- 08 Jun, 2023 7 commits
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Henning Schild authored
In order to clearly describe the dependencies between the GPIO controller drivers and the users the driver is split up into a core, two drivers and a common header. Signed-off-by:
Henning Schild <henning.schild@siemens.com> Acked-by:
Hans de Goede <hdegoede@redhat.com> Signed-off-by:
Lee Jones <lee@kernel.org> Link: https://lore.kernel.org/r/20230524124628.32295-4-henning.schild@siemens.com
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Henning Schild authored
There are two special pins needed to init the LEDs. We used to have them at the end of the gpiod_lookup table to give to "leds-gpio". A cleaner way is to have a dedicated table for the special pins. Signed-off-by:
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Henning Schild authored
The entries do not seem to be stricly needed when the number of entries is given via the number of LEDs. But adding them is a safeguard should anyone ever iterate over the tables to their end, it also gets us in line with other drivers that register "leds-gpio" tables. Reported-by:
Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by:
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Jiapeng Chong authored
The variable 'count' is defined as unsigned type, so the following if statement is invalid, we can modify the type of count to int. if (count <= 0) { dev_err(dev, "No led-sources specified\n"); return -ENODEV; } ./drivers/leds/flash/leds-qcom-flash.c:546:5-10: WARNING: Unsigned expression compared with zero: count <= 0. Reported-by:Abaci Robot <abaci@linux.alibaba.com> Closes: https://bugzilla.openanolis.cn/show_bug.cgi?id=5344Signed-off-by:
Jiapeng Chong <jiapeng.chong@linux.alibaba.com> Signed-off-by:
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Jiapeng Chong authored
No functional modification involved. ./drivers/leds/leds-cht-wcove.c:193:2-3: Unneeded semicolon. Reported-by:
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Yang Li authored
The return value from the call to cht_wc_leds_find_freq() is int. However, the return value is being assigned to an unsigned int variable 'ctrl', so making it an int. Eliminate the following warning: drivers/leds/leds-cht-wcove.c:236 cht_wc_leds_set_effect() warn: unsigned 'ctrl' is never less than zero. Reported-by:
Yang Li <yang.lee@linux.alibaba.com> Signed-off-by:
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Hans de Goede authored
cht_wc_leds_brightness_get() is only used internally, mark it static. Cc: Yauhen Kharuzhy <jekhor@gmail.com> Reported-by:
kernel test robot <lkp@intel.com> Closes: https://lore.kernel.org/oe-kbuild-all/202305260008.QCRrKILf-lkp@intel.com/Signed-off-by:
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- 01 Jun, 2023 2 commits
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Martin Kurbanov authored
Add YAML devicetree binding for AWINIC AW20036/AW20052/AW20074 led driver. Signed-off-by:
Martin Kurbanov <mmkurbanov@sberdevices.ru> Reviewed-by:
Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Link: https://lore.kernel.org/r/20230519130403.212479-2-mmkurbanov@sberdevices.ruSigned-off-by:
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Martin Kurbanov authored
This commit adds support for AWINIC AW20036/AW20054/AW20072 LED driver. This driver supports following AW200XX features: - Individual 64-level DIM currents Signed-off-by:
Andy Shevchenko <andy.shevchenko@gmail.com> Link: https://lore.kernel.org/r/20230519130403.212479-3-mmkurbanov@sberdevices.ruSigned-off-by:
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- 25 May, 2023 31 commits
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Lu Hongfei authored
Ensure child node references are decremented properly in the error path. Signed-off-by:
Lu Hongfei <luhongfei@vivo.com> Link: https://lore.kernel.org/r/20230525111705.3055-1-luhongfei@vivo.comSigned-off-by:
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Neil Armstrong authored
The PM8550 PWM modules are compatible with the PM8350c PWM modules, document the PM8350c PWM compatible as fallback for the PM8550 PWM. Signed-off-by:
Neil Armstrong <neil.armstrong@linaro.org> Reviewed-by:
Conor Dooley <conor.dooley@microchip.com> Link: https://lore.kernel.org/r/20230522-topic-sm8550-upstream-pm8550-lpg-v2-1-c5117f1d41f9@linaro.orgSigned-off-by:
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Dylan Van Assche authored
Document compatible for PMI8998 Torch and Flash LED controller. Signed-off-by:
Dylan Van Assche <me@dylanvanassche.be> Acked-by:
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Luca Weiss authored
The path /sys/class/leds/rgb:status is already widely used with the qcom-lpg driver and others. Document it. Signed-off-by:
Luca Weiss <luca@z3ntu.xyz> Link: https://lore.kernel.org/r/20230414-pmi632-v3-3-079d2cada699@z3ntu.xyzSigned-off-by:
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Krzysztof Kozlowski authored
Document compatible for PM8550 Torch and Flash LED controller. Signed-off-by:
Konrad Dybcio <konrad.dybcio@linaro.org> Link: https://lore.kernel.org/r/20230516150202.188655-1-krzysztof.kozlowski@linaro.orgSigned-off-by:
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Azeem Shaikh authored
Part of a tree-wide effort to remove deprecated strlcpy()[1] and replace it with strscpy()[2]. No return values were used, so direct replacement is safe. [1] https://www.kernel.org/doc/html/latest/process/deprecated.html#strlcpy [2] https://github.com/KSPP/linux/issues/89Signed-off-by:
Azeem Shaikh <azeemshaikh38@gmail.com> Link: https://lore.kernel.org/r/20230524144824.2360607-1-azeemshaikh38@gmail.comSigned-off-by:
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Marek Vasut authored
Each gpio-leds DT node DT subnode can have a pinctrl property assigned to it, parse the DT subnode pinctrl properties and configure each pin accordingly. Tested-by:
Christoph Niedermaier <cniedermaier@dh-electronics.com> Signed-off-by:
Marek Vasut <marex@denx.de> Link: https://lore.kernel.org/r/20230523183151.5460-1-marex@denx.deSigned-off-by:
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Azeem Shaikh authored
strlcpy() reads the entire source buffer first. This read may exceed the destination size limit. This is both inefficient and can lead to linear read overflows if a source string is not NUL-terminated [1]. In an effort to remove strlcpy() completely [2], replace strlcpy() here with strscpy(). No return values were used, so direct replacement is safe. [1] https://www.kernel.org/doc/html/latest/process/deprecated.html#strlcpy [2] https://github.com/KSPP/linux/issues/89Signed-off-by:
Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20230523021451.2406362-1-azeemshaikh38@gmail.comSigned-off-by:
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Azeem Shaikh authored
strlcpy() reads the entire source buffer first. This read may exceed the destination size limit. This is both inefficient and can lead to linear read overflows if a source string is not NUL-terminated [1]. In an effort to remove strlcpy() completely [2], replace strlcpy() here with strscpy(). No return values were used, so direct replacement is safe. [1] https://www.kernel.org/doc/html/latest/process/deprecated.html#strlcpy [2] https://github.com/KSPP/linux/issues/89Signed-off-by:
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Niklas Schnelle authored
In a future patch HAS_IOPORT=n will result in inb()/outb() and friends not being declared. We thus need to add HAS_IOPORT as dependency for those drivers using them. Co-developed-by:
Arnd Bergmann <arnd@kernel.org> Signed-off-by:
Niklas Schnelle <schnelle@linux.ibm.com> Acked-by:
Pavel Machek <pavel@ucw.cz> Link: https://lore.kernel.org/r/20230522105049.1467313-18-schnelle@linux.ibm.comSigned-off-by:
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Yang Li authored
The call netdev_{put, hold} of dev_{put, hold} will check NULL, so there is no need to check before using dev_{put, hold}, remove it to silence the warnings: ./drivers/leds/trigger/ledtrig-netdev.c:291:3-10: WARNING: NULL check before dev_{put, hold} functions is not needed. ./drivers/leds/trigger/ledtrig-netdev.c:401:2-9: WARNING: NULL check before dev_{put, hold} functions is not needed. Reported-by: -
Hans de Goede authored
Not all triggers use LED_INIT_DEFAULT_TRIGGER, which means that it will not get cleared when the default trigger is a trigger which does not use it such as "default-on". If the default trigger then later gets replaced by a trigger which does check LED_INIT_DEFAULT_TRIGGER, such as "timer" then that trigger will behave as if it is the default trigger which it should not do. To fix this clear the LED_INIT_DEFAULT_TRIGGER flag when clearing the current trigger, so that it will not be set for any subsequently set (non default) triggers. Signed-off-by:
Jacek Anaszewski <jacek.anaszewski@gmail.com> Tested-by:
Yauhen Kharuzhy <jekhor@gmail.com> Link: https://lore.kernel.org/r/20230510162234.291439-5-hdegoede@redhat.comSigned-off-by:
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Hans de Goede authored
led_trigger_blink() calls led_blink_set() from a RCU read-side critical section so led_blink_set() must not sleep. Note sleeping was not allowed before the switch to RCU either because a spinlock was held before. led_blink_set() does not sleep when sw-blinking is used, but many LED controller drivers with hw blink support have a blink_set function which may sleep, leading to an oops like this one: [ 832.605062] ------------[ cut here ]------------ [ 832.605085] Voluntary context switch within RCU read-side critical section! [ 832.605119] WARNING: CPU: 2 PID: 370 at kernel/rcu/tree_plugin.h:318 rcu_note_context_switch+0x4ee/0x690 <snip> [ 832.606453] Call Trace: [ 832.606466] <TASK> [ 832.606487] __schedule+0x9f/0x1480 [ 832.606527] schedule+0x5d/0xe0 [ 832.606549] schedule_timeout+0x79/0x140 [ 832.606572] ? __pfx_process_timeout+0x10/0x10 [ 832.606599] wait_for_completion_timeout+0x6f/0x140 [ 832.606627] i2c_dw_xfer+0x101/0x460 [ 832.606659] ? psi_group_change+0x168/0x400 [ 832.606680] __i2c_transfer+0x172/0x6d0 [ 832.606709] i2c_smbus_xfer_emulated+0x27d/0x9c0 [ 832.606732] ? __schedule+0x430/0x1480 [ 832.606753] ? preempt_count_add+0x6a/0xa0 [ 832.606778] ? get_nohz_timer_target+0x18/0x190 [ 832.606796] ? lock_timer_base+0x61/0x80 [ 832.606817] ? preempt_count_add+0x6a/0xa0 [ 832.606842] __i2c_smbus_xfer+0xa2/0x3f0 [ 832.606862] i2c_smbus_xfer+0x66/0xf0 [ 832.606882] i2c_smbus_read_byte_data+0x41/0x70 [ 832.606901] ? _raw_spin_unlock_irqrestore+0x23/0x40 [ 832.606922] ? __pm_runtime_suspend+0x46/0xc0 [ 832.606946] cht_wc_byte_reg_read+0x2e/0x60 [ 832.606972] _regmap_read+0x5c/0x120 [ 832.606997] _regmap_update_bits+0x96/0xc0 [ 832.607023] regmap_update_bits_base+0x5b/0x90 [ 832.607053] cht_wc_leds_brightness_get+0x412/0x910 [leds_cht_wcove] [ 832.607094] led_blink_setup+0x28/0x100 [ 832.607119] led_trigger_blink+0x40/0x70 [ 832.607145] power_supply_update_leds+0x1b7/0x1c0 [ 832.607174] power_supply_changed_work+0x67/0xe0 [ 832.607198] process_one_work+0x1c8/0x3c0 [ 832.607222] worker_thread+0x4d/0x380 [ 832.607243] ? __pfx_worker_thread+0x10/0x10 [ 832.607258] kthread+0xe9/0x110 [ 832.607279] ? __pfx_kthread+0x10/0x10 [ 832.607300] ret_from_fork+0x2c/0x50 [ 832.607337] </TASK> [ 832.607344] ---[ end trace 0000000000000000 ]--- Add a new led_blink_set_nosleep() function which defers the actual led_blink_set() call to a workqueue when necessary to fix this. This also fixes an existing race where a pending led_set_brightness() has been deferred to set_brightness_work and might then race with a later led_cdev->blink_set() call. Note this race is only an issue with triggers mixing led_trigger_event() and led_trigger_blink() calls, sysfs API calls and led_trigger_blink_oneshot() are not affected. Note rather then adding a separate blink_set_blocking callback this uses the presence of the already existing brightness_set_blocking callback to detect if the blinking call should be deferred to set_brightness_work. Signed-off-by:
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Hans de Goede authored
When a trigger wants to switch from blinking to LED on it needs to call: led_set_brightness(LED_OFF); led_set_brightness(LED_FULL); To first call disables blinking and the second then turns the LED on (the power-supply charging-blink-full-solid triggers do this). These calls happen immediately after each other, so it is possible that set_brightness_delayed() from the first call has not run yet when the led_set_brightness(LED_FULL) call finishes. If this race hits then this is causing problems for both sw- and hw-blinking: For sw-blinking set_brightness_delayed() clears delayed_set_value when LED_BLINK_DISABLE is set causing the led_set_brightness(LED_FULL) call effects to get lost when hitting the race, resulting in the LED turning off instead of on. For hw-blinking if the race hits delayed_set_value has been set to LED_FULL by the time set_brightness_delayed() runs. So led_cdev->brightness_set_blocking() is never called with LED_OFF as argument and the hw-blinking is never disabled leaving the LED blinking instead of on. Fix both issues by adding LED_SET_BRIGHTNESS and LED_SET_BRIGHTNESS_OFF work_flags making this 2 separate actions to be run by set_brightness_delayed(). Signed-off-by:
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Hans de Goede authored
led_blink_set[_oneshot]()'s delay_on and delay_off function parameters are pass by reference, so that hw-blink implementations can report back the actual achieved delays when the values have been rounded to something the hw supports. This is really only interesting for the sysfs API / the timer trigger. Other triggers don't really care about this and none of the callers of led_trigger_blink[_oneshot]() do anything with the returned delay values. Change the led_trigger_blink[_oneshot]() delay parameters to pass-by-value, there are 2 reasons for this: 1. led_cdev->blink_set() may sleep, while led_trigger_blink() may not. So on hw where led_cdev->blink_set() sleeps the call needs to be deferred to a workqueue, in which case the actual achieved delays are unknown (this is a preparation patch for the deferring). 2. Since the callers don't care about the actual achieved delays, allowing callers to directly pass a value leads to simpler code for most callers. Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by:
Sebastian Reichel <sebastian.reichel@collabora.com> Acked-by:
Florian Westphal <fw@strlen.de> Link: https://lore.kernel.org/r/20230510162234.291439-2-hdegoede@redhat.comSigned-off-by:
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Uwe Kleine-König authored
After commit b8a1a4cd ("i2c: Provide a temporary .probe_new() call-back type"), all drivers being converted to .probe_new() and then 03c835f4 ("i2c: Switch .probe() to not take an id parameter") convert back to (the new) .probe() to be able to eventually drop .probe_new() from struct i2c_driver. Signed-off-by:
Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Link: https://lore.kernel.org/r/20230517180559.166329-1-u.kleine-koenig@pengutronix.deSigned-off-by:
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Geert Uytterhoeven authored
Currently, LEDS_LM3697 and LEDS_LM36274 depend on LEDS_TI_LMU_COMMON, which contains the common code to support TI LMU devices. This means the user is asked about the common code first, followed by the individual drivers, if their dependencies are met. Simplify this, and reduce the number of questions by making LEDS_TI_LMU_COMMON invisible, and letting it be selected when needed. Signed-off-by:
Geert Uytterhoeven <geert+renesas@glider.be> Acked-by:
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Dylan Van Assche authored
The Qualcomm PMI8998 PMIC requires the LED to be disabled when configuring the brightness. Always disable the LED when setting the brightness and re-enable it afterwards. Signed-off-by:
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Dylan Van Assche authored
Add subtype for the Qualcomm PMI8998 PMIC to support it besides the PM8150 PMIC which has the same registers. Adjust the driver to recognize both PMIC subtypes as a 3 channel LED driver. Signed-off-by:
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Hans de Goede authored
The desired default behavior of LED1 / the charge LED is breathing while charging and on/solid when full. Since triggers cannot select breathing, blink_set() gets called when charging. Use breathing when the default "charging-blink-full-solid" trigger is used to achieve the desired default behavior. Signed-off-by:
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Hans de Goede authored
Set a default trigger for the charging LED based on the machine-model as set by the PMIC MFD driver. Signed-off-by:
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Hans de Goede authored
The hw-blinking of the LED controller in the Whiskey Cove PMIC can also be used for a hw-breathing effect. As discussed during review of v2 of the submission of the new leds-cht-wcove driver, the LED subsystem already supports breathing mode on several other LED controllers using the hw_pattern interface. Implement a pattern_set callback to implement breathing mode modelled after the breathing mode supported by the SC27xx breathing light and Crane EL15203000 LED drivers. The Whiskey Cove PMIC's breathing mode is closer to the EL15203000 one then to the SC27xx one since it does not support staying high / low for a specific time, it only supports rise and fall times. As such the supported hw_pattern and the documentation for this is almost a 1:1 copy of the pattern/docs for the EL15203000 breathing mode. Suggested-by:
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Hans de Goede authored
When LED1 is showing the tablet is charging and then the device gets suspended followed by unplugging the charger, then it will incorrectly still show it is charging. To avoid this turn both LEDs off on suspend, just like the PMIC always turns them off when the tablet is powered off (even if the tablet is charging). If hw-control is supported for LED1, then restore the initial hw-control settings to let the hw control LED1 while suspended. To restore the state the LEDs had before suspending, save it before turning the LEDs off and restore it on resume. Acked-by:
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Yauhen Kharuzhy authored
Add support for LEDs connected to the Intel Cherry Trail Whiskey Cove PMIC. Charger and general-purpose LEDs are supported. Hardware blinking is implemented, breathing is not. This driver was tested with Lenovo Yoga Book notebook. Changes by Hans de Goede (in response to review of v2): - Since the PMIC is connected to the battery any changes we make to the LED settings are permanent, even surviving reboot / poweroff. Save LED1 register settings on probe() and if auto-/hw-control was enabled on probe() restore the settings on remove() and shutdown(). - Delay switching LED1 to software control mode to first brightness write. - Use dynamically allocated drvdata instead of a global drvdata variable. - Ensure the LED is on when activating blinking. - Fix CHT_WC_LED_EFF_BREATHING val ((3 << 1) rather then BIT(3)). Link: https://lore.kernel.org/r/20190212205901.13037-2-jekhor@gmail.comSigned-off-by:
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Nishanth Menon authored
Commit e91a4d5d ("dt-bindings: leds: Document commonly used LED triggers") introduced a enum match for cpu, while a pattern '^cpu[0-9]*$' already exists. This causes linux,default-trigger = "cpu" to have more than one match and generates the following dtbs_check warning: arch/arm64/boot/dts/ti/k3-j721e-beagleboneai64.dtb: leds: led-2:linux,default-trigger: More than one condition true in oneOf schema: {'$ref': '/schemas/types.yaml#/definitions/string', 'oneOf': [{'items': [{'enum': ['backlight', 'default-on', 'heartbeat', 'disk-activity', 'disk-read', 'disk-write', 'timer', 'pattern', 'audio-micmute', 'audio-mute', 'bluetooth-power', 'cpu', 'flash', 'kbd-capslock', 'mtd', 'nand-disk', 'none', 'torch', 'usb-gadget', 'usb-host', 'usbport']}], 'maxItems': 1, 'minItems': 1, 'type': 'array'}, {'items': [{'pattern': '^cpu[0-9]*$'}], 'maxItems': 1, 'minItems': 1, 'type': 'array'}, {'items': [{'pattern': '^hci[0-9]+-power$'}], 'maxItems': 1, 'minItems': 1, 'type': 'array'}, {'items': [{'pattern': '^mmc[0-9]+$'}], 'maxItems': 1, 'minItems': 1, 'type': 'array'}, {'items': [{'pattern': '^phy[0-9]+tx$'}], 'maxItems': 1, 'minItems': 1, 'type': 'array'}]} Drop the explicit match against cpu since the pattern match already covers the same. Fixes: e91a4d5d ("dt-bindings: leds: Document commonly used LED triggers") Signed-off-by:
Nishanth Menon <nm@ti.com> Acked-by:
Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Acked-by:
Rob Herring <robh@kernel.org> Signed-off-by:
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Luca Weiss authored
Document support for the pmi632, often found with the sdm632 SoC. Signed-off-by:
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Luca Weiss authored
The PMI632 PMIC contains 5 PWM channels, 3 of which can be used for LEDs. For the LED pattern it doesn't have LUT like other PMICs but uses SDAM instead. This is not currently implemented in the driver but since LPG works fine without it, add support for the PMIC now. Signed-off-by:
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Luca Weiss authored
Document the availability of an LPG configuration for the PMI632 PMIC in the Qualcomm Light Pulse Generator driver. Signed-off-by:
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Maarten Zanders authored
The LP55xx range of devices have an internal charge pump which can (automatically) increase the output voltage towards the LED's, boosting the output voltage to 4.5V. Implement this option from the devicetree. When the setting is not present it will operate in automatic mode as before. Tested on LP55231. Datasheet analysis shows that LP5521, LP5523 and LP8501 are identical in topology and are modified in the same way. Signed-off-by:
Maarten Zanders <maarten.zanders@mind.be> Signed-off-by:
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Maarten Zanders authored
Add a binding to configure the internal charge pump for lp55xx. Signed-off-by:
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Christian Marangi authored
Some LEDs may require to sleep while doing some operation like setting brightness and other cleanup. For this reason, using a spinlock will cause a sleep under spinlock warning. It should be safe to convert this to a sleepable lock since: - sysfs read/write can sleep - netdev_trig_work is a work queue and can sleep - netdev _trig_notify can sleep The spinlock was used when brightness didn't support sleeping, but this changed and now it supported with brightness_set_blocking(). Convert to mutex lock to permit sleeping using brightness_set_blocking(). Signed-off-by:
Christian Marangi <ansuelsmth@gmail.com> Reviewed-by:
Andrew Lunn <andrew@lunn.ch> Signed-off-by:
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