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From ef6a692bf0e076c905a912fbb8e65481c354a7ca Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.com>
Date: Wed, 23 Nov 2022 11:51:38 +0000
Subject: [PATCH] overlays: i2c-sensor: Make smbus-timeout-disable
optional
Although disabling the SMBUS timeout may be useful, not all chips
support it. The driver treats attempting to disable the timeout on a
non-supporting chip as an error, so make it an option enabled using the
no_timeout parameter.
Signed-off-by: Phil Elwell <phil@raspberrypi.com>
---
arch/arm/boot/dts/overlays/README | 5 +++++
arch/arm/boot/dts/overlays/i2c-sensor-common.dtsi | 2 +-
2 files changed, 6 insertions(+), 1 deletion(-)
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -1999,6 +1999,11 @@ Params: addr Set the
use the "jc42" option.
Valid addresses are 0x18-0x1f (default 0x18)
+ no_timeout Disable the SMBUS timeout. N.B. Only supported
+ by some jc42 devices - using with an
+ incompatible device can stop it from being
+ activated.
+
sht3x Select the Sensiron SHT3x temperature and
humidity sensor. Valid addresses 0x44-0x45,
default 0x44
--- a/arch/arm/boot/dts/overlays/i2c-sensor-common.dtsi
+++ b/arch/arm/boot/dts/overlays/i2c-sensor-common.dtsi
@@ -347,7 +347,6 @@
jc42: jc42@18 {
compatible = "jedec,jc-42.4-temp";
reg = <0x18>;
- smbus-timeout-disable;
};
};
};
@@ -383,5 +382,6 @@
<&ds1621>,"reg:0", <&bme680>,"reg:0", <&ccs811>,"reg:0",
<&bh1750>,"reg:0", <&mcp980x>,"reg:0", <&jc42>,"reg:0";
int_pin = <&max30102>, "interrupts:0";
+ no_timeout = <&jc42>, "smbus-timeout-disable?";
};
};
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