan-ctrl", FanTypes::hpe}
117 return compatibleIterator->second; in getFanType()
142 /* Search PWM since pwm-fan had separated in findPwmfanPath()
143 * PWM from tach directory and 1 channel only*/ in findPwmfanPath()
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/openbmc/u-boot/arch/arm/dts/
H A Drk3399-gru.dtsi1 // SPDX-License-Identifier: (GPL-2.0+ OR MIT)
5 * Copyright 2016-2017 Google, Inc
8 #include <dt-bindings/input/input.h>
10 #include "rk3399-op1-opp.dtsi"
14 u-boot,dm-pre-reloc;
15 stdout-path = "serial2:115200n8";
16 u-boot,spl-boot-order = &spi_flash;
20 u-boot,spl-payload-offset = <0x40000>;
29 * - Rails that only connect to the EC (or devices that the EC talks to)
31 * - Rails _are_ included if the rails go to the AP even if the AP
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H A Drk3399-gru-chromebook.dtsi1 // SPDX-License-Identifier: (GPL-2.0+ OR MIT)
3 * Google Gru-Chromebook shared properties
8 #include "rk3399-gru.dtsi"
11 pp900_ap: pp900-ap {
12 compatible = "regulator-fixed";
13 regulator-name = "pp900_ap";
15 /* EC turns on w/ pp900_ap_en; always on for AP */
16 regulator-always-on;
17 regulator-boot-on;
18 regulator-min-microvolt = <900000>;
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H A Dexynos5420-peach-pit.dts1 // SPDX-License-Identifier: GPL-2.0+
3 * SAMSUNG/GOOGLE Peach-Pit board device tree source
9 /dts-v1/;
11 #include <dt-bindings/clock/maxim,max77802.h>
12 #include <dt-bindings/regulator/maxim,max77802.h>
17 compatible = "google,pit-rev#", "google,pit",
21 google,bad-wake-gpios = <&gpx0 6 GPIO_ACTIVE_HIGH>;
22 hwid = "PIT TEST A-A 7848";
23 lazy-init = <1>;
34 compatible = "pwm-backlight";
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H A Dexynos5800-peach-pi.dts1 // SPDX-License-Identifier: GPL-2.0+
3 * SAMSUNG/GOOGLE Peach-Pit board device tree source
9 /dts-v1/;
14 cpu-model = "Exynos5800";
16 compatible = "google,pit-rev#", "google,pit",
20 google,bad-wake-gpios = <&gpx0 6 GPIO_ACTIVE_HIGH>;
21 hwid = "PIT TEST A-A 7848";
22 lazy-init = <1>;
33 compatible = "pwm-backlight";
34 pwms = <&pwm 0 1000000 0>;
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/openbmc/linux/arch/arm64/boot/dts/rockchip/
H A Drk3399-gru.dtsi1 // SPDX-License-Identifier: (GPL-2.0+ OR MIT)
5 * Copyright 2016-2017 Google, Inc
8 #include <dt-bindings/input/input.h>
10 #include "rk3399-op1-opp.dtsi"
19 stdout-path = "serial2:115200n8";
28 * - Rails that only connect to the EC (or devices that the EC talks to)
30 * - Rails _are_ included if the rails go to the AP even if the AP
39 * - The EC controls the enable and the EC always enables a rail as
41 * - The rails are actually connected to each other by a jumper and
46 ppvar_sys: ppvar-sys {
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H A Drk3399-gru-chromebook.dtsi1 // SPDX-License-Identifier: (GPL-2.0+ OR MIT)
3 * Google Gru-Chromebook shared properties
8 #include "rk3399-gru.dtsi"
11 pp900_ap: pp900-ap {
12 compatible = "regulator-fixed";
13 regulator-name = "pp900_ap";
15 /* EC turns on w/ pp900_ap_en; always on for AP */
16 regulator-always-on;
17 regulator-boot-on;
18 regulator-min-microvolt = <900000>;
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/openbmc/linux/arch/arm64/boot/dts/qcom/
H A Dsc7280-idp-ec-h1.dtsi1 // SPDX-License-Identifier: BSD-3-Clause
3 * sc7280 EC/H1 over SPI (common between IDP2 and CRD)
11 pinctrl-0 = <&qup_spi10_data_clk>, <&qup_spi10_cs_gpio_init_high>, <&qup_spi10_cs_gpio>;
12 cs-gpios = <&tlmm 43 GPIO_ACTIVE_LOW>;
14 cros_ec: ec@0 {
15 compatible = "google,cros-ec-spi";
17 interrupt-parent = <&tlmm>;
19 pinctrl-names = "default";
20 pinctrl-0 = <&ap_ec_int_l>;
21 spi-max-frequency = <3000000>;
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H A Dsc7280-herobrine.dtsi1 // SPDX-License-Identifier: (GPL-2.0+ OR MIT)
16 #include <dt-bindings/input/gpio-keys.h>
17 #include <dt-bindings/input/input.h>
18 #include <dt-bindings/leds/common.h>
20 #include "sc7280-qcard.dtsi"
21 #include "sc7280-chrome-common.dtsi"
25 stdout-path = "serial0:115200n8";
38 ppvar_sys: ppvar-sys-regulator {
39 compatible = "regulator-fixed";
40 regulator-name = "ppvar_sys";
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/openbmc/linux/drivers/platform/chrome/wilco_ec/
H A Dkeyboard_leds.c1 // SPDX-License-Identifier: GPL-2.0
7 * Since the EC will never change the backlight level of its own accord,
14 #include <linux/platform_data/wilco-ec.h>
22 struct wilco_ec_device *ec; member
33 * struct wilco_keyboard_leds_msg - Message to/from EC for keyboard LED control.
35 * @status: Set by EC to 0 on success, 0xFF on failure.
40 * @percent: Brightness in 0-100. Only meaningful in PWM mode.
55 static int send_kbbl_msg(struct wilco_ec_device *ec, in send_kbbl_msg() argument
69 ret = wilco_ec_mailbox(ec, &msg); in send_kbbl_msg()
71 dev_err(ec->dev, in send_kbbl_msg()
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/openbmc/linux/drivers/mfd/
H A Dntxec.c1 // SPDX-License-Identifier: GPL-2.0-or-later
4 * e-book readers designed by the original design manufacturer Netronix, Inc.
5 * It contains RTC, battery monitoring, system power management, and PWM
9 * power-off/reset.
43 .addr = poweroff_restart_client->addr, in ntxec_poweroff()
52 res = i2c_transfer(poweroff_restart_client->adapter, msgs, ARRAY_SIZE(msgs)); in ntxec_poweroff()
54 dev_warn(&poweroff_restart_client->dev, in ntxec_poweroff()
73 * does send the full two-byte value, but doesn't check the result). in ntxec_restart()
77 .addr = poweroff_restart_client->addr, in ntxec_restart()
79 .len = sizeof(buf) - 1, in ntxec_restart()
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/openbmc/linux/drivers/hwmon/
H A Doxp-sensors.c1 // SPDX-License-Identifier: GPL-2.0+
10 * Fan control is provided via pwm interface in the range [0-255].
11 * Old AMD boards use [0-100] as range in the EC, the written value is
13 * AOK ZOE are not scaled but have the same EC layout.
55 /* Fan reading and PWM */
57 #define OXP_SENSOR_PWM_ENABLE_REG 0x4A /* PWM enable is 1 register long */
58 #define OXP_SENSOR_PWM_REG 0x4B /* PWM reading is 1 register long */
61 * Older boards have different values and EC registers
117 DMI_MATCH(DMI_BOARD_VENDOR, "ONE-NETBOOK"),
124 DMI_MATCH(DMI_BOARD_VENDOR, "ONE-NETBOOK"),
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/openbmc/phosphor-pid-control/pid/
H A Dfancontroller.cpp8 * http://www.apache.org/licenses/LICENSE-2.0
33 const std::vector<std::string>& inputs, const ec::pidinfo& initial) in createFanPid()
40 ec::pid_info_t* info = fan->getPIDInfo(); in createFanPid()
58 value = _owner->getCachedValues(name).unscaled; in inputProc()
65 * sort of have to guess -- all the other fans are reporting, why in inputProc()
92 * in the configuration, and it's a nice-to-have.. in inputProc()
103 double maxRPM = _owner->getMaxSetPointRequest(); in setptProc()
133 bool failsafeCurrState = _owner->getFailSafeMode(); in outputProc()
144 double failsafePercent = _owner->getFailSafePercent(); in outputProc()
147 // Unconditionally replace the computed PWM with the in outputProc()
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H A Dstepwisecontroller.cpp8 // http://www.apache.org/licenses/LICENSE-2.0
19 #include "ec/stepwise.hpp"
42 ec::StepwiseInfo info = getStepwiseInfo(); in process()
49 output = ec::stepwise(info, input); in process()
52 else if ((input - lastInput) > info.positiveHysteresis) in process()
54 output = ec::stepwise(info, input); in process()
57 else if ((lastInput - input) > info.negativeHysteresis) in process()
59 output = ec::stepwise(info, input); in process()
72 const std::vector<std::string>& inputs, const ec::StepwiseInfo& initial) in createStepwiseController()
81 thermal->setStepwiseInfo(initial); in createStepwiseController()
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/openbmc/phosphor-pid-control/
H A Dmeson.build2 'phosphor-pid-control', 'cpp',
20 conf_data.set('STRICT_FAILSAFE_PWM', get_option('strict-failsafe-pwm'))
21 conf_data.set('OFFLINE_FAILSAFE_PWM', get_option('offline-failsafe-pwm'))
22 conf_data.set('UNC_FAILSAFE', get_option('unc-failsafe'))
28 if get_option('oe-sdk').allowed()
29 OECORE_TARGET_SYSROOT = run_command('sh', '-c', 'echo $OECORE_TARGET_SYSROOT').stdout().strip()
31 error('OECORE_TARGET_SYSROOT must be set with enable oe-sdk')
33 message('Enabling OE-SDK at OECORE_TARGET_SYSROOT: ' + OECORE_TARGET_SYSROOT)
35 …ld_so = run_command('sh', '-c', 'find ' + OECORE_TARGET_SYSROOT + '/lib/ld-*.so | sort -r -n | hea…
36 dynamic_linker = ['-Wl,-dynamic-linker,' + ld_so]
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H A Dconf.hpp3 #include "pid/ec/pid.hpp"
4 #include "pid/ec/stepwise.hpp"
40 * with dynamic sensors from entity-manager.
58 ec::pidinfo pidInfo; // pid details
59 ec::StepwiseInfo stepwiseInfo;
79 /* The minimum set-point value we would ever want (typically in RPM) */
82 /* If the sensors are in fail-safe mode, this is the percentage to use. */
88 /* Enable accumulation of the output PWM of different controllers with same
/openbmc/phosphor-pid-control/test/
H A Dpid_fancontroller_unittest.cpp6 #include "pid/ec/logging.hpp"
7 #include "pid/ec/pid.hpp"
36 ec::pidinfo initial; in TEST()
51 ec::pidinfo initial; in TEST()
65 ec::pidinfo initial; in TEST()
74 EXPECT_EQ(0.0, p->inputProc()); in TEST()
79 // A sensor value returning sub-zero is ignored as an error. in TEST()
83 ec::pidinfo initial; in TEST()
89 EXPECT_CALL(z, getCachedValue(StrEq("fan0"))).WillOnce(Return(-1)); in TEST()
90 EXPECT_CALL(z, getCachedValue(StrEq("fan1"))).WillOnce(Return(-1)); in TEST()
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/openbmc/linux/arch/arm/boot/dts/amlogic/
H A Dmeson8b-ec100.dts1 // SPDX-License-Identifier: (GPL-2.0+ OR MIT)
6 /dts-v1/;
8 #include <dt-bindings/gpio/gpio.h>
9 #include <dt-bindings/input/input.h>
22 stdout-path = "serial0:115200n8";
30 emmc_pwrseq: emmc-pwrseq {
31 compatible = "mmc-pwrseq-emmc";
32 reset-gpios = <&gpio BOOT_9 GPIO_ACTIVE_LOW>;
35 gpio-keys {
36 compatible = "gpio-keys-polled";
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/openbmc/linux/drivers/rtc/
H A Drtc-ntxec.c1 // SPDX-License-Identifier: GPL-2.0-or-later
4 * e-book readers designed by the original design manufacturer Netronix, Inc.
5 * It contains RTC, battery monitoring, system power management, and PWM
22 struct ntxec *ec; member
43 res = regmap_read(rtc->ec->regmap, NTXEC_REG_READ_MINUTE_SECOND, &value); in ntxec_read_time()
47 tm->tm_min = value >> 8; in ntxec_read_time()
48 tm->tm_sec = value & 0xff; in ntxec_read_time()
50 res = regmap_read(rtc->ec->regmap, NTXEC_REG_READ_MDAY_HOUR, &value); in ntxec_read_time()
54 tm->tm_mday = value >> 8; in ntxec_read_time()
55 tm->tm_hour = value & 0xff; in ntxec_read_time()
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