On 2018-05-17 18:01, Rob Herring wrote:
Thanks for pointing it ! hope I can use "qcom,current-limit-microamp" and "qcom,ovp-millivolt". I am asking this because i found only "-microvolt".On Thu, May 17, 2018 at 4:47 AM, <kgu...@codeaurora.org> wrote:On 2018-05-08 15:55, kgu...@codeaurora.org wrote:On 2018-05-07 21:50, Bjorn Andersson wrote:On Thu 03 May 02:57 PDT 2018, Kiran Gunda wrote:WLED4 peripheral is present on some PMICs like pmi8998 and pm660l. It has a different register map and also configurations are different. Add support for it.Several things are going on in this patch, it needs to be split to not hide the functional changes from the structural/renames.Ok. I will split it in the next series.Signed-off-by: Kiran Gunda <kgu...@codeaurora.org> --- .../bindings/leds/backlight/qcom-wled.txt | 172 ++++- drivers/video/backlight/qcom-wled.c | 749 +++++++++++++++------ 2 files changed, 696 insertions(+), 225 deletions(-) diff --git a/Documentation/devicetree/bindings/leds/backlight/qcom-wled.txt b/Documentation/devicetree/bindings/leds/backlight/qcom-wled.txt index fb39e32..0ceffa1 100644--- a/Documentation/devicetree/bindings/leds/backlight/qcom-wled.txt +++ b/Documentation/devicetree/bindings/leds/backlight/qcom-wled.txt@@ -1,30 +1,129 @@ Binding for Qualcomm Technologies, Inc. WLED driver -Required properties: -- compatible: should be "qcom,pm8941-wled" -- reg: slave address - -Optional properties: -- default-brightness: brightness value on boot, value from: 0-4095 - default: 2048 -- label: The name of the backlight device -- qcom,cs-out: bool; enable current sink output -- qcom,cabc: bool; enable content adaptive backlight control-- qcom,ext-gen: bool; use externally generated modulator signal to dim -- qcom,current-limit: mA; per-string current limit; value from 0 to 25- default: 20mA -- qcom,current-boost-limit: mA; boost current limit; one of: - 105, 385, 525, 805, 980, 1260, 1400, 1680 - default: 805mA -- qcom,switching-freq: kHz; switching frequency; one of: - 600, 640, 685, 738, 800, 872, 960, 1066, 1200, 1371, - 1600, 1920, 2400, 3200, 4800, 9600, - default: 1600kHz -- qcom,ovp: V; Over-voltage protection limit; one of: - 27, 29, 32, 35 - default: 29V-- qcom,num-strings: #; number of led strings attached; value from 1 to3 - default: 2 +WLED (White Light Emitting Diode) driver is used for controlling display+backlight that is part of PMIC on Qualcomm Technologies, Inc. reference +platforms. The PMIC is connected to the host processor via SPMI bus.+ +- compatible + Usage: required + Value type: <string> + Definition: should be "qcom,pm8941-wled" or "qcom,pmi8998-wled". + or "qcom,pm660l-wled".Better written as should be one of: X Y ZWill do it in the next series.+ +- reg + Usage: required + Value type: <prop encoded array> + Definition: Base address of the WLED modules. + +- interrupts + Usage: optional + Value type: <prop encoded array>+ Definition: Interrupts associated with WLED. Interrupts can be+ specified as per the encoding listed under + Documentation/devicetree/bindings/spmi/ + qcom,spmi-pmic-arb.txt.Better to describe that this should be the "short" and "ovp" interruptsin this property than in the interrupt-names.Ok. I will do it in the next series.+ +- interrupt-names + Usage: optional + Value type: <string>+ Definition: Interrupt names associated with the interrupts.+ Must be "short" and "ovp". The short circuit detection + is not supported for PM8941. + +- label + Usage: required + Value type: <string> + Definition: The name of the backlight device + +- default-brightness + Usage: optional + Value type: <u32> + Definition: brightness value on boot, value from: 0-4095 + Default: 2048 + +- qcom,current-limit + Usage: optional + Value type: <u32> + Definition: uA; per-string current limitYou can't change unit on an existing property, that breaks any existingdts using the qcom,pm8941-wled compatible.+ value: + For pm8941: from 0 to 25000 with 5000 ua step + Default 20000 uA+ For pmi8998: from 0 to 30000 with 5000 ua step+ Default 25000 uA.These values could be described just as well in mA, so keep the originalunit - in particular since the boot-limit is in mA...Ok. Will keep the original as is in the next series.Here, I may have to go with the approach as in "qcom,ovp". Because for pm8941the current step is 1 mA (I have wrongly mentioned as 5000uA here) and forPMI8998 the current step is 2.5 mA. Hence, I will add another variable "qcom,current-limit-ua" just like "qcom,ovp-mv".Use unit suffixes defined in bindings/property-units.txt. Rob --To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" inthe body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
"-millivolt" is not present in the bindings you pointed.