cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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leds-aat1290.txt (2924B)

      1* Skyworks Solutions, Inc. AAT1290 Current Regulator for Flash LEDs
      2
      3The device is controlled through two pins: FL_EN and EN_SET. The pins when,
      4asserted high, enable flash strobe and movie mode (max 1/2 of flash current)
      5respectively. In order to add a capability of selecting the strobe signal source
      6(e.g. CPU or camera sensor) there is an additional switch required, independent
      7of the flash chip. The switch is controlled with pin control.
      8
      9Required properties:
     10
     11- compatible : Must be "skyworks,aat1290".
     12- flen-gpios : Must be device tree identifier of the flash device FL_EN pin.
     13- enset-gpios : Must be device tree identifier of the flash device EN_SET pin.
     14
     15Optional properties:
     16- pinctrl-names : Must contain entries: "default", "host", "isp". Entries
     17		"default" and "host" must refer to the same pin configuration
     18		node, which sets the host as a strobe signal provider. Entry
     19		"isp" must refer to the pin configuration node, which sets the
     20		ISP as a strobe signal provider.
     21
     22A discrete LED element connected to the device must be represented by a child
     23node - see Documentation/devicetree/bindings/leds/common.txt.
     24
     25Required properties of the LED child node:
     26- led-max-microamp : see Documentation/devicetree/bindings/leds/common.txt
     27- flash-max-microamp : see Documentation/devicetree/bindings/leds/common.txt
     28                       Maximum flash LED supply current can be calculated using
     29                       following formula: I = 1A * 162kohm / Rset.
     30- flash-max-timeout-us : see Documentation/devicetree/bindings/leds/common.txt
     31                         Maximum flash timeout can be calculated using following
     32                         formula: T = 8.82 * 10^9 * Ct.
     33
     34Optional properties of the LED child node:
     35- function : see Documentation/devicetree/bindings/leds/common.txt
     36- color : see Documentation/devicetree/bindings/leds/common.txt
     37- label : see Documentation/devicetree/bindings/leds/common.txt (deprecated)
     38
     39Example (by Ct = 220nF, Rset = 160kohm and exynos4412-trats2 board with
     40a switch that allows for routing strobe signal either from the host or from
     41the camera sensor):
     42
     43#include "exynos4412.dtsi"
     44#include <dt-bindings/leds/common.h>
     45
     46led-controller {
     47	compatible = "skyworks,aat1290";
     48	flen-gpios = <&gpj1 1 GPIO_ACTIVE_HIGH>;
     49	enset-gpios = <&gpj1 2 GPIO_ACTIVE_HIGH>;
     50
     51	pinctrl-names = "default", "host", "isp";
     52	pinctrl-0 = <&camera_flash_host>;
     53	pinctrl-1 = <&camera_flash_host>;
     54	pinctrl-2 = <&camera_flash_isp>;
     55
     56	camera_flash: led {
     57		function = LED_FUNCTION_FLASH;
     58		color = <LED_COLOR_ID_WHITE>;
     59		led-max-microamp = <520833>;
     60		flash-max-microamp = <1012500>;
     61		flash-max-timeout-us = <1940000>;
     62	};
     63};
     64
     65&pinctrl_0 {
     66	camera_flash_host: camera-flash-host {
     67		samsung,pins = "gpj1-0";
     68		samsung,pin-function = <1>;
     69		samsung,pin-val = <0>;
     70	};
     71
     72	camera_flash_isp: camera-flash-isp {
     73		samsung,pins = "gpj1-0";
     74		samsung,pin-function = <1>;
     75		samsung,pin-val = <1>;
     76	};
     77};