git.openwrt.org Git - openwrt/staging/jow.git/blob

   1 From 3ed57f25f3074f6abfe570fc11aa7d370fdc499a Mon Sep 17 00:00:00 2001
   2 From: Nick Hollinghurst <nick.hollinghurst@raspberrypi.com>
   3 Date: Wed, 6 Dec 2023 14:38:03 +0000
   4 Subject: [PATCH] overlays: Add "always-on" parameter to imx477 and imx296
   5
   6 Leave the camera's power supplies up, to prevent the camera
   7 clamping its 1.8V digital I/Os to ground. This may be useful
   8 when synchronizing multiple camera systems using XVS or XTRIG.
   9
  10 Signed-off-by: Nick Hollinghurst <nick.hollinghurst@raspberrypi.com>
  11 ---
  12  arch/arm/boot/dts/overlays/README                  | 6 ++++++
  13  arch/arm/boot/dts/overlays/imx296-overlay.dts      | 9 +++++++++
  14  arch/arm/boot/dts/overlays/imx477_378-overlay.dtsi | 9 +++++++++
  15  3 files changed, 24 insertions(+)
  16
  17 --- a/arch/arm/boot/dts/overlays/README
  18 +++ b/arch/arm/boot/dts/overlays/README
  19 @@ -2520,6 +2520,8 @@ Params: rotation                Mounting
  20          clock-frequency         Sets the clock frequency to match that used on
  21                                  the board, which should be one of 54000000
  22                                  (the default), 37125000 or 74250000.
  23 +        always-on               Leave the regulator powered up, to stop the
  24 +                                camera clamping I/Os such as XTRIG to 0V.
  25
  26
  27  Name:   imx327
  28 @@ -2558,6 +2560,8 @@ Params: rotation                Mounting
  29                                  configuring the sensor (default on)
  30          cam0                    Adopt the default configuration for CAM0 on a
  31                                  Compute Module (CSI0, i2c_vc, and cam0_reg).
  32 +        always-on               Leave the regulator powered up, to stop the
  33 +                                camera clamping I/Os such as XVS to 0V.
  34
  35
  36  Name:   imx462
  37 @@ -2596,6 +2600,8 @@ Params: rotation                Mounting
  38                                  configuring the sensor (default on)
  39          cam0                    Adopt the default configuration for CAM0 on a
  40                                  Compute Module (CSI0, i2c_vc, and cam0_reg).
  41 +        always-on               Leave the regulator powered up, to stop the
  42 +                                camera clamping I/Os such as XVS to 0V.
  43
  44
  45  Name:   imx519
  46 --- a/arch/arm/boot/dts/overlays/imx296-overlay.dts
  47 +++ b/arch/arm/boot/dts/overlays/imx296-overlay.dts
  48 @@ -37,6 +37,13 @@
  49                 };
  50         };
  51
  52 +       reg_alwayson_frag: fragment@99 {
  53 +               target = <&cam1_reg>;
  54 +               __dormant__ {
  55 +                       regulator-always-on;
  56 +               };
  57 +       };
  58 +
  59         i2c_frag: fragment@100 {
  60                 target = <&i2c_csi_dsi>;
  61                 __overlay__ {
  62 @@ -98,8 +105,10 @@
  63                        <&csi_frag>, "target:0=",<&csi0>,
  64                        <&clk_frag>, "target:0=",<&cam0_clk>,
  65                        <&reg_frag>, "target:0=",<&cam0_reg>,
  66 +                      <&reg_alwayson_frag>, "target:0=",<&cam0_reg>,
  67                        <&imx296>, "clocks:0=",<&cam0_clk>,
  68                        <&imx296>, "avdd-supply:0=",<&cam0_reg>;
  69                 clock-frequency = <&clk_over>, "clock-frequency:0";
  70 +               always-on = <0>, "+99";
  71         };
  72  };
  73 --- a/arch/arm/boot/dts/overlays/imx477_378-overlay.dtsi
  74 +++ b/arch/arm/boot/dts/overlays/imx477_378-overlay.dtsi
  75 @@ -33,6 +33,13 @@
  76                 };
  77         };
  78
  79 +       reg_alwayson_frag: fragment@99 {
  80 +               target = <&cam1_reg>;
  81 +               __dormant__ {
  82 +                       regulator-always-on;
  83 +               };
  84 +       };
  85 +
  86         i2c_frag: fragment@100 {
  87                 target = <&i2c_csi_dsi>;
  88                 __overlay__ {
  89 @@ -69,8 +76,10 @@
  90                        <&csi_frag>, "target:0=",<&csi0>,
  91                        <&clk_frag>, "target:0=",<&cam0_clk>,
  92                        <&reg_frag>, "target:0=",<&cam0_reg>,
  93 +                      <&reg_alwayson_frag>, "target:0=",<&cam0_reg>,
  94                        <&cam_node>, "clocks:0=",<&cam0_clk>,
  95                        <&cam_node>, "VANA-supply:0=",<&cam0_reg>;
  96 +               always-on = <0>, "+99";
  97         };
  98  };
  99