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This patch provides the option to skip I2C probes on the SCH primary bus adapters.

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This commit is contained in:
Jeffrey Townsend
2016-12-23 18:19:18 +00:00
parent 031be2cd46
commit e119c797e8
1 changed files with 25 additions and 0 deletions
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25
packages/base/any/kernels/3.16-lts/patches/drivers-i2c-busses-i2c-isch-probe-param.patch Normal file
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@@ -0,0 +1,25 @@
--- a/drivers/i2c/busses/i2c-isch.c 2016-11-20 01:17:41.000000000 +0000
+++ b/drivers/i2c/busses/i2c-isch.c 2016-12-22 23:34:15.908744426 +0000
@@ -62,6 +62,10 @@ static int backbone_speed = 33000; /* ba
module_param(backbone_speed, int, S_IRUSR | S_IWUSR);
MODULE_PARM_DESC(backbone_speed, "Backbone speed in kHz, (default = 33000)");
+static int probe = 1;
+module_param(probe, int, S_IRUSR | S_IWUSR);
+MODULE_PARM_DESC(probe, "Enable or disable i2c adapter probing. Default = 1");
+
/*
* Start the i2c transaction -- the i2c_access will prepare the transaction
* and this function will execute it.
@@ -291,6 +295,11 @@ static int smbus_sch_probe(struct platfo
snprintf(sch_adapter.name, sizeof(sch_adapter.name),
"SMBus SCH adapter at %04x", sch_smba);
+ if(!probe) {
+ sch_adapter.class = 0;
+ dev_warn(&dev->dev, "bus probing disabled by module parameter.\n");
+ }
+
retval = i2c_add_adapter(&sch_adapter);
if (retval) {
dev_err(&dev->dev, "Couldn't register adapter!\n");