target/linux/brcm2708/patches-4.14/950-0218-Generic-Rotary-Encoder-overlay-for-multiple-instance.patch

   1 From d61d506099a7e3dc2823927c89ac56478ef9f3a5 Mon Sep 17 00:00:00 2001
   2 From: Ismael Asensio <isma.af@gmail.com>
   3 Date: Sun, 18 Feb 2018 18:53:58 +0100
   4 Subject: [PATCH 218/454] Generic Rotary Encoder overlay for multiple instances
   5  (#2388)
   6
   7 Modify the rotary-encoder overlay to support multiple instances.
   8 ---
   9  arch/arm/boot/dts/overlays/README             |  4 +-
  10  .../dts/overlays/rotary-encoder-overlay.dts   | 54 +++++++++++--------
  11  2 files changed, 33 insertions(+), 25 deletions(-)
  12
  13 --- a/arch/arm/boot/dts/overlays/README
  14 +++ b/arch/arm/boot/dts/overlays/README
  15 @@ -1345,9 +1345,9 @@ Params: <None>
  16  Name:   rotary-encoder
  17  Info:   Overlay for GPIO connected rotary encoder.
  18  Load:   dtoverlay=rotary-encoder,<param>=<val>
  19 -Params: rotary0_pin_a           GPIO connected to rotary encoder channel A
  20 +Params: pin_a                   GPIO connected to rotary encoder channel A
  21                                  (default 4).
  22 -        rotary0_pin_b           GPIO connected to rotary encoder channel B
  23 +        pin_b                   GPIO connected to rotary encoder channel B
  24                                  (default 17).
  25          relative_axis           register a relative axis rather than an
  26                                  absolute one. Relative axis will only
  27 --- a/arch/arm/boot/dts/overlays/rotary-encoder-overlay.dts
  28 +++ b/arch/arm/boot/dts/overlays/rotary-encoder-overlay.dts
  29 @@ -8,7 +8,7 @@
  30         fragment@0 {
  31                 target = <&gpio>;
  32                 __overlay__ {
  33 -                       rotary0_pins: rotary0_pins {
  34 +                       rotary_pins: rotary_pins@4 {
  35                                 brcm,pins = <4 17>; /* gpio 4 17 */
  36                                 brcm,function = <0 0>; /* input */
  37                                 brcm,pull = <2 2>; /* pull-up */
  38 @@ -20,32 +20,40 @@
  39         fragment@1 {
  40                 target-path = "/";
  41                 __overlay__ {
  42 -                       rotary0: rotary@0 {
  43 -                                       compatible = "rotary-encoder";
  44 -                                       status = "okay";
  45 -                                       pinctrl-names = "default";
  46 -                                       pinctrl-0 = <&rotary0_pins>;
  47 -                                       gpios = <&gpio 4 0>, <&gpio 17 0>;
  48 -                                       linux,axis = <0>; /* REL_X */
  49 -                                       rotary-encoder,encoding = "gray";
  50 -                                       rotary-encoder,steps = <24>; /* 24 default */
  51 -                                       rotary-encoder,steps-per-period = <1>; /* corresponds to full period mode. See README */
  52 +                       rotary: rotary@4 {
  53 +                               compatible = "rotary-encoder";
  54 +                               status = "okay";
  55 +                               pinctrl-names = "default";
  56 +                               pinctrl-0 = <&rotary_pins>;
  57 +                               gpios = <&gpio 4 0>, <&gpio 17 0>;
  58 +                               linux,axis = <0>; /* REL_X */
  59 +                               rotary-encoder,encoding = "gray";
  60 +                               rotary-encoder,steps = <24>; /* 24 default */
  61 +                               rotary-encoder,steps-per-period = <1>; /* corresponds to full period mode. See README */
  62                         };
  63                 };
  64
  65         };
  66
  67         __overrides__ {
  68 -               rotary0_pin_a =     <&rotary0>,"gpios:4",
  69 -                                   <&rotary0_pins>,"brcm,pins:0";
  70 -               rotary0_pin_b =     <&rotary0>,"gpios:16",
  71 -                                   <&rotary0_pins>,"brcm,pins:4";
  72 -               relative_axis =     <&rotary0>,"rotary-encoder,relative-axis?";
  73 -               linux_axis =        <&rotary0>,"linux,axis:0";
  74 -               rollover =          <&rotary0>,"rotary-encoder,rollover?";
  75 -               steps-per-period =  <&rotary0>,"rotary-encoder,steps-per-period:0";
  76 -               steps =             <&rotary0>,"rotary-encoder,steps:0";
  77 -               wakeup =            <&rotary0>,"wakeup-source?";
  78 -               encoding =          <&rotary0>,"rotary-encoder,encoding";
  79 -       };
  80 +               pin_a =             <&rotary>,"gpios:4",
  81 +                                   <&rotary_pins>,"brcm,pins:0",
  82 +                                   /* modify reg values to allow multiple instantiation */
  83 +                                   <&rotary>,"reg:0",
  84 +                                   <&rotary_pins>,"reg:0";
  85 +               pin_b =             <&rotary>,"gpios:16",
  86 +                                   <&rotary_pins>,"brcm,pins:4";
  87 +               relative_axis =     <&rotary>,"rotary-encoder,relative-axis?";
  88 +               linux_axis =        <&rotary>,"linux,axis:0";
  89 +               rollover =          <&rotary>,"rotary-encoder,rollover?";
  90 +               steps-per-period =  <&rotary>,"rotary-encoder,steps-per-period:0";
  91 +               steps =             <&rotary>,"rotary-encoder,steps:0";
  92 +               wakeup =            <&rotary>,"wakeup-source?";
  93 +               encoding =          <&rotary>,"rotary-encoder,encoding";
  94 +                /* legacy parameters*/
  95 +               rotary0_pin_a =     <&rotary>,"gpios:4",
  96 +                                   <&rotary_pins>,"brcm,pins:0";
  97 +               rotary0_pin_b =     <&rotary>,"gpios:16",
  98 +                                   <&rotary_pins>,"brcm,pins:4";
  99 +       };
 100  };