From: Dan Murphy <dmurphy@ti.com>
To: Jacek Anaszewski <jacek.anaszewski@gmail.com>,
robh+dt@kernel.org, pavel@ucw.cz
Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-leds@vger.kernel.org
Subject: Re: [PATCH 1/2] dt: bindings: lp5024: Introduce the lp5024 and lp5018 RGB driver
Date: Tue, 8 Jan 2019 15:22:10 -0600 [thread overview]
Message-ID: <366cbf6d-94fa-fea9-be58-07ddb09cff3a@ti.com> (raw)
In-Reply-To: <6c62956e-7789-58ba-5437-f2e033f2825c@gmail.com>
On 1/8/19 3:16 PM, Jacek Anaszewski wrote:
> On 1/8/19 9:53 PM, Dan Murphy wrote:
>> Jacek
>>
>> On 1/8/19 2:33 PM, Jacek Anaszewski wrote:
>>> Dan,
>>>
>>> On 12/19/18 5:26 PM, Dan Murphy wrote:
>>>> Introduce the bindings for the Texas Instruments LP5024 and the LP5018
>>>> RGB LED device driver. The LP5024/18 can control RGB LEDs individually
>>>> or as part of a control bank group. These devices have the ability
>>>> to adjust the mixing control for the RGB LEDs to obtain different colors
>>>> independent of the overall brightness of the LED grouping.
>>>>
>>>> Datasheet:
>>>> http://www.ti.com/lit/ds/symlink/lp5024.pdf
>>>>
>>>> Signed-off-by: Dan Murphy <dmurphy@ti.com>
>>>> ---
>>>> .../devicetree/bindings/leds/leds-lp5024.txt | 63 +++++++++++++++++++
>>>> 1 file changed, 63 insertions(+)
>>>> create mode 100644 Documentation/devicetree/bindings/leds/leds-lp5024.txt
>>>>
>>>> diff --git a/Documentation/devicetree/bindings/leds/leds-lp5024.txt b/Documentation/devicetree/bindings/leds/leds-lp5024.txt
>>>> new file mode 100644
>>>> index 000000000000..9567aa6f7813
>>>> --- /dev/null
>>>> +++ b/Documentation/devicetree/bindings/leds/leds-lp5024.txt
>>>> @@ -0,0 +1,63 @@
>>>> +* Texas Instruments - LP5024/18 RGB LED driver
>>>> +
>>>> +The LM3692x is an ultra-compact, highly efficient,
>>>> +white-LED driver designed for LCD display backlighting.
>>>> +
>>>> +The main difference between the LP5024 and L5018 is the number of
>>>> +RGB LEDs they support. The LP5024 supports twenty four strings while the
>>>> +LP5018 supports eighteen strings.
>>>> +
>>>> +Required properties:
>>>> + - compatible:
>>>> + "ti,lp5018"
>>>> + "ti,lp5024"
>>>> + - reg : I2C slave address
>>>> + - #address-cells : 1
>>>> + - #size-cells : 0
>>>> +
>>>> +Optional properties:
>>>> + - enable-gpios : gpio pin to enable/disable the device.
>>>> + - vled-supply : LED supply
>>>> +
>>>> +Required child properties:
>>>> + - reg : Is the child node iteration.
>>>> + - led-sources : LP5024 - 0 - 7
>>>> + LP5018 - 0 - 5
>>>> + Declares the LED string or strings that the child node
>>>> + will control. If ti,control-bank is set then this
>>>> + property will contain multiple LED IDs.
>>>> +
>>>> +Optional child properties:
>>>> + - label : see Documentation/devicetree/bindings/leds/common.txt
>>>> + - linux,default-trigger :
>>>> + see Documentation/devicetree/bindings/leds/common.txt
>>>> + - ti,control-bank : Indicates that the LED strings declared in the
>>>> + led-sources property are grouped within a control
>>>> + bank for brightness and mixing control.
>>>> +
>>>> +Example:
>>>> +
>>>> +led-controller@28 {
>>>> + compatible = "ti,lp5024";
>>>> + reg = <0x28>;
>>>> + #address-cells = <1>;
>>>> + #size-cells = <0>;
>>>> +
>>>> + enable-gpios = <&gpio1 28 GPIO_ACTIVE_HIGH>;
>>>> + vled-supply = <&vbatt>;
>>>> +
>>>> + led@0 {
>>>> + reg = <0>;
>>>> + led-sources = <1>;
>>>> + };
>>>> +
>>>> + led@1 {
>>>> + reg = <1>;
>>>> + led-sources = <0 6>;
>>>> + ti,control-bank;
>>>
>>> Do you really need ti,control-bank? Doesn't led-sources array size
>>> greater than 1 mean that the node describes control bank?
>>>
>>
>> That will work too.
>
>>> Also, does it make sense to have only two LEDs in the bank?
>>
>> The array can populate all 7 LEDs in a single node. I only show 2 here as the example.
>> See the description above of the led-sources
>
> OK, I confused RGB LED modules with banks.
>
> Shouldn't we allow for defining either strings or RGB LED
> triplets somehow then?
>
Well that is what this should be doing. If you define a single LED in LED sources then
the triplet is controlled via the associated LEDx_brightness register.
If you have multiple LED sources defined in the led-sources then those LEDs would be grouped in the bank.
I guess I need to provide some protection or a warning if a DT defines two banks because there is only one bank control.
Dan
--
------------------
Dan Murphy
next prev parent reply other threads:[~2019-01-08 21:22 UTC|newest]
Thread overview: 106+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-19 16:26 [PATCH 0/2] LP5024/18 LED introduction Dan Murphy
2018-12-19 16:26 ` [PATCH 1/2] dt: bindings: lp5024: Introduce the lp5024 and lp5018 RGB driver Dan Murphy
2018-12-28 23:53 ` Rob Herring
2018-12-31 18:54 ` Dan Murphy
2019-01-08 20:33 ` Jacek Anaszewski
2019-01-08 20:53 ` Dan Murphy
2019-01-08 21:16 ` Jacek Anaszewski
2019-01-08 21:22 ` Dan Murphy [this message]
2019-01-09 20:12 ` Jacek Anaszewski
2019-01-09 21:12 ` Dan Murphy
2019-01-09 21:28 ` Jacek Anaszewski
2019-01-09 21:31 ` Dan Murphy
2019-01-10 18:44 ` Jacek Anaszewski
2019-01-10 19:22 ` Dan Murphy
2019-01-10 19:57 ` Jacek Anaszewski
2019-01-10 20:43 ` Dan Murphy
2019-01-10 22:03 ` Jacek Anaszewski
2019-01-10 23:51 ` Dan Murphy
2019-01-11 12:38 ` Dan Murphy
2019-01-11 21:52 ` Jacek Anaszewski
2019-01-12 17:09 ` Dan Murphy
2019-01-12 19:48 ` Jacek Anaszewski
2019-01-14 12:27 ` Dan Murphy
2019-01-14 20:11 ` Jacek Anaszewski
2019-01-14 20:14 ` Dan Murphy
2019-01-14 20:28 ` Jacek Anaszewski
2019-01-14 20:29 ` Dan Murphy
2018-12-19 16:26 ` [PATCH 2/2] leds: lp5024: Add the LP5024/18 RGB LED driver Dan Murphy
2018-12-19 19:04 ` Dan Murphy
2018-12-19 19:34 ` Pavel Machek
2018-12-19 19:41 ` Dan Murphy
2018-12-19 20:10 ` Pavel Machek
2018-12-19 20:41 ` Dan Murphy
2018-12-19 21:36 ` Jacek Anaszewski
2018-12-19 21:50 ` Dan Murphy
2018-12-20 12:40 ` Vesa Jääskeläinen
2018-12-20 13:56 ` Dan Murphy
2019-01-01 13:45 ` Vesa Jääskeläinen
2019-01-03 22:05 ` Jacek Anaszewski
2019-01-03 23:19 ` Vesa Jääskeläinen
2019-01-03 23:34 ` Pavel Machek
2019-01-04 19:49 ` Vesa Jääskeläinen
2019-01-04 20:43 ` Pavel Machek
2019-01-04 19:12 ` Jacek Anaszewski
2019-01-04 20:12 ` Pavel Machek
2019-01-04 21:37 ` Jacek Anaszewski
2019-01-04 22:07 ` Pavel Machek
2019-01-05 12:16 ` Jacek Anaszewski
2019-01-05 12:31 ` Pavel Machek
2019-01-05 13:16 ` Jacek Anaszewski
2019-01-05 22:12 ` Generic RGB LED support was " Pavel Machek
2019-01-06 15:52 ` Jacek Anaszewski
2019-01-07 19:13 ` Jacek Anaszewski
2019-01-07 19:36 ` Dan Murphy
2019-01-07 20:59 ` Jacek Anaszewski
2019-01-07 21:14 ` Dan Murphy
2019-01-08 21:18 ` Jacek Anaszewski
2019-01-08 21:25 ` Dan Murphy
2019-01-10 12:46 ` Dan Murphy
2019-01-10 19:23 ` Jacek Anaszewski
2019-01-10 19:58 ` Dan Murphy
2019-01-10 21:02 ` Jacek Anaszewski
2019-01-10 21:07 ` Dan Murphy
2019-01-08 22:59 ` Pavel Machek
2019-01-09 7:11 ` Vesa Jääskeläinen
2019-01-13 16:37 ` Jacek Anaszewski
2019-01-05 0:39 ` Vesa Jääskeläinen
2019-01-07 19:34 ` Dan Murphy
2019-01-09 6:20 ` Vesa Jääskeläinen
2019-01-07 21:13 ` Jacek Anaszewski
2019-01-07 21:15 ` Dan Murphy
2019-01-09 6:46 ` Vesa Jääskeläinen
2019-01-13 16:36 ` Jacek Anaszewski
2018-12-20 20:31 ` Jacek Anaszewski
2018-12-21 7:32 ` Jacek Anaszewski
2018-12-21 13:05 ` Dan Murphy
2018-12-29 18:28 ` Jacek Anaszewski
2018-12-29 19:07 ` Pavel Machek
2018-12-30 17:09 ` Jacek Anaszewski
2018-12-30 17:35 ` Pavel Machek
2018-12-31 15:43 ` Jacek Anaszewski
2018-12-31 15:47 ` Jacek Anaszewski
2018-12-31 19:15 ` Dan Murphy
2019-01-01 14:42 ` Jacek Anaszewski
2019-01-01 18:11 ` Dan Murphy
2019-01-01 22:06 ` Jacek Anaszewski
2018-12-31 16:28 ` Pavel Machek
2019-01-01 14:26 ` Jacek Anaszewski
2018-12-19 22:03 ` Pavel Machek
2018-12-19 22:08 ` Dan Murphy
2018-12-19 22:27 ` Pavel Machek
2018-12-20 1:31 ` Dan Murphy
2018-12-20 9:06 ` Pavel Machek
2018-12-20 14:03 ` Dan Murphy
2019-01-08 21:10 ` Jacek Anaszewski
2019-01-08 21:17 ` Dan Murphy
2019-07-22 20:59 ` Backlight in motorola Droid 4 Pavel Machek
2019-07-23 15:53 ` Dan Murphy
2019-07-24 8:22 ` Pavel Machek
2019-07-24 12:45 ` Pavel Machek
2019-07-24 15:10 ` Dan Murphy
2019-07-24 15:22 ` Dan Murphy
2019-07-26 14:38 ` Dan Murphy
2019-07-29 22:00 ` Pavel Machek
2019-07-30 18:21 ` Dan Murphy
2019-07-30 21:52 ` Pavel Machek
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