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path: root/drivers/leds/leds-lm3692x.c
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2020-07-22leds: Replace HTTP links with HTTPS onesAlexander A. Klimov1-1/+1
Rationale: Reduces attack surface on kernel devs opening the links for MITM as HTTPS traffic is much harder to manipulate. Deterministic algorithm: For each file: If not .svg: For each line: If doesn't contain `\bxmlns\b`: For each link, `\bhttp://[^# \t\r\n]*(?:\w|/)`: If neither `\bgnu\.org/license`, nor `\bmozilla\.org/MPL\b`: If both the HTTP and HTTPS versions return 200 OK and serve the same content: Replace HTTP with HTTPS. Signed-off-by: Alexander A. Klimov <grandmaster@al2klimov.de> Acked-by: Rob Herring <robh@kernel.org> Acked-by: Dan Murphy <dmurphy@ti.com> Signed-off-by: Pavel Machek <pavel@ucw.cz>
2020-01-07leds: lm3692x: Disable chip on brightness 0Guido Günther1-1/+17
Otherwise there's a noticeable glow even with brightness 0. Also turning off the regulator can save additional power. Signed-off-by: Guido Günther <agx@sigxcpu.org> Signed-off-by: Pavel Machek <pavel@ucw.cz>
2020-01-07leds: lm3692x: Split out lm3692x_leds_disableGuido Günther1-16/+26
Move the relevant parts out of lm3692x_remove() and call it from there. No functional change. Signed-off-by: Guido Günther <agx@sigxcpu.org> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Pavel Machek <pavel@ucw.cz>
2020-01-07leds: lm3692x: Move lm3692x_init and rename to lm3692x_leds_enableGuido Günther1-35/+35
This moves lm3692x_init so it can be used from lm3692x_brightness_set. Rename to lm3692_leds_enable to pair up with lm3692x_leds_disable. No functional change. Signed-off-by: Guido Günther <agx@sigxcpu.org> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Pavel Machek <pavel@ucw.cz>
2020-01-07leds: lm3692x: Make sure we don't exceed the maximum LED currentGuido Günther1-1/+19
The current is given by the formular from page 12 of https://www.ti.com/lit/ds/symlink/lm36922.pdf. We use this to limit the led's max_brightness using the led-max-microamp DT property. The formula for the lm36923 is identical according to the data sheet. Signed-off-by: Guido Günther <agx@sigxcpu.org> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Pavel Machek <pavel@ucw.cz>
2020-01-06leds: lm3692x: Allow to configure over voltage protectionGuido Günther1-4/+30
Overvoltage protection is currently using the default of 29V. Make it configurable via DT. Signed-off-by: Guido Günther <agx@sigxcpu.org> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Pavel Machek <pavel@ucw.cz>
2019-11-03leds: lm3692x: Use flags from LM3692X_BRT_CTRLGuido Günther1-1/+1
Use LM3692X_RAMP_EN instead of LM3692X_PWM_HYSTER_4LSB since the later is a flag for the PWM register. The actual register value remains unchanged. Signed-off-by: Guido Günther <agx@sigxcpu.org> Reviewed-by: Dan Murphy <dmurphy@ti.com> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Pavel Machek <pavel@ucw.cz>
2019-11-03leds: lm3692x: Use flags from LM3692X_BOOST_CTRLGuido Günther1-3/+3
The current setup of LM3692X_BOOST_CTRL uses flags from LM3692X_BRT_CTRL. Use flags from LM3692X_BOOST_CTRL but leave the resulting register value unchanged. Signed-off-by: Guido Günther <agx@sigxcpu.org> Reviewed-by: Dan Murphy <dmurphy@ti.com> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Pavel Machek <pavel@ucw.cz>
2019-11-03leds: lm3692x: Handle failure to probe the regulatorGuido Günther1-2/+11
Instead use devm_regulator_get_optional since the regulator is optional and check for errors. Signed-off-by: Guido Günther <agx@sigxcpu.org> Acked-by: Pavel Machek <pavel@ucw.cz> Reviewed-by: Dan Murphy <dmurphy@ti.com> Signed-off-by: Pavel Machek <pavel@ucw.cz>
2019-11-03leds: lm3692x: Don't overwrite return value in error pathGuido Günther1-4/+5
The driver currently reports successful initialization on every failure as long as it's able to power off the regulator. Don't check the return value of regulator_disable to avoid that. Signed-off-by: Guido Günther <agx@sigxcpu.org> Acked-by: Pavel Machek <pavel@ucw.cz> Reviewed-by: Dan Murphy <dmurphy@ti.com> Signed-off-by: Pavel Machek <pavel@ucw.cz>
2019-11-03leds: lm3692x: Print error value on dev_errGuido Günther1-7/+10
This gives a way better idea what is going on. Signed-off-by: Guido Günther <agx@sigxcpu.org> Reviewed-by: Dan Murphy <dmurphy@ti.com> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Pavel Machek <pavel@ucw.cz>
2019-07-25leds: lm3692x: Use generic support for composing LED namesJacek Anaszewski1-16/+6
Switch to using generic LED support for composing LED class device name. At this occassion remove initialization of struct led_classdev's dev->of_node property in the driver, since now it will be taken from fwnode assigned to struct led_init_data and passed to the new devm_led_classdev_register_ext() API. Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com> Tested-by: Dan Murphy <dmurphy@ti.com> Acked-by: Pavel Machek <pavel@ucw.cz>
2018-07-03leds: lm3692x: Support LED sync configurationDan Murphy1-38/+120
The LM36922 has one output but can sync current to 2 LED strings. The user may only use one sync so the other syncs need to be disabled. The LM36923 has 3 LED syncs. Signed-off-by: Dan Murphy <dmurphy@ti.com> Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
2018-07-03leds: lm3692x: Change DT calls to fwnode callsDan Murphy1-17/+21
Update the code to use the fwnode calls as opposed to ARM DT node api's. This allows the device to be used with either DT configurations or ACPI definitions. Signed-off-by: Dan Murphy <dmurphy@ti.com> Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
2018-07-03leds: lm3692x: Update license header to SPDXDan Murphy1-14/+3
Update the license header to the current SPDX licensing format. Signed-off-by: Dan Murphy <dmurphy@ti.com> Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
2018-01-08leds: lm3692x: Introduce LM3692x dual string driverDan Murphy1-0/+393
Introducing the LM3692x Dual-String white LED driver. Data sheet is located http://www.ti.com/lit/ds/snvsa29/snvsa29.pdf Signed-off-by: Dan Murphy <dmurphy@ti.com> Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
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