Author: andrew Date: Tue Feb 16 11:51:54 2016 New Revision: 295658 URL: https://svnweb.freebsd.org/changeset/base/295658
Log: Add a sysctl to read the internal temperature of the AXP209 Power Management IC. Submitted by: Jared McNeill <jmcne...@invisible.ca> Differential Revision: https://reviews.freebsd.org/D5298 Modified: head/sys/arm/allwinner/axp209.c Modified: head/sys/arm/allwinner/axp209.c ============================================================================== --- head/sys/arm/allwinner/axp209.c Tue Feb 16 11:45:46 2016 (r295657) +++ head/sys/arm/allwinner/axp209.c Tue Feb 16 11:51:54 2016 (r295658) @@ -41,6 +41,7 @@ __FBSDID("$FreeBSD$"); #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 @@ __FBSDID("$FreeBSD$"); #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 @@ axp209_write(device_t dev, uint8_t reg, 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 @@ axp209_attach(device_t dev) 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); } _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
