Add I2C OCC support for P8 systems
P8 system uses I2C OCC and it uses different driver for occ-hwmon.
Add `--enable-i2c-occ` configure option to enable the support.
It searches i2c device names in sysfs to get all occ-hwmon devices and
use the i2c device name to bind/unbind the driver.
The occ control object path for I2C OCC hwmon becomes something like
/org/open_power/control/3_0050, where 3_0050 is the i2c address.
Change-Id: I8b9d8d4429c563528dc88fb2679b265c53d7a2d5
Signed-off-by: Lei YU <mine260309@gmail.com>
diff --git a/configure.ac b/configure.ac
index 254cc77..b121f55 100644
--- a/configure.ac
+++ b/configure.ac
@@ -57,6 +57,17 @@
AX_CXX_COMPILE_STDCXX_14([noext])
AX_APPEND_COMPILE_FLAGS([-Wall -Werror], [CXXFLAGS])
+AC_ARG_ENABLE([i2c-occ],
+ AS_HELP_STRING([--enable-i2c-occ], [Enable I2C OCC support])
+)
+AS_IF([test "x$enable_i2c_occ" == "xyes"],
+ AC_MSG_NOTICE([Enabling I2C OCC])
+ [
+ cpp_flags="-DI2C_OCC"
+ ]
+ AC_SUBST([CPPFLAGS], [$cpp_flags])
+)
+
AC_ARG_VAR(OCC_CONTROL_BUSNAME, [The Dbus busname to own])
AS_IF([test "x$OCC_CONTROL_BUSNAME" == "x"], [OCC_CONTROL_BUSNAME="org.open_power.OCC.Control"])
AC_DEFINE_UNQUOTED([OCC_CONTROL_BUSNAME], ["$OCC_CONTROL_BUSNAME"], [The DBus busname to own])
@@ -86,12 +97,21 @@
AC_DEFINE_UNQUOTED([OCC_MASTER_NAME], ["$OCC_MASTER_NAME"], [The OCC master object name])
AC_ARG_VAR(OCC_HWMON_PATH, [The OCC hwmon path])
-AS_IF([test "x$OCC_HWMON_PATH" == "x"], [OCC_HWMON_PATH="/sys/bus/platform/drivers/occ-hwmon/"])
-AC_DEFINE_UNQUOTED([OCC_HWMON_PATH], ["$OCC_HWMON_PATH"], [The OCC hwmon path])
-
AC_ARG_VAR(DEV_PATH, [The device path])
-AS_IF([test "x$DEV_PATH" == "x"], [DEV_PATH="/sys/bus/platform/devices/"])
+AC_ARG_VAR(I2C_OCC_DEVICE_NAME, [The device name of i2c occ hwmon])
+AS_IF([test "x$enable_i2c_occ" == "xyes"],
+ # If enable_2c_occ is defined, define occ hwmon path for I2C and its driver's name
+ AS_IF([test "x$OCC_HWMON_PATH" == "x"], [OCC_HWMON_PATH="/sys/bus/i2c/drivers/occ-hwmon/"])
+ AS_IF([test "x$DEV_PATH" == "x"], [DEV_PATH="/sys/bus/i2c/devices"])
+ AS_IF([test "x$I2C_OCC_DEVICE_NAME" == "x"], [I2C_OCC_DEVICE_NAME="p8-occ-hwmon"]),
+
+ # Else, define occ hwmon path for FSI
+ AS_IF([test "x$OCC_HWMON_PATH" == "x"], [OCC_HWMON_PATH="/sys/bus/platform/drivers/occ-hwmon/"])
+ AS_IF([test "x$DEV_PATH" == "x"], [DEV_PATH="/sys/bus/platform/devices/"]),
+)
+AC_DEFINE_UNQUOTED([OCC_HWMON_PATH], ["$OCC_HWMON_PATH"], [The OCC hwmon path])
AC_DEFINE_UNQUOTED([DEV_PATH], ["$DEV_PATH"], [The device path])
+AC_DEFINE_UNQUOTED([I2C_OCC_DEVICE_NAME], ["$I2C_OCC_DEVICE_NAME"], [The device name of i2c occ hwmon])
AC_ARG_VAR(FSI_SCAN_FILE, [The File to write for initiating FSI rescan])
AS_IF([test "x$FSI_SCAN_FILE" == "x"], [FSI_SCAN_FILE="/sys/devices/platform/gpio-fsi/fsi0/slave@00:00/00:00:00:0a/fsi1/rescan"])