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Index: head/sys/arm/allwinner/axp209.c
===================================================================
--- head/sys/arm/allwinner/axp209.c
+++ head/sys/arm/allwinner/axp209.c
@@ -41,6 +41,7 @@
#include <sys/reboot.h>
#include <sys/resource.h>
#include <sys/rman.h>
+#include <sys/sysctl.h>
#include <dev/iicbus/iicbus.h>
#include <dev/iicbus/iiconf.h>
@@ -62,11 +63,23 @@
#define AXP209_SHUTBAT 0x32
#define AXP209_SHUTBAT_SHUTDOWN 0x80
+/* Temperature monitor */
+#define AXP209_TEMPMON 0x5e
+#define AXP209_TEMPMON_H(a) ((a) << 4)
+#define AXP209_TEMPMON_L(a) ((a) & 0xf)
+#define AXP209_TEMPMON_MIN 1447 /* -144.7C */
+
+#define AXP209_0C_TO_K 2732
+
struct axp209_softc {
uint32_t addr;
struct intr_config_hook enum_hook;
};
+enum axp209_sensor {
+ AXP209_TEMP
+};
+
static int
axp209_read(device_t dev, uint8_t reg, uint8_t *data, uint8_t size)
{
@@ -104,6 +117,28 @@
return (iicbus_transfer(dev, &msg, 1));
}
+static int
+axp209_sysctl(SYSCTL_HANDLER_ARGS)
+{
+ device_t dev = arg1;
+ enum axp209_sensor sensor = arg2;
+ uint8_t data[2];
+ int val, error;
+
+ if (sensor != AXP209_TEMP)
+ return (ENOENT);
+
+ error = axp209_read(dev, AXP209_TEMPMON, data, 2);
+ if (error != 0)
+ return (error);
+
+ /* Temperature is between -144.7C and 264.8C, step +0.1C */
+ val = (AXP209_TEMPMON_H(data[0]) | AXP209_TEMPMON_L(data[1])) -
+ AXP209_TEMPMON_MIN + AXP209_0C_TO_K;
+
+ return sysctl_handle_opaque(oidp, &val, sizeof(val), req);
+}
+
static void
axp209_shutdown(void *devp, int howto)
{
@@ -163,6 +198,12 @@
EVENTHANDLER_REGISTER(shutdown_final, axp209_shutdown, dev,
SHUTDOWN_PRI_LAST);
+ SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
+ SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
+ OID_AUTO, "temp",
+ CTLTYPE_INT | CTLFLAG_RD,
+ dev, AXP209_TEMP, axp209_sysctl, "IK", "Internal temperature");
+
return (0);
}

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